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mozjpeg/simd/jcgryext-mmx.asm
DRC 123f7258a8 Format copyright headers more consistently 
The IJG convention is to format copyright notices as:

Copyright (C) YYYY, Owner.

We try to maintain this convention for any code that is part of the
libjpeg API library (with the exception of preserving the copyright
notices from Cendio's code verbatim, since those predate
libjpeg-turbo.)

Note that the phrase "All Rights Reserved" is no longer necessary, since
all Buenos Aires Convention signatories signed onto the Berne Convention
in 2000.  However, our convention is to retain this phrase for any files
that have a self-contained copyright header but to leave it off of any
files that refer to another file for conditions of distribution and use.
For instance, all of the non-SIMD files in the libjpeg API library refer
to README.ijg, and the copyright message in that file contains "All
Rights Reserved", so it is unnecessary to add it to the individual
files.

The TurboJPEG code retains my preferred formatting convention for
copyright notices, which is based on that of VirtualGL (where the
TurboJPEG API originated.)
2016-05-28 19:16:58 -05:00

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;
; jcgryext.asm - grayscale colorspace conversion (MMX)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
; Copyright (C) 2011, D. R. Commander.
;
; Based on the x86 SIMD extension for IJG JPEG library
; Copyright (C) 1999-2006, MIYASAKA Masaru.
; For conditions of distribution and use, see copyright notice in jsimdext.inc
;
; This file should be assembled with NASM (Netwide Assembler),
; can *not* be assembled with Microsoft's MASM or any compatible
; assembler (including Borland's Turbo Assembler).
; NASM is available from http://nasm.sourceforge.net/ or
; http://sourceforge.net/project/showfiles.php?group_id=6208
;
; [TAB8]
%include "jcolsamp.inc"
; --------------------------------------------------------------------------
;
; Convert some rows of samples to the output colorspace.
;
; GLOBAL(void)
; jsimd_rgb_gray_convert_mmx (JDIMENSION img_width,
; JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
; JDIMENSION output_row, int num_rows);
;
%define img_width(b) (b)+8 ; JDIMENSION img_width
%define input_buf(b) (b)+12 ; JSAMPARRAY input_buf
%define output_buf(b) (b)+16 ; JSAMPIMAGE output_buf
%define output_row(b) (b)+20 ; JDIMENSION output_row
%define num_rows(b) (b)+24 ; int num_rows
%define original_ebp ebp+0
%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_MMWORD ; mmword wk[WK_NUM]
%define WK_NUM 2
%define gotptr wk(0)-SIZEOF_POINTER ; void * gotptr
align 16
global EXTN(jsimd_rgb_gray_convert_mmx)
EXTN(jsimd_rgb_gray_convert_mmx):
push ebp
mov eax,esp ; eax = original ebp
sub esp, byte 4
and esp, byte (-SIZEOF_MMWORD) ; align to 64 bits
mov [esp],eax
mov ebp,esp ; ebp = aligned ebp
lea esp, [wk(0)]
pushpic eax ; make a room for GOT address
push ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
get_GOT ebx ; get GOT address
movpic POINTER [gotptr], ebx ; save GOT address
mov ecx, JDIMENSION [img_width(eax)] ; num_cols
test ecx,ecx
jz near .return
push ecx
mov esi, JSAMPIMAGE [output_buf(eax)]
mov ecx, JDIMENSION [output_row(eax)]
mov edi, JSAMPARRAY [esi+0*SIZEOF_JSAMPARRAY]
lea edi, [edi+ecx*SIZEOF_JSAMPROW]
pop ecx
mov esi, JSAMPARRAY [input_buf(eax)]
mov eax, INT [num_rows(eax)]
test eax,eax
jle near .return
alignx 16,7
.rowloop:
pushpic eax
push edi
push esi
push ecx ; col
mov esi, JSAMPROW [esi] ; inptr
mov edi, JSAMPROW [edi] ; outptr0
movpic eax, POINTER [gotptr] ; load GOT address (eax)
cmp ecx, byte SIZEOF_MMWORD
jae short .columnloop
alignx 16,7
%if RGB_PIXELSIZE == 3 ; ---------------
.column_ld1:
push eax
push edx
lea ecx,[ecx+ecx*2] ; imul ecx,RGB_PIXELSIZE
test cl, SIZEOF_BYTE
jz short .column_ld2
sub ecx, byte SIZEOF_BYTE
xor eax,eax
mov al, BYTE [esi+ecx]
.column_ld2:
test cl, SIZEOF_WORD
jz short .column_ld4
sub ecx, byte SIZEOF_WORD
xor edx,edx
mov dx, WORD [esi+ecx]
shl eax, WORD_BIT
or eax,edx
.column_ld4:
movd mmA,eax
pop edx
pop eax
test cl, SIZEOF_DWORD
jz short .column_ld8
sub ecx, byte SIZEOF_DWORD
movd mmG, DWORD [esi+ecx]
psllq mmA, DWORD_BIT
por mmA,mmG
.column_ld8:
test cl, SIZEOF_MMWORD
jz short .column_ld16
movq mmG,mmA
movq mmA, MMWORD [esi+0*SIZEOF_MMWORD]
mov ecx, SIZEOF_MMWORD
jmp short .rgb_gray_cnv
.column_ld16:
test cl, 2*SIZEOF_MMWORD
mov ecx, SIZEOF_MMWORD
jz short .rgb_gray_cnv
movq mmF,mmA
movq mmA, MMWORD [esi+0*SIZEOF_MMWORD]
movq mmG, MMWORD [esi+1*SIZEOF_MMWORD]
jmp short .rgb_gray_cnv
alignx 16,7
.columnloop:
movq mmA, MMWORD [esi+0*SIZEOF_MMWORD]
movq mmG, MMWORD [esi+1*SIZEOF_MMWORD]
movq mmF, MMWORD [esi+2*SIZEOF_MMWORD]
.rgb_gray_cnv:
; mmA=(00 10 20 01 11 21 02 12)
; mmG=(22 03 13 23 04 14 24 05)
; mmF=(15 25 06 16 26 07 17 27)
movq mmD,mmA
psllq mmA,4*BYTE_BIT ; mmA=(-- -- -- -- 00 10 20 01)
psrlq mmD,4*BYTE_BIT ; mmD=(11 21 02 12 -- -- -- --)
punpckhbw mmA,mmG ; mmA=(00 04 10 14 20 24 01 05)
psllq mmG,4*BYTE_BIT ; mmG=(-- -- -- -- 22 03 13 23)
punpcklbw mmD,mmF ; mmD=(11 15 21 25 02 06 12 16)
punpckhbw mmG,mmF ; mmG=(22 26 03 07 13 17 23 27)
movq mmE,mmA
psllq mmA,4*BYTE_BIT ; mmA=(-- -- -- -- 00 04 10 14)
psrlq mmE,4*BYTE_BIT ; mmE=(20 24 01 05 -- -- -- --)
punpckhbw mmA,mmD ; mmA=(00 02 04 06 10 12 14 16)
psllq mmD,4*BYTE_BIT ; mmD=(-- -- -- -- 11 15 21 25)
punpcklbw mmE,mmG ; mmE=(20 22 24 26 01 03 05 07)
punpckhbw mmD,mmG ; mmD=(11 13 15 17 21 23 25 27)
pxor mmH,mmH
movq mmC,mmA
punpcklbw mmA,mmH ; mmA=(00 02 04 06)
punpckhbw mmC,mmH ; mmC=(10 12 14 16)
movq mmB,mmE
punpcklbw mmE,mmH ; mmE=(20 22 24 26)
punpckhbw mmB,mmH ; mmB=(01 03 05 07)
movq mmF,mmD
punpcklbw mmD,mmH ; mmD=(11 13 15 17)
punpckhbw mmF,mmH ; mmF=(21 23 25 27)
%else ; RGB_PIXELSIZE == 4 ; -----------
.column_ld1:
test cl, SIZEOF_MMWORD/8
jz short .column_ld2
sub ecx, byte SIZEOF_MMWORD/8
movd mmA, DWORD [esi+ecx*RGB_PIXELSIZE]
.column_ld2:
test cl, SIZEOF_MMWORD/4
jz short .column_ld4
sub ecx, byte SIZEOF_MMWORD/4
movq mmF,mmA
movq mmA, MMWORD [esi+ecx*RGB_PIXELSIZE]
.column_ld4:
test cl, SIZEOF_MMWORD/2
mov ecx, SIZEOF_MMWORD
jz short .rgb_gray_cnv
movq mmD,mmA
movq mmC,mmF
movq mmA, MMWORD [esi+0*SIZEOF_MMWORD]
movq mmF, MMWORD [esi+1*SIZEOF_MMWORD]
jmp short .rgb_gray_cnv
alignx 16,7
.columnloop:
movq mmA, MMWORD [esi+0*SIZEOF_MMWORD]
movq mmF, MMWORD [esi+1*SIZEOF_MMWORD]
movq mmD, MMWORD [esi+2*SIZEOF_MMWORD]
movq mmC, MMWORD [esi+3*SIZEOF_MMWORD]
.rgb_gray_cnv:
; mmA=(00 10 20 30 01 11 21 31)
; mmF=(02 12 22 32 03 13 23 33)
; mmD=(04 14 24 34 05 15 25 35)
; mmC=(06 16 26 36 07 17 27 37)
movq mmB,mmA
punpcklbw mmA,mmF ; mmA=(00 02 10 12 20 22 30 32)
punpckhbw mmB,mmF ; mmB=(01 03 11 13 21 23 31 33)
movq mmG,mmD
punpcklbw mmD,mmC ; mmD=(04 06 14 16 24 26 34 36)
punpckhbw mmG,mmC ; mmG=(05 07 15 17 25 27 35 37)
movq mmE,mmA
punpcklwd mmA,mmD ; mmA=(00 02 04 06 10 12 14 16)
punpckhwd mmE,mmD ; mmE=(20 22 24 26 30 32 34 36)
movq mmH,mmB
punpcklwd mmB,mmG ; mmB=(01 03 05 07 11 13 15 17)
punpckhwd mmH,mmG ; mmH=(21 23 25 27 31 33 35 37)
pxor mmF,mmF
movq mmC,mmA
punpcklbw mmA,mmF ; mmA=(00 02 04 06)
punpckhbw mmC,mmF ; mmC=(10 12 14 16)
movq mmD,mmB
punpcklbw mmB,mmF ; mmB=(01 03 05 07)
punpckhbw mmD,mmF ; mmD=(11 13 15 17)
movq mmG,mmE
punpcklbw mmE,mmF ; mmE=(20 22 24 26)
punpckhbw mmG,mmF ; mmG=(30 32 34 36)
punpcklbw mmF,mmH
punpckhbw mmH,mmH
psrlw mmF,BYTE_BIT ; mmF=(21 23 25 27)
psrlw mmH,BYTE_BIT ; mmH=(31 33 35 37)
%endif ; RGB_PIXELSIZE ; ---------------
; mm0=(R0 R2 R4 R6)=RE, mm2=(G0 G2 G4 G6)=GE, mm4=(B0 B2 B4 B6)=BE
; mm1=(R1 R3 R5 R7)=RO, mm3=(G1 G3 G5 G7)=GO, mm5=(B1 B3 B5 B7)=BO
; (Original)
; Y = 0.29900 * R + 0.58700 * G + 0.11400 * B
;
; (This implementation)
; Y = 0.29900 * R + 0.33700 * G + 0.11400 * B + 0.25000 * G
movq mm6,mm1
punpcklwd mm1,mm3
punpckhwd mm6,mm3
pmaddwd mm1,[GOTOFF(eax,PW_F0299_F0337)] ; mm1=ROL*FIX(0.299)+GOL*FIX(0.337)
pmaddwd mm6,[GOTOFF(eax,PW_F0299_F0337)] ; mm6=ROH*FIX(0.299)+GOH*FIX(0.337)
movq mm7, mm6 ; mm7=ROH*FIX(0.299)+GOH*FIX(0.337)
movq mm6,mm0
punpcklwd mm0,mm2
punpckhwd mm6,mm2
pmaddwd mm0,[GOTOFF(eax,PW_F0299_F0337)] ; mm0=REL*FIX(0.299)+GEL*FIX(0.337)
pmaddwd mm6,[GOTOFF(eax,PW_F0299_F0337)] ; mm6=REH*FIX(0.299)+GEH*FIX(0.337)
movq MMWORD [wk(0)], mm0 ; wk(0)=REL*FIX(0.299)+GEL*FIX(0.337)
movq MMWORD [wk(1)], mm6 ; wk(1)=REH*FIX(0.299)+GEH*FIX(0.337)
movq mm0, mm5 ; mm0=BO
movq mm6, mm4 ; mm6=BE
movq mm4,mm0
punpcklwd mm0,mm3
punpckhwd mm4,mm3
pmaddwd mm0,[GOTOFF(eax,PW_F0114_F0250)] ; mm0=BOL*FIX(0.114)+GOL*FIX(0.250)
pmaddwd mm4,[GOTOFF(eax,PW_F0114_F0250)] ; mm4=BOH*FIX(0.114)+GOH*FIX(0.250)
movq mm3,[GOTOFF(eax,PD_ONEHALF)] ; mm3=[PD_ONEHALF]
paddd mm0, mm1
paddd mm4, mm7
paddd mm0,mm3
paddd mm4,mm3
psrld mm0,SCALEBITS ; mm0=YOL
psrld mm4,SCALEBITS ; mm4=YOH
packssdw mm0,mm4 ; mm0=YO
movq mm4,mm6
punpcklwd mm6,mm2
punpckhwd mm4,mm2
pmaddwd mm6,[GOTOFF(eax,PW_F0114_F0250)] ; mm6=BEL*FIX(0.114)+GEL*FIX(0.250)
pmaddwd mm4,[GOTOFF(eax,PW_F0114_F0250)] ; mm4=BEH*FIX(0.114)+GEH*FIX(0.250)
movq mm2,[GOTOFF(eax,PD_ONEHALF)] ; mm2=[PD_ONEHALF]
paddd mm6, MMWORD [wk(0)]
paddd mm4, MMWORD [wk(1)]
paddd mm6,mm2
paddd mm4,mm2
psrld mm6,SCALEBITS ; mm6=YEL
psrld mm4,SCALEBITS ; mm4=YEH
packssdw mm6,mm4 ; mm6=YE
psllw mm0,BYTE_BIT
por mm6,mm0 ; mm6=Y
movq MMWORD [edi], mm6 ; Save Y
sub ecx, byte SIZEOF_MMWORD
add esi, byte RGB_PIXELSIZE*SIZEOF_MMWORD ; inptr
add edi, byte SIZEOF_MMWORD ; outptr0
cmp ecx, byte SIZEOF_MMWORD
jae near .columnloop
test ecx,ecx
jnz near .column_ld1
pop ecx ; col
pop esi
pop edi
poppic eax
add esi, byte SIZEOF_JSAMPROW ; input_buf
add edi, byte SIZEOF_JSAMPROW
dec eax ; num_rows
jg near .rowloop
emms ; empty MMX state
.return:
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; need not be preserved
pop ebx
mov esp,ebp ; esp <- aligned ebp
pop esp ; esp <- original ebp
pop ebp
ret
; For some reason, the OS X linker does not honor the request to align the
; segment unless we do this.
align 16
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