| ; |
| ; jcgryext.asm - grayscale colorspace conversion (MMX) |
| ; |
| ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| ; Copyright 2011 D. R. Commander |
| ; |
| ; Based on |
| ; 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 |
