ChangeLog

2026-05-25  Bill Six  <billsix@gmail.com>

	Examples: native assembly listings + runnable executables via
	a Makefile, in the Docker build.

	Each C demo now builds along the full /pgu-style flow
	<demo>.c -> <demo>.s -> bin/<demo>: a clean, readable native
	assembly listing beside its <demo>.c / hand-written <demo>.asm
	(read all three vocabularies in one directory), and that same
	.s assembled + linked into a runnable native executable.
	Native = the build host's arch (x86_64, AArch64, ...): `cc`
	with no --target follows the host.  The MIPS side (the
	hand-written .asm run under spim + its golden tests) is owned
	by meson and unchanged.

	* examples/src/Makefile: new.  Derives demos vs. helpers from
	  the tree (top-level *.c + the two lib sources are helpers;
	  every other *.c is a demo with its own _start).  %.s: %.c
	  emits the listing with the educational flag set (-O0,
	  -fomit-frame-pointer, -fno-asynchronous-unwind-tables,
	  -fno-unwind-tables, -fno-stack-protector, -fverbose-asm);
	  %.o: %.s assembles it; bin/<demo> links the demo's .s with
	  -nostdlib against helper archives libio.a/libstdlib.a/
	  libctype.a (archive semantics pull only the members each demo
	  references, so no per-demo dep lists).  Targets: all,
	  listings, executables, clean.  CC overridable.
	* examples/src/meson.build (edu_args): dropped -save-temps=obj
	  and -fverbose-asm.  Listing generation moved to the Makefile,
	  which produces cleaner output (no -g/.cfi_ noise) at a sane
	  path; the meson build no longer emits the buried
	  builddir/.../<demo>.p/<munged>.c.s.  Supersedes the approach
	  in tasks/archive/PLAN-asm-listings.md.
	* Dockerfile: add `make` to the dnf install list; run
	  `make -C examples/src CC=clang all` after the meson
	  build/test so listings + executables ship in the image.
	* examples/.gitignore: ignore *.s, *.o, *.a, and src/bin/
	  (build artifacts; hand-written sources are all *.asm).
	* examples/READING-ORDER.md: rewrote the "Comparing the C
	  compiler's translation" section to point at the beside-source
	  <demo>.s and the runnable bin/<demo>, with how to regenerate.
	* examples/tasks/PLAN-asm-listings-makefile.md: new plan doc.

2026-05-23  Bill Six  <billsix@gmail.com>

	Teaching mode: base+offset coverage and display polish.

	* tests/tt.explain.s: new multi-slot stack-frame save/restore
	  block (sw $a0/$a1/$a2/$ra at $sp+4/+8/+12/+16, then matching
	  loads) and a negative-offset locals block (sw/lw at -4($fp)
	  and -8($fp)).  Closes the offset-diversity gap — previously
	  only zero and offset=4 were exercised.
	* src/display-utils.c: int_reg_names[30] renamed from "s8" to
	  "fp".  The disassembler now consistently shows $fp when the
	  source uses register 30 as a frame pointer.  The scanner
	  already accepted both "fp" and "s8" as input, so this is a
	  display-only change.
	* src/explain.c (tpl_load, tpl_store): effective-address line
	  prints "$rs - N" instead of "$rs + -N" for negative
	  immediates.  Example: a `lw $t3, -4($fp)` now reads
	  "Effective address = $fp - 4 = 0x7fffffdc - 4 = 0x7fffffd8."

	Teaching mode: narration for the rest of MIPS's base+offset
	load/store families.

	* src/explain.c: six new templates and a shared
	  `say_effective_address()` helper.  Wired into the opcode
	  switch for 10 previously-undocumented opcodes:
	  - lwl, lwr, swl, swr (unaligned word access)
	  - ll, sc (atomic primitives — narration explains the real
	    multiprocessor semantics spim doesn't model)
	  - lwc1, ldc1, swc1, sdc1 (coprocessor-1 FP loads/stores)
	  Pre-refactor of tpl_load/tpl_store is byte-identical
	  (verified with zero-diff before new templates landed).
	* tests/tt.explain.s: added an 8-byte-aligned data buffer
	  `ubuf` and four test blocks (one per family above)
	  exercising every new opcode.
	* tests/tt.explain.expected: regenerated.  Output grew from
	  3940 to 4534 lines; zero `(no detailed explanation)`
	  fallthroughs remain in the tt.explain.s run.

	CLI: support multiple `-f` files on the command line.

	* src/spim.c: `-f` can now be specified repeatedly; each file
	  accumulates into one symbol table the same way the REPL's
	  `load` command does (forward references resolve across
	  files).  Hoisted `initialize_world` out of the per-file
	  branch with a lazy-init guard; replaced `break` with
	  `continue` for explicit `-f`; positional bare-arg shortcut
	  retained as a one-shot for backwards compat.  Post-loop
	  fixup sets `program_argc/argv` from the last loaded file
	  when no positional program args follow the `-f` files.
	* tests/tt.multifile.s, tests/tt.multifile.helper.s: new
	  regression — two-file program tested in both load orders to
	  confirm cross-file forward references resolve.
	* tests/run-test.sh, meson.build: new `multifile` test
	  registered (test count: 22 → 23).
	* Documentation/spim.1, src/spim.c (usage string): document
	  the multi-`-file`/multi-`-f` syntax and the
	  symbol-table-accumulation semantics.

	Repo merge: absorb the standalone /examples curriculum into
	examples/ subdirectory.

	Goal was one Dockerfile, one `meson test`, and goldens
	enforced at container-build time (any drift between the C
	side and the spim-asm side of a paired demo fails the build).
	Full task writeup in tasks/merge-examples-into-spimulator.md.

	* examples/: 27 commits from the standalone repo replayed
	  with original author/email/date/message preserved (via
	  GIT_AUTHOR_* + GIT_COMMITTER_* env vars and `git archive`
	  for each commit's tree).  `git log examples/` shows the
	  full history.  Pruned: book/, Dockerfile, Makefile,
	  entrypoint/, output/, musl/ — none needed in the merged
	  tree.
	* meson.build: `subdir('examples/src')` at the bottom.  The
	  inner meson.build dropped its own `project(...)` and
	  scoped its compile/link flags per-target (so -nostdlib
	  doesn't leak into spim's own build, which needs libc +
	  libedit).  6 demo tests registered in the 'examples' meson
	  suite (ctype-demo, atoi-demo, abs-demo, exit-demo,
	  bsearch-demo, atexit-demo).  Test count: 23 → 29.
	* examples/tests/run-demo.sh: per-demo runner that validates
	  BOTH the C binary AND the spim-asm version against the
	  same .expected golden, plus .expected-status where pinned.
	  Fails fast on any mismatch.
	* Dockerfile: added `diffutils` to dnf install (run-demo.sh
	  uses `diff -q`); added `COPY examples/`; the existing
	  `RUN meson test` step now covers both suites, so any
	  drift fails the image build.
	* tasks/README.md (new): two-surface index — tasks/ for
	  spim-internal, examples/tasks/ for curriculum.
	* Path-reference sweep: ~40 stale /examples/ prose
	  references → examples/; 4 broken ../spimulator/ relative
	  markdown links fixed; LICENSE-musl files lost their stale
	  "Local copy /examples/musl/" lines.

2026-05-20  Bill Six  <billsix@gmail.com>

	Post-Phase-5 naming cleanup (four tiers):

	* Tier 3: stale `bison` / `parser.y` / `scanner.l` / `Phase N`
	  / `coexist` comment references swept from src/hp_*.c and
	  include/hp_*.h.
	* Tier 2a: `hp_` prefix dropped throughout (~370 occurrences).
	  Source files renamed: hp_scanner.c → scanner.c, hp_parser.c
	  → parser.c, hp_pseudo_op.c → pseudo_op.c.  Header
	  hp_parser.h merged into parser.h; hp_pseudo_op.h renamed
	  to pseudo_op.h.  Three duplicate-symbol merges
	  (hp_imm_op_to_op + imm_op_to_op, hp_initialize_parser +
	  initialize_parser wrapper, hp_erroneous_line +
	  erroneous_line wrapper).
	* Tier 2b: flex/bison-era REPL names renamed.  yylex /
	  yyparse wrappers deleted; spim.c's read_token() and
	  ASM_CMD case call scanner_advance() / parse_file()
	  directly.  yyerror → parse_error, yywarn → parse_warn,
	  push_scanner / pop_scanner → scanner_push_source /
	  scanner_pop_source, initialize_scanner / initialize_parser
	  → scanner_init / parser_init.  Dead #define YYSTYPE
	  macro removed from scanner.h.
	* Tier 2c: 390 Y_* tokens renamed to TOK_* (Y_ADD_OP →
	  TOK_ADD_OP, Y_EOF → TOK_EOF, etc.).  yylval → scan_value,
	  yylval_t → scan_value_t.  1430 total substitutions across
	  11 files.
	* Tier 2d: dead only_id shim deleted from scanner.h /
	  scanner.c.

	Each tier passed the verification gate independently.  The
	following 2026-05-19 entry describes the original Phase-5
	work; its references to Y_* tokens and yyerror are
	historically accurate but those names are now TOK_* and
	parse_error respectively.

2026-05-19  Bill Six  <billsix@gmail.com>

	* src/scanner.l, src/parser.y: deleted (Phase 5).
	* include/tokens.h: new, replaces the bison-generated
	  parser_yacc.h; defines all Y_* tokens via op.h's X-macro
	  pattern plus 8 explicit structural tokens (Y_EOF, Y_NL,
	  Y_INT, Y_ID, Y_REG, Y_FP_REG, Y_STR, Y_FP).
	* include/parser.h: trimmed to the surface the runtime still
	  needs (yyerror, imm_op_to_op, fix_current_label_address,
	  data_dir/text_dir/parse_error* globals).  initialize_parser
	  and yyparse went away with bison.
	* include/scanner.h: dropped flex-only yylex / push_scanner /
	  pop_scanner declarations; the surviving runtime-facing
	  helpers (initialize_scanner, scanner_start_line,
	  erroneous_line, source_line, register_name_to_number) are
	  now satisfied by src/hp_scanner.c.
	* src/hp_scanner.c: relocate the runtime globals (line_no,
	  yylval, only_id) and the register_tbl + register_name_to_
	  number lookup that lived in scanner.l.  Add flex-name
	  compatibility wrappers (yylex returning 0 for Y_EOF;
	  push_scanner / pop_scanner with an 8-deep snapshot stack;
	  initialize_scanner / initialize_parser shims) so spim.c's
	  REPL command tokenizer keeps working unchanged.  Add
	  erroneous_line / source_line / scanner_start_line public
	  aliases for the existing hp_* internals.
	* src/hp_parser.c: relocate data_dir / text_dir definitions.
	  Promote hp_fix_line_labels to fix_current_label_address
	  (public), so data.c / inst.c's natural alignment-fix-up
	  flow operates on the hand parser's label state directly.
	  Add a yyparse() shim that calls hp_parse_file() for the
	  REPL's ASM_CMD path.  Expose hp_input_file_name via
	  hp_input_file_name_get / hp_set_input_file_name so
	  hp_pseudo_op.c's yyerror funnel can format messages.
	* src/hp_pseudo_op.c: take ownership of parse_error_occurred
	  / parse_errors_seen / yyerror / yywarn / imm_op_to_op
	  (canonical-named definitions, used by runtime call sites
	  in sym-tbl.c and inst.c).
	* src/spim.c: strip the `-parser=` flag, parser_kind enum,
	  and the help-text lines describing them.  Add forward
	  externs for the hand-parser-supplied yylex / yyparse /
	  push_scanner / pop_scanner / initialize_scanner /
	  initialize_parser names that the REPL command tokenizer
	  still calls.
	* src/spim-utils.c: drop use_hand_parser / saved_use_hand
	  branching from read_assembly_file and the exception-file
	  loader.  The hand parser is the sole parser.  Exception
	  handler (src/exceptions.s) is loaded through the same
	  hp_initialize_parser + hp_parse_file path as user code.
	* meson.build: drop the flex / bison `find_program` calls
	  and the two `custom_target` rules that generated
	  lex.yy.c and parser_yacc.{c,h}.
	* Dockerfile: drop `flex` and `bison` from the `dnf install`
	  list.
	* tests/parity-harness.sh: deleted — there is no second
	  parser to compare against any more.
	Phase 5 of the hand-written-parser migration: bison and
	flex removed.  Spim is now a pure-C build with no parser
	generator dependencies.  The hand-written recursive-descent
	parser is the only path.

	Two pre-Phase-5 hand-parser gaps fixed because exceptions.s
	tripped both:

	  - hp_sync_to_nl() was over-consuming the trailing newline,
	    leaving parse_line's outer newline check to mis-fire
	    "Extra tokens after instruction" on whatever followed
	    an ignored directive like `.set noat`.  Now stops AT
	    the newline; parse_line consumes it.
	  - parse_i2() rejected the 2-operand shorthand for
	    BINARY_LOGICALI_OPS — `ori $k0, 0x1` (= ori $k0, $k0,
	    0x1).  Mirrors parser.y:991-994.  Used heavily by
	    exception handlers.

	Tested:
	  - Dockerfile smoke set (bare/core/le/argv/args-cmd/
	    read_int_eof) passes.
	  - tt.dir, tt.octal_escape, tt.return_value (exit 42),
	    tt.unaligned (exit 132 = 128+4), tt.stderr_split (ok on
	    stdout), tt.missing_main (exit 1), tt.parse_error (exit
	    2) all behave as expected.
	  - /examples curriculum spot-checks (01-helloworld,
	    06-fizzbuzz, 18-cksum, 19-echo, 20-factorial,
	    22-binary-search) produce identical output to the
	    bison-era baseline.

2026-05-19  Bill Six  <billsix@gmail.com>

	* include/hp_parser.h, include/hp_pseudo_op.h:
	* src/hp_scanner.c, src/hp_parser.c, src/hp_pseudo_op.c:
	* src/spim.c (parser_kind, main): default-flipped flag parser
	* src/spim-utils.c (read_assembly_file, use_hand_parser):
	* tests/parity-harness.sh:
	* tasks/handwritten-parser-migration.md,
	  tasks/scanner-parser-inventory.md,
	  tasks/handwritten-parser-design.md:
	Phases 0-4 of the hand-written-parser migration land.  flex
	+ bison continue to coexist behind `-parser=bison`; the
	hand-written recursive-descent parser becomes the default.

	The hand parser covers every construct used by the
	/examples curriculum (44 / 44 demos parity-clean, byte-
	identical assembled output against bison).  10 / 19
	spim regression tests in tests/tt.*.s also pass; the
	remaining 9 use FP / coproc / TLB / unaligned-load
	constructs not yet ported (filed for future Phase 3
	cleanup; users fall back with `-parser=bison`).

	Bugs found and fixed during the migration:
	  - Branch operand order (i_type_inst_free takes rt/rs not
	    rs/rt; SRC2 is the rt slot).
	  - Cached-lookahead violation of bison's only_id global —
	    the per-token flag leaked past the token it was
	    intended to affect.  Replaced with a self-clearing
	    hp_scanner_force_identifier() that recognizes the
	    cached state.
	  - PC-relative branch displacement: parser.y's LABEL
	    production sets pc_relative=true on the imm_expr
	    (overlooked because no grep showed it); without this,
	    branches encode as absolute offsets and resolve_a_label
	    silently does the wrong thing.
	  - Label fix-up across line boundaries: bison's CMD: TERM
	    production does NOT clear_labels, so a bare `crctab:`
	    line leaves this_line_labels non-empty for the next
	    line's directive to retroactively align via
	    fix_current_label_address.  Reproduced in
	    hp_this_line_labels.
	  - data.c's enable_data_auto_alignment static is
	    unreadable from outside; tracked our own hp_auto_align
	    mirror so `.align 0` correctly disables subsequent
	    auto-alignment.

	Phase 5 (drop bison entirely) is deferred; bison remains in
	the build as the fallback parser.  See
	tasks/handwritten-parser-migration.md for the full status.

2026-05-19  Bill Six  <billsix@gmail.com>

	* src/spim.c (main):
	* src/exceptions.s (__start):
	* src/parser.y (yyerror):
	* src/run.c (raise_exception):
	* src/spim-utils.c (read_assembly_file):
	* include/parser.h, include/inst.h:
	* tests/tt.stderr_split.s, tt.return_value.s,
	  tt.parse_error.s, tt.missing_main.s, tt.unaligned.s:
	* tasks/unix-process-conformance.md:
	Make `spimulator -f foo.asm` behave as a regular Unix
	process so it can be used in pipelines, with `$?`, and in
	CI/Makefiles.  Four distinct fixes:

	  (1) message_out now defaults to stderr, not stdout.  The
	      "Loaded: …" banner and "The following symbols are
	      undefined" notice no longer pollute the data stream.
	  (2) __start now passes main's $v0 through as the exit
	      status (via syscall 17 instead of syscall 10), so
	      `return N` from main becomes shell `$?`.
	  (3) Parser errors, missing files, and undefined symbols
	      set a non-zero exit code (2, 2, and 1 respectively)
	      via a new `parse_errors_seen` counter.  spim no longer
	      drops into the REPL when -file was supplied but the
	      file couldn't be loaded.
	  (4) Runtime exceptions (alignment fault, address error,
	      arithmetic overflow, etc.) now lift into a shell-
	      visible non-zero exit code: 128 + ExcCode, mirroring
	      the shell's 128 + signum convention for signal-
	      killed processes.  A new `first_bad_exception` latch
	      in raise_exception() records the first non-syscall,
	      non-breakpoint, non-interrupt exception.  Explicit
	      exit2(N != 0) takes precedence.

	Motivation: support a possible rewrite of "Programming from
	the Ground Up" targeting MIPS-on-spim.  PGU's first chapter
	teaches `$?` inspection; that arc only works if spim is a
	well-behaved process.

	Consequence to be addressed in a follow-up: /examples demos
	that `jr $ra` from main without first setting $v0 = 0 now
	inherit whatever value happened to be in $v0 (typically the
	syscall number of the last operation).  Several demos exit
	non-zero as a result.  Right behavior, curriculum sweep
	pending.

	* src/scanner.l (copy_str):
	Fix octal-escape decoding in .asciiz strings.  The high
	octal digit was shifted by 3 bits instead of 6, so a
	three-digit octal escape `\abc` decoded to (a+b)*8+c
	rather than a*64+b*8+c.  In particular `\134` (intended
	backslash, 0x5C) produced 0x24 ('$') instead.

	The bug was inert until /examples/src/35-od (od -c demo)
	tried to print a literal backslash; copy_str does not
	support `\\` either, so `\134` was the only path
	available, and it was silently wrong.

	* tests/tt.octal_escape.s:
	New regression test.  Decodes `\134`, `\044`, `\120` and
	verifies the resulting bytes are 0x5C, 0x24, 0x50.

	* tasks/octal-escape-fix.md:
	Bug writeup, with the diff-level explanation, the
	surfacing context, and a note that `scan_escape` (for
	`'\X'` char literals) still does not support octal at
	all — left untouched because no demo needs it.

2023-08-04  James Larus  <larus@Jim-Macbook-Max.local>

      * Release:  9.1.24

2023-08-01  James Larus  <larus@Jim-Macbook-Max.local>

        * main.cpp:
        Missing include.

        * spim-utils.cpp README:
        Update notice.

2022-11-08  James Larus  <larus@Jim-Macbook-Max.local>

	* mem.c (bad_mem_write)
	[https://sourceforge.net/p/spimsimulator/patches/7/]:
	null memory ref when writing to text location not containing instruction.

2022-05-11  James Larus  <larus@icdhcp-1-244.epfl.ch>

	* spim/spim.cpp (main) [https://sourceforge.net/p/spimsimulator/bugs/104/]:
	spim did not properly parse command line arguments to assembly program.

2022-03-15  James Larus  <larus@Jim-Macbook-Max.local>

	* QtSpim/main.cpp [https://sourceforge.net/p/spimsimulator/bugs/103/]:
	Fix incorrect LOCALE on Linux.

2022-02-20  James Larus  <larus@Jim-Macbook-Max.local>

	* spim/spim.cpp
	[https://sourceforge.net/p/spimsimulator/bugs/102/:
	Helpstring for -assemble option to spim was incorrect.

2021-12-06  Larus  <larus@Jim-Macbook-Air>

	* Release: 9.1.23

2021-12-05  larus  <larus@ubuntu>

	* QtSpim.pro
	Work around pointless error message from gnutils mv.

	* bin/release-debian
	Update paths

2021-12-05  U-DESKTOP-OQE31KH\Larus  <Larus@DESKTOP-OQE31KH>

	* bin/release-win:
	Fix paths for QT 5.

	* QtSpim.pro:
	Fixed mismatched parser file names and eliminated cached copies of parser and scanner.
	Use Linux sh to move files, not cmd.

2021-12-04  Larus  <larus@Jim-Macbook-Air>

	* QtSpim/macinfo.plist
	[https://sourceforge.net/p/spimsimulator/bugs/87/]:
	Fix version number for MacOS Finder.

	* README, README.rtf
	Note that QtSpim does not compile with QT version 6.

	* QtSpim_Mac.pkgproj, release-osx:
	Fix paths for Qt5.

2021-10-19  Larus  <larus@Jim-Macbook-Air>

	* data.cpp, inst.cpp, run.h:
	Eliminate compiler warnings.

2021-10-11  Larus  <larus@Jim-Macbook-Air>

	* data.cpp, inst.cpp, parser.y [https://sourceforge.net/p/spimsimulator/bugs/100/]:
	Fix .align directive

2021-09-20  Larus  <larus@Jim-Macbook-Air>

	* Update test case.

2020-12-19  Larus  <larus@Jim-Macbook-Air>

	* CPU/parser.y Tests/tt.bare.s [https://sourceforge.net/p/spimsimulator/bugs/99/]:
	Missing nops in code generated for pseduo instructions when
	running with delayed branches.

2020-12-05  Larus  <larus@Jim-Macbook-Air>

        * CPU/run.cpp, spim-utils.cpp, reg.h, display-utils.cpp Tests/tt.core.s [https://sourceforge.net/p/spimsimulator/bugs/98/]:
        Fix floating point condition code, which only really worked for CC = 0, default.

2020-07-13  Larus  <larus@Jim-Macbook-Air>

	* CPU/inst.cpp [https://sourceforge.net/p/spimsimulator/bugs/97/]:
	Incorrect call to write_ouput allows string injection.

2020-06-02  Larus  <larus@Jim-Macbook-Air>

	* CPU/inst.{cpp,h}, spim/Makefile [https://sourceforge.net/p/spimsimulator/bugs/96/]:
	Fix problem with incorrect decoding of binary values for FP instructions.

2020-05-09  larus  <larus@ubuntu>

	* Release 9.1.22 (Linux only):

	* QtSpim/QtSpim.pro:
	Use libGL from Qt installation rather than require full installation of OpenCL.

	* bin/release-debin:
	Fix Linux by explicity adding libraries files that aren't dll'ed.

2020-01-17  Larus  <larus@Jim-Macbook-Air>

	* Release 9.1.21
	
	* CPU/version.h:

2020-01-15  Larus  <larus@Jim-Macbook-Air>

	* CPU/parser.y:
	Fixed type error (g++-9).

2020-01-14  Larus  <larus@Jim-Macbook-Air>

	* Update copyrights.

	* Simplify MacOS packaging by moving file update to shell script
	from Packages specification.

	* Cleanup QMake process a bit.

2020-01-13  Larus  <larus@Jim-Macbook-Air>

	* QtSpim/QtSpim.pro:
	Delete unused statements.

2019-11-03  Larus  <larus@Jim-Macbook-Air>

	* CPU/inst.cpp (inst_decode) [jashank.jeremy@unsw.edu.au]:
	Miss second highest order bit in j instruction due to bad mask.

2019-04-13  Larus  <larus@Jim-Macbook-Air>

	* Documentation/H_P_AppendixA/HP_AppA.html [https://sourceforge.net/p/spimsimulator/bugs/88:
	Formatting problems in typos in mflo, mfhi.

2018-11-23  Larus  <larus@Jim-Macbook-Air>

	* README (https):
	Fix URLs for sourceforge.

2018-11-09  Larus  <larus@Jim-Macbook-Air>

	* Documentation/H_P_AppendixA/HP_AppA.html [https://sourceforge.net/p/spimsimulator/bugs/86/]:
	Opcode for swc1 was documented incorrectly as 0x31 instead of 0x39.

2018-09-16  Larus  <larus@Jim-Macbook-Air>

	* spim/Makefile, xspim/Makefile
	[https://sourceforge.net/p/spimsimulator/patches/6]:
	Improvements to Makefiles

2017-08-29  Larus  <larus@Jim-Macbook-Air>

	* CPU/version.h (SPIM_VERSION):
	Release 9.1.20

	* spimview.ui [https://sourceforge.net/p/spimsimulator/bugs/81]:
	Typo "parmeter"

	* state.cpp [https://sourceforge.net/p/spimsimulator/bugs/81]:
	Add message warning QtSpim will exit to restore window state.


2017-07-28    <larus@IC-LMC-ICDO-01>

	* Setup/QtSpim_Win_Deployment:
	Delete VisualStudio projects (InstallShield no longer works) and
	move to WiX to build installer.

	* QtSpim/menu.cpp (help_ViewHelp):
	Use full path for help file on Windows so QtSpim can run anywhere.

2017-07-25  Larus  <larus@Jim-Macbook-Air>

        * CPU/version.h (SPIM_VERSION):
        Release 9.1.19

2017-06-09  Larus  <larus@Jim-Macbook-Air>

        * QtSpim/main.cpp (main):
        Explicitly specify organization name and url to work around
        incompatibility on MacOS for settings.

2017-02-18  Larus  <larus@Jim-Macbook-Air>

        * QtSpim/regwin.cpp (formatFloat) [https://sourceforge.net/p/spimsimulator/bugs/76/]:
        Display binary values for floats to 32 bits.

2017-01-20  Larus  <larus@Jim-Macbook-Air>

        *
        Rebuild QtSpim on Mac with Qt5.5 because Qt5.7 has broken
        macdeployqt that does not update paths to frameworks in frameworks
        copied into the app.

2017-01-03  Larus  <larus@Jim-Macbook-Air>

        *
        Release 9.1.18

2017-01-03  James Larus  <larus@ubuntu>

        * control.prototype, qtspim.desktop:
        Update version number.

        * QtSpim/QtSpim.pro, bin/release-debian:
        Set RPATH in linker rather than using chrpath (which breaks in Ubuntu 16.04).

2017-01-03  Larus  <larus@Jim-Macbook-Air>

        * spimview.cpp:
        Update organization name.

        * macinfo.plist:
        Update version number.

        * spim-utils.cpp, version.h:
        Update copyright date and release date.

2016-11-25  Larus  <larus@Jim-Macbook-Air>

        * QtSpim/spimview.cpp, menu.cpp, settings.ui [Renaud PACALET pacalet@users.sf.ne]:
        Add button to reset exception handler to default.

        * QtSpim/QtSpim.pro, CPU/*.c, spim/Makefile:
        Move over completely to c++ compilation since the new version of
        Qt requires c++11.

2016-11-23  Larus  <larus@Jim-Macbook-Air>

        * CPU/version.h
        Version 9.1.18

        * Documentation/H_P_AppendixA/HHP_AppA.html:
        Fix register usage for syscalls in Table 9.1.

2016-02-27  Larus  <larus@Jim-Macbook-Air>

        *  QtSpim/menu.cpp:
        Unnecessary refresh of register display.

        * QtSpim/spimview.h, regwin.cpp:
        Did not highlight changes to double precision registers correctly.

2015-12-29  Larus  <larus@Jim-Macbook-Air>

        * CPU/version.h (SPIM_VERSION):
        Version 9.1.17

        * summary.rtf:
        Update installation instructions for latest OS X.

        * QtSpim/QtSpim.pro, menu.cpp [https://sourceforge.net/p/spimsimulator/bugs/71/]:
        Fix creation of qtspim.qhc file to eliminate embedded paths.

        *  menu.cpp, spimview.cpp, spimview.h:
        Highlight spim notice with color.

2015-12-28  Larus  <larus@ubuntu>

    * bin/release-debian [https://sourceforge.net/p/spimsimulator/support-requests/9/]:
    Forgot sqldriver on Linux.


2015-12-28  Larus  <larus@Jim-Macbook-Air>

        * CPU/scanner.l [https://sourceforge.net/p/spimsimulator/bugs/66/]:
        Improvement to previous fix for flex version detection.

2015-12-21  Larus  <larus@Jim-Macbook-Air>

        * QtSpim/state.cpp (writeSettings):
        Added check box for spim quiet mode.

2015-09-17    <larus@IC-LMC-ICDO-01>

        * QtSpim/regwin.cpp, QtSpim/datawin.cpp [https://sourceforge.net/p/spimsimulator/bugs/60/]
        Fix of bug 60 did not work on Windows because of difference in
        treatment of hex literals from Mac.

2015-08-27  Larus  <larus@Jim-Macbook-Air>

        * README, README.rtf;
        Update build instructions further.

2015-08-25  Larus  <larus@ubuntu>

        * CPU/version.h (SPIM_VERSION):
        Version 9.1.16

        * README, README.rtf:
        Update build instructions.

        * QtSpim/spimview.cpp (initialize_world):
        Update copyright notice for QtSpim to notify that Qt uses LGPL.

        * QtSpim/QtSpim.pro:
        Configuration name changed from linux-g++ -> linux-g++-32

2015-04-26  Larus  <larus@Jim-MacBook-Air.local>

        * CPU/version.h (SPIM_VERSION):
        Fix installation on Mac to include all libraries.
        Version 9.1.15.

2015-03-12  Larus  <larus@icdhcp-1-044.epfl.ch>

        * QtSpim/state.cpp (win_Restore):
        Add command on Windows menu to restore windows to initial default configuration.

2015-03-11  Larus  <larus@icdhcp-1-044.epfl.ch>

        * QtSpim/datawin.cpp (formatPartialQuadWord) [https://sourceforge.net/p/spimsimulator/bugs/61/]:
        Problem printing partial word at end of memory space.

        * CPU/scanner.l:
        Change of 2/18 made a number followed by a comma and space
        ambiguous. Now FP numbers must have a digit following decimal
        point (decimal comma).

2015-02-18  Larus  <larus@ubuntu>

        * QtSpim/regwin.cpp, QtSpim/datawin.cpp [https://sourceforge.net/p/spimsimulator/bugs/60/]
        Setting register and memory contents in QtSpim did not allow
        negative hex numbers (0xf....).

2015-02-18  Larus  <larus@icdhcp-1-196.epfl.ch>

        * spim/spim.c (top_level):
        Fixed spim's handling of stdin to allow it to read commands from
        redirected input.

        * CPU/scanner.l:
        Allow comma (,) and apostraphe (') as decimal separator in
        floating point numbers.

        * QtSpim/menu.cpp (help_ViewHelp):
        Fix Mac help.

2015-02-17  Larus  <larus@icdhcp-1-196.epfl.ch>

        * QtSpim/textwin.cpp (DisplayTextSegments):
        Force redisplay of text segment when font changes.

        * QtSpim/console.cpp (WriteOutput) [https://sourceforge.net/p/spimsimulator/patches/3/]:
        Ensure console output stays visible.

2015-02-17    <larus@IC-LMC-ICDO-01>

        * CPU/syscall.c (myInvalidParameterHandler) [https://sourceforge.net/p/spimsimulator/bugs/46/]:
        Bad parameter to system call invoked Windows Error Reporting and
        crashed spim. Instead, report error in spim.

2014-08-21  Larus  <larus@Jim-MacBook-Air.local>

        * Documentation/SourceForge/index.html:
        Update links to Qt source.

2014-05-31  Larus  <larus@Jim-MacBook-Air.local>

        * spim/spim.c [Jorge Garcia Aguilar <jorgegarag@gmail.com>]:
        Add -dump and -full_dump flags to write data and text segments
        to a file.

2014-02-02  Larus  <larus@Jim-MacBook-Air.local>

        * Setup/QtSpim_Mac_Deployment/QtSpim_Mac_pkproj:
        Fixed Mac install to include instructions how to work around
        Gatekeeper rejection of unsigned apps.

2014-01-26  Larus  <larus@Jim-MacBook-Air.local>

        * CPU/version.h (SPIM_VERSION):
        Version 9.1.13

        * QtSpim/macinfo.plist, QtSpim/QtSpim.pro, NewIcon.icns:
        Added application icon for MacOS.

        * bin/release-osx
        [Philip James, https://sourceforge.net/p/spimsimulator/bugs/54]:
        Need to package Frameworks and plugs with Mac release and change
        file paths so they can be found.

2014-01-22  Larus  <larus@Jim-MacBook-Air.local>

        * CPU/op.h [Philip Machanick <p.machanick@ru.ac.za>]:
        Break instruction does not take any arguments.

2013-12-28    <larus@IC-LMC-ICDO-01>

        * Documentation/SourceForge/index.html:
        Bad path to files on SourceForge.

2013-12-17    <larus@IC-LMC-ICDO-01>

        * New release of QtSpim for Windows to include msvcp110.dll.

2013-12-14  Larus  <larus@Jim-MacBook-Air.local>

        * CPU/version.h (SPIM_VERSION):
        Version 9.1.12

        * QtSpim/menu.cpp (help_ViewHelp):
        Further adjustment of file positions on Mac OS.

2013-12-13  Larus  <larus@Jim-MacBook-Air.local>

        * QtSpim/help/qtspim.qhcp, QtSpim/help/qtspim.qhp:
        Fix naming issues in QtSpim help. Open at top of page.

        * QtSpim/menu.cpp (help_ViewHelp):
        Properly launch Qt Assistant on Mac OS.

2013-12-11  Larus  <larus@icdhcp-1-098.epfl.ch>

        * QtSpim/QtSpim.pro:
        Set flags for clang on Mac OS.

        * CPU/run.c (run_spim):
        Eliminate nop assignments caught by clang.

2013-12-10    <larus@IC-LMC-ICDO-01>

        * CPU/version.h:
        Version 9.1.11:

        * CPU/inst.c, CPU/op.h, CPU/parser.y, Tests/tt.core.s:
        MOVF and MOVT instructions were improperly parsed, stored, and unparsed.

        * CPU/data.c (increment_data_pc):
        [https://sourceforge.net/p/spimsimulator/bugs/53]:
        Off-by-one error in computing space when growing data segment.

        * QtSpim/regwin.cpp:
        Display FP control register index values, not contents.

2013-12-09    <larus@IC-LMC-ICDO-01>

        * Switched to Visual Studio 2012, ported installer to
        InstallShieldLE since VS installer no longer supported.

2013-12-08    <larus@IC-LMC-ICDO-01>

        * CPU/version.h:
        Version 9.1.10

2013-11-14    <larus@IC-LMC-ICDO-01>

        * CPU/inst.c (eval_imm_expr):
        [https://sourceforge.net/p/spimsimulator/bugs/51]:
        Incorrectly handled indexed offset of extern symbol.

2013-11-10    <larus@IC-LMC-ICDO-01>

        * QtSpim/datawin.cpp (formatWord):
        [https://sourceforge.net/p/spimsimulator/bugs/52]:
        Negative decimal should be preceeded by spaces, not zeros, when
        printing data.

2013-10-27  Larus  <larus@ubuntu>

        * Setup/qtspim_debian_deployment/control.prototype:n
        Added Installed-Size field in DEBIAN/control file.

2013-10-15    <larus@IC-LMC-ICDO-01>

        * QtSpim/datawin.c QtSpim/spimview.h
        [https://sourceforge.net/p/spimsimulator/bugs/50]:
        Did not properly format and print data segments that were not a
        multiple of 16 bytes.

2013-10-14    <larus@IC-LMC-ICDO-01>

        * CPU/scanner.l [https://sourceforge.net/p/spimsimulator/bugs/49]:
        Did not properly scan escaped characters (e.g. '\n').

2013-10-13    <larus@IC-LMC-ICDO-01>

        * QtSpim/main.cpp, QtSpim/QtSpim.pro, QtSpim/spim_support.c
        [https://sourceforge.net/p/spimsimulator/bugs/47]
        [https://sourceforge.net/p/spimsimulator/bugs/48]:
        Port QtSpim to Qt 5.1.

2013-07-20    <JIM@LS-RED>

        * QtSpim/help/HP_AppA.html [Matthias Herlich herlich@upb.de]:
        Definition of caller/callee saved registers reversed!

2013-06-02    <JIM@LS-RED>

        * CPU/inst.c (format_an_inst) [Daniel Chester <chester@mail.eecis.udel.edu>]:
        FP compare (e.g. c.eq.s) instructions ignored condition flag
        numbers. The FP move (e.g. movt.s) instructions did not default
        condition flag.

2013-03-23    <JIM@LS-RED>

        * CPU/data.c (extern_directive) [https://sourceforge.net/p/spimsimulator/bugs/44/]:
        Multiple instance of extern directive resolved to distinct locations.

        * CPU/inst.c (i_type_inst_full_word) [https://sourceforge.net/p/spimsimulator/feature-requests/11/]:
        LW/SW of 0x8000..0xffff generated incorrect code.

2013-01-19    <JIM@LS-RED>

        * CPU/version.h:
        Version 9.1.9

        * helloworld.s [https://sourceforge.net/p/spimsimulator/feature-requests/8/]:
        Added hello world example

2013-01-06    <JIM@LS-RED>

        * spimview.cpp, console.cpp [http://sourceforge.net/p/spimsimulator/feature-requests/9/]:
        Use fixed width font for spim output to line up colums properly

2012-12-16    <JIM@LS-RED>

        * QtSpim/QtSpim.pro [sourceforge #37: https://sourceforge.net/u/smeenai/]:
        Fix flex output file argument specification.
        Include optional defines for using Win move and del commands.

2012-12-09    <Jim@X64PC>

        * CPU/version.h (SPIM_VERSION):
        Version 9.1.8

        * CPU/scanner.l [Tom Murphy wolfmurphy@gmail.com]:
        Overwrote first digit in \ooo escape sequence in string.

        * CPU/inst.c (i_type_inst) [Tom Murphy wolfmurphy@gmail.com]:
        Crashed at teqi instruction.

2012-10-21    <Jim@X64PC>

        * QtSpim/main.cpp (parseCommandLine):
        Allow multiple input files on the command line.

        * QtSpim/console.cpp (WriteOutput):
        Activate console window on input or output to raise it and give it focus.

2012-10-13    <Jim@X64PC>

        * CPU/sym-tbl.c (resolve_a_label_sub):
        Error message indicates bare machine to explain why memory address
        is too large.

2012-02-25    <Jim@LS-RED>

        * QtSpim/menu.cpp (file_LoadFile):
        Allow .a extension for assembly file.

2012-02-12    <Jim@X64PC>

        * CPU/version.h:
        Version 9.1.7

2012-02-11    <Jim@LS-RED>

        * QtSpim/spimview.h:
        Include version.h to catch dependence in menu.c on version number.

2012-02-04    <Jim@LS-RED>

        * CPU/version.:
        Version 9.1.6

        * QtSpim/regwin.cpp (formatInt) [Jeff Gitlin <jeff.gitlin@gmail.com>]:
        Returned sign-extended 64bit formatted values for negative numbers.

2012-01-07    <Jim@LS-RED>

        * CPU/data.c (increment_data_pc), inst.c, tt.core.s [Artur Golisz <artur_waw@ymail.com>]:
        Did not grow data segments properly when allocating memory with
        the .space command.

2012-01-02    <Jim@X64PC>

        * CPU/spim-utils.c (write_startup_message):
        Updated copyright date.

2012-01-02    <Jim@LS-RED>

        * CPU/version.h:
        Version 9.1.5

        * Setup/qtspim_debian_deployment/control.prototype:
        More precise dependencies for qt packages >= 4.7 to fix setup problems.


2011-12-03    <Jim@LS-RED>

        * QtSpim/main.cpp (parseCommandLine): [Esteban Stafford (estebanstafford)]:
        Did not correctly initialize memory with -file argument.

        * QtSpim/menu.cpp, console.cpp, console.h [Esteban Stafford (estebanstafford)]:
        Got in an infinite loop when single stepping or running
        interpreter blocked waiting for input.

2011-09-04    <Jim@X64PC>

        * CPU/version.h (SPIM_VERSION):
        Version 9.1.4

2011-11-25    <Jim@LS-RED>

        * spim/Makefile [W. Michael Petullo ( flyn )]:
        Inherit flags from environment.

2011-08-14    <Jim@LS-RED>

        * QtSpim/console.cpp, QtSpim/datawin.cpp, QtSpim/regwin.cpp, QtSpim/textwin.cpp [Jordan Thoms (jords12)]:
        Subwindows can receive events before main window is fully
        construct if subwindows are undocked, which lead to a null-pointer reference.

        * spim/spim.c (write_assembled_code) [George Prekas (prekgeo)]:
        Added command line argument to dump contents of text and data segments.

        * spim/spim.c:
        Clean up code for dumping text segment and comments.

2011-07-30    <Jim@LS-RED>

        * QtSpim/help/HP_AppA.html [Tatpong Katanyukul <tatpong@gmail.com>]:
        Minor typos in instruction descriptions (bgezal, div.d, sub.d).

2011-07-26    <Jim@LS-RED>

        * spim/Makefile [flyn]:
        Added $(DESTDIR) to spim/xspim install targets.

2011-07-24  Jim Larus  <jim@linuxPC>

        * Version 9.1.3

        * bin/release-debian:
        Parameterize for x64 linux.

2011-07-23  Jim Larus  <jim@linux64>

        * xspim/buttons.c:
        Changes to satisfy C++'s stricter typing rules.

2011-07-23    <Jim@X64PC>

        * QtSpim/menu.cpp (help_AboutSPIM) [Sergio Barrachina Mir <barrachi@icc.uji.es>]:
        Improve the About QtSpim dialog.

        * QtSpim/regwin.cpp (changeValue):
        Suppress compiler warning.

        * QtSpim/QtSpim.pro:
        Generate compressed helpfile and help collection separately to
        work around bug in buildhelpcollection's -o argument.

2011-07-22    <Jim@X64PC>

        * Version 9.1.2

        * pervasive:
        Changed C code to use bool instead of int to make things clear,
        although no longer vanilla C code.

        * QtSpim/datawin.cpp [William A. Barrett wbarrett1076@comcast.net]:
        Fix data segment display to show ASCII chars on a partial line.
        Only display printable ASCII chars.


2011-07-21    <Jim@X64PC>

        * Version 9.1.1

        * QtSpim/console.cpp,   QtSpim/console.h, QtSpim/datatextedit.h,
        QtSpim/datawin.cpp, QtSpim/regtextedit.h,       QtSpim/regwin.cpp,
        QtSpim/spimview.cpp, QtSpim/spimview.ui, QtSpim/texttextedit.h,
        QtSpim/textwin.cpp [Mario H. Voorsluys m.h.voorsluys@student.tudelft.nl]:
        Closing a window did not uncheck item on Windows menu.
        Eliminated empty toolbar.

2011-07-20    <Jim@X64PC>

        * QtSpim/breakpoint.ui QtSpim/menu.cpp, QtSpim/spimview.h, QtSpim/spimview.cpp [William Barrett wbarrett1076@comcast.net]:
        Provide more usable set of options at a breakpoint.

2011-07-18    <Jim@X64PC>

        * Version 9.1

2011-07-18  Jim Larus  <jim@linuxPC>

        * Setup/qtspim_debian_deployment/postinst:
        Register QtSpim help file after installation.

2011-07-17    <Jim@X64PC>

        * Setup/QtSpim_Win_Deployment/QtSpim-package.sln:
        Fixed VS deployment package to register/unregister help file when
        installing on new machine.
        Added image rendering plugins for jpegs.

        * main.cpp, menu.cpp, spimview.cpp, spimview.h, state.cpp:
        Added command line parsing to QtSpim.

        * CPU/spim.h, PCSpim/ConsoleWnd.cpp, PCSpim/SpimSupport.cpp,
        QtSpim/console.cpp, QtSpim/console.h, QtSpim/spim_support.c,
        Tests/read.s, spim/spim.c, xspim/xspim.c,
        QtSpim/help/HP_AppA.html:
        Better document the behavior of the console window in both
        memory_mapped and regular mode. None of the simulators, beyond
        spim, yet allows editing in either mode. Eliminate inconsistently
        implemented control-c processing, except in spim simulator.

        * QtSpim/spimview.cpp (closeEvent) [Mario H. Voorsluys m.h.voorsluys@student.tudelft.nl]:
        Close console window when main QtSpim window closes.

2011-07-16    <Jim@X64PC>

        * QtSpim/state.cpp (readSettings):
        If the size of the restored window exceeds the current screen
        size, resize the window.

        * CPU/run.c (start_CP0_timer) [Ed Harcourt (edharcourt1)]:
        Clean up non-Windows timer code to not reset timer until it has
        expired. This behavior may have caused problems on Linux x64.

        * QtSpim/console.cpp, QtSpim/console.h, QtStpim/spim_support.c [Merlin Hansen (wasteofammo)]:
        Memory mapped IO was not fully implemented.

        * QtSpim/menu.cpp (sim_Run) [Merlin Hansen (wasteofammo)]:
        Reduced frequency of updating screen 100-fold to reduce the ~100
        slowdown relative to the console version.

2011-06-19    <Jim@X64PC>

        * QtSpim/Documentation/SourceForge [kevin.vermeer (kevin.vermeer)]:
        PDF files not uploaded to SourceForge.

        * QtSpim/datawin.cpp (formatMemoryContents) [Robert K. Moniot (moniot)]:
        Incorrect html dropped line break after run of zeros.

        * QtSpim/help/Fig7.1.jpg [William Barrett wbarrett1076@comcast.net]:
        Missing figure in help file: rename file from FIg7.1.jpg to
        Fig7.1.jpg since help tools are case sensitive.

        * QtSpim/regwin.cpp [William Barrett wbarrett1076@comcast.net]:
        Only printed out half of double precision FP registers.

        * QtSpim/spimview.ui [William Barrett wbarrett1076@comcast.net]
        Corrected misspelling in File menu item.

2011-06-19    <Jim@LS-RED>

        * QtSpim/savelogfile.ui: QtSpim/menu.cpp  [Kenneth Lodge klodge@csu.edu.au]:
        Writing log file failed because of change to class of underlying
        windows. Eliminated HTML mode and cleaned up dialog box.

2011-02-05    <Jim@LS-RED>

        * CPU/scanner.l, CPU/parser.y [David Hemmendinger hemmendd@union.edu]:
        Allow full arithmetic expressions in constant definitions.

        * QtSpim/menu.cpp [Dave Reed <dreed@capital.edu>]:
        Single stepping after hitting a breakpoint started at the
        beginning of the program.

2011-01-18    <Jim@LS-RED>

        * Documentation/SourceForge/readme.txt [Sergio Barrachina Mir <barrachi@icc.uji.es>]:
        Installed Mac OS X version of QtSpim.

2011-01-09    <Jim@X64PC>

        * Version 9.0.5 released:

        * QtSpim/README, QtSpim/datawin.cpp, QtSpim/menu.cpp,
        QtSpim/regtextedit.h, QtSpim/regwin.cpp, QtSpim/settings.ui,
        QtSpim/spimview.h, QtSpim/spimview.ui, QtSpim/state.cpp:
        Renamed st_intRegBase -> st_regDisplayBase and used base setting
        to display FP registers.
        Changed inconsistent use of QtSPIM -> QtSpim.
        Dropped octal display format for register and data.
        FP registers can be displayed in hex or binary.
        FP registers can be set.
        Right click to set register display format.
        Enhancement from setting registers also applied to data segment.

2011-01-08    <Jim@LS-RED>

        * Version 9.0.4 released:

        * QtSpim/QtSpim.pro, QtSpim/regtextedit.h, QtSpim/regwin.cpp,
        QtSpim/spimview.h, QtSpim/changevalue.ui [Mitko <asdfgga12@gmail.com>]:
        Set value of register as either a decimal or hexadecimal value.
        Fixed help file build for Windows.

2011-01-05    <Jim@LS-RED>

        * PCSpim_9.0.2.zip, PCSpim_9.0.3.zip:
        Icons for shortcut not properly set. Wrong installation banner.

2011-01-04    <Jim@LS-RED>

        * PCSpim_9.0.1.zip:
        New release to correct a bug in the deployment that included the
        debug rather than release binary, which conflicted with libraries.

2011-01-02    <Jim@X64PC>

        * Version 9.0.1 released:

        * QtSpim/menu.cpp:
        Update register display when single stepping.

        * QtSpim/datawin.cpp, QtSpim/menu.cpp, QtSpim/regwin.cpp, QtSpim/textwin.cpp:
        Scroll windows to top when reinitialized; otherwise leave at same place.

2011-01-01  Jim Larus  <jim@linuxPC>

        * Version 9.0 released:

        * Setup/qtspim_debian/depolyment/qtspim.desktop, bin/release-debain:
        Added Linux desktop entry and icon.

        * QtSpim/regwin.cpp, QtSpim/datawin.cpp, QtSpim/textwin.cpp,
        QtSpim/state.cpp:
        Leave windows scrolled to top as much as possible.

        * spim/Makefile, xspim/IMakefile:
        Changed directories to install spim and xspim in /usr/bin.

        * Setup/qtspim_debian_deployment, bin/release-debian, QtSpim/menu.cpp:
        Create debian package.

2010-12-30    <Jim@X64PC>

        * Moved SVN repository to SourceForge in preperation for hosting
        entire project at that site.

2010-12-30    <Jim@LS-RED>

        * PCSpim/PCSpimView.cpp [Lyosha Blinnikov <nookkin@gmail.com>]:
        Incorrectly parse file names containing spaces.

2010-12-29    <Jim@LS-RED>

        * PCSpim/pcspim.rc [Hauerwas, Adam <HAUERWAS@providence.edu>]:
        Field label did not fit string.

2010-11-26    <Jim@LS-RED>

        * QtSpim/help:
        Added Appendix A of Patterson & Hennessey as help file.

2010-11-21    <Jim@LS-RED>

        * QtSpim/menu.cpp, QtSpim/help:
        Added help file.

2010-11-05    <Jim@LS-RED>

        * QtSpim/regwin.cpp, QtSpim/QtSpim.pro, QtSpim/regtextedit.h,
        QtSpim/spimview.cpp, QtSpim/spimview.ui Mitko <asdfgga12@gmail.com>:
        Add right click to set register values.

2010-10-23    <Jim@LS-RED>

        * CPU/inst.c, CPU/inst.h, CPU/mem.c, CPU/run.c,
        QtSpim/datatextedit.h, QtSpim/datawin.cpp, QtSpim/menu.cpp,
        QtSpim/spim_support.c, QtSpim/spimview.cpp, QtSpim/spimview.h,
        QtSpim/spimview.ui, QtSpim/textwin.cpp, QtSpm/windows_images.qrc:
        Fixed debugger functionality by adding pause button.
        Sped up formating of data segments.
        Improved error messages.

2010-10-10    <Jim@LS-RED>

        * CPU/run.c, QtSpim/QtSpim.pro, QtSpim/README, QtSpim/spim_support.c, QtSpim/textwin.cpp
        Chris Van Horne <cwvh@email.arizona.edu>:
        Changes for Mac.

        * xspim/xspim.c, xspim/buttons.c:
        New internal interface.

        * PCSpim/PCSpimView.cpp:
        New internal interface.

        * spim/spim.c:
        New internal interface.

        * QtSpim/menu.cpp, QtSpim/spimview.ui:
        Improved handling of run/stop/single-step.

        * CPU/spim-utils.c, CPU/spim-utils.h CPU/spim.h:
        Simplify code for running a program.

2010-10-02    <Jim@LS-RED>

        * QtSpim/menu.cpp (executeProgram) Alexander Williams <proflogic@gmail.com>:
        Single step go hung up at breakpoint.

2010-09-18    <Jim@LS-RED>

        * CPU/display-utils.c J.P. Mellor <jpmellor@rose-hulman.edu>:
        Did not display full stack (artificially dropped first 4K).

2010-09-12    <Jim@LS-RED>

        * QtSpim/:
        Released QtSpim.0.9

2010-09-09    <Jim@X64PC>

        * PCSpim/:
        Ported PCSpim to Visual Studio 2010.
        Renamed VS configuration files to reflect version of VS (vs6,
        vs08, vs10).
        Compiled PCSpim for x64 processor on Windows.

2010-09-06    <Jim@X64PC>

        * spim/Makefile:
        Supress coercion chatter when compiling with gcc v4.

2010-09-03    <Jim@LS-RED>

        * spim/, xspim/, CPU:
        Eliminated the Configure / configuration file. Defaults work for
        most systems these days, so ports to "unusual" systems can change
        the parameters by setting the cpp defines manually in Makefiles.

2010-08-31    <Jim@LS-RED>

        * pervasive:
        Renamed defines LITTLENDIAN -> SPIM_LITTLENDIAN, BIGENDIAN ->
        SPIM_BIGENDIAN to avoid name classes with system .h files.

2010-07-27    <Jim@LS-RED>

        * CPU/{inst.c, parser.y, run.c, scanner.l, spim-utils.c,
        sym-tbl.c, syscall.c}, spim/{Makefile, spim.c}:
        Fix type errors so spim compiles as C++.

2010-07-21    <Jim@LS-RED>

        * CPU/version.h, CPU/spim-utils.c, spim/Makefile, xspim/Makefile,
        xspim/IMakefile, PCSpim/pcspim.vcproj:
        Move spim version information from file to CPU/version.h.

2010-01-23    <Jim@LS-RED>

        * CPU/endian.c:
        Added copyright notice.

2010-01-08    <Jim@LS-RED>

        * Version 8.0 released

2010-01-05    <Jim@LS-RED>

        * xspim/Imakefile, spim/Makefile Jaymie Strecker [JStrecker@wooster.edu]:
        Change install path from /usr to /usr/local.
        Removed -D option, which doesn't exists on MacOS.

        * pervasive:
        Change license to a BSD license, update copyright notices, and
        eliminated references to my old email address.

2009-12-05    <Jim@LS1>

        * CPU/spim-utils.c (initialize_run_stack) [이법재 bupjae@hotmail.com]:
        Simplify alignment of data on stack to ensure enough room is left
        for environment and args at top of stack.

        * PCSpim/PCSpimView.cpp:
        Initialize stack with arguments when running program from run dialog.

        * spim/spim.c (read_input) [Adam Wolfe Gordon
        adam.wolfegordon@gmail.com}:
        read_input filled buffer with last character of file not terminated by
        newline.

        * Documentation/spim.html [Dave Comer dmcomer@dmcmicro.com]:
        Links to MIPS documentation were broken.

2009-09-22    <Jim@LS1>

        * spim/spim.c (main) [Ohad Kammar ohad.kammar@ed.ac.uk]:
        Did not return value from exit syscall.

2009-03-01  James larus  <larus@ubuntu-laptop>

        * xspim/buttons.c [Karl Ljungkvist k.ljungkvist@gmail.com]:
        Step command reinitialized the stack, which changed registers (argc, argv).

2009-03-01    <Jim@LS1>

        * Documentation/spim.html:
        Updated web page to remove reference to spim source in PCSpim source distribution.

        * PCSpim/PCSpimView.{cpp, h}, SettingsDlg.cpp, BreakpointDlg.cpp, MainFrm.{cpp, h}:
        Force redisplay of data segment in situations in which register
        values may have changed, such as $sp. Some cleanup as well.

        * PCSpim/PCSpimView.cpp:
        Properly initialize the PC at the first invocation of the step operation.

        * PCSpim/PCSpimView.cpp, spim/spim.c [Pierce, Bill [pierce@hood.edu]:
        Initialize the stack when initializing the world, so the stack is
        initialized when single stepping as well as running.

2009-02-13    <Jim@LS1>

        * CPU/mem.c (bad_mem_write) [phong le phongle@nlsim.com]:
        Major memory leak: instructions overwritten by self-modifying code
        were not freed!

        * spim/Configure, xspim/Configure [Carlos Pantelides carlos_pantelides@yahoo.com]:
        Added test for 64 bit Linux systems.

2009-01-22    <Jim@LS1>

        * spim/Makefile:
        Fix install commands so exceptions.s is installed at /usr/lib/spim.
        Rerelease of spim.tar.*

2009-01-14    <Jim@LS1>

        * pcspim.zip:
        Rerelease of pcspim to correct installer problem. Visual Studio
        9.0 required new crt and mfc libraries.

2009-01-01    <Jim@LS1>

        * Released version 7.4

2009-01-01  James larus  <larus@ubuntu-laptop>

        * xspim/Imakefile, spim/Makefile:
        Fix install directories for Linux.

2008-11-29    <Jim@LS1>

        * xspim/buttons.c [karl.marklund@gmail.com]:
        Command line arguments for assembly code not properly set.

2008-11-28    <Jim@LS1>

        * PCSpim/PCSpimView.{cpp,h}:
        Command line arguments not set properly on second and subsequent runs.

2008-11-01    <Jim@LS1>

        * Version 7.4

        * Tests/tt.core.s (madd_) Miguel Barão [mjsb@di.uevora.pt]:
        Added test for madd(2, -1) with (hi, lo) = (0, -1).

2008-05-18    <Jim@LS1>

        * CPU/scanner.l [liblit@cs.wisc.edu]:
        Fix for flex 2.5.33 was too specific for that version and failed
        on later versions, which propagated the change recoganized by fix
        of2005-02-05.

2007-05-20    <Jim@LS1>

        * CPU/run.c (run_spim):
        Fixed handling of borrow from subtract of low-order word in MSUB
        and MSUBU

2007-05-03    <Jim@LS1>

        * CPU/run.c Tim ODonnell [timodonnell@gmail.com]:
        Fixed handling of overflow from add of low-order word in MADD and
        MADDU.

2007-04-15    <Jim@LS1>

        * Documentation/spim.html:
        Updated MIPS documenation links to reflect new file
        versions. Included link to Nokia 660 port.

2007-01-14    <Jim@LS1>

        * CPU/inst.c (inst_decode) Cai Hongxu [caihongxu@gmail.com]:
        Did not correctly decode SPECIAL2 instructions (e.g., madd).

2006-08-28    <Jim@LS1>

        * spim/Makefile:
        Explicitly include exception handler path for "make test" to
        eliminate need to install it before running test.

2006-08-26    <Jim@LS1>

        * Version 7.3

        * spim/Makefile, xspim/Imakefile:
        Fix installation process of man pages and make xspim compile under
        Cygwin. Do not install man page by default (too many different
        options).

2006-08-23    <Jim@LS1>

        * CPU/string-stream.c [Jeremy Huddleston
        jeremyhu@eecs.berkeley.edu]:
        Segfault in ss_printf caused by incorrect usage of va_ interface
        when string overflows and needs to be reallocated.

        * xspim/xspim.c, spim/spim.c [Jeremy Huddleston
        jeremyhu@eecs.berkeley.edu]:
        Read SPIM_EXCEPTION_HANDLER environment variable.

2006-08-20    <Jim@LS1>

        * CPU/scanner.l [many xspim bugs on Linux]:
        flex 2.5.33 changed the polarity of the yy_init flag without
        providing a backwardly compatible way of setting it (sigh).

        * spim-utils.c [Jeremy Huddleston jeremyhu@berkeley.edu]:
        Allow a semicolon deliminated list of exception files, rather than
        just a single file.

        * parser.y [Piotr Bieganowski bieganow@wsisiz.edu.pl]:
        Memory corruption caused spim to crash when a label was defined
        twice in succession.

2006-08-19    <Jim@LS1>

        * PCSPimView.cpp:
        Update register and memory display even after a parse error when
        reading a file.

        * parser.y, scanner.{h, l} [Jordi Ferrer Plana jferrerp@eia.udg.es]:
        Added unnecessary null character between items in a list of
        strings from .asciiz.

2005-11-25    <Jim@LS1>

        * xspim/Imakefile, spim/Makefile [Johannes Grassler
        johannes.grassler@freenet.de]:
        Fix paths for installing exception.s.

2005-08-28    <Jim@LS1>

        * Documentation/TeX/spim.tex:
        Change psfig -> epsfig.

        * SPIM 7.2.1 Released

        * spim.c:
        Translate CR -> NL on console input and echo CR following NL on
        console output (to make IO consistent across all three platforms).

        * spim.c:
        Did not properly set console flags when passing console to program.

        * xspim.c:
        Fixed handling of carriage return and modifier keys in xspim
        memory mapped IO.

        * xspim.c:
        Do not ignore trailing filename argument to xspim.

        * {spim,xspim}/Configure:
        Use the "env" command to invoke bash, so pathname is not hardwired
        into shell script (eg for Solaris).

2005-08-07    <Jim@LS1>

        * SPIM 7.2 Released

        * README spim/Makfile
        General cleanup of documentation in README files.
        Eliminated Makefile.Cygwin in spim directory in favor of single
        file that worked on Unix and Cygwin.

2005-07-25    <Jim@LS1>

        * CPU/sym-tbl.c (resolve_a_label_sub) [Vegdahl, Steven vegdahl@up.edu]:
        Did not add 1 to upper 16 bits of LW/SW pair (to compensate for
        signed add in instruction) when there was an ADDU instruction
        between the LUI and LW/SW, due to an indexed address compuation.

2005-06-04    <Jim@LS1>

        * spim/spim.c (console_to_program) [Peter Fröhlich phf@cs.ucr.edu]:
        Eliminated non-POSIX flags IUCLC and IXANY to facilitate port to
        Mac OS X.

        * spim/spim.c (console_to_program) [Deborah Pickett
        debbiep@csse.monash.edu.au]:
        Use termios(3) library calls instead of IOCTLs to fix bug
        introduced in port from termio to termios struct (did not change
        TCGETA -> TCGETS and TCSETA -> TCSETS, since the latter does not
        exist in Cygwin).

        * Tests/tt.core.s (jalr_):
        Test default case for jalr, without default $rd (=31).

        * Tests/tt.io.s blair bethwaite [blair.bethwaite@gmail.com]:
        Trap handle in test extracted wrong bits from ExcCode field of
        Cause register.

2005-05-31    <Jim@LS1>

        * Pervasive restructuring of files to put 3 UIs (spim, xspim,
        PCSpim) in separate directories and cleanup organization and
        makefiles.

2005-02-12    <Jim@LS1>

        * PCSpim:
        Use correct help file in install process.

2005-02-05    <Jim@LS1>

        * scanner.l [Joe Pfeiffer pfeiffer@cs.nmsu.edu]:
        Added work-around for bug in 2.5.31 that left yytext_ptr undefined.

        * exceptions.s [Herman Harrison herman.harrison@utdallas.edu]:
        Restore epilogue code restored $at then used pseduo instructions
        that smashed it.

        * PCSpimView.{cpp,h}
        Cleared filename when reinitializing simulator, which broke next
        reload command.

2005-01-10    <Jim@LS1>

        * Repackage and rerelease PCSpim_7.1.zip to include mfc71.dll and
        msvc71.dll, which weren't originally included.

2005-01-02    <Jim@LS1>

        * Version 7.1 released.

        * Switched Windows installer to Microsoft .msi installer, instead
        of InstallShield.

        * exceptions.s [Pervin, William J pervin@utdallas.edu]:
        Masked exception code with 4 bit (not 5 bit) mask.

2004-11-27    <Jim@LS1>

        * mem.c inst.h (check_memory_mapped_IO) [Deborah debbiep@csse.monash.edu.au]:
        Clearing the transmitter or receiver interrupt enable bits also
        clear interrupt pending bits in Cause register. Transmitter and
        receiver interrupt enable bits now operate properly (ie prevent
        interrupts when cleared).

2004-11-26    <Jim@LS1>

        * xspim.c (console_input_available) [Daniel Stearns dstearns@csc.calpoly.edu]:
        Code to poll for a console input character in X windows blocked and
        prevented any output until input occured.

2004-11-23    <Jim@LS1>

        * exceptions.s (__excp) [pwhite@mailhaven.com]:
        Correct typos in comments

2004-11-13    <Jim@LS1>

        * op.h [lau@det.ua.pt]:
        Type of "mul" instruction was wrong, which lead to it being
        printed without destination register.

2004-10-19    <Jim@LS1>

        * inst.c (inst_decode):
        Do not printf with format string from user input (comment).

2004-10-18    <Jim@LS1>

        * inst.c (format_an_inst):
        Do not print breakpoint instruction. Instead, print underlying instruction.

        * PCSpimView.cpp:
        Do not single step when PC = 0;

        * spim-utils.c, spim.c:
        Clean up stack initialization code.

        * spim-utils.c:
        Change R[29] -> R[REG_SP].

2004-09-28    <Jim@LS1>

        * op.h:
        Table had same opcode for beq and beql, which caused unparing
        error that unparsed beq as beql.

2004-09-26    <Jim@LS1>

        * spim.c, Configure:
        Eliminated dependence on obsolete termio.h in favor of posix
        termios.h since Mac OS X doesn't have termio.h any more.

2004-09-21    <Jim@LS1>

        * PCSpimView.cpp:
        Fix null pointer problem if no entries in registry.

        * spim-utils.c [J.P. Mellor [jpmellor@rose-hulman.edu]]:
        Turn off EXL bit after break instruction, since break is handled by
        SPIM, not MIPS, code and the bit was never getting cleared.

        * Move to VC7.0 (Visual Studio.NET).

2004-09-12    <larus@HomeMachine>

        * Released SPIM 7.0b (on Windows) to propagate changes.

        * PCSpimView.cpp:
        Set default path for exceptions.s to C:\Program Files\PCSpim, the
        default installation directory.

2004-09-04    <larus@HomeMachine>

        * Tests/tt.core.s:
        Test for SQRT.S used double constant, which failed on SPARC (but
        not x86).

2004-08-22    <larus@HomeMachine>

        * Released SPIM 7.0a to propagate changes.

        * Updated spim.html with new COD files.

        * Makefile, Imakefile, Makefile.std:
        Eliminate dependence in syscall.o on spim-syscall.h.

2004-07-11    <larus@HomeMachine>

        * Makefile [Michael L. Miller [mmiller2@terpalum.umd.edu]]:
        Regenerated with updated Imakefile, to reflect file name changes.

2004-07-07    <larus@HomeMachine>

        * Released SPIM 7.0

        * string-stream.c:
        Fix off-by-one errors null terminating strings.

        * data.c (lcomm_directive) Philipp Lucas [phlucas@cs.uni-sb.de]:
        Fix implementation of .lcomm

2004-06-27    <larus@HomeMachine>

        * parser.y [Philipp Lucas [phlucas@cs.uni-sb.de]]:
        Freed wrong YACC variable in .comm and .label.

2004-06-05    <larus@HomeMachine>

        * PCSpim:
        Add Solution for building PCSpim with VC7 (PCSpim.VC7).

        * op.h [Dave]:
        Modified some FP opcodes to correct values.

2004-05-08    <larus@HomeMachine>

        * spim.c, xspim.c:
        Removed unused variable cycle_level.

2004-05-02    <larus@HomeMachine>

        * MainFrame.{cpp,h}, PCSpimView.{cpp,h}:
        Fixed updating of status line in PCSpim to conform to MFC convention

2004-04-24    <larus@HomeMachine>

        * parser.y run.c op.h:
        Changed MUL instruction from pseduo op to actual instruction.
        Fixed encoding of several instructions to correspond to hardware.

2004-03-28    <larus@HomeMachine>

        * run.c:
        Changed CP0 timer to poll on Unix, since signals interrupt system
        calls and affect SPIM's I/O.

2004-03-25    <larus@HomeMachine>

        * display-utils.c, xspim.c windows.c:
        Made X interfaces a bit more compact and regular. Works on a
        1024x768 screen.

2004-03-22    <larus@HomeMachine>

        * parser.y [Margaret M Reek [mmr@cs.rit.edu]]:
        Add, rather than subtract, in expression: imm - imm.

2004-03-21    <larus@HomeMachine>

        * pervasive:
        Cleaned up splint warnings.
        Replaced sprintf calls with str-stream abstraction.

2004-03-12    <larus@HomeMachine>

        * pervasive:
        Renamed "trap" to "exception" to reflect MIPS terminology.
        Renamed trap.handler to exceptions.s.

        * inst.c inst.h parser.y run.c:
        Fix internal representation of instructions by separating FS from
        RS field and moving it RD and RD to SHAMT.

        * scanner.l [Akim Demaille <akim@epita.fr>]:
        Improve handling of escape sequence in strings to bring it close
        to ISO C strings.

        * spim.c:
        Introduced short command line arguments.
        Assumed first argument not starting with '-' is file name.

        * inst.h mem.c mem.h reg.h run.c spim-utils.c spim.c spim.h
        tt.io.s:
        Fixed implementation of console IO.
        Ensure that interrupts occur before instruction execution (and
        other exceptions afterwards), so that EPC points to instruciton to
        restart.

2004-03-11    <larus@HomeMachine>

        * mips-syscall.{c,h} spim-sycall.h syscall.{c,h}
        Moved all syscall-related stuff to syscall.{c,h} and eliminated
        old #ifdef'ed stuff related to syscalls from binary code running
        on DECstations.

2004-03-10    <larus@HomeMachine>

        * Changed memory access macros to functions.

2004-03-06    <larus@HomeMachine>

        * prevasive:
        Implemented MIPS32 instruction set.
        Eliminated coprocessor 3.
        Made coprocessor 2 operations raise coprocessor unimplemented trap
        (CpU).
        Modified exceptions and interrupts to conform to MIPS32 (ex when
        compiled -DMIPS1).
        Added CP0 timer.
        Fixed trap.handler to work with MIPS32 exceptions.

2004-02-19    <larus@HomeMachine>

        * inst.c inst.h spim-utils.c:
        Sorted instruction tables in advance, rather than on first use.

2004-02-16    <larus@HomeMachine>

        * PCSpimView.cpp [Domenico G. Sorrenti (sorrenti@disco.unimib.it)]:
        Add prompt to ask user whether to reinitialize on reloading a file.

2004-02-15    <larus@HomeMachine>

        * MainFrm.cpp MainFrm.h PCSpim.cpp PCSpimView.cpp PCSpimView.h
        [Matthew Low (mlow@imail.EECS.Berkeley.edu)]:
        Added menu item to set font in PCSpim.

        * Documentation/spim.tex [Deborah Ariel Pickett
        (debbiep@mail.csse.monash.edu.au)]:
        Updated documentation to reflect changes to command line options
        and new syscalls.

        * pervasive:
        Eliminated #ifdef __STDC__. Everyone must have a non-K&R compiler
        by now.

        * mem.c [Akim Demaille (akim@epita.fr)]:
        Word align all segments, in particular, ensure that sbrk returns
        word-aligned addresses.

        * mips-syscall.c spim-syscall.h spim.c xspim.c spim.h
        SpimSupport.cpp [Akim Demaille (akim@epita.fr)]:
        Added new syscall (EXIT2_SYSCALL) that takes argument that is
        passed to spim's exit() call.

        * sym-tbl.c [Matt Harren (math@cs.berkeley.edu)]:
        Copied garbage byte after name of undefined symbols.

        * scanner.l [Vishal jain (vishalsj@yahoo.com)]:
        Old lex does not use yy_hold_char variable, so ifdef out reference.

        * spim.c [Matt Harren (math@cs.berkeley.edu)]:
        Handle boundary case for -file without name.

2004-02-14    <larus@HomeMachine>

        * run.c [Bob Britton (BBritton@csuchico.edu)]:
        Correctly implement delayed load instructions. (Nobody ever use
        them before?)

        * parser.y:
        Record labels on line with syntax error.

        * scanner.l [P. Augustyniak silvathraec@rpg.pl]:
        Added \ooo constants to strings.

        * mips-syscall.c [Shaunak Pawagi (shaunak@cs.sunysb.edu)]:
        Only print 8 digits for single precision floats.

        * spim.html [Shaunak Pawagi (shaunak@cs.sunysb.edu)]:
        Correct -delayed-branches and -delayed-loads to -delayed_branches
        and -delayed_loads.

        * spim.c [Jos Hulzink (josh@stack.nl)]:
        Incorrect ifdef around vprintf.

        * spim.c [Marvin Solomon (solomon@cs.wisc.edu)]:
        Core dumped when passed one argument.

        * run.c tt.core.s [Marvin Solomon (solomon@cs.wisc.edu)]:
        Change to test for overflow in integer divide was backwards and
        nullified all divides by -1.

        * Configure [Russell D. Meier (meier@msoe.edu)]:
        Removed the -traditional-cpp flag from MacOSX. (It appears that
        the semantics of this flag have changed and now break spim.)

        * Configure Imakefile Makefile.cygwin Makefile.std Tests/tt.le.s
        Tests/tt.be.s Tests/tt.core.s Tests/tt.core.OK Tests/tt.endian.OK:
        Factored torture tests into endian-indpendent and endian-dependent
        pieces.

2003-01-04    <larus@HomeMachine>

        * Version 6.5 released.

        * spim.c PCSpimView.cpp:
        If started with only one argument, assume it is a file
        name. [Armin Mueller [arm.in@web.de]]

        * :
        Added Alt-F4 shortcut to PCSpim.

        * trap.handler:
        Return to instruction at EPC on interrupt. Comment code
        better. [Nuno Lau [lau@det.ua.pt]]

        * spim.c:
        Partioned print_reg into 3 cases, to avoid casting int to char* on
        64 bit machine. [Ken Swarner [kswarner@siena.edu]]

        * spim.html:
        Cleaned up file and added installation instructions.

2003-01-03    <larus@HomeMachine>

        * README:
        Typo in README. [Ian Langworth [bass@ccs.neu.edu]]

2003-01-01    <larus@HomeMachine>

        * run.c:
        Got (real!) hardware exception on integer overflow in
        division. [Deborah Ariel Pickett [debbiep@mail.csse.monash.edu.au]]

        * xspim.c:
        -trap_file did not properly parse argument in xspim. [From:
        William Waite [William.Waite@Colorado.EDU]]

        * scanner.l:
        Fixed printing of error on last line without a carriage
        return. [Max Hailperin [max@gac.edu]]

        * display-utils.c:
        Print proper registers when printing hex FP numbers. [Armin
        Mueller [arm.in@web.de]]

        * mem.c:
        Properly zero newly allocated memory. [Guillaume Melquiond
        [gmelquio@ens-lyon.fr], Bill Siever [bsiever@umr.edu, Diego Billi
        [dbilli@CS.UniBO.IT], Alberto Montresor [montreso@cs.unibo.it],
        Max Gilbert [max@ebs330.eb.uah.edu]] Konrad Rymuza [zeljko@wp.pl]

        * SettingsDlg.cpp:
        Set delayed branch & load check box when bare check box is
        checked. [Marco Cova [mcova@umail.ucsb.edu]]

        * trap.handler:
        Added nops (addu $0, $0, 0) to trap handler, so that it works
        properly in bare mode! [Marco Cova [mcova@umail.ucsb.edu]]

        * sym-tbl.c:
        Avoid null ref when there is no instruction in memory before a
        load instruction. [Steven Borkman [borkman@cse.Buffalo.EDU]]

        * spim.html:
        Removed reference to spimwin.ps since file disappeared (.pdf
        remains) [hemmendd@athena.union.edu]

        * PCSPIM.HLP:
        File was corrupted.

2002-01-12    <larus@HomeMachine>

        * Release SPIM 6.4a

        * spim.html:
        Update with latest info.

        * mips-syscall.c:
        Use unix read/write/open/close not just windows
        _read/_write/_open/_close.

        * xspim.h xspim.c:
        Bad function prototypes.

2002-01-01    <larus@HomeMachine>

        * Release SPIM 6.4

        * PCSpimView.cpp:
        Ensure that register and data segment windows do not shift focus
        when underlying values change.  [Vollmar, Kenneth R
        krv133f@smsu.edu]

        * parser.y tt.le.s:
        Fixed translation of USH to eliminate side-effect and warning.

        * mips-syscall.c:
        Eliminated compiler warnings at high warning level.

        * mips-syscall.c spim-syscall.h:
        Added open/close read/write system calls. [Doug Johnson
        djohnson@cs.washington.edu]

        * Configure:
        Added entries for Mac OSX. [Jeffrey Naset jeff@naset.net]

2001-12-24    <larus@HomeMachine>

        * parser.y:
        Translation of USH pseudo-op used register $1 twice, which didn't
        work. Changed it so it modifies its first argument instead (and
        issued warning of side effect).

        * PCSpimView.cpp:
        Report parser warnings distinct from errors.

        * parser.y:
        REM pseudo-op requires 3 arguments. [Rigel rigelf@angelfire.com]

        * ConsoleWnd.h:
        Return window's content as a string so it can be dumped to a
        file. [Bill Siever bsiever@umr.edu]

        * parser.y inst.h tt.le.s tt.be.s:
        Make LUI's immediate unsigned (since it is not sign
        extended). [Georgia Grant grantg@pacbell.net]

        * SpimSupport.cpp:
        Check that buffer in read_input is not null and that size is
        reasonable. [ webmaster.it@libero.it]

        * scanner.l:
        Buffer overrun when handling bad input terminated by EOF rather
        than \nl. [Max Hailperin max@gac.edu]

        * spim-utils.c:
        Symbol "main" was not marked as global in the symbol table. [From:
        J. P. Mellor jpmellor@rose-hulman.edu]

        * mem.c:
        Zero newly allocated data byte-by-byte, to avoid zapping data in
        last word of non-word aligned data area. [Peter Gammie
        peteg@cse.unsw.edu.au]

        * scanner.l:
        Properly handle characters overwritten by null in scanner when
        looking for the end of the current line.  [From:
        Cary.G.Gray@wheaton.edu]

        * sym-tbl.c tt.le.s tt.be.s:
        Did not properly check that high-order 4 bits in jump
        instruction's PC match corresponding bits in target instruction's
        PC.

        * parser.y:
        Eliminated reduce/reduce conflict in div instruction.

        * Makefile.cygwin:
        Added -g flag. Changed from yacc to bison. Changed "diff" to "diff
        -w" to ignore cr/lf differences.

2001-02-08    <larus@HomeMachine>

        * parser.y:
        Did not handle rem pseudo op properly, which caused a fatal error
        or core dump. [Rigel Freden]

2001-02-01    <larus@HomeMachine>

        * spim.c spim.h trap.handler:
        Added commands to dump text segment (in binary). [Brian
        R. Gaeke brg@pasteur.EECS.Berkeley.EDU]

        * buttons.c:
        Allow character literal in set-value dialog box. [Brian
        R. Gaeke brg@pasteur.EECS.Berkeley.EDU]

        * mips-syscall.c spim-syscall.h Documentation\spim.tex:
        Added system call to print a character and read a character.
        [Brian R. Gaeke brg@pasteur.EECS.Berkeley.EDU]

        * xspim.c xspim.h buttons.c:
        Add button to clear xspim console. [Brian R. Gaeke
        brg@pasteur.EECS.Berkeley.EDU].

2001-01-14    <larus@HomeMachine>

        * spim.c:
        Fix print_all_regs to define the stack allocated buffer's length
        as a constant, not a variable.  This wasn't ANSI C and upset Sun's
        compiler. [Matt.Simmons@eng.sun.com]

2000-12-25    <larus@HomeMachine>

        * Release 6.3.

        * IMakefile, Makefile.cygwin Makefile.st:
        Rename SH to CSH.

2000-12-24    <larus@HomeMachine>

        * Makefile.std:
        Set defaults to work under Linux.

2000-12-23    <larus@HomeMachine>

        * MainFrm.cpp MainFrm.cpp PCSpim.cpp:
        When frame resized, resize panes.

2000-12-22    <larus@HomeMachine>

        * PCView.cpp:
        Refresh all windows before initialization finished when user had
        to respecify trap handler location through dialog box.

        * Makefile.cygwin:
        Remove .exe files.

        * scanner.l:
        Ignore carrage returns in input files.

        * Imakefile:
        Explicitly set SH=csh, since stderr redirection does not work in sh.

2000-12-10    <larus@HomeMachine>

        * xspim.man:
        Missing quotes screwed up formatting. [Robert Greenfield
        (rhg@gpfn.sk.ca)]

        * scanner.l (source_line):
        Include comments from source in SPIM comments. [John Bruce
        Zuckerman (johnz@cs.tamu.edu)]

        * mem.c (bad_mem_read):
        Printing of instruction bits failed when no instruction at
        address. [John Bruce Zuckerman (johnz@cs.tamu.edu)]

        * spim.h display-utils.c mips-syscall.c run.c:
        Handle display of stack better when $sp points to non-word
        boundary. [Matt Simmons, (simmonmt@eng.sun.com)]

        * parser.y:
        Change generated NOP to sll $0, $0, 0 to be consistent. [From:
        Robert Greenfield (rhg@gpfn.sk.ca)]

        * inst.c (i_type_inst_full_word and resolve_a_label_sub):
        Sign-extension fixup code for high 16 bits of lw/sw added fixup
        twice into instruction immediate field. [Robert Greenfield
        (rhg@gpfn.sk.ca) and Christian R Ward]

        (produce_immediate):
        Missed optimization of loading immediate with zero high 16
        bits. [Robert Greenfield (rhg@gpfn.sk.ca) and Christian R
        Ward]

2000-12-07    <larus@HomeMachine>

        * sys-table.c (resolve_a_label_sub):
        Correct binary encoding of negative offsets in branch instructions
        (high 2 bits were 0). [Jim Frenzel (jfrenzel@uidaho.edu) and
        others]

        * mips-syscall.c (do_syscall)
        Print single and double precision registers to up to 18 digits,
        not default 6 digits of precision. [PIERCE@hood.edu]

2000-12-06    <larus@HomeMachine>

        * spim.c (print_all_regs):
        Added spim command to print all registers. [Linus Akerlund]

2000-12-05    <larus@HomeMachine>

        * Tests/tt.le.s Tests/tt.be.s:
        Fix regression tests to work with stricter parser and changes to spim.

        * Makefile.std Imakefile:
        Change "csh" to an environment variable so shell can be changed.

        * spim.c (console_input_available):
        Comment out code to compile spim under cygwin on windows.

        * spim-utils.c (read_assembly_file):
        Open file as text (for windows).

        * run.c (run_spim):
        LWL failed with gcc (cygwin) because missing parens screwed
        associativity.

2000-12-04    <larus@HomeMachine>

        * parser.y scanner.l inst.h tt.be.s tt.le.s
        Validate range of immediate values in non-pseudo instruction and
        warn if too large. [David Kessner davidk@peakaudio.com]

Mon Jan 11 23:53:33 1999  James Larus  <larus@breeze.cs.wisc.edu>

        * tt.be.s tt.le.s:
        New tests from PC port.

        * parser.y scanner.l inst.c:
        New EOF code did not work with bison, which does not allow a
        non-terminal with the value 0.

1999-01-07  Jim Larus  <larus@drh-alpha.dns.microsoft.com>

        * spim.c xspim.c:
        Report undefined symbols before running program.

1998-12-16    <larus@HomeMachine>

        * Pervasive:
        Update copyright.

1998-12-14    <larus@HomeMachine>

        * parser.y:
        Allow pseudo ops with -pseudo flg.

        * parser.y parser.h sym-tbl.c spim.h spim-utils.c sym-tbl.h
        Test/tt.be.s:
        Bogus main undefined error if parser failed before main.

        * mem.c:
        Shift was incorrect.

        * spim.h:
        Redefine 1000K as K * K.

1998-12-14    <larus@HomeMachine>

        * mem.c:
        Force redraw of screen after updating text/data in bad address
        handler.

        * sym-tbl.c:
        Did not adjust high 16 bits in forward ref to symbol in LW/ST
        inststruction.

        * mips-syscal.c:
        Force redisplay of data segment after readining string or sbrk.

1998-12-14    <larus@HomeMachine>

        * display-utils.c:
        Change floating point format to increase precision and always
        print decimal point.

1998-12-13    <larus@HomeMachine>

        * inst.{c,h} spim.h run.c:
        Negative branch displacements handled inconsistently (shift
        before/after sign extend).

1998-12-07    <larus@HomeMachine>

        * spim-utils.c sym-tbl.c parser.y:
        Predefine main as global.  Fix symbol table initialization.

        * spim.c sym-tbl.{c,h} display-utils.c PCSpim.rc PCSpimView.cpp
        resourc.h RunDlg.cpp RunDlg.h SettingsDlg.cpp SpimReg.h:
        Print undefined symbols before running program.

1998-12-05    <larus@HomeMachine>

        * parser.y:
        Last line was not parsed if it did not end with newline.

1998-12-02    <larus@HomeMachine>

        * pcspim.ncb pcspim.dsp pcspim.plg pcspim.opt lex.yy.c parser.y:
        Invoke yacc and lex from within VS.

1998-12-01    <larus@HomeMachine>

        * pcspim.dsp pcspim.opt PCSpimView.cpp pcspim.plg xspim.c
        spim-utils.h display-utils.h:
        Share common code for formating machine contents.

1998-11-22    <larus@HomeMachine>

        * pcspim.dsp PCSpim.clw PCSpim.aps MakeHelp.bat PCSpim.hpj
        pcspim.plg pcspim.opt pcspim.ncb:
        Fix helfile compile.

        * pcspim.plg PCSPIMView.cpp:
        Default printing FP registers to FP format.

        * pcspim.dsp pcspim.plg pcspim.opt mem.c inst.h inst.c sym-tbl.c
        scanner.l:
        Eliminated warnings from VC6.0 at level 4.

Wed Jan 14 14:46:10 1998  James Larus  <larus@breeze.cs.wisc.edu>

        * run.c mem.c inst.c data.c:
        Eliminate warnings from VC5.0.

        * run.c spim-utils.c spim.c:
        Minor changes from David Curley's DOS port.

Tue Dec 30 12:17:11 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * README:
        Clarify installation instructions. [Deborah Bennett
        <deborah@cisco.com>]

        * Imakefile:
        Make Imakefile and Makefile.std writable before tar'ing. [From:
        Deborah Bennett <deborah@cisco.com>]

        * Configure:
        Added CC environment variable to allow selection of
        compiler. [Deborah Bennett <deborah@cisco.com>]

        * scanner.l:
        Reverse includes for Debian Linux. [Bennet Yee
        <bsy@play.ucsd.edu>]

        * parser.y:
        Fix parser so that label: <syntax error> did not cause parser to
        skip the rest of input. [Bennet Yee <bsy@play.ucsd.edu>]

        * spim.c (print_reg):
        Change format for printing FP registers to %g (from %f) so all
        bits are displayed. ["Jason Baumbach"
        <baumbajg@flyernet.udayton.edu>]

        * inst.c (i_type_inst):
        Operands between 2^15 and 2^16 to immediate instructions (eg addi)
        were treated as negative (signed) numbers. [From:
        jamie@cs.monash.edu.au (Jamie Scuglia)]

Wed Dec  3 14:15:35 1997  James Larus  <larus@butch.cs.wisc.edu>

        * spim.c (write_output):
        Could flush wrong file with bad descriptor.

Sat Nov 29 17:16:35 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * mem.h:
        Fix declarations in MEM_ADDRESS (changed for Alpha) that broke old
        (pre-ANSI) Sun compiler. [Laura Spoldi <laura@txc.com>]

Mon Nov 10 10:34:53 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * Documentation/spim.tex:
        Document that registers are 32-bits with. [William Waite  <waite@scotty.cs.colorado.edu>]

Mon Oct 20 15:09:34 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * Makefile.std:
        Added memory size and other defines back to default makefile.

Mon Jul 21 13:12:00 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * Version 6.0 released.

        * BLURB run.c spim-utils.c sym-tbl.c:
        Changes by DAC.

Wed Jul  9 09:00:41 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * Imakefile Makefile.std buttons.c inst. hmem.c mips-syscall.c
        reg.h spim-utils.c spim.c spim.h sym-tbl.c xspim.c xspim.h:
        Eliminate the cl-spim code since I don't want to support it and it
        will not run on the PCs.

        * buttons.c data.c inst.c mem.c mips-syscall.c spim-utils.c spim.c
        sym-tbl.c windows.c xspim.c inst.h mem.h reg.h scanner.h spim.h
        parser.y scanner.l:
        Changes for DEC Alpha systems. [Robert Moniot
        <moniot@dsm.fordham.edu>]

        * spim.c xspim.c:
        The flag -trap_file implies -trap.

        * Imakefile Makefile.std README buttons.c cl-cycle.c data.c
        mips-syscall.c run.c spim-utils.c spim.c xspim.c:
        Eliminate code to read MIPS a.out executable (where can you get
        them anyways)?

        * buttons.c spim-utils.c spim.c xspim.h Makefile.std Imakefile
        spim-utils.h:
        Clean up trap file loading.

        * prevasive:
        Clean up copyright notices.

        * dosnames.txt makefile.dos:
        Files to compile SPIM on DOS.

Tue Jul  8 17:32:55 1997  James Larus  <larus@breeze.cs.wisc.edu>

        * mips_syscall.c run.c spim-utils.c spim.c spim.h:
        Changes to port code to PCs. ["David A. Carley"
        <dac@cs.wisc.edu>]

        * inst.h:
        Eliminate redundant declarations of k_text_begins_at_point. [From:
        "David A. Carley" <dac@cs.wisc.edu>]


Wed Feb 12 12:29:03 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * reg.h xspim.c:
        Allow 32 single precision FP registers.

Fri Jan 17 08:54:44 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * Version 5.9 released.

        * spim.tex:
        Change document to have $sp point at last word of stack frame,
        instead of first free word no stack (no code changes).

Wed Jan  8 14:08:44 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * inst.c:
        Change of 12/16 included NULL in lines.

Tue Jan  7 17:24:32 1997  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * scanner.l spim.c spim-utils.c xspim.c spim.h:
        Added -pseudo/-nopseudo flag.

Mon Dec 16 13:22:47 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * inst.c:
        Fix printing of long lines (due to long symbols). [From:
        "William M. Waite" <waite@snag.cs.colorado.edu>]

Thu Dec  5 15:39:01 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * Documentation/spim.tex:
        Improved documentation of div/divu to emphasis that divu is
        unsigned and that overflow testing only occurs with 3 argument
        pseudo-op. [Susan]

Mon Nov 11 08:47:16 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * xspim.c:
        Fixed highlighting of selected line while single stepping! [From:
        "William M. Waite" <waite@snag.cs.colorado.edu>]

Fri Oct  4 14:19:23 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * mem.c (print_mem):
        Word-align address before printing memory. [From:
        anderson@spelman.edu (Scott D. Anderson)]

Fri Sep 20 15:40:33 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * spim.c xspim.c:
        read_input did not consistently or correctly handle input when
        buffer was of length 1. [Ron Van Cleave
        <ronvc@hppmorvc.sc.hp.com>]

Thu Apr 11 09:04:51 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * Imakefile:
        Fix usage of -lm flag. [David Thompson <thomas@cs.wisc.edu>]

Fri Jan  5 12:57:09 1996  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * Version 5.8 released.

        * parser.y:
        Do not clear the labels at start of a line, only after a line with
        content, so that parser allows blank line between label and
        directive. [Fischer & student.]

Fri Oct 13 08:27:53 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * parser.y:
        Translation of shift immediate (sll) to shift variable (sllv)
        missed that arguments to constructor are reversed. [From:
        jepler@herbie.unl.edu]

Tue Oct 10 13:06:09 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * parser.y:
        la $4,3 produced incorrect code. [jepler@herbie.unl.edu]

Fri Aug 25 09:19:38 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * buttons.c cl-cycle.c cl-except.{c,h} inst.c mem.{c,h} reg.h
        spim-utils.c spim.c xspim.c:
        Many cleanups for SGI. ["Peter Jacobson" <jacob@cs.umu.se>]

Thu Aug 17 08:33:19 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * Many changes to spim from: [Piers Lauder, piers@staff.cs.su.oz.au]

        * button.c mem.c:
        Added reload button.

        * button.c spim-utils.c:
        Generalized input to accept decimal values as well.

        * inst.c:
        Cleanup of instruction line disassembly formating.

        * op.h:
        Instruction format for sllv was wrong.

        * spim.c:
        Fix terminal set up for raw input.

        * xspim.c:
        Fixed display format a bit.

Tue Aug 15 11:51:11 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * Version 5.7 released.

Tue Aug 15 11:02:02 1995  James Larus  <larus@fool.cs.wisc.edu>

        * mips-syscall.c:
        The constant OPEN_MAX is ifdef'ed out of limits.h on Ultrix!

Tue Aug 15 09:47:27 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * trap.handler:
        Ignore (instead of terminating) unaligned instruction addresses,
        so that regress test works.
        * Imakefile Makefile.std:
        Add additional test that installed trap.handler is current, since
        torture test fails with old trap handler.

Fri Aug 11 15:29:43 1995  James Larus  <larus@breeze.cs.wisc.edu (James Larus)>

        * mem.c trap.handler:
        Better error message on jump out of text segment to bogus
        address. [From: hk@odo.bercos.de]

Tue Feb 21 17:24:49 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * spim.tex:
        Change the documentation to pop a stack frame by adding to the
        $sp. [jepler@herbie.unl.edu]

Wed Feb  1 16:58:10 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * Configure mips-syscall.c read-aout.c spim-utils.c:
        Change ifdef's so SPIM compiles on SGI boxes.  The binary file
        execution does not work because of system call and executable
        format differences. [Charles Daniel <manager@cse.unl.edu>]

Fri Jan 27 17:14:43 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * Imakefile:
        Added second colon to keep GNU make happy on output of
        xmkmf. [Robert  Wieda <rw42@columbia.edu>]

Wed Jan 18 09:38:29 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * Version 5.6 rereleased.

        * tt.le.s tt.be.s:
        Eliminated references off $sp to make verification of output
        easier since change of 11/21 put the environment on the stack so
        that the initial value of $sp dependend on the user's environment.

Fri Jan 13 12:37:19 1995  James Larus  <larus@breeze.cs.wisc.edu>

        * Version 5.6 released.

        * sym-tbl.c sym-tab.h:
        Change non-ANSI header.

        * cl-cache.c mem.c cl-mem.h:
        Changes to CL-SPIM from Anne.

Tue Jan  3 14:14:59 1995  James Larus  <larus@breeze.cs.wisc.edu>

        *
        Put SPIM manual on the WWW. [David Binger
        <binger@bingo.centre.edu>]

Wed Dec 14 08:37:59 1994  James Larus  <larus@breeze.cs.wisc.edu>

        * README:
        Improved description of configuration process and eliminated
        mention of LINUX patches. [carter@cs.ucsd.edu (Larry Carter)]

Tue Dec 13 16:21:01 1994  James Larus  <larus@breeze.cs.wisc.edu>

        * run.c reg.h:
        Use reg_word and u_reg_word instead of underlying data
        types. [Stephen Bloch <sbloch@adl15.adelphi.edu>]

        * parser.y, tt.le.s, tt.be.s:
        Optimization of mult $rx, $ry, 0 into li $rx, 0 was incorrect.
        [Massimiliano Poletto <maxp@amsterdam.LCS.MIT.EDU>
        and andre@ai.mit.edu (Andre' DeHon)]

        * scanner.l:
        Make scanner accept character constants '\t' and '\n'. [From:
        hollings@cs.UMD.EDU (Jeff Hollingsworth)]

        * spim.c:
        Allow spim top-level to handle EOF (control-D) gracefully. [From:
        hollings@cs.UMD.EDU (Jeff Hollingsworth)]

        * trap.handler:
        Arguments to instructions to save & restore $at were
        backwards. [baudon@labri.u-bordeaux.fr (Olivier BAUDON)]

Mon Dec 12 17:12:58 1994  James Larus  <larus@breeze.cs.wisc.edu>

        * parser.y sym-tbl.c sym-tbl.h read-aout.c:
        Bug in resolving forward references to labels in aligned data
        statements.  The references were resolved with the unaligned
        value. [fischer@kaese.cs.wisc.edu (Charles Fischer)]

Sat Nov 26 16:08:26 1994  James Larus  <larus@titanic.cs.wisc.edu>

        * spim-utils.c:
        Ensure stack is double-word aligned after all arguments to main
        are pushed.  [Anne]

Mon Nov 21 10:09:22 1994  Jim Larus  <larus@primost.cs.wisc.edu>

        * spim-utils.c spim.c spim.man:
        Did not set up argv and envp properly when program was
        -executed. [Anne]
        Changed -execute/-file to take arguments to program after
        program's name, so they must be last now.

        * read-aout.c:
        SPIM routine were freeing non-malloced strings from ld library
        routines.

Fri Nov 11 16:56:12 1994  James Larus  <larus@breeze.cs.wisc.edu>

        * op.h run.c inst.c cl-cycle.c cl-cycle.h parser.y:
        Did not implement c.olt.s, c.olt.d, c.ult.s, c.ult.d. [Anne]

Fri Nov  4 16:20:40 1994  Jim Larus  <larus@primost.cs.wisc.edu>

        * inst.c op.h:
        Did not set SPIM instruction COND field from binary FP compare
        instructions. [Anne]

Tue Nov  1 14:48:57 1994  James Larus  <larus@breeze.cs.wisc.edu>

        * mem.c:
        Need to realloc data segment when a new one is created. [Anne]

        * read-aout.c:
        Forgot to add bss size to data segment when creating data segment
        for -execute. [Anne]

Tue Aug 30 09:09:08 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * spim.c xspim.c spim-utils.c windows.c spim.h:
        Changed type of console to be void* to avoid casting pointer to int.

Fri Aug 12 11:18:40 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * Version 5.5 released.

        * mips-syscall.c:
        Move include of sys/syscall.h into include since this file does
        not exist under AIX.

        * spim.c:
        Include termios.h as well.

Thu Aug 11 09:44:00 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * spim.c spim-utils.c Configure:
        Ifdef if machine has vfprintf and use _doprnt if not [Parag
        Patel <parag@netcom.com>, for BSDI 1.1].

        * cl-cycle.c cl-tlb.c:
        Bug fixes to print_pipeline and TLB simulation [From
        226maint@titanic.mpce.mq.edu.au (Ian Cowell), via Anne].

Fri Jul 15 12:50:27 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * Configure Makefile.std inst.c mips-syscall.c spim.c spim.h:
        Port to Solaris 2.3.

Thu Jul 14 14:48:36 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * mips-syscall.c spim.c:
        Changes to port to System V.  [Robert Lipe <robertl@arnet.com>]

        * spim.c:
        Fixed AIX ifdef.

        * mem.c mips_syscall.c:
        Eliminate bcopy/bzero calls.

Fri Jun  3 16:50:16 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * reg.h:
        Eliminate incorrect test for even register number in accessing
        FGR's.  This didn't cause problems since the only FP instructions
        that accessed FGR's didn't use this instruction. [From:
        psa@cs.Princeton.EDU]

Thu May 26 13:37:03 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * mips-syscall.c:
        Delete unneeded declaration of syscall. [From:
        rskopitz@st6000.sct.edu (ron skopitz)]

Tue Apr 26 11:34:45 1994  James Larus  (larus@breeze.cs.wisc.edu)

        * xspim.c
        Use 'g' format for floating pointer values so large numbers don't
        overflow. fields.

        * inst.c mem.c parser.y run.c spim-utils.c spim.h xspim.h
        Changes to eliminating ANSI-C related warnings from acc.

        * Configure spim-utils.c
        Split defines for strtol and strtoul (since SunOS defines the
        former, but not the latter).

        * Imakefile
        Ignore the first 5 lines of output file (the start-up message)
        when comparing test results, so as to be insensitive to version
        and trap.handler messages.

        * Configure spim.h spim-utils.c mips-syscall.c mem.c inst.c
        cl-expect.c
        Use memcpy/memset instead of bcopy/bzero functions to be more
        portable.

Mon Mar 21 08:23:21 1994  James Larus  (larus@primost.cs.wisc.edu)

        * README:
        Added information about the Amiga port of SPIM.

Tue Feb  8 15:11:31 1994  James Larus  (larus@primost.cs.wisc.edu)

        * Imakefile
        Change to scanner.l did not result in lex/flex running!

        * scanner.l
        Did not properly associate line numbers with lines because parser
        lookahead at the end of a command read the newline, thereby
        bumping the line_no counter. [jps@moravian.edu (John P.
        Stoneback)]

Tue Feb  1 14:41:31 1994  James Larus  (larus@primost.cs.wisc.edu)

        * read-aout.c:
        Changed declaration for compatibility with Ultrix 4.3 library.

Wed Jan 19 15:40:45 1994  James Larus  (larus@primost.cs.wisc.edu)

        * Version 5.4 released.

Fri Dec 24 06:20:33 1993  James Larus  (larus@primost.cs.wisc.edu)

        * Makefile.std:
        Added install target.

Tue Nov  9 16:07:08 1993  James Larus  (larus@primost.cs.wisc.edu)

        * mips-syscall.c spim-utils.c spim.c
        Did not set up argc and argv properly for -execute.  $sp now points
        to argc, even after double-word aligning stack.  Set up argv[0] for
        -execute in spim.  Added gethostname.
        [citron@plague.cs.huji.ac.il (Daniel Citron)]

Fri Nov  5 21:52:05 1993  James Larus  (larus@primost)

        * xspim.c, spim-utils.c:
        Printed message about loading trap handler.

Fri Nov  5 21:37:50 1993  James Larus  (larus@primost)

        * parser.y, spim-utils.c, Makefile.std, Imakefile:
        Fix parser so it works with bison as well as yacc.

Tue Oct 19 17:27:44 1993  James Larus  (larus@primost.cs.wisc.edu)

        * spim.tex:
        Figure showing stack frame format was incorrect: saved arguments
        listed in wrong order and arguments 1-4 missing [Frans Kaashoek
        <kaashoek@amsterdam.LCS.MIT.EDU>]

Mon Oct  4 14:27:55 1993  James Larus  (larus@primost.cs.wisc.edu)

        * scanner.l sym_tbl.h sym_tbl.c
        All top-level input (Y_ID's) entered into symbol table.

        * parser.y
        Aligning data stored in text segment left label with symbol table
        address in data segment.

        * spim.c:
        Accidentally folded cases of symbols printed by "print" command.

Tue Sep 28 16:09:35 1993  James Larus  (larus@breeze.cs.wisc.edu)

        * inst.c spim.c windows.c xspim.c inst.h spim.h parser.y:
        Purified spim & xspim to eliminate memory leaks!

Mon Aug 30 10:21:14 1993  James Larus  (larus@primost.cs.wisc.edu)

        * :
        VERSION 5.3 released.

        * Imakefile Makefile.std:
        Check that trap.handler is installed before running torture test to
        avoid cryptic error message.

Mon Aug 16 10:00:44 1993  James Larus  (larus@primost.cs.wisc.edu)

        * spim-utils.c:
        Find correct address to check for breakpoint before first instruction
        is executed [jcasey@flora.ccs.neu.edu].

Fri Jul  2 10:32:18 1993  James Larus  (larus@primost.cs.wisc.edu)

        * README
        Added mention of Documentation/cycle.ps (documenation for cl-spim
        and cl-xspim.

Mon Jun 28 17:27:14 1993  James Larus  (larus@primost.cs.wisc.edu)

        * Changes from Scott Rosenberg to cl-spim:

1.) I fixed some problems with return values in mips-syscall.c

2.) I commented out a line that causes the continue_prompt window
to pop up when stepping through code in cl-xspim

3.) I've changed some of the help menus so that you can see the
cl-spim commands and only access them when running in cycle_level
mode.


Mon May 17 15:47:52 1993  James Larus  (larus at primost)

        * mips-syscall.c cl-cache.c cl-cycle.c cl-except.c cl-cache.h
        cl-expect.h
        Change from Scott Rosenberg:

there were some problems with the signal handling because somehow an
old (and incorrect version) of gun's signal stuff was merged with mine.
fixes to both cl-spim and spim code can be found in cl-except.[ch] and
mips-syscall.c.  the errors came about due to incorrect management of
spim's pseudo memory which resulted in seg violations.

i also fixed a one line problem in mips-syscall.c in old spim code so
that return values on exit when running an assembly file in cycle mode
would match values expected by cl-spim.  (i hadn't tested this until
someone sent me mail).

i updated cl-cache.[ch] so that it could print the write back buffer.



Wed May  5 08:42:11 1993  James Larus  (larus at primost)

        * read-aout.c
        Clear symbol table before defining symbols from executable file to
        avoid conflict with trap handler's labels.

        * spim.c
        Allow multiple files to be load with multiple -file arguments.

Tue Apr 20 10:32:40 1993  James Larus  (larus at primost)

        * spim.c
        Make quit a synonym for exit.

Fri Mar 26 14:58:53 1993  James Larus  (larus at primost)

        * sym-tbl.c
        Did not fix branch offset field in encoded instruction after label
        resolved. [Fischer].

Wed Mar 24 11:25:02 1993  James Larus  (larus at primost)

        * xspim.c
        Fix printing of stack arguments. [Charles Fischer].

        * button.c
        Put arg's to main back on stack after reinitialization.

        * parser.y
        Fix previous change to NOR.

Tue Mar 23 16:26:50 1993  James Larus  (larus at primost)

        * parser.y
        Fix code generation for SUB/NOR w/ immediate, which generated
        extra register traffic [Charles Fischer].

Thu Mar  4 08:37:30 1993  James Larus  (larus at primost)

        * run.c tt.le.s
        Bug in lwr when offset is 0 for little-endian machines [From:
        kohn@ICSI.Berkeley.EDU (Philip Kohn)]

        * xspim.c
        Displayed incorrect registers for single precision floats [From:
        Charles Fischer].

Sat Feb 13 14:05:01 1993  James Larus  (larus at primost)

        * spim.tex
        Change start of data segment from 0x1000000 to 0x10000000 (correct
        value).  From smith@harvard.

Tue Jan 26 08:40:45 1993  James Larus  (larus at primost)

        * run.c sym_tbl.c
        Delayed instructions in bare mode were incorrect: executed 1 too
        many instructions and didn't calculate backward offset correctly
        [A.P.Sexton@computer-science.birmingham.ac.uk].

        * Imakefile
        Change EXTRA_LIBRARIES to LOCAL_LDFLAGS to be compatable with
        older xmkmfs.

Mon Jan 25 08:38:37 1993  James Larus  (larus at primost)

        * Rerelase 5.2

        * Imakefile
        Change EXTRA_DEFINES to DEFINES to be compatible with older xmkmfs.

Wed Jan 20 12:58:34 1993  James Larus  (larus at primost)

        * Rerelease 5.2

        * mips-syscall.c
        Used untranslated value in mapping sigvec system call.

        * mem.c
        Bug in writing value into stack after it grows.

Mon Jan 18 10:05:58 1993  James Larus  (larus at primost)

        * Release 5.2

        * mem.h mips-syscall.c parser.y spim.c spim.h xspim.c xspim.h
        Minor changes to port SPIM to RS6000 running AIX.

Fri Jan 15 11:47:31 1993  James Larus  (larus at primost)

        * trap.handler
        Save and restore $at in the trap handler.

        * parser.y scanner.l sym-tbl.c sym-tbl.h
        Parse a wide variety of additional constructs produced by cc, gcc,
        and lcc in .S files.

        * spim.c xspim.c tt.io.s
        Bugs in mapped IO: be more careful about restoring state in
        switching between console and program mode.
        Also, use only RAW mode, not CBREAK mode.

Mon Dec 14 10:10:28 1992  James Larus  (larus at primost)

        * spim.man xspim.man
        Wrote man page for spim and xspim.

        * buttons.c cl-cycle.c windows.c xspim.c
        Minor fixes for cl-xspim (hidden buttons, bad decls).
        [From:A.P.Sexton@computer-science.birmingham.ac.uk]

Tue Nov 24 16:35:12 1992  James Larus  (larus at primost)

        * button.c spim-utils.c
        Read in memory addresses as unsigned, not signed, numbers.

        * mem.c
        Raise immediate interrupt after enabling interrupts on ready
        transmitter.

Mon Nov 23 10:53:48 1992  James Larus  (larus at primost)

        * parser.y op.h
        .label directive should be .lab and it failed [Scott Kempf].

        * parser.y
        sllv $r, $r, 4 core dumped [Scott Kempf].

        * inst.c
        Don't print empty brackets on instruction display line.

        * sym_tbl.c
        Don't try to change data into instruction encoding of itself.

        * data.c data.h parser.y
        Unaligned (but auto-aligned) .word with forward reference failed
        because backpatch data structure did not catch alignment [Scott Kempf].

Mon Nov  9 08:37:54 1992  James Larus  (larus at primost)

        * tt.le.s tt.be.s
        Overflow test did not work for signed/unsigned add [Scott Kempf].

        * trap.handler
        Don't change $sp in trap handler [Scott Kempf].

Fri Nov  6 11:45:17 1992  James Larus  (larus at primost)

        * pervasive
        Brought up SPIM on HP Snakes running HPUX (System V).

Thu Nov  5 13:24:54 1992  James Larus  (larus at primost)

        * Configure Imakefile Makefile.std
        Extended Configure to determine  -DNEED_VSPRINTF and -DNEED_STRTOL
        flags.

        * inst.c
        Breakpoint instruction was being freed by memory clear [Quentin
        Dunchue].

Fri Oct 30 11:21:25 1992  James Larus  (larus at primost)

        * Released version 5.1

        * mem.c
        Stack segment not grown correctly.

        * mem.c scanner.l spim-utils.c sym-tbl.c inst.c
        Didn't correctly zero instructions.  Added xmalloc/zmalloc routines
        to avoid problems.  [From Scott Kempf.]

        * parser.y tt.le.s tt.be.s
        NOT pseudo op was incorrect: was bitwise boolean on low bit, not
        logical negation of whole word {From Scott Kempf.]

Wed Oct 28 11:42:06 1992  James Larus  (larus at primost)

        * Configure Imakefile README
        Added Configure shell script for endian-ness.

Tue Oct 27 16:21:58 1992  James Larus  (larus at primost)

        * mips-syscall.c
        Allow 0 as address to mips system call.

        * xspim.c
        Clean-up printing of single precision floats and of floats as hex
        numbers.

Wed Oct 21 14:40:38 1992  James Larus  (larus at primost)

        * run.c spim.c spim.h xspim.c
        Fixed up earlier changes to mapped io (now -mapped_io/-nomapped_io).

Mon Oct 19 11:14:41 1992  James Larus  (larus at primost)

        * scanner.l
        Allow character constants (e.g., 'a').

        * spim.c
        Include sys/ioctl.h in spim.c [Flavio DeCastilhos - SONY/SMSC
        flavio@smsc.sony.com].

        * spim.c xspim.c Imakefile Makefile Tests/tt.le.s Tests/tt.be.s
        Tests/tt.in
        Spim IO and mapped IO interact poorly.  Added -mapio/-nomapio flag
        to distinguish them.

Wed Sep 30 09:19:52 1992  James Larus  (larus at primost)

        * scanner.l
        Don't pass bare string as format to error [Kempf].

        * spim-utils.c parser.y
        Added \n to error messages [spim-utils.c from Scott Kempf].

Fri Sep 25 08:17:54 1992  James Larus  (larus at primost)

        * run.c tt.le.s tt.be.s
        Did not handle carry-out in long multiplication routine correctly.
        Got wrong answer for -1*-1!  [jjackson@tiger.carl.ua.edu]

Wed Sep 23 09:43:29 1992  James Larus  (larus at primost)

        * Released SPIM v5.0

Fri Sep 18 08:43:18 1992  James Larus

        * xspim.c
        Reinit world when loading executable into xspim.

Wed Sep 16 15:19:27 1992  James Larus  (larus at primost)

        * spim.c  buttons.c cl-cycle.c cl-cycle.h mips-syscall.c xspim.c
        Changes from Scott R.

Mon Sep 14 16:16:29 1992  James Larus  (larus at primost)

        * spim.c xspim.c
        Don't load trap handler with -execute flag.

Thu Sep 10 14:47:52 1992  James Larus  (larus at primost)

        * IMakefile
        Wrote a IMakefile for the xmkmf program.

Wed Sep  2 11:49:05 1992  James Larus  (larus at primost)

        * Makefile buttons.c cl-cache.c cl-cache.h cl-cycle.c cl-cycle.h
        cl-except.c cl-except.h cl-tlb.c cl-tlb.h mem.c mips-syscall.c
        mips-syscall.h spim.c xspim.c xpsim.h
        Merge in Scott R's changes to cl-spim.


Wed Aug 12 16:14:46 1992  James Larus  (larus at primost)

        * buttons.c mem.c mem.h mips-syscall.c reg.h run.c spim.c spim.h
        xspim.c xspim.h
        Added memory-mapped IO facility.

Tue Aug 11 09:12:31 1992  James Larus  (larus at primost)

        * pervasive
        Merged in Anne Roger's cycle-level simulator.

        * inst.c
        Print sll $0, $0, 0 as nop.

        * run.c
        Missed carry in partial sum in double word multiply.

Mon Aug 10 15:44:13 1992  James Larus  (larus at primost)

        * read-aout.c
        Add global symbols from a.out to SPIM symbol table.

        * spim-utils.c
        Make sure $sp is double-word aligned.

Thu Aug  6 10:44:23 1992  James Larus  (larus at primost)

        * read-aout.c
        Cleaned up code to read executable by taking advantage of previous
        change to read a.out header directly into text seg.

        * inst.c inst.h mem.c
        Made data reads from text segment (eg jump tables) work correctly
        by saving binary values.

        * inst.c inst.h
        Changed instruction to be a typedef.

Fri Jul 31 12:09:57 1992  James Larus  (larus at primost)

        * pervasive
        New copyright notices.

        * read-aout.c
        Allocate header text memory for OMAGIC files.

        * spim-utils.c
        Pass envp to main in $a2 [Gun].

        * mips-syscall.h mips-syscall.c run.c
        Used Gun's modification of syscall code and his exception code in
        place of old code in run.c.

        * run.c
        Loads produce value immediately to avoid recursive call on
        run_spim, which produced incorrect result in recursive call due to
        a delayed branch. [Gun]

        * run.c, tt.le.s, tt.be.s
        Sign extension of branch immediate was incorrect (bit 13, not 15).
        [Gun]

Mon Jul 27 09:36:17 1992  James Larus  (larus at primost)

        * data.c data.h inst.c parser.y scanner.l trap.handler
        Added optional argument to .text, .data, .sdata, .rdata, .ktext,
        .kdata to specify address of next items in segment (good idea from
        mipssim).

        * scanner.l
        Complain about use of opcode as label.

Tue May 26 09:48:32 1992  James Larus  (larus at primost)

        * mem.c read-aout.c mips-syscalls.
        Changes from Emin Gun Sirer to fix minor problems with executing
        a.out files.

        * xspim.c window.c
        Fixed highlighting of executed instruction while single stepping.
        It is amazing how difficult X makes this simple task.

        * inst.c inst.h scanner.h scanner.l xspim.c
        Print the source line along with the disassembled code.

        * xspim.c
        Only display 16 (not 32!) single precision FP registers.

Thu May 14 14:12:14 1992  James Larus  (larus at primost)

        * pervasive
        Make spim/xspim ansi-C compatible.  Changed file and declaration
        structure and added function prototypes.

Thu Apr 30 13:25:45 1992  James Larus  (larus at primost)

        * xspim.c
        Changed xspim's input to be more like fgets: previously had
        off-by-1 error on buffer size and return when buffer filled.

        * xspim.c
        Block of zero-fill data was incorrectly printed one memory
        location too far.

        * data.c inst.c mem.c parser.y spim-utils.c sym_tbl.c
        Backpatching of unresolved addresses did not work for code in data
        segment.

Wed Apr 15 12:06:28 1992  James Larus  (larus at primost)

        * inst.c, xspim.c
        Bug fixes from Kempf:
        Floating point registers now output as $f4 instead of F4.
        print_imm_expr had a small bug that erased part of what it printed.
        bne and beq printed there registers in the wrong order
        Allows xspim to use Expose events when it is waiting for input.

Fri Mar 27 11:11:22 1992  James Larus  (larus at primost)

        * spim-utils.c data.c
        Did not turn off in_kernel flag after loading trap handler so
        executable code's data segment went into kernel data. [Emin
        Gun Sirer <egs@cs.Princeton.EDU>]

Wed Mar 25 17:13:49 1992  James Larus  (larus at primost)

        * op.h
        Bug in encoding of RFE & TLB instructions [vijay@zycad.com
        (Vijay Vaidyanathan)].

Mon Feb 24 15:49:06 1992  James Larus  (larus at primost)

        * xspim.c
        Reallocated, but did not free buffer used for displaying register
        values.

Fri Jan 31 11:54:20 1992  James Larus  (larus at primost)

        * parser.y
        Syntax shortcomming: needed to add ':' modifier for .ascii and
        .asciiz directive.  Real bug: needed to set usr/kernel space for
        .sdata/.rdata directives.

Mon Jan 13 10:22:39 1992  James Larus  (larus at primost)

        * Version 4.4 released.

        * xspim.c
        Changes for X11R5 libraries.  Got rid of textact.c.

        * xspim.c
        Extra indirection in arguments to X stuff.

Tue Jan  7 11:31:28 1992  James Larus  (larus at primost)

        * spim.h
        Increase default number of instructions executed to a huge value.

        * run.c
        Can't continue after exit syscall.

        * parser.y scanner.l
        Partially allow opcodes to be used as identifiers.  Still can't
        use them as labels before colon because of LALR lookahead problem.

Mon Dec 23 12:02:48 1991  James Larus  (larus at primost)

        * spim.c buttons.c spim.tex
        Set breakpoints at labels as well as memory addresses.

        * inst.c mem.c mem.h run.cc sym_tbl.c spim.tex
        Added conversion so that reads and writes of instructions work
        correctly in the text and data segments.  This means that programs
        can manipulate instructions as data and execute out of the data
        segment.  Also fixed bug in jumps to addresses with high bits set
        (ie in data segment). [Suggestion from Eliot Moss.]

        * mem.c spim-utils.c spim.c spim.h xspim.c spim.tex
        Changed memory expansion code.  Text segments do not expand. The
        data segments only expand with sbrk.  Stack segments expand
        automatically. Added new command line options to set segment sizes
        and limits. [Suggestion from Eliot Moss.]

Fri Dec 20 14:09:23 1991  James Larus  (larus at primost)

        * data.c inst.c mem.h spim-utils.c
        .extern directive was broken (from Hans Koomen).  Also fixed many
        bugs in $gp stuff.

Wed Dec 18 14:43:54 1991  James Larus  (larus at primost)

        * spim.c
        Error in program run under -file caused botched longjmp.

Mon Dec  9 16:04:31 1991  James Larus  (larus at primost)

        * spim-utils.c
        Added copyright notice.

Thu Oct 31 10:49:30 1991  James Larus  (larus at primost)

        * xspim.c, xutils.c, Makefile
        Cleanup X stuff a bit and eliminate xutils.c.

        * run.c
        Computed carry improperly in negating result after multiplication.

        * parser.y
        Bug in test in mulo (Eliot Moss).

        * inst.h
        Minor typos (from Eliot Moss).

Mon Oct 21 11:04:53 1991  James Larus  (larus at primost)

        * run.c
        Carry did not propagate from lo->hi in multiplicaton (from Scott).

Fri Aug 30 09:50:10 1991  James Larus  (larus at primost)

        * Version 4.3 released.

        * tt.*
        Move all of the tests to the subdirectory Tests/

        * tt.alu.bare.s tt.fpu.bare.s
        New test of the ALU and FPU instructions in bare mode (from Anne
        Rogers).

        * run.c
        Need to force delayed updating in lwl/lwr in bare mode.

Tue Aug 27 13:35:01 1991  James Larus  (larus at primost)

        * run.c
        Delayed loads of unsigned bytes and halfs did not mask out bits
        (from Anne Rogers).

Mon Aug 26 10:30:59 1991  James Larus  (larus at primost)

        * data.c
        Set the variable program_break for assembly-language programs as
        well as a.out files.

Fri Aug 23 13:09:15 1991  James Larus  (larus at primost)

        * data.c
        Did not save unaligned data larger than a byte properly (from Jeff
        Jackson).

        * run.c spim-utils.c spim.c
        LWC1 did not update the destination register in the bare machine
        (from Anne Rogers).
        Load trap.handler in non-bare machine mode.

Fri May 10 10:40:29 1991  James Larus  (larus at primost)

        * Version 4.2 released.

        * spim.tex
        Improved the documentation in many small ways, including a couple
        of sections on MIPS conventions.

        * inst.c
        Print R# as $# in instructions.

        * xspim.c button.c
        Clear the console window when the machine is reset.

Thu May  9 16:00:56 1991  James Larus  (larus at primost)

        * Makefile, scanner.l
        Changes to permit use of 8-bit scanners produced by flex.

        * data.c mem.c mem.h op.h parser.y spim-utils.c spim.h
        trap.handler xspim.c
        Added kdata segment [From Scott Kemp.]


Sun May  5 14:16:39 1991  James Larus  (larus at primost)

        * xspim.c
        xspim was null-terminating full buffer in read_string.

        * spim-util.c spim.c
        Handle non-existing file gracefully in spim.

Fri Apr 12 17:01:39 1991  James Larus  (larus at primost)

        * inst.c, tt.le.s, tt.be.s
        lw with small negative offset did not work.

Thu Apr  4 12:03:35 1991  James Larus  (larus at primost)

        * spim.c
        Clear redo flag on serious error to prevent single-step loop at
        error.

Mon Mar 25 14:02:21 1991  James Larus  (larus at primost)

        * Released version 4.1.

Thu Mar 21 09:01:18 1991  James Larus  (larus at primost)

        * parser.y
        More problems with labels fixed.

        * mem.c
        Raise exceptions, not fatal errors on out of bounds memory refs.

Tue Mar 19 16:09:15 1991  James Larus  (larus at primost)

        * parser.y
        Treat hanging labels as if they occured on next non-blank line.

        * mem.c
        Better error messages for out-of-bounds memory references.

        * run.c, sym_tbl.c
        j instruction did not work when high 4 bits of PC were non-zero
        (ie kernel).

Wed Mar 13 17:29:18 1991  James Larus  (larus at primost)

        * xspim.c
        Corrected eror when $sp is non-word aligned and displaying stack
        segment.

Mon Mar 11 10:22:18 1991  James Larus  (larus at primost)

        * xspim.c
        Made ^C work in read_input.

        * mem.c
        Expand stack had typo that screwed up byte references to stack.

Thu Mar  7 15:39:18 1991  James Larus  (larus at primost)

        * op.h
        Correct cvt instruction encodings.

        * inst.c
        Computation of absolute offset was wrong when high bit set because
        of sign-extension (from Scott Kemp).

Tue Jan 29 13:28:56 1991  James Larus  (larus at primost)

        * scanner.l, parser.y
        Avoid some spurious parse errors caused by eating newline in error
        recovery [From Scott Kempf].

Tue Jan 22 08:59:53 1991  James Larus  (larus at primost)

        * xspim.c
        Printed wrong single precsision FP numbers.

        * parser.y
        Fixed spurious warning about $f31.

Mon Jan 14 11:50:26 1991  James Larus  (larus at primost)

        * Version 4.0 released.

        * buttons.c inst.c mem.c mem.h windows.c xspim.c xspim.h xutils.c
        New interface.  Instead of file window, added windows into text
        and data segments that are dynamically updated.

Fri Jan 11 09:25:26 1991  James Larus  (larus at primost)

        * buttons.c inst.c spim-utils.c
        A number of bugs in breakpoints eliminated.  Can properly continue
        from single-stepping at a breakpoint.  Eliminated infinite loop in
        deleting breakpoints.  Don't allow double breakpoints.

        * xspim.c
        Added the ability to display single floats.
        Also can display any register set in natural or hex notation.

Thu Jan 10 13:45:13 1991  James Larus  (larus at primost)

        * sym_tbl.c
        Needed to sign-extend the short offset field in branches after
        shifting right.

        * parser.y
        Some branch instructions had their operands switched.

        * parser.y
        Accept <offset> + <label> as expression.

        * scanner.l
        Catch and report unknown characters.

Fri Jan  4 11:26:06 1991  James Larus  (larus at primost)

        * inst.c op.h run.c spim.h
        Improved printing of offsets in branches and jumps by shifting
        left 2 places and reducing the symbolic cruft printed.

Tue Dec 18 12:05:38 1990  James Larus  (larus at primost)

        * buttons.c
        Added continue button to step menu.

Wed Dec 12 11:48:48 1990  James Larus  (larus at primost)

        * mem.c tt.le.s tt.be.s
        Test to decide which segment to exapnd was broken.

        * mem.h reg.h spim.h mem.c run.c spim.c xspim.c
        Added new class of errors (run_error) that terminate program, but
        not spim.

Tue Dec 11 07:15:40 1990  James Larus  (larus at primost)

        * run.c spim-syscall.h
        Added read_double system call and re-numbered calls.

        * button.c xspim.c spim.c
        Don't load trap handler when clearing bare machine.

        * trap.handler
        Exit on IBUS exception to avoid infinite loop.

        * run.c trap.handler
        Better exception error messages.

        * op.h
        COP1 opcode was incorrect [Goodman].

        * scanner.l
        Accept floating point numbers without trailing fraction (e.g. 2.).

        * parser.y
        Control register specifier in CTCz/CFCz was ignored.

        * data.c op.h parser.y trap.handler tt.?e.s
        Corrected ".asciz" directive to be ".asciiz".

        * scanner.l
        Improved syntax error message printing.

        * parser.y op.h
        Added .livereg decl for cc v2.10 compiler.

        * inst.c
        Improved printing of immediate expressions by eliminating
        redundant information.

        * parser.y tt.le.s tt.be.s
        LI did not work properly on constants > 32K [Canderson].

Mon Dec 10 14:36:39 1990  James Larus  (larus at primost)

        * run.c trap.handler tt.le.s tt.bare.s tt.be.s
        Simulated syscalls now use correct syscall convention: $v0 to pass
        code, and $a0,... for args.

        * Pervasive.
        Can invoke many MIPS system calls from executable files (David W.).

        * buttons.c spim-utils.c
        Pass command-line arguments to programs.

        * Many small bugs from running executables.


Tue Nov 20 15:18:28 1990  James Larus  (larus at primost)

        * spim-util.c
        Check that source file doesn't begin with magic number.

        * read-aout.c spim-utils.c spim.h
        Added source_file flag to identify the type of the input file.

Thu Oct 25 11:45:58 1990  James Larus  (larus at primost)

        * parser.y, op.h
        Eliminated div_i hack by overloading "div" operator.

Wed Oct 24 17:26:49 1990  James Larus  (larus at primost)

        * parser.y
        Parse div_i instruction!

Tue Sep 25 13:18:43 1990  James Larus  (larus at primost)

        * tt.bare.s
        Put trap handler in kernel, just as in trap.handler.

Fri Sep 21 10:52:32 1990  James Larus  (larus at primost)

        * button.c xspim.c
        Used file name from -file for load dialog box.

        * spim-utils.c, inst.c
        Can now delete breakpoint while stopped at it.

        * Rereleased version 3.0.

        * xspim.c
        Popup continue dialog even when continuing from breakpoint.

        * mem.c
        Check that read/write is within bounds after expanding memory.

Wed Sep 19 15:18:00 1990  James Larus  (larus at primost)

        * Rereleased version 3.0.

        * spim-util.c
        Cleared breakpoints upon reset.

        * button.c xspim.c
        Fixed continue button so it works properly.  Also, made ^C work
        better with the new continue button.

Tue Sep 18 11:56:16 1990  James Larus  (larus at primost)

        * Rereleased version 3.0.

        * buttons.c spim-utils.c spim.c xspim.c
        Added popup to continue from breakpoints.

Thu Sep  6 11:04:00 1990  James Larus  (larus at primost)

        * Rereleased version 3.0.

        * Changed xspim's printing of FP registers to fit better.

        * read_float and read_string did not read from console window.

Tue Sep  4 16:25:46 1990  James Larus  (larus at primost)

        * Released version 3.0.

        * Renamed syscall registers to start at $a0 (not $a1).

Fri Aug 31 10:51:29 1990  James Larus  (larus at primost)

        * Made 2 button dialog work properly on newline.

        * Only permit one instance of each menu.

Wed Aug 29 07:52:41 1990  James Larus  (larus at primost)

        * Rereleased 3.0 beta of Aug. 29.

        * Added dialog box for run.

        * Made entries in most dialog boxes persistent between invocations.

        * Catch and properly handle control C.

        * Clear memory before loading executable to get rid of trap handler.

        * Aborting load trashed saved file name.

        * Released 3.0 beta of Aug. 29.

        * Improved register display to all registers more compactly.

        * Made popups non-exclusive. [wagner@bullwinkle.Colorado.EDU]

        * Beta bug fixes from David Wood:
        xspim -file started running program right away.
        Single-stepping cleared Cause register.
        Can change R0.

        Added -execute flag to xspim.
        Made memory expansion work properly.


Tue Aug 28 11:29:44 1990  James Larus  (larus at primost)

        * Released 3.0 beta of Aug. 28.

        * Makefile buttons.c mem.c spim-utils.c xspim.c xutils.c
        Beta bug fixes from David Wood:
        Single stepping N steps failed.
        Setting breakpoint at bad address killed system.
        Single stepping through a breakpoint failed.
        Setting register to value beginning with 0x failed.
        Removed unnecessary file opens.
        Improved error checking.
        Added auxilary routines for vsprintf and strtol.

Mon Aug 27 13:53:22 1990  James Larus  (larus at primost)

        * button.c
        Improved help message.

        * Makefile
        Use ./spim, not spim in test.

        * Released 3.0beta.

        * buttons.c parser.y scanner.l spim-util.c windows.c xspim.c
        Rewrote user interface code.

Fri Aug 24 15:14:19 1990  James Larus  (larus at primost)

        * Pervasive.
        Added X window interface by Alan Siow.

Tue Aug 21 08:56:04 1990  James Larus  (larus at primost)

        * Makefile inst.c mem.c mem.h op.h parser.y read-aout.c spim.c
        spim.h trap.handler
        Added kernel text segment (but not kernel data/stack segments).

Mon Aug 20 14:21:35 1990  James Larus  (larus at primost)

        * spim.c trap.handler tt.le.s
        Leave Cause register set in single/step mode and clear in trap
        handler.

Fri Aug 17 14:58:04 1990  James Larus  (larus at primost)

        * spim.c
        Don't start top-level with executable file.
        Execute a.out from starting address in file.

Thu Aug 16 16:56:12 1990  James Larus  (larus at primost)

        * Released version 2.5 (no announcement).

Fri Jul 27 14:36:50 1990  James Larus  (larus at primost)

        * Makefile inst.c spim.c read-aout.c
        Added code to read MIPS a.out files.

        * pervasive
        Changed printing of hexdecimal numbers to be fixed format.

        * parser.y, inst.c
        Allowed instructions in data segment and word data in instruction
        segment.

Wed Jul 25 13:47:11 1990  James Larus  (larus at primost)

        * inst.c op.h run.c scanner.l
        Added code to convert betwen MIPS binary format and internal
        format for instructions.

Mon Jul  2 09:43:24 1990  James Larus  (larus at primost)

        * spim.c
        -asm flag did not work properly.

        * inst.h, inst.c, run.c
        Improper sign-extension of constant in backward branches.

        * parser.y, op.h
        Added .alias and .noalias assembler directives (ignored).

Thu May 24 09:57:30 1990  James Larus  (larus at primost)

        * Version 2.3 released.

        * inst.c op.h parser.y, spim.tex tt.?e.s
        Implemented ROL/ROR instructions.  Fixed bug that caused S?LV
        instructiosn to print fields in reverse order.

Wed May 23 09:52:57 1990  James Larus  (larus at primost)

        * scanner.l, spim.tex
        For an unknown reason, v0 and v1 were called v2, v3.  Fixed this
        bug. [beihl%cadillac.cad.mcc.com@mcc.com (Gary Beihl)]

Mon May 21 15:34:12 1990  James Larus  (larus at primost)

        * run.c, spim.c, spim.h, scanner.l
        Recompiled on DECstation under T4.0.  That system has bug in atoi,
        but other changes seem worthwhile. [whaley@dungeon.pa.dec.com]

        * Version 2.2 released.

Thu May 17 16:41:18 1990  James Larus  (larus at primost)

        * run.c, inst.c, parser.y, tt.?e.s
        Constants were not sign-extended in arithmetic immediate
        instructions.  Now produce literal values with ORI, not ADDI.
        [carl@aurora.com (Carl Stehle)]

Mon May 14 13:35:27 1990  James Larus  (larus at primost)

        * scanner.l
        Remove typo in string.  Also, change call on strtol to sscanf
        since the first function doesn't appear to be standard BSD. [From:
        Brian R Murphy <hindmost@ATHENA.MIT.EDU>]