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|
;
; jcgryext.asm - grayscale colorspace conversion (MMX)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> 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
%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
|
