; ; jidctint.asm - accurate integer IDCT (SSE2) ; ; Copyright 2009 Pierre Ossman for Cendio AB ; Copyright (C) 2016, 2020, 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 ; ; This file contains a slower but more 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. %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 32 GLOBAL_DATA(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 32 ; -------------------------------------------------------------------------- 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 32 GLOBAL_FUNCTION(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 32