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|
;
; jidctflt.asm - floating-point IDCT (SSE & MMX)
;
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
;
; 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
;
; This file contains a floating-point implementation of the inverse DCT
; (Discrete Cosine Transform). The following code is based directly on
; the IJG's original jidctflt.c; see the jidctflt.c for more details.
;
; [TAB8]
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
%macro unpcklps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(0 1 4 5)
shufps %1,%2,0x44
%endmacro
%macro unpckhps2 2 ; %1=(0 1 2 3) / %2=(4 5 6 7) => %1=(2 3 6 7)
shufps %1,%2,0xEE
%endmacro
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 16
global EXTN(jconst_idct_float_sse)
EXTN(jconst_idct_float_sse):
PD_1_414 times 4 dd 1.414213562373095048801689
PD_1_847 times 4 dd 1.847759065022573512256366
PD_1_082 times 4 dd 1.082392200292393968799446
PD_M2_613 times 4 dd -2.613125929752753055713286
PD_0_125 times 4 dd 0.125 ; 1/8
PB_CENTERJSAMP times 8 db CENTERJSAMPLE
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_float_sse (void *dct_table, JCOEFPTR coef_block,
; JSAMPARRAY output_buf, JDIMENSION output_col)
;
%define dct_table(b) (b)+8 ; void *dct_table
%define coef_block(b) (b)+12 ; JCOEFPTR coef_block
%define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
%define output_col(b) (b)+20 ; JDIMENSION output_col
%define original_ebp ebp+0
%define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
%define WK_NUM 2
%define workspace wk(0)-DCTSIZE2*SIZEOF_FAST_FLOAT
; FAST_FLOAT workspace[DCTSIZE2]
align 16
global EXTN(jsimd_idct_float_sse)
EXTN(jsimd_idct_float_sse):
push ebp
mov eax,esp ; eax = original ebp
sub esp, byte 4
and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
mov [esp],eax
mov ebp,esp ; ebp = aligned ebp
lea esp, [workspace]
push ebx
; push ecx ; need not be preserved
; push edx ; need not be preserved
push esi
push edi
get_GOT ebx ; get GOT address
; ---- Pass 1: process columns from input, store into work array.
; mov eax, [original_ebp]
mov edx, POINTER [dct_table(eax)] ; quantptr
mov esi, JCOEFPTR [coef_block(eax)] ; inptr
lea edi, [workspace] ; FAST_FLOAT *wsptr
mov ecx, DCTSIZE/4 ; ctr
alignx 16,7
.columnloop:
%ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE
mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
jnz near .columnDCT
movq mm0, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
por mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
por mm1, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
por mm0, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
por mm1, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
por mm0, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
por mm1,mm0
packsswb mm1,mm1
movd eax,mm1
test eax,eax
jnz short .columnDCT
; -- AC terms all zero
movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
punpckhwd mm1,mm0 ; mm1=(** 02 ** 03)
punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in0H=(02 03)
psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
cvtpi2ps xmm3,mm1 ; xmm3=(02 03 ** **)
cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **)
movlhps xmm0,xmm3 ; xmm0=in0=(00 01 02 03)
mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movaps xmm1,xmm0
movaps xmm2,xmm0
movaps xmm3,xmm0
shufps xmm0,xmm0,0x00 ; xmm0=(00 00 00 00)
shufps xmm1,xmm1,0x55 ; xmm1=(01 01 01 01)
shufps xmm2,xmm2,0xAA ; xmm2=(02 02 02 02)
shufps xmm3,xmm3,0xFF ; xmm3=(03 03 03 03)
movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm0
movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0
movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm2
movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm2
movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm3
movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
jmp near .nextcolumn
alignx 16,7
%endif
.columnDCT:
; -- Even part
movq mm0, MMWORD [MMBLOCK(0,0,esi,SIZEOF_JCOEF)]
movq mm1, MMWORD [MMBLOCK(2,0,esi,SIZEOF_JCOEF)]
movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
punpckhwd mm4,mm0 ; mm4=(** 02 ** 03)
punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
punpckhwd mm5,mm1 ; mm5=(** 22 ** 23)
punpcklwd mm1,mm1 ; mm1=(20 20 21 21)
psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in0H=(02 03)
psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in0L=(00 01)
cvtpi2ps xmm4,mm4 ; xmm4=(02 03 ** **)
cvtpi2ps xmm0,mm0 ; xmm0=(00 01 ** **)
psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in2H=(22 23)
psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in2L=(20 21)
cvtpi2ps xmm5,mm5 ; xmm5=(22 23 ** **)
cvtpi2ps xmm1,mm1 ; xmm1=(20 21 ** **)
punpckhwd mm6,mm2 ; mm6=(** 42 ** 43)
punpcklwd mm2,mm2 ; mm2=(40 40 41 41)
punpckhwd mm7,mm3 ; mm7=(** 62 ** 63)
punpcklwd mm3,mm3 ; mm3=(60 60 61 61)
psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in4H=(42 43)
psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in4L=(40 41)
cvtpi2ps xmm6,mm6 ; xmm6=(42 43 ** **)
cvtpi2ps xmm2,mm2 ; xmm2=(40 41 ** **)
psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in6H=(62 63)
psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in6L=(60 61)
cvtpi2ps xmm7,mm7 ; xmm7=(62 63 ** **)
cvtpi2ps xmm3,mm3 ; xmm3=(60 61 ** **)
movlhps xmm0,xmm4 ; xmm0=in0=(00 01 02 03)
movlhps xmm1,xmm5 ; xmm1=in2=(20 21 22 23)
mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movlhps xmm2,xmm6 ; xmm2=in4=(40 41 42 43)
movlhps xmm3,xmm7 ; xmm3=in6=(60 61 62 63)
mulps xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movaps xmm4,xmm0
movaps xmm5,xmm1
subps xmm0,xmm2 ; xmm0=tmp11
subps xmm1,xmm3
addps xmm4,xmm2 ; xmm4=tmp10
addps xmm5,xmm3 ; xmm5=tmp13
mulps xmm1,[GOTOFF(ebx,PD_1_414)]
subps xmm1,xmm5 ; xmm1=tmp12
movaps xmm6,xmm4
movaps xmm7,xmm0
subps xmm4,xmm5 ; xmm4=tmp3
subps xmm0,xmm1 ; xmm0=tmp2
addps xmm6,xmm5 ; xmm6=tmp0
addps xmm7,xmm1 ; xmm7=tmp1
movaps XMMWORD [wk(1)], xmm4 ; tmp3
movaps XMMWORD [wk(0)], xmm0 ; tmp2
; -- Odd part
movq mm4, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movq mm0, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
punpckhwd mm6,mm4 ; mm6=(** 12 ** 13)
punpcklwd mm4,mm4 ; mm4=(10 10 11 11)
punpckhwd mm2,mm0 ; mm2=(** 32 ** 33)
punpcklwd mm0,mm0 ; mm0=(30 30 31 31)
psrad mm6,(DWORD_BIT-WORD_BIT) ; mm6=in1H=(12 13)
psrad mm4,(DWORD_BIT-WORD_BIT) ; mm4=in1L=(10 11)
cvtpi2ps xmm4,mm6 ; xmm4=(12 13 ** **)
cvtpi2ps xmm2,mm4 ; xmm2=(10 11 ** **)
psrad mm2,(DWORD_BIT-WORD_BIT) ; mm2=in3H=(32 33)
psrad mm0,(DWORD_BIT-WORD_BIT) ; mm0=in3L=(30 31)
cvtpi2ps xmm0,mm2 ; xmm0=(32 33 ** **)
cvtpi2ps xmm3,mm0 ; xmm3=(30 31 ** **)
punpckhwd mm7,mm5 ; mm7=(** 52 ** 53)
punpcklwd mm5,mm5 ; mm5=(50 50 51 51)
punpckhwd mm3,mm1 ; mm3=(** 72 ** 73)
punpcklwd mm1,mm1 ; mm1=(70 70 71 71)
movlhps xmm2,xmm4 ; xmm2=in1=(10 11 12 13)
movlhps xmm3,xmm0 ; xmm3=in3=(30 31 32 33)
psrad mm7,(DWORD_BIT-WORD_BIT) ; mm7=in5H=(52 53)
psrad mm5,(DWORD_BIT-WORD_BIT) ; mm5=in5L=(50 51)
cvtpi2ps xmm4,mm7 ; xmm4=(52 53 ** **)
cvtpi2ps xmm5,mm5 ; xmm5=(50 51 ** **)
psrad mm3,(DWORD_BIT-WORD_BIT) ; mm3=in7H=(72 73)
psrad mm1,(DWORD_BIT-WORD_BIT) ; mm1=in7L=(70 71)
cvtpi2ps xmm0,mm3 ; xmm0=(72 73 ** **)
cvtpi2ps xmm1,mm1 ; xmm1=(70 71 ** **)
mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movlhps xmm5,xmm4 ; xmm5=in5=(50 51 52 53)
movlhps xmm1,xmm0 ; xmm1=in7=(70 71 72 73)
mulps xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
mulps xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_FLOAT_MULT_TYPE)]
movaps xmm4,xmm2
movaps xmm0,xmm5
addps xmm2,xmm1 ; xmm2=z11
addps xmm5,xmm3 ; xmm5=z13
subps xmm4,xmm1 ; xmm4=z12
subps xmm0,xmm3 ; xmm0=z10
movaps xmm1,xmm2
subps xmm2,xmm5
addps xmm1,xmm5 ; xmm1=tmp7
mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
movaps xmm3,xmm0
addps xmm0,xmm4
mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5
mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
addps xmm3,xmm0 ; xmm3=tmp12
subps xmm4,xmm0 ; xmm4=tmp10
; -- Final output stage
subps xmm3,xmm1 ; xmm3=tmp6
movaps xmm5,xmm6
movaps xmm0,xmm7
addps xmm6,xmm1 ; xmm6=data0=(00 01 02 03)
addps xmm7,xmm3 ; xmm7=data1=(10 11 12 13)
subps xmm5,xmm1 ; xmm5=data7=(70 71 72 73)
subps xmm0,xmm3 ; xmm0=data6=(60 61 62 63)
subps xmm2,xmm3 ; xmm2=tmp5
movaps xmm1,xmm6 ; transpose coefficients(phase 1)
unpcklps xmm6,xmm7 ; xmm6=(00 10 01 11)
unpckhps xmm1,xmm7 ; xmm1=(02 12 03 13)
movaps xmm3,xmm0 ; transpose coefficients(phase 1)
unpcklps xmm0,xmm5 ; xmm0=(60 70 61 71)
unpckhps xmm3,xmm5 ; xmm3=(62 72 63 73)
movaps xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
movaps xmm5, XMMWORD [wk(1)] ; xmm5=tmp3
movaps XMMWORD [wk(0)], xmm0 ; wk(0)=(60 70 61 71)
movaps XMMWORD [wk(1)], xmm3 ; wk(1)=(62 72 63 73)
addps xmm4,xmm2 ; xmm4=tmp4
movaps xmm0,xmm7
movaps xmm3,xmm5
addps xmm7,xmm2 ; xmm7=data2=(20 21 22 23)
addps xmm5,xmm4 ; xmm5=data4=(40 41 42 43)
subps xmm0,xmm2 ; xmm0=data5=(50 51 52 53)
subps xmm3,xmm4 ; xmm3=data3=(30 31 32 33)
movaps xmm2,xmm7 ; transpose coefficients(phase 1)
unpcklps xmm7,xmm3 ; xmm7=(20 30 21 31)
unpckhps xmm2,xmm3 ; xmm2=(22 32 23 33)
movaps xmm4,xmm5 ; transpose coefficients(phase 1)
unpcklps xmm5,xmm0 ; xmm5=(40 50 41 51)
unpckhps xmm4,xmm0 ; xmm4=(42 52 43 53)
movaps xmm3,xmm6 ; transpose coefficients(phase 2)
unpcklps2 xmm6,xmm7 ; xmm6=(00 10 20 30)
unpckhps2 xmm3,xmm7 ; xmm3=(01 11 21 31)
movaps xmm0,xmm1 ; transpose coefficients(phase 2)
unpcklps2 xmm1,xmm2 ; xmm1=(02 12 22 32)
unpckhps2 xmm0,xmm2 ; xmm0=(03 13 23 33)
movaps xmm7, XMMWORD [wk(0)] ; xmm7=(60 70 61 71)
movaps xmm2, XMMWORD [wk(1)] ; xmm2=(62 72 63 73)
movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm6
movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3
movaps XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_FAST_FLOAT)], xmm1
movaps XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_FAST_FLOAT)], xmm0
movaps xmm6,xmm5 ; transpose coefficients(phase 2)
unpcklps2 xmm5,xmm7 ; xmm5=(40 50 60 70)
unpckhps2 xmm6,xmm7 ; xmm6=(41 51 61 71)
movaps xmm3,xmm4 ; transpose coefficients(phase 2)
unpcklps2 xmm4,xmm2 ; xmm4=(42 52 62 72)
unpckhps2 xmm3,xmm2 ; xmm3=(43 53 63 73)
movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm5
movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm6
movaps XMMWORD [XMMBLOCK(2,1,edi,SIZEOF_FAST_FLOAT)], xmm4
movaps XMMWORD [XMMBLOCK(3,1,edi,SIZEOF_FAST_FLOAT)], xmm3
.nextcolumn:
add esi, byte 4*SIZEOF_JCOEF ; coef_block
add edx, byte 4*SIZEOF_FLOAT_MULT_TYPE ; quantptr
add edi, 4*DCTSIZE*SIZEOF_FAST_FLOAT ; wsptr
dec ecx ; ctr
jnz near .columnloop
; -- Prefetch the next coefficient block
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 0*32]
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 1*32]
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 2*32]
prefetchnta [esi + (DCTSIZE2-8)*SIZEOF_JCOEF + 3*32]
; ---- Pass 2: process rows from work array, store into output array.
mov eax, [original_ebp]
lea esi, [workspace] ; FAST_FLOAT *wsptr
mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
mov eax, JDIMENSION [output_col(eax)]
mov ecx, DCTSIZE/4 ; ctr
alignx 16,7
.rowloop:
; -- Even part
movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm4,xmm0
movaps xmm5,xmm1
subps xmm0,xmm2 ; xmm0=tmp11
subps xmm1,xmm3
addps xmm4,xmm2 ; xmm4=tmp10
addps xmm5,xmm3 ; xmm5=tmp13
mulps xmm1,[GOTOFF(ebx,PD_1_414)]
subps xmm1,xmm5 ; xmm1=tmp12
movaps xmm6,xmm4
movaps xmm7,xmm0
subps xmm4,xmm5 ; xmm4=tmp3
subps xmm0,xmm1 ; xmm0=tmp2
addps xmm6,xmm5 ; xmm6=tmp0
addps xmm7,xmm1 ; xmm7=tmp1
movaps XMMWORD [wk(1)], xmm4 ; tmp3
movaps XMMWORD [wk(0)], xmm0 ; tmp2
; -- Odd part
movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_FAST_FLOAT)]
movaps xmm4,xmm2
movaps xmm0,xmm5
addps xmm2,xmm1 ; xmm2=z11
addps xmm5,xmm3 ; xmm5=z13
subps xmm4,xmm1 ; xmm4=z12
subps xmm0,xmm3 ; xmm0=z10
movaps xmm1,xmm2
subps xmm2,xmm5
addps xmm1,xmm5 ; xmm1=tmp7
mulps xmm2,[GOTOFF(ebx,PD_1_414)] ; xmm2=tmp11
movaps xmm3,xmm0
addps xmm0,xmm4
mulps xmm0,[GOTOFF(ebx,PD_1_847)] ; xmm0=z5
mulps xmm3,[GOTOFF(ebx,PD_M2_613)] ; xmm3=(z10 * -2.613125930)
mulps xmm4,[GOTOFF(ebx,PD_1_082)] ; xmm4=(z12 * 1.082392200)
addps xmm3,xmm0 ; xmm3=tmp12
subps xmm4,xmm0 ; xmm4=tmp10
; -- Final output stage
subps xmm3,xmm1 ; xmm3=tmp6
movaps xmm5,xmm6
movaps xmm0,xmm7
addps xmm6,xmm1 ; xmm6=data0=(00 10 20 30)
addps xmm7,xmm3 ; xmm7=data1=(01 11 21 31)
subps xmm5,xmm1 ; xmm5=data7=(07 17 27 37)
subps xmm0,xmm3 ; xmm0=data6=(06 16 26 36)
subps xmm2,xmm3 ; xmm2=tmp5
movaps xmm1,[GOTOFF(ebx,PD_0_125)] ; xmm1=[PD_0_125]
mulps xmm6,xmm1 ; descale(1/8)
mulps xmm7,xmm1 ; descale(1/8)
mulps xmm5,xmm1 ; descale(1/8)
mulps xmm0,xmm1 ; descale(1/8)
movhlps xmm3,xmm6
movhlps xmm1,xmm7
cvtps2pi mm0,xmm6 ; round to int32, mm0=data0L=(00 10)
cvtps2pi mm1,xmm7 ; round to int32, mm1=data1L=(01 11)
cvtps2pi mm2,xmm3 ; round to int32, mm2=data0H=(20 30)
cvtps2pi mm3,xmm1 ; round to int32, mm3=data1H=(21 31)
packssdw mm0,mm2 ; mm0=data0=(00 10 20 30)
packssdw mm1,mm3 ; mm1=data1=(01 11 21 31)
movhlps xmm6,xmm5
movhlps xmm7,xmm0
cvtps2pi mm4,xmm5 ; round to int32, mm4=data7L=(07 17)
cvtps2pi mm5,xmm0 ; round to int32, mm5=data6L=(06 16)
cvtps2pi mm6,xmm6 ; round to int32, mm6=data7H=(27 37)
cvtps2pi mm7,xmm7 ; round to int32, mm7=data6H=(26 36)
packssdw mm4,mm6 ; mm4=data7=(07 17 27 37)
packssdw mm5,mm7 ; mm5=data6=(06 16 26 36)
packsswb mm0,mm5 ; mm0=(00 10 20 30 06 16 26 36)
packsswb mm1,mm4 ; mm1=(01 11 21 31 07 17 27 37)
movaps xmm3, XMMWORD [wk(0)] ; xmm3=tmp2
movaps xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
movaps xmm6,[GOTOFF(ebx,PD_0_125)] ; xmm6=[PD_0_125]
addps xmm4,xmm2 ; xmm4=tmp4
movaps xmm5,xmm3
movaps xmm0,xmm1
addps xmm3,xmm2 ; xmm3=data2=(02 12 22 32)
addps xmm1,xmm4 ; xmm1=data4=(04 14 24 34)
subps xmm5,xmm2 ; xmm5=data5=(05 15 25 35)
subps xmm0,xmm4 ; xmm0=data3=(03 13 23 33)
mulps xmm3,xmm6 ; descale(1/8)
mulps xmm1,xmm6 ; descale(1/8)
mulps xmm5,xmm6 ; descale(1/8)
mulps xmm0,xmm6 ; descale(1/8)
movhlps xmm7,xmm3
movhlps xmm2,xmm1
cvtps2pi mm2,xmm3 ; round to int32, mm2=data2L=(02 12)
cvtps2pi mm3,xmm1 ; round to int32, mm3=data4L=(04 14)
cvtps2pi mm6,xmm7 ; round to int32, mm6=data2H=(22 32)
cvtps2pi mm7,xmm2 ; round to int32, mm7=data4H=(24 34)
packssdw mm2,mm6 ; mm2=data2=(02 12 22 32)
packssdw mm3,mm7 ; mm3=data4=(04 14 24 34)
movhlps xmm4,xmm5
movhlps xmm6,xmm0
cvtps2pi mm5,xmm5 ; round to int32, mm5=data5L=(05 15)
cvtps2pi mm4,xmm0 ; round to int32, mm4=data3L=(03 13)
cvtps2pi mm6,xmm4 ; round to int32, mm6=data5H=(25 35)
cvtps2pi mm7,xmm6 ; round to int32, mm7=data3H=(23 33)
packssdw mm5,mm6 ; mm5=data5=(05 15 25 35)
packssdw mm4,mm7 ; mm4=data3=(03 13 23 33)
movq mm6,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm6=[PB_CENTERJSAMP]
packsswb mm2,mm3 ; mm2=(02 12 22 32 04 14 24 34)
packsswb mm4,mm5 ; mm4=(03 13 23 33 05 15 25 35)
paddb mm0,mm6
paddb mm1,mm6
paddb mm2,mm6
paddb mm4,mm6
movq mm7,mm0 ; transpose coefficients(phase 1)
punpcklbw mm0,mm1 ; mm0=(00 01 10 11 20 21 30 31)
punpckhbw mm7,mm1 ; mm7=(06 07 16 17 26 27 36 37)
movq mm3,mm2 ; transpose coefficients(phase 1)
punpcklbw mm2,mm4 ; mm2=(02 03 12 13 22 23 32 33)
punpckhbw mm3,mm4 ; mm3=(04 05 14 15 24 25 34 35)
movq mm5,mm0 ; transpose coefficients(phase 2)
punpcklwd mm0,mm2 ; mm0=(00 01 02 03 10 11 12 13)
punpckhwd mm5,mm2 ; mm5=(20 21 22 23 30 31 32 33)
movq mm6,mm3 ; transpose coefficients(phase 2)
punpcklwd mm3,mm7 ; mm3=(04 05 06 07 14 15 16 17)
punpckhwd mm6,mm7 ; mm6=(24 25 26 27 34 35 36 37)
movq mm1,mm0 ; transpose coefficients(phase 3)
punpckldq mm0,mm3 ; mm0=(00 01 02 03 04 05 06 07)
punpckhdq mm1,mm3 ; mm1=(10 11 12 13 14 15 16 17)
movq mm4,mm5 ; transpose coefficients(phase 3)
punpckldq mm5,mm6 ; mm5=(20 21 22 23 24 25 26 27)
punpckhdq mm4,mm6 ; mm4=(30 31 32 33 34 35 36 37)
pushpic ebx ; save GOT address
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
mov ebx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm0
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm1
mov edx, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
mov ebx, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
movq MMWORD [edx+eax*SIZEOF_JSAMPLE], mm5
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm4
poppic ebx ; restore GOT address
add esi, byte 4*SIZEOF_FAST_FLOAT ; wsptr
add edi, byte 4*SIZEOF_JSAMPROW
dec ecx ; ctr
jnz near .rowloop
emms ; empty MMX state
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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