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Copy pathexpandSubgroups neglength.nasm
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expandSubgroups neglength.nasm
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; ******** subgroup scatter by compress
; same principal as the scalar sort but 16 codes at a time with compress select
; expected 2.35µs total time
global expandSubgroups
default rel
section .data
align 64
z14: dd 0,0x80,0x100,0x180,0x200,0x280,0x300,0x380
dd 0x400,0x480,0x500,0x580,0x600,0x680,0x700,0x780
z19: db 1,0,5,4,9,8,13,12,17,16,21,20,25,24,29,28
db 33,32,37,36,41,40,45,44,49,48,53,52,57,56,61,60
db 65,64,69,68,73,72,77,76,81,80,85,84,89,88,93,92
db 97,96,101,100,105,104,109,108,113,112,117,116,121,120,125,124
z29: dw 0xfffe,0x5554,0x3332,0x1110,0xf0e,0x504,0x302,0x100,0xfe,0x54,0x32,0x10,0xe,4,2,0
dw 0xfffe,0x5554,0x3332,0x1110,0xf0e,0x504,0x302,0x100,0xfe,0x54,0x32,0x10,0xe,4,2,0
extractable: dd 1,2,4,8,3,5,9,6,10,7,11,12,13,14,15,0
mergeevenwords2t:
dw 0,32,2,34,4,36,6,38,8,40,10,42,12,44,14,46
dw 16,48,18,50,20,52,22,54,24,56,26,58,28,60,30,62
bmtwd.perm: db 0,16,32,48,2,18,34,50,4,20,36,52,6,22,38,54
db 8,24,40,56,10,26,42,58,12,28,44,60,14,30,46,62
db 1,17,33,49,3,19,35,51,5,21,37,53,7,23,39,55
db 9,25,41,57,11,27,43,59,13,29,45,61,15,31,47,63
bmtwd.msh1: dq 4,4,60,60
bmtwd.tlm1: dq 0xf0f0f0f0f0f0f0f0, 0xf0f0f0f0f0f0f0f0
dq 0x0f0f0f0f0f0f0f0f, 0x0f0f0f0f0f0f0f0f
bmtwd.msh2: dq 2, 62
bmtwd.tlm2: dq 0xcccccccccccccccc, 0x3333333333333333
bmtwd.msh3: dq 0x19110901372f271f
bmtwd.tlm3: dq 0x55555555aaaaaaaa
;upperw: dq 0xcccccccccccccccc
z30: dd 0x80008000
z31: dd 0x40004000
x100: dd 0x100
x200: dd 0x200
x400: dd 0x400
x800: dd 0x800
comb: dd 0xcccccccc
section .text
; rdi = codes rsi = index edx = nwords
expEnd:
;; TODO: cleanup and pops
ret
expandSubgroups:
;; TODO: pushes
;; first load masks and permutations
vmovdqa32 zmm13, [extractable]
vmovdqa32 zmm14, [z14]
vpbroadcastd zmm15, [x100] ; 0x100
vpbroadcastd zmm16, [x200] ; 0x200
vpbroadcastd zmm17, [x400] ; 0x400
vpbroadcastd zmm18, [x800] ; 0x800
vmovdqa32 zmm19, [z19]
mov eax, 1
vpbroadcastw zmm20, eax
vmovdqa32 zmm21, [bmtwd.perm]
vbroadcasti64x4 zmm22, [bmtwd.msh1]
vbroadcasti64x4 zmm23, [bmtwd.tlm1]
vbroadcasti64x2 zmm24, [bmtwd.msh2]
vbroadcasti64x2 zmm25, [bmtwd.tlm2]
vpbroadcastq zmm26, [bmtwd.msh3]
vpbroadcastq zmm27, [bmtwd.tlm3]
vmovdqa32 zmm28, [mergeevenwords2t]
vmovdqa32 zmm29, [z29]
vpbroadcastd zmm30, [z30]
vpbroadcastd zmm31, [z31]
mov eax, 0xfffe
kmovw k6, eax
; broadcast bitmasks to z10/11/12/13 just before expansion, not here
xor ebx, ebx
.letterloop:
add ebx, 1 ; letter: skipping subgroup scatter for first letter as it will
; not be used
movsx rcx, word [rsi + rbx * 4] ; whole length of the lettergroups is the first block
test rcx, rcx
jz expEnd ; no point continuing for letters with no words
mov r9, rcx ; keep for later
movzx r8, word [rsi + rbx * 4 + 2] ; end of letter group
lea r8, [rdi + r8 * 4] ; to working pointer
vpxord zmm2, zmm2, zmm2 ; the count w0
vpxord zmm3, zmm3, zmm3 ; the count w1
vpxord zmm4, zmm4, zmm4 ; the count w2
vpxord zmm5, zmm5, zmm5 ; the count w3
.subgroupcountloop:
vmovdqu32 zmm0, [r8 + rcx * 4]
vmovdqu32 zmm1, [r8 + rcx * 4 + 64]
vpermt2b zmm0, zmm19, zmm1 ; z19=1,0,5,4,9,8,13,12 (b)(l2r)
; first words of 32 codes, reversed bytes
vptestmw k1, zmm0, zmm31 ; z31 = 0x4000s(w) bit6 present as mask
vptestmw k2, zmm0, zmm30 ; z30 = 0x8000s(w) bit7 present as mask
vpermw zmm0, zmm0, zmm29 ; z29 = 0xfffe,0x5554,0x3332,0x1110,0x0f0e,0x0504,0x0302,0x0100,0xfe,....,0 (x2)(w)(l2r)
; excluding bit0 means the count for the unfiltered group g0 will be ignored and excluded
vpermb zmm1, zmm21, zmm1 ; collect-first-bytes-ish
vpermq zmm2, zmm1, 0x4e ; swap lanes
vprolvq zmm2, zmm2, zmm22 ; zmm24=4,4,-4,-4
vpternlogq zmm1, zmm23, zmm2, 0xb8 ; B?C:A zmm25=0x0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0ff0f0f0f0f0f0f0f0f0f0f0f0f0f0f0f0 x2
vpalignr zmm2, zmm1, zmm1, 8 ; swap qwords
vprolvq zmm2, zmm2, zmm24 ; zmm26=2,-2
vpternlogq zmm1, zmm25, zmm2, 0xb8 ; zmm27=0x3333333333333333cccccccccccccccc
vpmultishiftqb zmm2, zmm26, zmm1 ; zmm28=0x19110901372f271f
vpternlogq zmm1, zmm27, zmm2, 0xb8 ; zmm29=0x55555555aaaaaaaa
kmovd eax, k1
vpbroadcastd zmm11, eax
kmovd eax, k2
vpbroadcastd zmm12, eax
add rcx, 32
jns .sgclOut
vmovdqa32 zmm10, zmm0
vpternlogd zmm10, zmm11, zmm12, 0x10 ;A&~(B|C) ie w0
vpopcntd zmm10, zmm10
vpaddd zmm2, zmm2, zmm10
vmovdqa32 zmm10, zmm0
vpternlogd zmm10, zmm11, zmm12, 0x80 ;A&(B&C) ie w3
vpopcntd zmm10, zmm10
vpaddd zmm5, zmm5, zmm10
vmovdqa32 zmm10, zmm0
vpternlogd zmm10, zmm11, zmm12, 0x40 ;A&(B&~C) ie w1
vpopcntd zmm10, zmm10
vpaddd zmm3, zmm3, zmm10
vpternlogd zmm0, zmm11, zmm12, 0x20 ;A&(~B&C) ie w2
vpopcntd zmm0, zmm0
vpaddd zmm4, zmm4, zmm0
jmp .subgroupcountloop ; 14p5 11p05 4p0 29tp05, 14.5c/l
.sgclOut:
movd xmm1, ecx
vpslld zmm0, zmm0, xmm1 ; dump bits from overread
vpslld zmm11, zmm11, xmm1
vpslld zmm12, zmm12, xmm1 ; bits stay inline so rest is valid unmodified
vmovdqa32 zmm10, zmm0
vpternlogd zmm10, zmm11, zmm12, 0x10 ;A&~(B|C) ie w0
vpopcntd zmm10, zmm10
vpaddd zmm2, zmm2, zmm10
vmovdqa32 zmm10, zmm0
vpternlogd zmm10, zmm11, zmm12, 0x80 ;A&(B&C) ie w3
vpopcntd zmm10, zmm10
vpaddd zmm5, zmm5, zmm10
vmovdqa32 zmm10, zmm0
vpternlogd zmm10, zmm11, zmm12, 0x40 ;A&(B&~C) ie w1
vpopcntd zmm10, zmm10
vpaddd zmm3, zmm3, zmm10
vpternlogd zmm0, zmm11, zmm12, 0x20 ;A&(~B&C) ie w2
vpopcntd zmm0, zmm0
vpaddd zmm4, zmm4, zmm0
; group0l is all 4 combined - indexes based on sum of prior g0 lengths
vpaddd zmm10, zmm2, zmm4 ; w0 + w2
vpaddd zmm8, zmm10, zmm5 ; w0 + w2 + w3
vpaddd zmm10, zmm8, zmm3 ; whole group lengths, will be g0l
vpxord zmm0, zmm0, zmm0 ; accumulate left (8 steps)
valignd zmm12, zmm10, zmm0, 8 ; shift left 8 dwords
vpaddd zmm11, zmm10, zmm12
valignd zmm12, zmm11, zmm0, 12 ; shift left 4 dwords
vpaddd zmm11, zmm11, zmm12
valignd zmm12, zmm11, zmm0, 14 ; shift left 2 dwords
vpaddd zmm11, zmm11, zmm12
valignd zmm12, zmm11, zmm0, 15 ; shift left 1 dword
vpaddd zmm11, zmm11, zmm12
valignd zmm11, zmm11, zmm11, 15 ; rotate left one dword
movd r13d, xmm11 ; extract the grand total...
vpord zmm11{k6z}, zmm11, zmm11 ; k6=0xfffe ...then erase it
; indexes relative to start of letters groups
vpbroadcastd zmm12, edx
vpaddd zmm6, zmm11, zmm12 ; g0i:: base for the rest
add edx, r13d ; where the end of this set of subgroups will be
; order is imprtant: see also comment in sortPop2-Lpop.nasm
; we are using in-memory order: w3w2w0w1
; so the overlapping search groups are: m0m01m0123m02
; we are also using end indexes and negative lengths to save a few ops in the search loop
; m0: idx=w3+w2+w0+w1, l=w3+w2+w0+w1
; m1: idx=w3+w2+w0, l=w2+w0
; m2: idx=w3+w2+w0+w1, l=w0+w1
; m3: idx=w3+w2+w0, l=w0
; w0-3 are the counts from above: w0=zmm2, w1=zmm3, w2=zmm4, w3=zmm5.
; these have been totalled into zmm10, and an accumulate-left done into zmm6 to provide the
; base index for each subgroup
vpaddd zmm7, zmm6, zmm10 ; end idx for m0,m2 = base + all4
vpaddd zmm8, zmm8, zmm6 ; end idx for m1,m3 = base + w0w2w3
vpsubd zmm2, zmm0, zmm2 ; l3 = -w0
vpsubd zmm3, zmm2, zmm3 ; l2 = -w0-w1
vpsubd zmm4, zmm2, zmm4 ; l1 = -w0-w2
vpsubd zmm5, zmm0, zmm10 ; l0 = -all
; 64 groups, 32dw(128b) apart. best to scatter with fixed index, increment the base
lea rax, [rsi + rbx * 4] ; group m0
kmovw k1, k6 ; scatter needs a mask, leaving out g0 which is already written
vmovdqa32 zmm0, zmm28
vpermi2w zmm0, zmm5, zmm7 ; even/odd blending of low words from 2 tables
vpscatterdd [rax + zmm14 * 4]{k1}, zmm0 ; z14=0,128,256,384,512...(dw)(l2r)
add rax, 32 ; group m1
kmovw k1, k6 ; scatter needs a mask, leaving out g0 which is already written
vmovdqa32 zmm0, zmm28
vpermi2w zmm0, zmm4, zmm8 ; even/odd blending of low words from 2 tables
vpscatterdd [rax + zmm14 * 4]{k1}, zmm0 ; z14=0,128,256,384,512...(dw)(l2r)
add rax, 32 ; group m2
kmovw k1, k6 ; scatter needs a mask, leaving out g0 which is already written
vmovdqa32 zmm0, zmm28
vpermi2w zmm0, zmm3, zmm7 ; even/odd blending of low words from 2 tables
vpscatterdd [rax + zmm14 * 4]{k1}, zmm3 ; z14=0,128,256,384,512...(dw)(l2r)
add rax, 32 ; group m3
kmovw k1, k6 ; scatter needs a mask, leaving out g0 which is already written
vmovdqa32 zmm0, zmm28
vpermi2w zmm0, zmm2, zmm8 ; even/odd blending of low words from 2 tables
vpscatterdd [rax + zmm14 * 4]{k1}, zmm2 ; z14=0,128,256,384,512...(dw)(l2r)
;************************************************************************************
; get main group index in again
; re-reading is bad - has to wait for scatters to complete and probably triggers the watchdog.
; we can use negative indexing throughout
; and extract the group ends from the m0l0 tables we already have in zmm5/zmm7
; we are writing groups 1,2,4,8 on this first cycle
; then 3,5,9
; then 6,10; 7,11; 12; 13; 14; 15;
; so permute with 1,2,4,8,3,5,9,6,10,7,11,12,13,14,15,0 then use alignd to bring each 4 into view of extract
; but we need start indexes not ends so...
; vpermd zmm5, zmm13, zmm5
mov rcx, r9 ; kept from before - whole group neg.length
vpaddd zmm6, zmm7, zmm5 ; start-indexes of exp.groups. lengths are negative, so add them
vpermd zmm6, zmm13, zmm6 ; only permuting start-indexes since read order for source groups is 1,2,3,4,5,6,7
movd r9d, xmm6
vpextrd r10d, xmm6, 1
vpextrd r11d, xmm6, 2
vpextrd r12d, xmm6, 3
; four write indexes in r9,r10,r11,r12 (rdi base)
.subgroupcopyloop1: ; first filter by one letter each to 4 groups
vmovdqu32 zmm0, [r8 + rcx * 4]
add rcx, 16
jns .vsgclout1 ; leave to do masked final round
vptestnmd k1, zmm0, zmm15 ; z10 has 0x100s(dw)
vpcompressd [rdi + r9 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r9d, eax
vptestnmd k1, zmm0, zmm16 ; z11 has 0x200s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
vptestnmd k1, zmm0, zmm17 ; z10 has 0x400s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r11d, eax
vptestnmd k1, zmm0, zmm18 ; z10 has 0x800s(dw)
vpcompressd [rdi + r12 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r12d, eax
jmp .subgroupcopyloop1 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout1:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm15 ; z10 has 0x100s(dw)
vpcompressd [rdi + r9 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm16 ; z11 has 0x200s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm17 ; z10 has 0x400s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm18 ; z10 has 0x800s(dw)
vpcompressd [rdi + r12 * 4]{k1}, zmm0
; repeat adding one bit each time like for scalar expander
vpextrd r9d, xmm7, 1 ; end of g1
lea r9, [rdi + r9 * 4] ; to pointer
vpextrd ecx, xmm5, 1 ; negl of g1
movsx rcx, ecx
valignd zmm1, zmm6, zmm6, 4 ; 4dw right rotation of startindexes
movd r10d, xmm1 ; g3 si
vpextrd r11d, xmm1, 1 ; g5 si
vpextrd r12d, xmm1, 2 ; g5 si
.subgroupcopyloop2: ; filter out each of other 3 bits from group 1 (3,5,9)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout2 ; leave to do masked final round
vptestnmd k1, zmm0, zmm16 ; z11 has 0x200s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
vptestnmd k1, zmm0, zmm17 ; z12 has 0x400s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r11d, eax
vptestnmd k1, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r12 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r12d, eax
jmp .subgroupcopyloop1 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout2:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm16 ; z10 has 0x100s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm17 ; z11 has 0x200s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm18 ; z12 has 0x400s(dw)
vpcompressd [rdi + r12 * 4]{k1}, zmm0
;*****
vpextrd r9d, xmm7, 2 ; end of g2
lea r9, [rdi + r9 * 4] ; to pointer
vpextrd ecx, xmm5, 2 ; negl of g2
movsx rcx, ecx
valignd zmm1, zmm6, zmm6, 7 ; 7dw right rotation of startindexes
movd r10d, xmm1 ; g6 si
vpextrd r11d, xmm1, 1 ; g10 si
.subgroupcopyloop3: ; filter out each of other 2 bits from group 2 (6,10)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout3 ; leave to do masked final round
vptestnmd k1, zmm0, zmm17 ; z11 has 0x400s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
vptestnmd k1, zmm0, zmm18 ; z12 has 0x800s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r11d, eax
jmp .subgroupcopyloop3 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout3:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm17 ; z12 has 0x400s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
vpextrd r9d, xmm7, 3 ; end of g3
lea r9, [rdi + r9 * 4] ; to pointer
vpextrd ecx, xmm5, 3 ; negl of g3
movsx rcx, ecx ; to 64 bit
; valignd zmm1, zmm6, zmm6, 7 ; 7dw right rotation of startindexes
vpextrd r10d, xmm1, 2 ; g6 si
vpextrd r11d, xmm1, 3 ; g10 si
.subgroupcopyloop4: ; filter out each of other 2 bits from group 3 (7,11)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout4 ; leave to do masked final round
vptestnmd k1, zmm0, zmm17 ; z11 has 0x400s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
vptestnmd k1, zmm0, zmm18 ; z12 has 0x800s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r11d, eax
jmp .subgroupcopyloop4 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout4:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm17 ; z12 has 0x400s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vptestnmd k1{k2}, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r11 * 4]{k1}, zmm0
;****
valignd zmm5, zmm5, zmm5, 4
valignd zmm7, zmm7, zmm7, 4
valignd zmm1, zmm6, zmm6, 11 ; rotations for the last 4 groups
movd r9d, xmm7
lea r9, [rdi + r9 * 4] ; to pointer
movd ecx, xmm5
movsx rcx, ecx ; to 64 bit
movd r10d, xmm6
.subgroupcopyloop5: ; filter out the other 1 bit from group 4 (12)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout5 ; leave to do masked final round
vptestnmd k1, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
jmp .subgroupcopyloop5 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout5:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vpextrd r9d, xmm7, 1
lea r9, [rdi + r9 * 4] ; to pointer
vpextrd ecx, xmm5, 1
movsx rcx, ecx ; to 64 bit
vpextrd r10d, xmm6, 1
.subgroupcopyloop6: ; filter out the other 1 bit from group 5 (13)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout6 ; leave to do masked final round
vptestnmd k1, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
jmp .subgroupcopyloop6 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout6:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vpextrd r9d, xmm7, 2
lea r9, [rdi + r9 * 4] ; to pointer
vpextrd ecx, xmm5, 2
movsx rcx, ecx ; to 64 bit
vpextrd r10d, xmm6, 2
.subgroupcopyloop7: ; filter out the other 1 bit from group 6 (14)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout7 ; leave to do masked final round
vptestnmd k1, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
jmp .subgroupcopyloop7 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout7:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
vpextrd r9d, xmm7, 3
lea r9, [rdi + r9 * 4] ; to pointer
vpextrd ecx, xmm5, 3
movsx rcx, ecx ; to 64 bit
vpextrd r10d, xmm6, 3
.subgroupcopyloop8: ; filter out the other 1 bit from group 7 (15)
vmovdqu32 zmm0, [r9 + rcx * 4]
add ecx, 16
jns .vsgclout8 ; leave to do masked final round
vptestnmd k1, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
kmovw eax, k1
popcnt eax, eax
add r10d, eax
jmp .subgroupcopyloop8 ; 12p5 4p0 4p1 4p0156 2p06 12c/l, 375l in
.vsgclout8:
mov eax, 0xffff
shrx eax, eax, ecx
kmovw k2, eax
vptestnmd k1{k2}, zmm0, zmm18 ; z13 has 0x800s(dw)
vpcompressd [rdi + r10 * 4]{k1}, zmm0
; if each bit average removes 50% of prior list, loop1 goes 375x 12c/l
; loop2,6,8, go 188x 9c,6c,3c/l 18c/l total
; loop3,5,7 go 94x 6c,3c,3c/l 12c/l
; loop4 goes 47x 3c/l 3c/l
; total= 2.08µs
; total size of codes 30375 dwords
; cmp ebx, 22 ; going till letter 21 - or check for zero length?
; jnz letterloop
jmp .letterloop