build: fpu becomes an optional part

Author: hchunhui

Makefile

@@ -9,6 +9,7 @@ SLIRP_INC =
 SLIRP_LIB = -lslirp
 
 CFLAGS = -I . -Wall -O3 -ffunction-sections -fdata-sections -g -Wl,--gc-sections ${SLIRP_INC}
+CFLAGS += -DI386_ENABLE_FPU
 CFLAGS += -DI386_ENABLE_MMX -DI386_ENABLE_SSE -DI386_ENABLE_SSE2 -DI386_ENABLE_SSE3
 CFLAGS_SDL = ${CFLAGS} `${SDL_CONFIG} --cflags`
 

esp/main/CMakeLists.txt

@@ -30,6 +30,7 @@ else()
     add_definitions(-include ${CMAKE_CURRENT_SOURCE_DIR}/board_jc3248w535.h)
 endif()
 
+add_definitions(-DI386_ENABLE_FPU)
 add_definitions(-DUSE_FMOPL)
 
 set_source_files_properties("../../adlib.c" PROPERTIES COMPILE_FLAGS "-Wno-all")

i386.c

@@ -17,14 +17,14 @@
 #ifndef __wasm__
 #define I386_OPT2
 #endif
-#define I386_ENABLE_FPU
 
 #ifdef I386_ENABLE_FPU
 #include "fpu.h"
 #else
 #define fpu_new(...) NULL
 #define fpu_exec1(...) false
 #define fpu_exec2(...) false
+#define fpu_delete(...)
 typedef void FPU;
 #endif
 

wasm/Makefile

@@ -19,7 +19,9 @@ main.c \
 ../pc.c \
 libc/libc.c
 
-CFLAGS = -DI386_ENABLE_MMX -DI386_ENABLE_SSE -DI386_ENABLE_SSE2 -DI386_ENABLE_SSE3
+CFLAGS =
+CFLAGS += -DI386_ENABLE_FPU
+CFLAGS += -DI386_ENABLE_MMX -DI386_ENABLE_SSE -DI386_ENABLE_SSE2 -DI386_ENABLE_SSE3
 CFLAGS += -DUSE_FMOPL
 
 .PHONY: all