; ; jcgryext.asm - grayscale colorspace conversion (MMX) ; ; Copyright 2009 Pierre Ossman for Cendio AB ; Copyright (C) 2011, 2016, 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 32 GLOBAL_FUNCTION(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 32