зеркало из https://github.com/mozilla/mozjpeg.git
498 строки
14 KiB
NASM
498 строки
14 KiB
NASM
;
|
|
; jimmxfst.asm - fast integer IDCT (MMX)
|
|
;
|
|
; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
|
|
;
|
|
; 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
|
|
;
|
|
; This file contains a fast, not so accurate integer implementation of
|
|
; the inverse DCT (Discrete Cosine Transform). The following code is
|
|
; based directly on the IJG's original jidctfst.c; see the jidctfst.c
|
|
; for more details.
|
|
;
|
|
; [TAB8]
|
|
|
|
%include "jsimdext.inc"
|
|
%include "jdct.inc"
|
|
|
|
; --------------------------------------------------------------------------
|
|
|
|
%define CONST_BITS 8 ; 14 is also OK.
|
|
%define PASS1_BITS 2
|
|
|
|
%if IFAST_SCALE_BITS != PASS1_BITS
|
|
%error "'IFAST_SCALE_BITS' must be equal to 'PASS1_BITS'."
|
|
%endif
|
|
|
|
%if CONST_BITS == 8
|
|
F_1_082 equ 277 ; FIX(1.082392200)
|
|
F_1_414 equ 362 ; FIX(1.414213562)
|
|
F_1_847 equ 473 ; FIX(1.847759065)
|
|
F_2_613 equ 669 ; FIX(2.613125930)
|
|
F_1_613 equ (F_2_613 - 256) ; FIX(2.613125930) - FIX(1)
|
|
%else
|
|
; NASM cannot do compile-time arithmetic on floating-point constants.
|
|
%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
|
|
F_1_082 equ DESCALE(1162209775,30-CONST_BITS) ; FIX(1.082392200)
|
|
F_1_414 equ DESCALE(1518500249,30-CONST_BITS) ; FIX(1.414213562)
|
|
F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
|
|
F_2_613 equ DESCALE(2805822602,30-CONST_BITS) ; FIX(2.613125930)
|
|
F_1_613 equ (F_2_613 - (1 << CONST_BITS)) ; FIX(2.613125930) - FIX(1)
|
|
%endif
|
|
|
|
; --------------------------------------------------------------------------
|
|
SECTION SEG_CONST
|
|
|
|
; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
|
|
; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
|
|
|
|
%define PRE_MULTIPLY_SCALE_BITS 2
|
|
%define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
|
|
|
|
alignz 16
|
|
global EXTN(jconst_idct_ifast_mmx)
|
|
|
|
EXTN(jconst_idct_ifast_mmx):
|
|
|
|
PW_F1414 times 4 dw F_1_414 << CONST_SHIFT
|
|
PW_F1847 times 4 dw F_1_847 << CONST_SHIFT
|
|
PW_MF1613 times 4 dw -F_1_613 << CONST_SHIFT
|
|
PW_F1082 times 4 dw F_1_082 << CONST_SHIFT
|
|
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_ifast_mmx (void * dct_table, JCOEFPTR coef_block,
|
|
; JSAMPARRAY output_buf, JDIMENSION output_col)
|
|
;
|
|
|
|
%define dct_table(b) (b)+8 ; jpeg_component_info * compptr
|
|
%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_MMWORD ; mmword wk[WK_NUM]
|
|
%define WK_NUM 2
|
|
%define workspace wk(0)-DCTSIZE2*SIZEOF_JCOEF
|
|
; JCOEF workspace[DCTSIZE2]
|
|
|
|
align 16
|
|
global EXTN(jsimd_idct_ifast_mmx)
|
|
|
|
EXTN(jsimd_idct_ifast_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, [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] ; JCOEF * wsptr
|
|
mov ecx, DCTSIZE/4 ; ctr
|
|
alignx 16,7
|
|
.columnloop:
|
|
%ifndef NO_ZERO_COLUMN_TEST_IFAST_MMX
|
|
mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
|
|
or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
|
|
jnz short .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)]
|
|
pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
|
|
movq mm2,mm0 ; mm0=in0=(00 01 02 03)
|
|
punpcklwd mm0,mm0 ; mm0=(00 00 01 01)
|
|
punpckhwd mm2,mm2 ; mm2=(02 02 03 03)
|
|
|
|
movq mm1,mm0
|
|
punpckldq mm0,mm0 ; mm0=(00 00 00 00)
|
|
punpckhdq mm1,mm1 ; mm1=(01 01 01 01)
|
|
movq mm3,mm2
|
|
punpckldq mm2,mm2 ; mm2=(02 02 02 02)
|
|
punpckhdq mm3,mm3 ; mm3=(03 03 03 03)
|
|
|
|
movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm0
|
|
movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm0
|
|
movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm1
|
|
movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm1
|
|
movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm2
|
|
movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2
|
|
movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm3
|
|
movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm3
|
|
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)]
|
|
pmullw mm0, MMWORD [MMBLOCK(0,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
pmullw mm1, MMWORD [MMBLOCK(2,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
movq mm2, MMWORD [MMBLOCK(4,0,esi,SIZEOF_JCOEF)]
|
|
movq mm3, MMWORD [MMBLOCK(6,0,esi,SIZEOF_JCOEF)]
|
|
pmullw mm2, MMWORD [MMBLOCK(4,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
pmullw mm3, MMWORD [MMBLOCK(6,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
|
|
movq mm4,mm0
|
|
movq mm5,mm1
|
|
psubw mm0,mm2 ; mm0=tmp11
|
|
psubw mm1,mm3
|
|
paddw mm4,mm2 ; mm4=tmp10
|
|
paddw mm5,mm3 ; mm5=tmp13
|
|
|
|
psllw mm1,PRE_MULTIPLY_SCALE_BITS
|
|
pmulhw mm1,[GOTOFF(ebx,PW_F1414)]
|
|
psubw mm1,mm5 ; mm1=tmp12
|
|
|
|
movq mm6,mm4
|
|
movq mm7,mm0
|
|
psubw mm4,mm5 ; mm4=tmp3
|
|
psubw mm0,mm1 ; mm0=tmp2
|
|
paddw mm6,mm5 ; mm6=tmp0
|
|
paddw mm7,mm1 ; mm7=tmp1
|
|
|
|
movq MMWORD [wk(1)], mm4 ; wk(1)=tmp3
|
|
movq MMWORD [wk(0)], mm0 ; wk(0)=tmp2
|
|
|
|
; -- Odd part
|
|
|
|
movq mm2, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
|
|
movq mm3, MMWORD [MMBLOCK(3,0,esi,SIZEOF_JCOEF)]
|
|
pmullw mm2, MMWORD [MMBLOCK(1,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
pmullw mm3, MMWORD [MMBLOCK(3,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
movq mm5, MMWORD [MMBLOCK(5,0,esi,SIZEOF_JCOEF)]
|
|
movq mm1, MMWORD [MMBLOCK(7,0,esi,SIZEOF_JCOEF)]
|
|
pmullw mm5, MMWORD [MMBLOCK(5,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
pmullw mm1, MMWORD [MMBLOCK(7,0,edx,SIZEOF_IFAST_MULT_TYPE)]
|
|
|
|
movq mm4,mm2
|
|
movq mm0,mm5
|
|
psubw mm2,mm1 ; mm2=z12
|
|
psubw mm5,mm3 ; mm5=z10
|
|
paddw mm4,mm1 ; mm4=z11
|
|
paddw mm0,mm3 ; mm0=z13
|
|
|
|
movq mm1,mm5 ; mm1=z10(unscaled)
|
|
psllw mm2,PRE_MULTIPLY_SCALE_BITS
|
|
psllw mm5,PRE_MULTIPLY_SCALE_BITS
|
|
|
|
movq mm3,mm4
|
|
psubw mm4,mm0
|
|
paddw mm3,mm0 ; mm3=tmp7
|
|
|
|
psllw mm4,PRE_MULTIPLY_SCALE_BITS
|
|
pmulhw mm4,[GOTOFF(ebx,PW_F1414)] ; mm4=tmp11
|
|
|
|
; To avoid overflow...
|
|
;
|
|
; (Original)
|
|
; tmp12 = -2.613125930 * z10 + z5;
|
|
;
|
|
; (This implementation)
|
|
; tmp12 = (-1.613125930 - 1) * z10 + z5;
|
|
; = -1.613125930 * z10 - z10 + z5;
|
|
|
|
movq mm0,mm5
|
|
paddw mm5,mm2
|
|
pmulhw mm5,[GOTOFF(ebx,PW_F1847)] ; mm5=z5
|
|
pmulhw mm0,[GOTOFF(ebx,PW_MF1613)]
|
|
pmulhw mm2,[GOTOFF(ebx,PW_F1082)]
|
|
psubw mm0,mm1
|
|
psubw mm2,mm5 ; mm2=tmp10
|
|
paddw mm0,mm5 ; mm0=tmp12
|
|
|
|
; -- Final output stage
|
|
|
|
psubw mm0,mm3 ; mm0=tmp6
|
|
movq mm1,mm6
|
|
movq mm5,mm7
|
|
paddw mm6,mm3 ; mm6=data0=(00 01 02 03)
|
|
paddw mm7,mm0 ; mm7=data1=(10 11 12 13)
|
|
psubw mm1,mm3 ; mm1=data7=(70 71 72 73)
|
|
psubw mm5,mm0 ; mm5=data6=(60 61 62 63)
|
|
psubw mm4,mm0 ; mm4=tmp5
|
|
|
|
movq mm3,mm6 ; transpose coefficients(phase 1)
|
|
punpcklwd mm6,mm7 ; mm6=(00 10 01 11)
|
|
punpckhwd mm3,mm7 ; mm3=(02 12 03 13)
|
|
movq mm0,mm5 ; transpose coefficients(phase 1)
|
|
punpcklwd mm5,mm1 ; mm5=(60 70 61 71)
|
|
punpckhwd mm0,mm1 ; mm0=(62 72 63 73)
|
|
|
|
movq mm7, MMWORD [wk(0)] ; mm7=tmp2
|
|
movq mm1, MMWORD [wk(1)] ; mm1=tmp3
|
|
|
|
movq MMWORD [wk(0)], mm5 ; wk(0)=(60 70 61 71)
|
|
movq MMWORD [wk(1)], mm0 ; wk(1)=(62 72 63 73)
|
|
|
|
paddw mm2,mm4 ; mm2=tmp4
|
|
movq mm5,mm7
|
|
movq mm0,mm1
|
|
paddw mm7,mm4 ; mm7=data2=(20 21 22 23)
|
|
paddw mm1,mm2 ; mm1=data4=(40 41 42 43)
|
|
psubw mm5,mm4 ; mm5=data5=(50 51 52 53)
|
|
psubw mm0,mm2 ; mm0=data3=(30 31 32 33)
|
|
|
|
movq mm4,mm7 ; transpose coefficients(phase 1)
|
|
punpcklwd mm7,mm0 ; mm7=(20 30 21 31)
|
|
punpckhwd mm4,mm0 ; mm4=(22 32 23 33)
|
|
movq mm2,mm1 ; transpose coefficients(phase 1)
|
|
punpcklwd mm1,mm5 ; mm1=(40 50 41 51)
|
|
punpckhwd mm2,mm5 ; mm2=(42 52 43 53)
|
|
|
|
movq mm0,mm6 ; transpose coefficients(phase 2)
|
|
punpckldq mm6,mm7 ; mm6=(00 10 20 30)
|
|
punpckhdq mm0,mm7 ; mm0=(01 11 21 31)
|
|
movq mm5,mm3 ; transpose coefficients(phase 2)
|
|
punpckldq mm3,mm4 ; mm3=(02 12 22 32)
|
|
punpckhdq mm5,mm4 ; mm5=(03 13 23 33)
|
|
|
|
movq mm7, MMWORD [wk(0)] ; mm7=(60 70 61 71)
|
|
movq mm4, MMWORD [wk(1)] ; mm4=(62 72 63 73)
|
|
|
|
movq MMWORD [MMBLOCK(0,0,edi,SIZEOF_JCOEF)], mm6
|
|
movq MMWORD [MMBLOCK(1,0,edi,SIZEOF_JCOEF)], mm0
|
|
movq MMWORD [MMBLOCK(2,0,edi,SIZEOF_JCOEF)], mm3
|
|
movq MMWORD [MMBLOCK(3,0,edi,SIZEOF_JCOEF)], mm5
|
|
|
|
movq mm6,mm1 ; transpose coefficients(phase 2)
|
|
punpckldq mm1,mm7 ; mm1=(40 50 60 70)
|
|
punpckhdq mm6,mm7 ; mm6=(41 51 61 71)
|
|
movq mm0,mm2 ; transpose coefficients(phase 2)
|
|
punpckldq mm2,mm4 ; mm2=(42 52 62 72)
|
|
punpckhdq mm0,mm4 ; mm0=(43 53 63 73)
|
|
|
|
movq MMWORD [MMBLOCK(0,1,edi,SIZEOF_JCOEF)], mm1
|
|
movq MMWORD [MMBLOCK(1,1,edi,SIZEOF_JCOEF)], mm6
|
|
movq MMWORD [MMBLOCK(2,1,edi,SIZEOF_JCOEF)], mm2
|
|
movq MMWORD [MMBLOCK(3,1,edi,SIZEOF_JCOEF)], mm0
|
|
|
|
.nextcolumn:
|
|
add esi, byte 4*SIZEOF_JCOEF ; coef_block
|
|
add edx, byte 4*SIZEOF_IFAST_MULT_TYPE ; quantptr
|
|
add edi, byte 4*DCTSIZE*SIZEOF_JCOEF ; wsptr
|
|
dec ecx ; ctr
|
|
jnz near .columnloop
|
|
|
|
; ---- Pass 2: process rows from work array, store into output array.
|
|
|
|
mov eax, [original_ebp]
|
|
lea esi, [workspace] ; JCOEF * 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
|
|
|
|
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)]
|
|
|
|
movq mm4,mm0
|
|
movq mm5,mm1
|
|
psubw mm0,mm2 ; mm0=tmp11
|
|
psubw mm1,mm3
|
|
paddw mm4,mm2 ; mm4=tmp10
|
|
paddw mm5,mm3 ; mm5=tmp13
|
|
|
|
psllw mm1,PRE_MULTIPLY_SCALE_BITS
|
|
pmulhw mm1,[GOTOFF(ebx,PW_F1414)]
|
|
psubw mm1,mm5 ; mm1=tmp12
|
|
|
|
movq mm6,mm4
|
|
movq mm7,mm0
|
|
psubw mm4,mm5 ; mm4=tmp3
|
|
psubw mm0,mm1 ; mm0=tmp2
|
|
paddw mm6,mm5 ; mm6=tmp0
|
|
paddw mm7,mm1 ; mm7=tmp1
|
|
|
|
movq MMWORD [wk(1)], mm4 ; wk(1)=tmp3
|
|
movq MMWORD [wk(0)], mm0 ; wk(0)=tmp2
|
|
|
|
; -- Odd part
|
|
|
|
movq mm2, MMWORD [MMBLOCK(1,0,esi,SIZEOF_JCOEF)]
|
|
movq mm3, 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)]
|
|
|
|
movq mm4,mm2
|
|
movq mm0,mm5
|
|
psubw mm2,mm1 ; mm2=z12
|
|
psubw mm5,mm3 ; mm5=z10
|
|
paddw mm4,mm1 ; mm4=z11
|
|
paddw mm0,mm3 ; mm0=z13
|
|
|
|
movq mm1,mm5 ; mm1=z10(unscaled)
|
|
psllw mm2,PRE_MULTIPLY_SCALE_BITS
|
|
psllw mm5,PRE_MULTIPLY_SCALE_BITS
|
|
|
|
movq mm3,mm4
|
|
psubw mm4,mm0
|
|
paddw mm3,mm0 ; mm3=tmp7
|
|
|
|
psllw mm4,PRE_MULTIPLY_SCALE_BITS
|
|
pmulhw mm4,[GOTOFF(ebx,PW_F1414)] ; mm4=tmp11
|
|
|
|
; To avoid overflow...
|
|
;
|
|
; (Original)
|
|
; tmp12 = -2.613125930 * z10 + z5;
|
|
;
|
|
; (This implementation)
|
|
; tmp12 = (-1.613125930 - 1) * z10 + z5;
|
|
; = -1.613125930 * z10 - z10 + z5;
|
|
|
|
movq mm0,mm5
|
|
paddw mm5,mm2
|
|
pmulhw mm5,[GOTOFF(ebx,PW_F1847)] ; mm5=z5
|
|
pmulhw mm0,[GOTOFF(ebx,PW_MF1613)]
|
|
pmulhw mm2,[GOTOFF(ebx,PW_F1082)]
|
|
psubw mm0,mm1
|
|
psubw mm2,mm5 ; mm2=tmp10
|
|
paddw mm0,mm5 ; mm0=tmp12
|
|
|
|
; -- Final output stage
|
|
|
|
psubw mm0,mm3 ; mm0=tmp6
|
|
movq mm1,mm6
|
|
movq mm5,mm7
|
|
paddw mm6,mm3 ; mm6=data0=(00 10 20 30)
|
|
paddw mm7,mm0 ; mm7=data1=(01 11 21 31)
|
|
psraw mm6,(PASS1_BITS+3) ; descale
|
|
psraw mm7,(PASS1_BITS+3) ; descale
|
|
psubw mm1,mm3 ; mm1=data7=(07 17 27 37)
|
|
psubw mm5,mm0 ; mm5=data6=(06 16 26 36)
|
|
psraw mm1,(PASS1_BITS+3) ; descale
|
|
psraw mm5,(PASS1_BITS+3) ; descale
|
|
psubw mm4,mm0 ; mm4=tmp5
|
|
|
|
packsswb mm6,mm5 ; mm6=(00 10 20 30 06 16 26 36)
|
|
packsswb mm7,mm1 ; mm7=(01 11 21 31 07 17 27 37)
|
|
|
|
movq mm3, MMWORD [wk(0)] ; mm3=tmp2
|
|
movq mm0, MMWORD [wk(1)] ; mm0=tmp3
|
|
|
|
paddw mm2,mm4 ; mm2=tmp4
|
|
movq mm5,mm3
|
|
movq mm1,mm0
|
|
paddw mm3,mm4 ; mm3=data2=(02 12 22 32)
|
|
paddw mm0,mm2 ; mm0=data4=(04 14 24 34)
|
|
psraw mm3,(PASS1_BITS+3) ; descale
|
|
psraw mm0,(PASS1_BITS+3) ; descale
|
|
psubw mm5,mm4 ; mm5=data5=(05 15 25 35)
|
|
psubw mm1,mm2 ; mm1=data3=(03 13 23 33)
|
|
psraw mm5,(PASS1_BITS+3) ; descale
|
|
psraw mm1,(PASS1_BITS+3) ; descale
|
|
|
|
movq mm4,[GOTOFF(ebx,PB_CENTERJSAMP)] ; mm4=[PB_CENTERJSAMP]
|
|
|
|
packsswb mm3,mm0 ; mm3=(02 12 22 32 04 14 24 34)
|
|
packsswb mm1,mm5 ; mm1=(03 13 23 33 05 15 25 35)
|
|
|
|
paddb mm6,mm4
|
|
paddb mm7,mm4
|
|
paddb mm3,mm4
|
|
paddb mm1,mm4
|
|
|
|
movq mm2,mm6 ; transpose coefficients(phase 1)
|
|
punpcklbw mm6,mm7 ; mm6=(00 01 10 11 20 21 30 31)
|
|
punpckhbw mm2,mm7 ; mm2=(06 07 16 17 26 27 36 37)
|
|
movq mm0,mm3 ; transpose coefficients(phase 1)
|
|
punpcklbw mm3,mm1 ; mm3=(02 03 12 13 22 23 32 33)
|
|
punpckhbw mm0,mm1 ; mm0=(04 05 14 15 24 25 34 35)
|
|
|
|
movq mm5,mm6 ; transpose coefficients(phase 2)
|
|
punpcklwd mm6,mm3 ; mm6=(00 01 02 03 10 11 12 13)
|
|
punpckhwd mm5,mm3 ; mm5=(20 21 22 23 30 31 32 33)
|
|
movq mm4,mm0 ; transpose coefficients(phase 2)
|
|
punpcklwd mm0,mm2 ; mm0=(04 05 06 07 14 15 16 17)
|
|
punpckhwd mm4,mm2 ; mm4=(24 25 26 27 34 35 36 37)
|
|
|
|
movq mm7,mm6 ; transpose coefficients(phase 3)
|
|
punpckldq mm6,mm0 ; mm6=(00 01 02 03 04 05 06 07)
|
|
punpckhdq mm7,mm0 ; mm7=(10 11 12 13 14 15 16 17)
|
|
movq mm1,mm5 ; transpose coefficients(phase 3)
|
|
punpckldq mm5,mm4 ; mm5=(20 21 22 23 24 25 26 27)
|
|
punpckhdq mm1,mm4 ; mm1=(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], mm6
|
|
movq MMWORD [ebx+eax*SIZEOF_JSAMPLE], mm7
|
|
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], mm1
|
|
|
|
poppic ebx ; restore GOT address
|
|
|
|
add esi, byte 4*SIZEOF_JCOEF ; 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
|
|
|