kc3-lang/libjpeg-turbo/simd/i386/jidctint-mmx.asm
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Hash : 5e27ca23
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Date : 2025-09-19T14:21:49
x86: Reformat NASM code to improve readability (and simplify the checkstyle script)
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simd/i386/jidctint-mmx.asm
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; ; Accurate integer IDCT (32-bit MMX) ; ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB ; Copyright (C) 2016, 2020, 2024-2025, 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) or Yasm. ; ; 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 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_mmx) EXTN(jconst_idct_islow_mmx): PW_F130_F054 times 2 dw (F_0_541 + F_0_765), F_0_541 PW_F054_MF130 times 2 dw F_0_541, (F_0_541 - F_1_847) PW_MF078_F117 times 2 dw (F_1_175 - F_1_961), F_1_175 PW_F117_F078 times 2 dw F_1_175, (F_1_175 - F_0_390) PW_MF060_MF089 times 2 dw (F_0_298 - F_0_899), -F_0_899 PW_MF089_F060 times 2 dw -F_0_899, (F_1_501 - F_0_899) PW_MF050_MF256 times 2 dw (F_2_053 - F_2_562), -F_2_562 PW_MF256_F050 times 2 dw -F_2_562, (F_3_072 - F_2_562) PD_DESCALE_P1 times 2 dd 1 << (DESCALE_P1 - 1) PD_DESCALE_P2 times 2 dd 1 << (DESCALE_P2 - 1) PB_CENTERJSAMP times 8 db CENTERJSAMPLE ALIGNZ 32 ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; Perform dequantization and inverse DCT on one block of coefficients. ; ; GLOBAL(void) ; jsimd_idct_islow_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 12 %define workspace wk(0) - DCTSIZE2 * SIZEOF_JCOEF ; JCOEF workspace[DCTSIZE2] align 32 GLOBAL_FUNCTION(jsimd_idct_islow_mmx) EXTN(jsimd_idct_islow_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_ISLOW_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_ISLOW_MULT_TYPE)] psllw mm0, PASS1_BITS 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_ISLOW_MULT_TYPE)] pmullw mm1, MMWORD [MMBLOCK(2, 0, edx, SIZEOF_ISLOW_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_ISLOW_MULT_TYPE)] pmullw mm3, MMWORD [MMBLOCK(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; movq mm4, mm1 ; mm1 = in2 = z2 movq mm5, mm1 punpcklwd mm4, mm3 ; mm3 = in6 = z3 punpckhwd mm5, mm3 movq mm1, mm4 movq mm3, mm5 pmaddwd mm4, [GOTOFF(ebx, PW_F130_F054)] ; mm4 = tmp3L pmaddwd mm5, [GOTOFF(ebx, PW_F130_F054)] ; mm5 = tmp3H pmaddwd mm1, [GOTOFF(ebx, PW_F054_MF130)] ; mm1 = tmp2L pmaddwd mm3, [GOTOFF(ebx, PW_F054_MF130)] ; mm3 = tmp2H movq mm6, mm0 paddw mm0, mm2 ; mm0 = in0 + in4 psubw mm6, mm2 ; mm6 = in0 - in4 pxor mm7, mm7 pxor mm2, mm2 punpcklwd mm7, mm0 ; mm7 = tmp0L punpckhwd mm2, mm0 ; mm2 = tmp0H psrad mm7, (16 - CONST_BITS) ; psrad mm7, 16 & pslld mm7, CONST_BITS psrad mm2, (16 - CONST_BITS) ; psrad mm2, 16 & pslld mm2, CONST_BITS movq mm0, mm7 paddd mm7, mm4 ; mm7 = tmp10L psubd mm0, mm4 ; mm0 = tmp13L movq mm4, mm2 paddd mm2, mm5 ; mm2 = tmp10H psubd mm4, mm5 ; mm4 = tmp13H movq MMWORD [wk(0)], mm7 ; wk(0) = tmp10L movq MMWORD [wk(1)], mm2 ; wk(1) = tmp10H movq MMWORD [wk(2)], mm0 ; wk(2) = tmp13L movq MMWORD [wk(3)], mm4 ; wk(3) = tmp13H pxor mm5, mm5 pxor mm7, mm7 punpcklwd mm5, mm6 ; mm5 = tmp1L punpckhwd mm7, mm6 ; mm7 = tmp1H psrad mm5, (16 - CONST_BITS) ; psrad mm5, 16 & pslld mm5, CONST_BITS psrad mm7, (16 - CONST_BITS) ; psrad mm7, 16 & pslld mm7, CONST_BITS movq mm2, mm5 paddd mm5, mm1 ; mm5 = tmp11L psubd mm2, mm1 ; mm2 = tmp12L movq mm0, mm7 paddd mm7, mm3 ; mm7 = tmp11H psubd mm0, mm3 ; mm0 = tmp12H movq MMWORD [wk(4)], mm5 ; wk(4) = tmp11L movq MMWORD [wk(5)], mm7 ; wk(5) = tmp11H movq MMWORD [wk(6)], mm2 ; wk(6) = tmp12L movq MMWORD [wk(7)], mm0 ; wk(7) = tmp12H ; -- Odd part movq mm4, MMWORD [MMBLOCK(1, 0, esi, SIZEOF_JCOEF)] movq mm6, MMWORD [MMBLOCK(3, 0, esi, SIZEOF_JCOEF)] pmullw mm4, MMWORD [MMBLOCK(1, 0, edx, SIZEOF_ISLOW_MULT_TYPE)] pmullw mm6, MMWORD [MMBLOCK(3, 0, edx, SIZEOF_ISLOW_MULT_TYPE)] movq mm1, MMWORD [MMBLOCK(5, 0, esi, SIZEOF_JCOEF)] movq mm3, MMWORD [MMBLOCK(7, 0, esi, SIZEOF_JCOEF)] pmullw mm1, MMWORD [MMBLOCK(5, 0, edx, SIZEOF_ISLOW_MULT_TYPE)] pmullw mm3, MMWORD [MMBLOCK(7, 0, edx, SIZEOF_ISLOW_MULT_TYPE)] movq mm5, mm6 movq mm7, mm4 paddw mm5, mm3 ; mm5 = z3 paddw mm7, mm1 ; mm7 = 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); movq mm2, mm5 movq mm0, mm5 punpcklwd mm2, mm7 punpckhwd mm0, mm7 movq mm5, mm2 movq mm7, mm0 pmaddwd mm2, [GOTOFF(ebx, PW_MF078_F117)] ; mm2 = z3L pmaddwd mm0, [GOTOFF(ebx, PW_MF078_F117)] ; mm0 = z3H pmaddwd mm5, [GOTOFF(ebx, PW_F117_F078)] ; mm5 = z4L pmaddwd mm7, [GOTOFF(ebx, PW_F117_F078)] ; mm7 = z4H movq MMWORD [wk(10)], mm2 ; wk(10) = z3L movq MMWORD [wk(11)], mm0 ; 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; movq mm2, mm3 movq mm0, mm3 punpcklwd mm2, mm4 punpckhwd mm0, mm4 movq mm3, mm2 movq mm4, mm0 pmaddwd mm2, [GOTOFF(ebx, PW_MF060_MF089)] ; mm2 = tmp0L pmaddwd mm0, [GOTOFF(ebx, PW_MF060_MF089)] ; mm0 = tmp0H pmaddwd mm3, [GOTOFF(ebx, PW_MF089_F060)] ; mm3 = tmp3L pmaddwd mm4, [GOTOFF(ebx, PW_MF089_F060)] ; mm4 = tmp3H paddd mm2, MMWORD [wk(10)] ; mm2 = tmp0L paddd mm0, MMWORD [wk(11)] ; mm0 = tmp0H paddd mm3, mm5 ; mm3 = tmp3L paddd mm4, mm7 ; mm4 = tmp3H movq MMWORD [wk(8)], mm2 ; wk(8) = tmp0L movq MMWORD [wk(9)], mm0 ; wk(9) = tmp0H movq mm2, mm1 movq mm0, mm1 punpcklwd mm2, mm6 punpckhwd mm0, mm6 movq mm1, mm2 movq mm6, mm0 pmaddwd mm2, [GOTOFF(ebx, PW_MF050_MF256)] ; mm2 = tmp1L pmaddwd mm0, [GOTOFF(ebx, PW_MF050_MF256)] ; mm0 = tmp1H pmaddwd mm1, [GOTOFF(ebx, PW_MF256_F050)] ; mm1 = tmp2L pmaddwd mm6, [GOTOFF(ebx, PW_MF256_F050)] ; mm6 = tmp2H paddd mm2, mm5 ; mm2 = tmp1L paddd mm0, mm7 ; mm0 = tmp1H paddd mm1, MMWORD [wk(10)] ; mm1 = tmp2L paddd mm6, MMWORD [wk(11)] ; mm6 = tmp2H movq MMWORD [wk(10)], mm2 ; wk(10) = tmp1L movq MMWORD [wk(11)], mm0 ; wk(11) = tmp1H ; -- Final output stage movq mm5, MMWORD [wk(0)] ; mm5 = tmp10L movq mm7, MMWORD [wk(1)] ; mm7 = tmp10H movq mm2, mm5 movq mm0, mm7 paddd mm5, mm3 ; mm5 = data0L paddd mm7, mm4 ; mm7 = data0H psubd mm2, mm3 ; mm2 = data7L psubd mm0, mm4 ; mm0 = data7H movq mm3, [GOTOFF(ebx, PD_DESCALE_P1)] ; mm3 = [PD_DESCALE_P1] paddd mm5, mm3 paddd mm7, mm3 psrad mm5, DESCALE_P1 psrad mm7, DESCALE_P1 paddd mm2, mm3 paddd mm0, mm3 psrad mm2, DESCALE_P1 psrad mm0, DESCALE_P1 packssdw mm5, mm7 ; mm5 = data0 = (00 01 02 03) packssdw mm2, mm0 ; mm2 = data7 = (70 71 72 73) movq mm4, MMWORD [wk(4)] ; mm4 = tmp11L movq mm3, MMWORD [wk(5)] ; mm3 = tmp11H movq mm7, mm4 movq mm0, mm3 paddd mm4, mm1 ; mm4 = data1L paddd mm3, mm6 ; mm3 = data1H psubd mm7, mm1 ; mm7 = data6L psubd mm0, mm6 ; mm0 = data6H movq mm1, [GOTOFF(ebx, PD_DESCALE_P1)] ; mm1 = [PD_DESCALE_P1] paddd mm4, mm1 paddd mm3, mm1 psrad mm4, DESCALE_P1 psrad mm3, DESCALE_P1 paddd mm7, mm1 paddd mm0, mm1 psrad mm7, DESCALE_P1 psrad mm0, DESCALE_P1 packssdw mm4, mm3 ; mm4 = data1 = (10 11 12 13) packssdw mm7, mm0 ; mm7 = data6 = (60 61 62 63) movq mm6, mm5 ; transpose coefficients(phase 1) punpcklwd mm5, mm4 ; mm5 = (00 10 01 11) punpckhwd mm6, mm4 ; mm6 = (02 12 03 13) movq mm1, mm7 ; transpose coefficients(phase 1) punpcklwd mm7, mm2 ; mm7 = (60 70 61 71) punpckhwd mm1, mm2 ; mm1 = (62 72 63 73) movq mm3, MMWORD [wk(6)] ; mm3 = tmp12L movq mm0, MMWORD [wk(7)] ; mm0 = tmp12H movq mm4, MMWORD [wk(10)] ; mm4 = tmp1L movq mm2, MMWORD [wk(11)] ; mm2 = tmp1H movq MMWORD [wk(0)], mm5 ; wk(0) = (00 10 01 11) movq MMWORD [wk(1)], mm6 ; wk(1) = (02 12 03 13) movq MMWORD [wk(4)], mm7 ; wk(4) = (60 70 61 71) movq MMWORD [wk(5)], mm1 ; wk(5) = (62 72 63 73) movq mm5, mm3 movq mm6, mm0 paddd mm3, mm4 ; mm3 = data2L paddd mm0, mm2 ; mm0 = data2H psubd mm5, mm4 ; mm5 = data5L psubd mm6, mm2 ; mm6 = data5H movq mm7, [GOTOFF(ebx, PD_DESCALE_P1)] ; mm7 = [PD_DESCALE_P1] paddd mm3, mm7 paddd mm0, mm7 psrad mm3, DESCALE_P1 psrad mm0, DESCALE_P1 paddd mm5, mm7 paddd mm6, mm7 psrad mm5, DESCALE_P1 psrad mm6, DESCALE_P1 packssdw mm3, mm0 ; mm3 = data2 = (20 21 22 23) packssdw mm5, mm6 ; mm5 = data5 = (50 51 52 53) movq mm1, MMWORD [wk(2)] ; mm1 = tmp13L movq mm4, MMWORD [wk(3)] ; mm4 = tmp13H movq mm2, MMWORD [wk(8)] ; mm2 = tmp0L movq mm7, MMWORD [wk(9)] ; mm7 = tmp0H movq mm0, mm1 movq mm6, mm4 paddd mm1, mm2 ; mm1 = data3L paddd mm4, mm7 ; mm4 = data3H psubd mm0, mm2 ; mm0 = data4L psubd mm6, mm7 ; mm6 = data4H movq mm2, [GOTOFF(ebx, PD_DESCALE_P1)] ; mm2 = [PD_DESCALE_P1] paddd mm1, mm2 paddd mm4, mm2 psrad mm1, DESCALE_P1 psrad mm4, DESCALE_P1 paddd mm0, mm2 paddd mm6, mm2 psrad mm0, DESCALE_P1 psrad mm6, DESCALE_P1 packssdw mm1, mm4 ; mm1 = data3 = (30 31 32 33) packssdw mm0, mm6 ; mm0 = data4 = (40 41 42 43) movq mm7, MMWORD [wk(0)] ; mm7 = (00 10 01 11) movq mm2, MMWORD [wk(1)] ; mm2 = (02 12 03 13) movq mm4, mm3 ; transpose coefficients(phase 1) punpcklwd mm3, mm1 ; mm3 = (20 30 21 31) punpckhwd mm4, mm1 ; mm4 = (22 32 23 33) movq mm6, mm0 ; transpose coefficients(phase 1) punpcklwd mm0, mm5 ; mm0 = (40 50 41 51) punpckhwd mm6, mm5 ; mm6 = (42 52 43 53) movq mm1, mm7 ; transpose coefficients(phase 2) punpckldq mm7, mm3 ; mm7 = (00 10 20 30) punpckhdq mm1, mm3 ; mm1 = (01 11 21 31) movq mm5, mm2 ; transpose coefficients(phase 2) punpckldq mm2, mm4 ; mm2 = (02 12 22 32) punpckhdq mm5, mm4 ; mm5 = (03 13 23 33) movq mm3, MMWORD [wk(4)] ; mm3 = (60 70 61 71) movq mm4, MMWORD [wk(5)] ; mm4 = (62 72 63 73) movq MMWORD [MMBLOCK(0, 0, edi, SIZEOF_JCOEF)], mm7 movq MMWORD [MMBLOCK(1, 0, edi, SIZEOF_JCOEF)], mm1 movq MMWORD [MMBLOCK(2, 0, edi, SIZEOF_JCOEF)], mm2 movq MMWORD [MMBLOCK(3, 0, edi, SIZEOF_JCOEF)], mm5 movq mm7, mm0 ; transpose coefficients(phase 2) punpckldq mm0, mm3 ; mm0 = (40 50 60 70) punpckhdq mm7, mm3 ; mm7 = (41 51 61 71) movq mm1, mm6 ; transpose coefficients(phase 2) punpckldq mm6, mm4 ; mm6 = (42 52 62 72) punpckhdq mm1, mm4 ; mm1 = (43 53 63 73) movq MMWORD [MMBLOCK(0, 1, edi, SIZEOF_JCOEF)], mm0 movq MMWORD [MMBLOCK(1, 1, edi, SIZEOF_JCOEF)], mm7 movq MMWORD [MMBLOCK(2, 1, edi, SIZEOF_JCOEF)], mm6 movq MMWORD [MMBLOCK(3, 1, edi, SIZEOF_JCOEF)], mm1 .nextcolumn: add esi, byte 4 * SIZEOF_JCOEF ; coef_block add edx, byte 4 * SIZEOF_ISLOW_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)] ; (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; movq mm4, mm1 ; mm1 = in2 = z2 movq mm5, mm1 punpcklwd mm4, mm3 ; mm3 = in6 = z3 punpckhwd mm5, mm3 movq mm1, mm4 movq mm3, mm5 pmaddwd mm4, [GOTOFF(ebx, PW_F130_F054)] ; mm4 = tmp3L pmaddwd mm5, [GOTOFF(ebx, PW_F130_F054)] ; mm5 = tmp3H pmaddwd mm1, [GOTOFF(ebx, PW_F054_MF130)] ; mm1 = tmp2L pmaddwd mm3, [GOTOFF(ebx, PW_F054_MF130)] ; mm3 = tmp2H movq mm6, mm0 paddw mm0, mm2 ; mm0 = in0 + in4 psubw mm6, mm2 ; mm6 = in0 - in4 pxor mm7, mm7 pxor mm2, mm2 punpcklwd mm7, mm0 ; mm7 = tmp0L punpckhwd mm2, mm0 ; mm2 = tmp0H psrad mm7, (16 - CONST_BITS) ; psrad mm7, 16 & pslld mm7, CONST_BITS psrad mm2, (16 - CONST_BITS) ; psrad mm2, 16 & pslld mm2, CONST_BITS movq mm0, mm7 paddd mm7, mm4 ; mm7 = tmp10L psubd mm0, mm4 ; mm0 = tmp13L movq mm4, mm2 paddd mm2, mm5 ; mm2 = tmp10H psubd mm4, mm5 ; mm4 = tmp13H movq MMWORD [wk(0)], mm7 ; wk(0) = tmp10L movq MMWORD [wk(1)], mm2 ; wk(1) = tmp10H movq MMWORD [wk(2)], mm0 ; wk(2) = tmp13L movq MMWORD [wk(3)], mm4 ; wk(3) = tmp13H pxor mm5, mm5 pxor mm7, mm7 punpcklwd mm5, mm6 ; mm5 = tmp1L punpckhwd mm7, mm6 ; mm7 = tmp1H psrad mm5, (16 - CONST_BITS) ; psrad mm5, 16 & pslld mm5, CONST_BITS psrad mm7, (16 - CONST_BITS) ; psrad mm7, 16 & pslld mm7, CONST_BITS movq mm2, mm5 paddd mm5, mm1 ; mm5 = tmp11L psubd mm2, mm1 ; mm2 = tmp12L movq mm0, mm7 paddd mm7, mm3 ; mm7 = tmp11H psubd mm0, mm3 ; mm0 = tmp12H movq MMWORD [wk(4)], mm5 ; wk(4) = tmp11L movq MMWORD [wk(5)], mm7 ; wk(5) = tmp11H movq MMWORD [wk(6)], mm2 ; wk(6) = tmp12L movq MMWORD [wk(7)], mm0 ; wk(7) = tmp12H ; -- Odd part movq mm4, MMWORD [MMBLOCK(1, 0, esi, SIZEOF_JCOEF)] movq mm6, MMWORD [MMBLOCK(3, 0, esi, SIZEOF_JCOEF)] movq mm1, MMWORD [MMBLOCK(5, 0, esi, SIZEOF_JCOEF)] movq mm3, MMWORD [MMBLOCK(7, 0, esi, SIZEOF_JCOEF)] movq mm5, mm6 movq mm7, mm4 paddw mm5, mm3 ; mm5 = z3 paddw mm7, mm1 ; mm7 = 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); movq mm2, mm5 movq mm0, mm5 punpcklwd mm2, mm7 punpckhwd mm0, mm7 movq mm5, mm2 movq mm7, mm0 pmaddwd mm2, [GOTOFF(ebx, PW_MF078_F117)] ; mm2 = z3L pmaddwd mm0, [GOTOFF(ebx, PW_MF078_F117)] ; mm0 = z3H pmaddwd mm5, [GOTOFF(ebx, PW_F117_F078)] ; mm5 = z4L pmaddwd mm7, [GOTOFF(ebx, PW_F117_F078)] ; mm7 = z4H movq MMWORD [wk(10)], mm2 ; wk(10) = z3L movq MMWORD [wk(11)], mm0 ; 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; movq mm2, mm3 movq mm0, mm3 punpcklwd mm2, mm4 punpckhwd mm0, mm4 movq mm3, mm2 movq mm4, mm0 pmaddwd mm2, [GOTOFF(ebx, PW_MF060_MF089)] ; mm2 = tmp0L pmaddwd mm0, [GOTOFF(ebx, PW_MF060_MF089)] ; mm0 = tmp0H pmaddwd mm3, [GOTOFF(ebx, PW_MF089_F060)] ; mm3 = tmp3L pmaddwd mm4, [GOTOFF(ebx, PW_MF089_F060)] ; mm4 = tmp3H paddd mm2, MMWORD [wk(10)] ; mm2 = tmp0L paddd mm0, MMWORD [wk(11)] ; mm0 = tmp0H paddd mm3, mm5 ; mm3 = tmp3L paddd mm4, mm7 ; mm4 = tmp3H movq MMWORD [wk(8)], mm2 ; wk(8) = tmp0L movq MMWORD [wk(9)], mm0 ; wk(9) = tmp0H movq mm2, mm1 movq mm0, mm1 punpcklwd mm2, mm6 punpckhwd mm0, mm6 movq mm1, mm2 movq mm6, mm0 pmaddwd mm2, [GOTOFF(ebx, PW_MF050_MF256)] ; mm2 = tmp1L pmaddwd mm0, [GOTOFF(ebx, PW_MF050_MF256)] ; mm0 = tmp1H pmaddwd mm1, [GOTOFF(ebx, PW_MF256_F050)] ; mm1 = tmp2L pmaddwd mm6, [GOTOFF(ebx, PW_MF256_F050)] ; mm6 = tmp2H paddd mm2, mm5 ; mm2 = tmp1L paddd mm0, mm7 ; mm0 = tmp1H paddd mm1, MMWORD [wk(10)] ; mm1 = tmp2L paddd mm6, MMWORD [wk(11)] ; mm6 = tmp2H movq MMWORD [wk(10)], mm2 ; wk(10) = tmp1L movq MMWORD [wk(11)], mm0 ; wk(11) = tmp1H ; -- Final output stage movq mm5, MMWORD [wk(0)] ; mm5 = tmp10L movq mm7, MMWORD [wk(1)] ; mm7 = tmp10H movq mm2, mm5 movq mm0, mm7 paddd mm5, mm3 ; mm5 = data0L paddd mm7, mm4 ; mm7 = data0H psubd mm2, mm3 ; mm2 = data7L psubd mm0, mm4 ; mm0 = data7H movq mm3, [GOTOFF(ebx, PD_DESCALE_P2)] ; mm3 = [PD_DESCALE_P2] paddd mm5, mm3 paddd mm7, mm3 psrad mm5, DESCALE_P2 psrad mm7, DESCALE_P2 paddd mm2, mm3 paddd mm0, mm3 psrad mm2, DESCALE_P2 psrad mm0, DESCALE_P2 packssdw mm5, mm7 ; mm5 = data0 = (00 10 20 30) packssdw mm2, mm0 ; mm2 = data7 = (07 17 27 37) movq mm4, MMWORD [wk(4)] ; mm4 = tmp11L movq mm3, MMWORD [wk(5)] ; mm3 = tmp11H movq mm7, mm4 movq mm0, mm3 paddd mm4, mm1 ; mm4 = data1L paddd mm3, mm6 ; mm3 = data1H psubd mm7, mm1 ; mm7 = data6L psubd mm0, mm6 ; mm0 = data6H movq mm1, [GOTOFF(ebx, PD_DESCALE_P2)] ; mm1 = [PD_DESCALE_P2] paddd mm4, mm1 paddd mm3, mm1 psrad mm4, DESCALE_P2 psrad mm3, DESCALE_P2 paddd mm7, mm1 paddd mm0, mm1 psrad mm7, DESCALE_P2 psrad mm0, DESCALE_P2 packssdw mm4, mm3 ; mm4 = data1 = (01 11 21 31) packssdw mm7, mm0 ; mm7 = data6 = (06 16 26 36) packsswb mm5, mm7 ; mm5 = (00 10 20 30 06 16 26 36) packsswb mm4, mm2 ; mm4 = (01 11 21 31 07 17 27 37) movq mm6, MMWORD [wk(6)] ; mm6 = tmp12L movq mm1, MMWORD [wk(7)] ; mm1 = tmp12H movq mm3, MMWORD [wk(10)] ; mm3 = tmp1L movq mm0, MMWORD [wk(11)] ; mm0 = tmp1H movq MMWORD [wk(0)], mm5 ; wk(0) = (00 10 20 30 06 16 26 36) movq MMWORD [wk(1)], mm4 ; wk(1) = (01 11 21 31 07 17 27 37) movq mm7, mm6 movq mm2, mm1 paddd mm6, mm3 ; mm6 = data2L paddd mm1, mm0 ; mm1 = data2H psubd mm7, mm3 ; mm7 = data5L psubd mm2, mm0 ; mm2 = data5H movq mm5, [GOTOFF(ebx, PD_DESCALE_P2)] ; mm5 = [PD_DESCALE_P2] paddd mm6, mm5 paddd mm1, mm5 psrad mm6, DESCALE_P2 psrad mm1, DESCALE_P2 paddd mm7, mm5 paddd mm2, mm5 psrad mm7, DESCALE_P2 psrad mm2, DESCALE_P2 packssdw mm6, mm1 ; mm6 = data2 = (02 12 22 32) packssdw mm7, mm2 ; mm7 = data5 = (05 15 25 35) movq mm4, MMWORD [wk(2)] ; mm4 = tmp13L movq mm3, MMWORD [wk(3)] ; mm3 = tmp13H movq mm0, MMWORD [wk(8)] ; mm0 = tmp0L movq mm5, MMWORD [wk(9)] ; mm5 = tmp0H movq mm1, mm4 movq mm2, mm3 paddd mm4, mm0 ; mm4 = data3L paddd mm3, mm5 ; mm3 = data3H psubd mm1, mm0 ; mm1 = data4L psubd mm2, mm5 ; mm2 = data4H movq mm0, [GOTOFF(ebx, PD_DESCALE_P2)] ; mm0 = [PD_DESCALE_P2] paddd mm4, mm0 paddd mm3, mm0 psrad mm4, DESCALE_P2 psrad mm3, DESCALE_P2 paddd mm1, mm0 paddd mm2, mm0 psrad mm1, DESCALE_P2 psrad mm2, DESCALE_P2 movq mm5, [GOTOFF(ebx, PB_CENTERJSAMP)] ; mm5 = [PB_CENTERJSAMP] packssdw mm4, mm3 ; mm4 = data3 = (03 13 23 33) packssdw mm1, mm2 ; mm1 = data4 = (04 14 24 34) movq mm0, MMWORD [wk(0)] ; mm0 = (00 10 20 30 06 16 26 36) movq mm3, MMWORD [wk(1)] ; mm3 = (01 11 21 31 07 17 27 37) packsswb mm6, mm1 ; mm6 = (02 12 22 32 04 14 24 34) packsswb mm4, mm7 ; mm4 = (03 13 23 33 05 15 25 35) paddb mm0, mm5 paddb mm3, mm5 paddb mm6, mm5 paddb mm4, mm5 movq mm2, mm0 ; transpose coefficients(phase 1) punpcklbw mm0, mm3 ; mm0 = (00 01 10 11 20 21 30 31) punpckhbw mm2, mm3 ; mm2 = (06 07 16 17 26 27 36 37) movq mm1, mm6 ; transpose coefficients(phase 1) punpcklbw mm6, mm4 ; mm6 = (02 03 12 13 22 23 32 33) punpckhbw mm1, mm4 ; mm1 = (04 05 14 15 24 25 34 35) movq mm7, mm0 ; transpose coefficients(phase 2) punpcklwd mm0, mm6 ; mm0 = (00 01 02 03 10 11 12 13) punpckhwd mm7, mm6 ; mm7 = (20 21 22 23 30 31 32 33) movq mm5, mm1 ; transpose coefficients(phase 2) punpcklwd mm1, mm2 ; mm1 = (04 05 06 07 14 15 16 17) punpckhwd mm5, mm2 ; mm5 = (24 25 26 27 34 35 36 37) movq mm3, mm0 ; transpose coefficients(phase 3) punpckldq mm0, mm1 ; mm0 = (00 01 02 03 04 05 06 07) punpckhdq mm3, mm1 ; mm3 = (10 11 12 13 14 15 16 17) movq mm4, mm7 ; transpose coefficients(phase 3) punpckldq mm7, mm5 ; mm7 = (20 21 22 23 24 25 26 27) punpckhdq mm4, mm5 ; 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], mm3 mov edx, JSAMPROW [edi + 2 * SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi + 3 * SIZEOF_JSAMPROW] movq MMWORD [edx + eax * SIZEOF_JSAMPLE], mm7 movq MMWORD [ebx + eax * SIZEOF_JSAMPLE], mm4 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 ; For some reason, the OS X linker does not honor the request to align the ; segment unless we do this. align 32