;
; jidctint.asm - accurate integer IDCT (SSE2)
;
; 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 slow-but-accurate integer implementation of the
; inverse DCT (Discrete Cosine Transform). The following code is based
; directly on the IJG's original jidctint.c; see the jidctint.c for
; more details.
;
; [TAB8]
%include "jsimdext.inc"
%include "jdct.inc"
; --------------------------------------------------------------------------
%define CONST_BITS 13
%define PASS1_BITS 2
%define DESCALE_P1 (CONST_BITS-PASS1_BITS)
%define DESCALE_P2 (CONST_BITS+PASS1_BITS+3)
%if CONST_BITS == 13
F_0_298 equ 2446 ; FIX(0.298631336)
F_0_390 equ 3196 ; FIX(0.390180644)
F_0_541 equ 4433 ; FIX(0.541196100)
F_0_765 equ 6270 ; FIX(0.765366865)
F_0_899 equ 7373 ; FIX(0.899976223)
F_1_175 equ 9633 ; FIX(1.175875602)
F_1_501 equ 12299 ; FIX(1.501321110)
F_1_847 equ 15137 ; FIX(1.847759065)
F_1_961 equ 16069 ; FIX(1.961570560)
F_2_053 equ 16819 ; FIX(2.053119869)
F_2_562 equ 20995 ; FIX(2.562915447)
F_3_072 equ 25172 ; FIX(3.072711026)
%else
; NASM cannot do compile-time arithmetic on floating-point constants.
%define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
F_0_298 equ DESCALE( 320652955,30-CONST_BITS) ; FIX(0.298631336)
F_0_390 equ DESCALE( 418953276,30-CONST_BITS) ; FIX(0.390180644)
F_0_541 equ DESCALE( 581104887,30-CONST_BITS) ; FIX(0.541196100)
F_0_765 equ DESCALE( 821806413,30-CONST_BITS) ; FIX(0.765366865)
F_0_899 equ DESCALE( 966342111,30-CONST_BITS) ; FIX(0.899976223)
F_1_175 equ DESCALE(1262586813,30-CONST_BITS) ; FIX(1.175875602)
F_1_501 equ DESCALE(1612031267,30-CONST_BITS) ; FIX(1.501321110)
F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
F_1_961 equ DESCALE(2106220350,30-CONST_BITS) ; FIX(1.961570560)
F_2_053 equ DESCALE(2204520673,30-CONST_BITS) ; FIX(2.053119869)
F_2_562 equ DESCALE(2751909506,30-CONST_BITS) ; FIX(2.562915447)
F_3_072 equ DESCALE(3299298341,30-CONST_BITS) ; FIX(3.072711026)
%endif
; --------------------------------------------------------------------------
SECTION SEG_CONST
alignz 16
global EXTN(jconst_idct_islow_sse2)
EXTN(jconst_idct_islow_sse2):
PW_F130_F054 times 4 dw (F_0_541+F_0_765), F_0_541
PW_F054_MF130 times 4 dw F_0_541, (F_0_541-F_1_847)
PW_MF078_F117 times 4 dw (F_1_175-F_1_961), F_1_175
PW_F117_F078 times 4 dw F_1_175, (F_1_175-F_0_390)
PW_MF060_MF089 times 4 dw (F_0_298-F_0_899),-F_0_899
PW_MF089_F060 times 4 dw -F_0_899, (F_1_501-F_0_899)
PW_MF050_MF256 times 4 dw (F_2_053-F_2_562),-F_2_562
PW_MF256_F050 times 4 dw -F_2_562, (F_3_072-F_2_562)
PD_DESCALE_P1 times 4 dd 1 << (DESCALE_P1-1)
PD_DESCALE_P2 times 4 dd 1 << (DESCALE_P2-1)
PB_CENTERJSAMP times 16 db CENTERJSAMPLE
alignz 16
; --------------------------------------------------------------------------
SECTION SEG_TEXT
BITS 32
;
; Perform dequantization and inverse DCT on one block of coefficients.
;
; GLOBAL(void)
; jsimd_idct_islow_sse2 (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_XMMWORD ; xmmword wk[WK_NUM]
%define WK_NUM 12
align 16
global EXTN(jsimd_idct_islow_sse2)
EXTN(jsimd_idct_islow_sse2):
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, [wk(0)]
pushpic ebx
; push ecx ; unused
; push edx ; need not be preserved
push esi
push edi
get_GOT ebx ; get GOT address
; ---- Pass 1: process columns from input.
; mov eax, [original_ebp]
mov edx, POINTER [dct_table(eax)] ; quantptr
mov esi, JCOEFPTR [coef_block(eax)] ; inptr
%ifndef NO_ZERO_COLUMN_TEST_ISLOW_SSE2
mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
jnz near .columnDCT
movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
por xmm1, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
por xmm1, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
por xmm0, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
por xmm1,xmm0
packsswb xmm1,xmm1
packsswb xmm1,xmm1
movd eax,xmm1
test eax,eax
jnz short .columnDCT
; -- AC terms all zero
movdqa xmm5, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
pmullw xmm5, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
psllw xmm5,PASS1_BITS
movdqa xmm4,xmm5 ; xmm5=in0=(00 01 02 03 04 05 06 07)
punpcklwd xmm5,xmm5 ; xmm5=(00 00 01 01 02 02 03 03)
punpckhwd xmm4,xmm4 ; xmm4=(04 04 05 05 06 06 07 07)
pshufd xmm7,xmm5,0x00 ; xmm7=col0=(00 00 00 00 00 00 00 00)
pshufd xmm6,xmm5,0x55 ; xmm6=col1=(01 01 01 01 01 01 01 01)
pshufd xmm1,xmm5,0xAA ; xmm1=col2=(02 02 02 02 02 02 02 02)
pshufd xmm5,xmm5,0xFF ; xmm5=col3=(03 03 03 03 03 03 03 03)
pshufd xmm0,xmm4,0x00 ; xmm0=col4=(04 04 04 04 04 04 04 04)
pshufd xmm3,xmm4,0x55 ; xmm3=col5=(05 05 05 05 05 05 05 05)
pshufd xmm2,xmm4,0xAA ; xmm2=col6=(06 06 06 06 06 06 06 06)
pshufd xmm4,xmm4,0xFF ; xmm4=col7=(07 07 07 07 07 07 07 07)
movdqa XMMWORD [wk(8)], xmm6 ; wk(8)=col1
movdqa XMMWORD [wk(9)], xmm5 ; wk(9)=col3
movdqa XMMWORD [wk(10)], xmm3 ; wk(10)=col5
movdqa XMMWORD [wk(11)], xmm4 ; wk(11)=col7
jmp near .column_end
alignx 16,7
%endif
.columnDCT:
; -- Even part
movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
movdqa xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
pmullw xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
; (Original)
; z1 = (z2 + z3) * 0.541196100;
; tmp2 = z1 + z3 * -1.847759065;
; tmp3 = z1 + z2 * 0.765366865;
;
; (This implementation)
; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065);
; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100;
movdqa xmm4,xmm1 ; xmm1=in2=z2
movdqa xmm5,xmm1
punpcklwd xmm4,xmm3 ; xmm3=in6=z3
punpckhwd xmm5,xmm3
movdqa xmm1,xmm4
movdqa xmm3,xmm5
pmaddwd xmm4,[GOTOFF(ebx,PW_F130_F054)] ; xmm4=tmp3L
pmaddwd xmm5,[GOTOFF(ebx,PW_F130_F054)] ; xmm5=tmp3H
pmaddwd xmm1,[GOTOFF(ebx,PW_F054_MF130)] ; xmm1=tmp2L
pmaddwd xmm3,[GOTOFF(ebx,PW_F054_MF130)] ; xmm3=tmp2H
movdqa xmm6,xmm0
paddw xmm0,xmm2 ; xmm0=in0+in4
psubw xmm6,xmm2 ; xmm6=in0-in4
pxor xmm7,xmm7
pxor xmm2,xmm2
punpcklwd xmm7,xmm0 ; xmm7=tmp0L
punpckhwd xmm2,xmm0 ; xmm2=tmp0H
psrad xmm7,(16-CONST_BITS) ; psrad xmm7,16 & pslld xmm7,CONST_BITS
psrad xmm2,(16-CONST_BITS) ; psrad xmm2,16 & pslld xmm2,CONST_BITS
movdqa xmm0,xmm7
paddd xmm7,xmm4 ; xmm7=tmp10L
psubd xmm0,xmm4 ; xmm0=tmp13L
movdqa xmm4,xmm2
paddd xmm2,xmm5 ; xmm2=tmp10H
psubd xmm4,xmm5 ; xmm4=tmp13H
movdqa XMMWORD [wk(0)], xmm7 ; wk(0)=tmp10L
movdqa XMMWORD [wk(1)], xmm2 ; wk(1)=tmp10H
movdqa XMMWORD [wk(2)], xmm0 ; wk(2)=tmp13L
movdqa XMMWORD [wk(3)], xmm4 ; wk(3)=tmp13H
pxor xmm5,xmm5
pxor xmm7,xmm7
punpcklwd xmm5,xmm6 ; xmm5=tmp1L
punpckhwd xmm7,xmm6 ; xmm7=tmp1H
psrad xmm5,(16-CONST_BITS) ; psrad xmm5,16 & pslld xmm5,CONST_BITS
psrad xmm7,(16-CONST_BITS) ; psrad xmm7,16 & pslld xmm7,CONST_BITS
movdqa xmm2,xmm5
paddd xmm5,xmm1 ; xmm5=tmp11L
psubd xmm2,xmm1 ; xmm2=tmp12L
movdqa xmm0,xmm7
paddd xmm7,xmm3 ; xmm7=tmp11H
psubd xmm0,xmm3 ; xmm0=tmp12H
movdqa XMMWORD [wk(4)], xmm5 ; wk(4)=tmp11L
movdqa XMMWORD [wk(5)], xmm7 ; wk(5)=tmp11H
movdqa XMMWORD [wk(6)], xmm2 ; wk(6)=tmp12L
movdqa XMMWORD [wk(7)], xmm0 ; wk(7)=tmp12H
; -- Odd part
movdqa xmm4, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
movdqa xmm6, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
pmullw xmm4, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm6, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm1, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
movdqa xmm3, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
pmullw xmm1, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
pmullw xmm3, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
movdqa xmm5,xmm6
movdqa xmm7,xmm4
paddw xmm5,xmm3 ; xmm5=z3
paddw xmm7,xmm1 ; xmm7=z4
; (Original)
; z5 = (z3 + z4) * 1.175875602;
; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
; z3 += z5; z4 += z5;
;
; (This implementation)
; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
movdqa xmm2,xmm5
movdqa xmm0,xmm5
punpcklwd xmm2,xmm7
punpckhwd xmm0,xmm7
movdqa xmm5,xmm2
movdqa xmm7,xmm0
pmaddwd xmm2,[GOTOFF(ebx,PW_MF078_F117)] ; xmm2=z3L
pmaddwd xmm0,[GOTOFF(ebx,PW_MF078_F117)] ; xmm0=z3H
pmaddwd xmm5,[GOTOFF(ebx,PW_F117_F078)] ; xmm5=z4L
pmaddwd xmm7,[GOTOFF(ebx,PW_F117_F078)] ; xmm7=z4H
movdqa XMMWORD [wk(10)], xmm2 ; wk(10)=z3L
movdqa XMMWORD [wk(11)], xmm0 ; wk(11)=z3H
; (Original)
; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2;
; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869;
; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110;
; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
; tmp0 += z1 + z3; tmp1 += z2 + z4;
; tmp2 += z2 + z3; tmp3 += z1 + z4;
;
; (This implementation)
; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223;
; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447;
; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447);
; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223);
; tmp0 += z3; tmp1 += z4;
; tmp2 += z3; tmp3 += z4;
movdqa xmm2,xmm3
movdqa xmm0,xmm3
punpcklwd xmm2,xmm4
punpckhwd xmm0,xmm4
movdqa xmm3,xmm2
movdqa xmm4,xmm0
pmaddwd xmm2,[GOTOFF(ebx,PW_MF060_MF089)] ; xmm2=tmp0L
pmaddwd xmm0,[GOTOFF(ebx,PW_MF060_MF089)] ; xmm0=tmp0H
pmaddwd xmm3,[GOTOFF(ebx,PW_MF089_F060)] ; xmm3=tmp3L
pmaddwd xmm4,[GOTOFF(ebx,PW_MF089_F060)] ; xmm4=tmp3H
paddd xmm2, XMMWORD [wk(10)] ; xmm2=tmp0L
paddd xmm0, XMMWORD [wk(11)] ; xmm0=tmp0H
paddd xmm3,xmm5 ; xmm3=tmp3L
paddd xmm4,xmm7 ; xmm4=tmp3H
movdqa XMMWORD [wk(8)], xmm2 ; wk(8)=tmp0L
movdqa XMMWORD [wk(9)], xmm0 ; wk(9)=tmp0H
movdqa xmm2,xmm1
movdqa xmm0,xmm1
punpcklwd xmm2,xmm6
punpckhwd xmm0,xmm6
movdqa xmm1,xmm2
movdqa xmm6,xmm0
pmaddwd xmm2,[GOTOFF(ebx,PW_MF050_MF256)] ; xmm2=tmp1L
pmaddwd xmm0,[GOTOFF(ebx,PW_MF050_MF256)] ; xmm0=tmp1H
pmaddwd xmm1,[GOTOFF(ebx,PW_MF256_F050)] ; xmm1=tmp2L
pmaddwd xmm6,[GOTOFF(ebx,PW_MF256_F050)] ; xmm6=tmp2H
paddd xmm2,xmm5 ; xmm2=tmp1L
paddd xmm0,xmm7 ; xmm0=tmp1H
paddd xmm1, XMMWORD [wk(10)] ; xmm1=tmp2L
paddd xmm6, XMMWORD [wk(11)] ; xmm6=tmp2H
movdqa XMMWORD [wk(10)], xmm2 ; wk(10)=tmp1L
movdqa XMMWORD [wk(11)], xmm0 ; wk(11)=tmp1H
; -- Final output stage
movdqa xmm5, XMMWORD [wk(0)] ; xmm5=tmp10L
movdqa xmm7, XMMWORD [wk(1)] ; xmm7=tmp10H
movdqa xmm2,xmm5
movdqa xmm0,xmm7
paddd xmm5,xmm3 ; xmm5=data0L
paddd xmm7,xmm4 ; xmm7=data0H
psubd xmm2,xmm3 ; xmm2=data7L
psubd xmm0,xmm4 ; xmm0=data7H
movdqa xmm3,[GOTOFF(ebx,PD_DESCALE_P1)] ; xmm3=[PD_DESCALE_P1]
paddd xmm5,xmm3
paddd xmm7,xmm3
psrad xmm5,DESCALE_P1
psrad xmm7,DESCALE_P1
paddd xmm2,xmm3
paddd xmm0,xmm3
psrad xmm2,DESCALE_P1
psrad xmm0,DESCALE_P1
packssdw xmm5,xmm7 ; xmm5=data0=(00 01 02 03 04 05 06 07)
packssdw xmm2,xmm0 ; xmm2=data7=(70 71 72 73 74 75 76 77)
movdqa xmm4, XMMWORD [wk(4)] ; xmm4=tmp11L
movdqa xmm3, XMMWORD [wk(5)] ; xmm3=tmp11H
movdqa xmm7,xmm4
movdqa xmm0,xmm3
paddd xmm4,xmm1 ; xmm4=data1L
paddd xmm3,xmm6 ; xmm3=data1H
psubd xmm7,xmm1 ; xmm7=data6L
psubd xmm0,xmm6 ; xmm0=data6H
movdqa xmm1,[GOTOFF(ebx,PD_DESCALE_P1)] ; xmm1=[PD_DESCALE_P1]
paddd xmm4,xmm1
paddd xmm3,xmm1
psrad xmm4,DESCALE_P1
psrad xmm3,DESCALE_P1
paddd xmm7,xmm1
paddd xmm0,xmm1
psrad xmm7,DESCALE_P1
psrad xmm0,DESCALE_P1
packssdw xmm4,xmm3 ; xmm4=data1=(10 11 12 13 14 15 16 17)
packssdw xmm7,xmm0 ; xmm7=data6=(60 61 62 63 64 65 66 67)
movdqa xmm6,xmm5 ; transpose coefficients(phase 1)
punpcklwd xmm5,xmm4 ; xmm5=(00 10 01 11 02 12 03 13)
punpckhwd xmm6,xmm4 ; xmm6=(04 14 05 15 06 16 07 17)
movdqa xmm1,xmm7 ; transpose coefficients(phase 1)
punpcklwd xmm7,xmm2 ; xmm7=(60 70 61 71 62 72 63 73)
punpckhwd xmm1,xmm2 ; xmm1=(64 74 65 75 66 76 67 77)
movdqa xmm3, XMMWORD [wk(6)] ; xmm3=tmp12L
movdqa xmm0, XMMWORD [wk(7)] ; xmm0=tmp12H
movdqa xmm4, XMMWORD [wk(10)] ; xmm4=tmp1L
movdqa xmm2, XMMWORD [wk(11)] ; xmm2=tmp1H
movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(00 10 01 11 02 12 03 13)
movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=(04 14 05 15 06 16 07 17)
movdqa XMMWORD [wk(4)], xmm7 ; wk(4)=(60 70 61 71 62 72 63 73)
movdqa XMMWORD [wk(5)], xmm1 ; wk(5)=(64 74 65 75 66 76 67 77)
movdqa xmm5,xmm3
movdqa xmm6,xmm0
paddd xmm3,xmm4 ; xmm3=data2L
paddd xmm0,xmm2 ; xmm0=data2H
psubd xmm5,xmm4 ; xmm5=data5L
psubd xmm6,xmm2 ; xmm6=data5H
movdqa xmm7,[GOTOFF(ebx,PD_DESCALE_P1)] ; xmm7=[PD_DESCALE_P1]
paddd xmm3,xmm7
paddd xmm0,xmm7
psrad xmm3,DESCALE_P1
psrad xmm0,DESCALE_P1
paddd xmm5,xmm7
paddd xmm6,xmm7
psrad xmm5,DESCALE_P1
psrad xmm6,DESCALE_P1
packssdw xmm3,xmm0 ; xmm3=data2=(20 21 22 23 24 25 26 27)
packssdw xmm5,xmm6 ; xmm5=data5=(50 51 52 53 54 55 56 57)
movdqa xmm1, XMMWORD [wk(2)] ; xmm1=tmp13L
movdqa xmm4, XMMWORD [wk(3)] ; xmm4=tmp13H
movdqa xmm2, XMMWORD [wk(8)] ; xmm2=tmp0L
movdqa xmm7, XMMWORD [wk(9)] ; xmm7=tmp0H
movdqa xmm0,xmm1
movdqa xmm6,xmm4
paddd xmm1,xmm2 ; xmm1=data3L
paddd xmm4,xmm7 ; xmm4=data3H
psubd xmm0,xmm2 ; xmm0=data4L
psubd xmm6,xmm7 ; xmm6=data4H
movdqa xmm2,[GOTOFF(ebx,PD_DESCALE_P1)] ; xmm2=[PD_DESCALE_P1]
paddd xmm1,xmm2
paddd xmm4,xmm2
psrad xmm1,DESCALE_P1
psrad xmm4,DESCALE_P1
paddd xmm0,xmm2
paddd xmm6,xmm2
psrad xmm0,DESCALE_P1
psrad xmm6,DESCALE_P1
packssdw xmm1,xmm4 ; xmm1=data3=(30 31 32 33 34 35 36 37)
packssdw xmm0,xmm6 ; xmm0=data4=(40 41 42 43 44 45 46 47)
movdqa xmm7, XMMWORD [wk(0)] ; xmm7=(00 10 01 11 02 12 03 13)
movdqa xmm2, XMMWORD [wk(1)] ; xmm2=(04 14 05 15 06 16 07 17)
movdqa xmm4,xmm3 ; transpose coefficients(phase 1)
punpcklwd xmm3,xmm1 ; xmm3=(20 30 21 31 22 32 23 33)
punpckhwd xmm4,xmm1 ; xmm4=(24 34 25 35 26 36 27 37)
movdqa xmm6,xmm0 ; transpose coefficients(phase 1)
punpcklwd xmm0,xmm5 ; xmm0=(40 50 41 51 42 52 43 53)
punpckhwd xmm6,xmm5 ; xmm6=(44 54 45 55 46 56 47 57)
movdqa xmm1,xmm7 ; transpose coefficients(phase 2)
punpckldq xmm7,xmm3 ; xmm7=(00 10 20 30 01 11 21 31)
punpckhdq xmm1,xmm3 ; xmm1=(02 12 22 32 03 13 23 33)
movdqa xmm5,xmm2 ; transpose coefficients(phase 2)
punpckldq xmm2,xmm4 ; xmm2=(04 14 24 34 05 15 25 35)
punpckhdq xmm5,xmm4 ; xmm5=(06 16 26 36 07 17 27 37)
movdqa xmm3, XMMWORD [wk(4)] ; xmm3=(60 70 61 71 62 72 63 73)
movdqa xmm4, XMMWORD [wk(5)] ; xmm4=(64 74 65 75 66 76 67 77)
movdqa XMMWORD [wk(6)], xmm2 ; wk(6)=(04 14 24 34 05 15 25 35)
movdqa XMMWORD [wk(7)], xmm5 ; wk(7)=(06 16 26 36 07 17 27 37)
movdqa xmm2,xmm0 ; transpose coefficients(phase 2)
punpckldq xmm0,xmm3 ; xmm0=(40 50 60 70 41 51 61 71)
punpckhdq xmm2,xmm3 ; xmm2=(42 52 62 72 43 53 63 73)
movdqa xmm5,xmm6 ; transpose coefficients(phase 2)
punpckldq xmm6,xmm4 ; xmm6=(44 54 64 74 45 55 65 75)
punpckhdq xmm5,xmm4 ; xmm5=(46 56 66 76 47 57 67 77)
movdqa xmm3,xmm7 ; transpose coefficients(phase 3)
punpcklqdq xmm7,xmm0 ; xmm7=col0=(00 10 20 30 40 50 60 70)
punpckhqdq xmm3,xmm0 ; xmm3=col1=(01 11 21 31 41 51 61 71)
movdqa xmm4,xmm1 ; transpose coefficients(phase 3)
punpcklqdq xmm1,xmm2 ; xmm1=col2=(02 12 22 32 42 52 62 72)
punpckhqdq xmm4,xmm2 ; xmm4=col3=(03 13 23 33 43 53 63 73)
movdqa xmm0, XMMWORD [wk(6)] ; xmm0=(04 14 24 34 05 15 25 35)
movdqa xmm2, XMMWORD [wk(7)] ; xmm2=(06 16 26 36 07 17 27 37)
movdqa XMMWORD [wk(8)], xmm3 ; wk(8)=col1
movdqa XMMWORD [wk(9)], xmm4 ; wk(9)=col3
movdqa xmm3,xmm0 ; transpose coefficients(phase 3)
punpcklqdq xmm0,xmm6 ; xmm0=col4=(04 14 24 34 44 54 64 74)
punpckhqdq xmm3,xmm6 ; xmm3=col5=(05 15 25 35 45 55 65 75)
movdqa xmm4,xmm2 ; transpose coefficients(phase 3)
punpcklqdq xmm2,xmm5 ; xmm2=col6=(06 16 26 36 46 56 66 76)
punpckhqdq xmm4,xmm5 ; xmm4=col7=(07 17 27 37 47 57 67 77)
movdqa XMMWORD [wk(10)], xmm3 ; wk(10)=col5
movdqa XMMWORD [wk(11)], xmm4 ; wk(11)=col7
.column_end:
; -- Prefetch the next coefficient block
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
; ---- Pass 2: process rows from work array, store into output array.
mov eax, [original_ebp]
mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
mov eax, JDIMENSION [output_col(eax)]
; -- Even part
; xmm7=col0, xmm1=col2, xmm0=col4, xmm2=col6
; (Original)
; z1 = (z2 + z3) * 0.541196100;
; tmp2 = z1 + z3 * -1.847759065;
; tmp3 = z1 + z2 * 0.765366865;
;
; (This implementation)
; tmp2 = z2 * 0.541196100 + z3 * (0.541196100 - 1.847759065);
; tmp3 = z2 * (0.541196100 + 0.765366865) + z3 * 0.541196100;
movdqa xmm6,xmm1 ; xmm1=in2=z2
movdqa xmm5,xmm1
punpcklwd xmm6,xmm2 ; xmm2=in6=z3
punpckhwd xmm5,xmm2
movdqa xmm1,xmm6
movdqa xmm2,xmm5
pmaddwd xmm6,[GOTOFF(ebx,PW_F130_F054)] ; xmm6=tmp3L
pmaddwd xmm5,[GOTOFF(ebx,PW_F130_F054)] ; xmm5=tmp3H
pmaddwd xmm1,[GOTOFF(ebx,PW_F054_MF130)] ; xmm1=tmp2L
pmaddwd xmm2,[GOTOFF(ebx,PW_F054_MF130)] ; xmm2=tmp2H
movdqa xmm3,xmm7
paddw xmm7,xmm0 ; xmm7=in0+in4
psubw xmm3,xmm0 ; xmm3=in0-in4
pxor xmm4,xmm4
pxor xmm0,xmm0
punpcklwd xmm4,xmm7 ; xmm4=tmp0L
punpckhwd xmm0,xmm7 ; xmm0=tmp0H
psrad xmm4,(16-CONST_BITS) ; psrad xmm4,16 & pslld xmm4,CONST_BITS
psrad xmm0,(16-CONST_BITS) ; psrad xmm0,16 & pslld xmm0,CONST_BITS
movdqa xmm7,xmm4
paddd xmm4,xmm6 ; xmm4=tmp10L
psubd xmm7,xmm6 ; xmm7=tmp13L
movdqa xmm6,xmm0
paddd xmm0,xmm5 ; xmm0=tmp10H
psubd xmm6,xmm5 ; xmm6=tmp13H
movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=tmp10L
movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=tmp10H
movdqa XMMWORD [wk(2)], xmm7 ; wk(2)=tmp13L
movdqa XMMWORD [wk(3)], xmm6 ; wk(3)=tmp13H
pxor xmm5,xmm5
pxor xmm4,xmm4
punpcklwd xmm5,xmm3 ; xmm5=tmp1L
punpckhwd xmm4,xmm3 ; xmm4=tmp1H
psrad xmm5,(16-CONST_BITS) ; psrad xmm5,16 & pslld xmm5,CONST_BITS
psrad xmm4,(16-CONST_BITS) ; psrad xmm4,16 & pslld xmm4,CONST_BITS
movdqa xmm0,xmm5
paddd xmm5,xmm1 ; xmm5=tmp11L
psubd xmm0,xmm1 ; xmm0=tmp12L
movdqa xmm7,xmm4
paddd xmm4,xmm2 ; xmm4=tmp11H
psubd xmm7,xmm2 ; xmm7=tmp12H
movdqa XMMWORD [wk(4)], xmm5 ; wk(4)=tmp11L
movdqa XMMWORD [wk(5)], xmm4 ; wk(5)=tmp11H
movdqa XMMWORD [wk(6)], xmm0 ; wk(6)=tmp12L
movdqa XMMWORD [wk(7)], xmm7 ; wk(7)=tmp12H
; -- Odd part
movdqa xmm6, XMMWORD [wk(9)] ; xmm6=col3
movdqa xmm3, XMMWORD [wk(8)] ; xmm3=col1
movdqa xmm1, XMMWORD [wk(11)] ; xmm1=col7
movdqa xmm2, XMMWORD [wk(10)] ; xmm2=col5
movdqa xmm5,xmm6
movdqa xmm4,xmm3
paddw xmm5,xmm1 ; xmm5=z3
paddw xmm4,xmm2 ; xmm4=z4
; (Original)
; z5 = (z3 + z4) * 1.175875602;
; z3 = z3 * -1.961570560; z4 = z4 * -0.390180644;
; z3 += z5; z4 += z5;
;
; (This implementation)
; z3 = z3 * (1.175875602 - 1.961570560) + z4 * 1.175875602;
; z4 = z3 * 1.175875602 + z4 * (1.175875602 - 0.390180644);
movdqa xmm0,xmm5
movdqa xmm7,xmm5
punpcklwd xmm0,xmm4
punpckhwd xmm7,xmm4
movdqa xmm5,xmm0
movdqa xmm4,xmm7
pmaddwd xmm0,[GOTOFF(ebx,PW_MF078_F117)] ; xmm0=z3L
pmaddwd xmm7,[GOTOFF(ebx,PW_MF078_F117)] ; xmm7=z3H
pmaddwd xmm5,[GOTOFF(ebx,PW_F117_F078)] ; xmm5=z4L
pmaddwd xmm4,[GOTOFF(ebx,PW_F117_F078)] ; xmm4=z4H
movdqa XMMWORD [wk(10)], xmm0 ; wk(10)=z3L
movdqa XMMWORD [wk(11)], xmm7 ; wk(11)=z3H
; (Original)
; z1 = tmp0 + tmp3; z2 = tmp1 + tmp2;
; tmp0 = tmp0 * 0.298631336; tmp1 = tmp1 * 2.053119869;
; tmp2 = tmp2 * 3.072711026; tmp3 = tmp3 * 1.501321110;
; z1 = z1 * -0.899976223; z2 = z2 * -2.562915447;
; tmp0 += z1 + z3; tmp1 += z2 + z4;
; tmp2 += z2 + z3; tmp3 += z1 + z4;
;
; (This implementation)
; tmp0 = tmp0 * (0.298631336 - 0.899976223) + tmp3 * -0.899976223;
; tmp1 = tmp1 * (2.053119869 - 2.562915447) + tmp2 * -2.562915447;
; tmp2 = tmp1 * -2.562915447 + tmp2 * (3.072711026 - 2.562915447);
; tmp3 = tmp0 * -0.899976223 + tmp3 * (1.501321110 - 0.899976223);
; tmp0 += z3; tmp1 += z4;
; tmp2 += z3; tmp3 += z4;
movdqa xmm0,xmm1
movdqa xmm7,xmm1
punpcklwd xmm0,xmm3
punpckhwd xmm7,xmm3
movdqa xmm1,xmm0
movdqa xmm3,xmm7
pmaddwd xmm0,[GOTOFF(ebx,PW_MF060_MF089)] ; xmm0=tmp0L
pmaddwd xmm7,[GOTOFF(ebx,PW_MF060_MF089)] ; xmm7=tmp0H
pmaddwd xmm1,[GOTOFF(ebx,PW_MF089_F060)] ; xmm1=tmp3L
pmaddwd xmm3,[GOTOFF(ebx,PW_MF089_F060)] ; xmm3=tmp3H
paddd xmm0, XMMWORD [wk(10)] ; xmm0=tmp0L
paddd xmm7, XMMWORD [wk(11)] ; xmm7=tmp0H
paddd xmm1,xmm5 ; xmm1=tmp3L
paddd xmm3,xmm4 ; xmm3=tmp3H
movdqa XMMWORD [wk(8)], xmm0 ; wk(8)=tmp0L
movdqa XMMWORD [wk(9)], xmm7 ; wk(9)=tmp0H
movdqa xmm0,xmm2
movdqa xmm7,xmm2
punpcklwd xmm0,xmm6
punpckhwd xmm7,xmm6
movdqa xmm2,xmm0
movdqa xmm6,xmm7
pmaddwd xmm0,[GOTOFF(ebx,PW_MF050_MF256)] ; xmm0=tmp1L
pmaddwd xmm7,[GOTOFF(ebx,PW_MF050_MF256)] ; xmm7=tmp1H
pmaddwd xmm2,[GOTOFF(ebx,PW_MF256_F050)] ; xmm2=tmp2L
pmaddwd xmm6,[GOTOFF(ebx,PW_MF256_F050)] ; xmm6=tmp2H
paddd xmm0,xmm5 ; xmm0=tmp1L
paddd xmm7,xmm4 ; xmm7=tmp1H
paddd xmm2, XMMWORD [wk(10)] ; xmm2=tmp2L
paddd xmm6, XMMWORD [wk(11)] ; xmm6=tmp2H
movdqa XMMWORD [wk(10)], xmm0 ; wk(10)=tmp1L
movdqa XMMWORD [wk(11)], xmm7 ; wk(11)=tmp1H
; -- Final output stage
movdqa xmm5, XMMWORD [wk(0)] ; xmm5=tmp10L
movdqa xmm4, XMMWORD [wk(1)] ; xmm4=tmp10H
movdqa xmm0,xmm5
movdqa xmm7,xmm4
paddd xmm5,xmm1 ; xmm5=data0L
paddd xmm4,xmm3 ; xmm4=data0H
psubd xmm0,xmm1 ; xmm0=data7L
psubd xmm7,xmm3 ; xmm7=data7H
movdqa xmm1,[GOTOFF(ebx,PD_DESCALE_P2)] ; xmm1=[PD_DESCALE_P2]
paddd xmm5,xmm1
paddd xmm4,xmm1
psrad xmm5,DESCALE_P2
psrad xmm4,DESCALE_P2
paddd xmm0,xmm1
paddd xmm7,xmm1
psrad xmm0,DESCALE_P2
psrad xmm7,DESCALE_P2
packssdw xmm5,xmm4 ; xmm5=data0=(00 10 20 30 40 50 60 70)
packssdw xmm0,xmm7 ; xmm0=data7=(07 17 27 37 47 57 67 77)
movdqa xmm3, XMMWORD [wk(4)] ; xmm3=tmp11L
movdqa xmm1, XMMWORD [wk(5)] ; xmm1=tmp11H
movdqa xmm4,xmm3
movdqa xmm7,xmm1
paddd xmm3,xmm2 ; xmm3=data1L
paddd xmm1,xmm6 ; xmm1=data1H
psubd xmm4,xmm2 ; xmm4=data6L
psubd xmm7,xmm6 ; xmm7=data6H
movdqa xmm2,[GOTOFF(ebx,PD_DESCALE_P2)] ; xmm2=[PD_DESCALE_P2]
paddd xmm3,xmm2
paddd xmm1,xmm2
psrad xmm3,DESCALE_P2
psrad xmm1,DESCALE_P2
paddd xmm4,xmm2
paddd xmm7,xmm2
psrad xmm4,DESCALE_P2
psrad xmm7,DESCALE_P2
packssdw xmm3,xmm1 ; xmm3=data1=(01 11 21 31 41 51 61 71)
packssdw xmm4,xmm7 ; xmm4=data6=(06 16 26 36 46 56 66 76)
packsswb xmm5,xmm4 ; xmm5=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
packsswb xmm3,xmm0 ; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
movdqa xmm6, XMMWORD [wk(6)] ; xmm6=tmp12L
movdqa xmm2, XMMWORD [wk(7)] ; xmm2=tmp12H
movdqa xmm1, XMMWORD [wk(10)] ; xmm1=tmp1L
movdqa xmm7, XMMWORD [wk(11)] ; xmm7=tmp1H
movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
movdqa XMMWORD [wk(1)], xmm3 ; wk(1)=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
movdqa xmm4,xmm6
movdqa xmm0,xmm2
paddd xmm6,xmm1 ; xmm6=data2L
paddd xmm2,xmm7 ; xmm2=data2H
psubd xmm4,xmm1 ; xmm4=data5L
psubd xmm0,xmm7 ; xmm0=data5H
movdqa xmm5,[GOTOFF(ebx,PD_DESCALE_P2)] ; xmm5=[PD_DESCALE_P2]
paddd xmm6,xmm5
paddd xmm2,xmm5
psrad xmm6,DESCALE_P2
psrad xmm2,DESCALE_P2
paddd xmm4,xmm5
paddd xmm0,xmm5
psrad xmm4,DESCALE_P2
psrad xmm0,DESCALE_P2
packssdw xmm6,xmm2 ; xmm6=data2=(02 12 22 32 42 52 62 72)
packssdw xmm4,xmm0 ; xmm4=data5=(05 15 25 35 45 55 65 75)
movdqa xmm3, XMMWORD [wk(2)] ; xmm3=tmp13L
movdqa xmm1, XMMWORD [wk(3)] ; xmm1=tmp13H
movdqa xmm7, XMMWORD [wk(8)] ; xmm7=tmp0L
movdqa xmm5, XMMWORD [wk(9)] ; xmm5=tmp0H
movdqa xmm2,xmm3
movdqa xmm0,xmm1
paddd xmm3,xmm7 ; xmm3=data3L
paddd xmm1,xmm5 ; xmm1=data3H
psubd xmm2,xmm7 ; xmm2=data4L
psubd xmm0,xmm5 ; xmm0=data4H
movdqa xmm7,[GOTOFF(ebx,PD_DESCALE_P2)] ; xmm7=[PD_DESCALE_P2]
paddd xmm3,xmm7
paddd xmm1,xmm7
psrad xmm3,DESCALE_P2
psrad xmm1,DESCALE_P2
paddd xmm2,xmm7
paddd xmm0,xmm7
psrad xmm2,DESCALE_P2
psrad xmm0,DESCALE_P2
movdqa xmm5,[GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm5=[PB_CENTERJSAMP]
packssdw xmm3,xmm1 ; xmm3=data3=(03 13 23 33 43 53 63 73)
packssdw xmm2,xmm0 ; xmm2=data4=(04 14 24 34 44 54 64 74)
movdqa xmm7, XMMWORD [wk(0)] ; xmm7=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
movdqa xmm1, XMMWORD [wk(1)] ; xmm1=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
packsswb xmm6,xmm2 ; xmm6=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74)
packsswb xmm3,xmm4 ; xmm3=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75)
paddb xmm7,xmm5
paddb xmm1,xmm5
paddb xmm6,xmm5
paddb xmm3,xmm5
movdqa xmm0,xmm7 ; transpose coefficients(phase 1)
punpcklbw xmm7,xmm1 ; xmm7=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71)
punpckhbw xmm0,xmm1 ; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77)
movdqa xmm2,xmm6 ; transpose coefficients(phase 1)
punpcklbw xmm6,xmm3 ; xmm6=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73)
punpckhbw xmm2,xmm3 ; xmm2=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75)
movdqa xmm4,xmm7 ; transpose coefficients(phase 2)
punpcklwd xmm7,xmm6 ; xmm7=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
punpckhwd xmm4,xmm6 ; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73)
movdqa xmm5,xmm2 ; transpose coefficients(phase 2)
punpcklwd xmm2,xmm0 ; xmm2=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
punpckhwd xmm5,xmm0 ; xmm5=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77)
movdqa xmm1,xmm7 ; transpose coefficients(phase 3)
punpckldq xmm7,xmm2 ; xmm7=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
punpckhdq xmm1,xmm2 ; xmm1=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
movdqa xmm3,xmm4 ; transpose coefficients(phase 3)
punpckldq xmm4,xmm5 ; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
punpckhdq xmm3,xmm5 ; xmm3=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
pshufd xmm6,xmm7,0x4E ; xmm6=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
pshufd xmm0,xmm1,0x4E ; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
pshufd xmm2,xmm4,0x4E ; xmm2=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
pshufd xmm5,xmm3,0x4E ; xmm5=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm7
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm1
mov edx, JSAMPROW [edi+4*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+6*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm0
mov edx, JSAMPROW [edi+5*SIZEOF_JSAMPROW]
mov esi, JSAMPROW [edi+7*SIZEOF_JSAMPROW]
movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm2
movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm5
pop edi
pop esi
; pop edx ; need not be preserved
; pop ecx ; unused
poppic 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