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kc3-lang/libjpeg-turbo/simd/i386/jidctflt-sse2.asm
DRC
- simd/i386/jidctflt-sse2.asm
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; ; Floating-point IDCT (32-bit SSE & SSE2) ; ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB ; Copyright (C) 2016, 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 floating-point implementation of the inverse DCT ; (Discrete Cosine Transform). The following code is based directly on the ; IJG's original jidctflt.c; see jidctflt.c for more details. %include "jsimdext.inc" %include "jdct.inc" ; -------------------------------------------------------------------------- %macro UNPCKLPS2 2 ; %1 = (0 1 2 3) / %2 = (4 5 6 7) => %1 = (0 1 4 5) shufps %1, %2, 0x44 %endmacro %macro UNPCKHPS2 2 ; %1 = (0 1 2 3) / %2 = (4 5 6 7) => %1 = (2 3 6 7) shufps %1, %2, 0xEE %endmacro ; -------------------------------------------------------------------------- SECTION SEG_CONST ALIGNZ 32 GLOBAL_DATA(jconst_idct_float_sse2) EXTN(jconst_idct_float_sse2): PD_1_414 times 4 dd 1.414213562373095048801689 PD_1_847 times 4 dd 1.847759065022573512256366 PD_1_082 times 4 dd 1.082392200292393968799446 PD_M2_613 times 4 dd -2.613125929752753055713286 PD_RNDINT_MAGIC times 4 dd 100663296.0 ; (float)(0x00C00000 << 3) 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_float_sse2(void *dct_table, JCOEFPTR coef_block, ; JSAMPARRAY output_buf, JDIMENSION output_col) %define dct_table(b) (b) + 8 ; void *dct_table %define coef_block(b) (b) + 12 ; JCOEFPTR coef_block %define output_buf(b) (b) + 16 ; JSAMPARRAY output_buf %define output_col(b) (b) + 20 ; JDIMENSION output_col %define original_ebp ebp + 0 %define wk(i) ebp - (WK_NUM - (i)) * SIZEOF_XMMWORD ; xmmword wk[WK_NUM] %define WK_NUM 2 %define workspace wk(0) - DCTSIZE2 * SIZEOF_FAST_FLOAT ; FAST_FLOAT workspace[DCTSIZE2] align 32 GLOBAL_FUNCTION(jsimd_idct_float_sse2) EXTN(jsimd_idct_float_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, [workspace] push ebx ; push ecx ; need not be preserved ; push edx ; need not be preserved push esi push edi GET_GOT ebx ; get GOT address ; ---- Pass 1: process columns from input, store into work array. ; mov eax, [original_ebp] mov edx, POINTER [dct_table(eax)] ; quantptr mov esi, JCOEFPTR [coef_block(eax)] ; inptr lea edi, [workspace] ; FAST_FLOAT *wsptr mov ecx, DCTSIZE / 4 ; ctr ALIGNX 16, 7 .columnloop: %ifndef NO_ZERO_COLUMN_TEST_FLOAT_SSE mov eax, dword [DWBLOCK(1, 0, esi, SIZEOF_JCOEF)] or eax, dword [DWBLOCK(2, 0, esi, SIZEOF_JCOEF)] jnz near .columnDCT movq xmm1, XMM_MMWORD [MMBLOCK(1, 0, esi, SIZEOF_JCOEF)] movq xmm2, XMM_MMWORD [MMBLOCK(2, 0, esi, SIZEOF_JCOEF)] movq xmm3, XMM_MMWORD [MMBLOCK(3, 0, esi, SIZEOF_JCOEF)] movq xmm4, XMM_MMWORD [MMBLOCK(4, 0, esi, SIZEOF_JCOEF)] movq xmm5, XMM_MMWORD [MMBLOCK(5, 0, esi, SIZEOF_JCOEF)] movq xmm6, XMM_MMWORD [MMBLOCK(6, 0, esi, SIZEOF_JCOEF)] movq xmm7, XMM_MMWORD [MMBLOCK(7, 0, esi, SIZEOF_JCOEF)] por xmm1, xmm2 por xmm3, xmm4 por xmm5, xmm6 por xmm1, xmm3 por xmm5, xmm7 por xmm1, xmm5 packsswb xmm1, xmm1 movd eax, xmm1 test eax, eax jnz short .columnDCT ; -- AC terms all zero movq xmm0, XMM_MMWORD [MMBLOCK(0, 0, esi, SIZEOF_JCOEF)] punpcklwd xmm0, xmm0 ; xmm0 = (00 00 01 01 02 02 03 03) psrad xmm0, (DWORD_BIT - WORD_BIT) ; xmm0 = in0 = (00 01 02 03) cvtdq2ps xmm0, xmm0 ; xmm0 = in0 = (00 01 02 03) mulps xmm0, XMMWORD [XMMBLOCK(0, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] movaps xmm1, xmm0 movaps xmm2, xmm0 movaps xmm3, xmm0 shufps xmm0, xmm0, 0x00 ; xmm0 = (00 00 00 00) shufps xmm1, xmm1, 0x55 ; xmm1 = (01 01 01 01) shufps xmm2, xmm2, 0xAA ; xmm2 = (02 02 02 02) shufps xmm3, xmm3, 0xFF ; xmm3 = (03 03 03 03) movaps XMMWORD [XMMBLOCK(0, 0, edi, SIZEOF_FAST_FLOAT)], xmm0 movaps XMMWORD [XMMBLOCK(0, 1, edi, SIZEOF_FAST_FLOAT)], xmm0 movaps XMMWORD [XMMBLOCK(1, 0, edi, SIZEOF_FAST_FLOAT)], xmm1 movaps XMMWORD [XMMBLOCK(1, 1, edi, SIZEOF_FAST_FLOAT)], xmm1 movaps XMMWORD [XMMBLOCK(2, 0, edi, SIZEOF_FAST_FLOAT)], xmm2 movaps XMMWORD [XMMBLOCK(2, 1, edi, SIZEOF_FAST_FLOAT)], xmm2 movaps XMMWORD [XMMBLOCK(3, 0, edi, SIZEOF_FAST_FLOAT)], xmm3 movaps XMMWORD [XMMBLOCK(3, 1, edi, SIZEOF_FAST_FLOAT)], xmm3 jmp near .nextcolumn ALIGNX 16, 7 %endif .columnDCT: ; -- Even part movq xmm0, XMM_MMWORD [MMBLOCK(0, 0, esi, SIZEOF_JCOEF)] movq xmm1, XMM_MMWORD [MMBLOCK(2, 0, esi, SIZEOF_JCOEF)] movq xmm2, XMM_MMWORD [MMBLOCK(4, 0, esi, SIZEOF_JCOEF)] movq xmm3, XMM_MMWORD [MMBLOCK(6, 0, esi, SIZEOF_JCOEF)] punpcklwd xmm0, xmm0 ; xmm0 = (00 00 01 01 02 02 03 03) punpcklwd xmm1, xmm1 ; xmm1 = (20 20 21 21 22 22 23 23) psrad xmm0, (DWORD_BIT - WORD_BIT) ; xmm0 = in0 = (00 01 02 03) psrad xmm1, (DWORD_BIT - WORD_BIT) ; xmm1 = in2 = (20 21 22 23) cvtdq2ps xmm0, xmm0 ; xmm0 = in0 = (00 01 02 03) cvtdq2ps xmm1, xmm1 ; xmm1 = in2 = (20 21 22 23) punpcklwd xmm2, xmm2 ; xmm2 = (40 40 41 41 42 42 43 43) punpcklwd xmm3, xmm3 ; xmm3 = (60 60 61 61 62 62 63 63) psrad xmm2, (DWORD_BIT - WORD_BIT) ; xmm2 = in4 = (40 41 42 43) psrad xmm3, (DWORD_BIT - WORD_BIT) ; xmm3 = in6 = (60 61 62 63) cvtdq2ps xmm2, xmm2 ; xmm2 = in4 = (40 41 42 43) cvtdq2ps xmm3, xmm3 ; xmm3 = in6 = (60 61 62 63) mulps xmm0, XMMWORD [XMMBLOCK(0, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] mulps xmm1, XMMWORD [XMMBLOCK(2, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] mulps xmm2, XMMWORD [XMMBLOCK(4, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] mulps xmm3, XMMWORD [XMMBLOCK(6, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] movaps xmm4, xmm0 movaps xmm5, xmm1 subps xmm0, xmm2 ; xmm0 = tmp11 subps xmm1, xmm3 addps xmm4, xmm2 ; xmm4 = tmp10 addps xmm5, xmm3 ; xmm5 = tmp13 mulps xmm1, [GOTOFF(ebx, PD_1_414)] subps xmm1, xmm5 ; xmm1 = tmp12 movaps xmm6, xmm4 movaps xmm7, xmm0 subps xmm4, xmm5 ; xmm4 = tmp3 subps xmm0, xmm1 ; xmm0 = tmp2 addps xmm6, xmm5 ; xmm6 = tmp0 addps xmm7, xmm1 ; xmm7 = tmp1 movaps XMMWORD [wk(1)], xmm4 ; tmp3 movaps XMMWORD [wk(0)], xmm0 ; tmp2 ; -- Odd part movq xmm2, XMM_MMWORD [MMBLOCK(1, 0, esi, SIZEOF_JCOEF)] movq xmm3, XMM_MMWORD [MMBLOCK(3, 0, esi, SIZEOF_JCOEF)] movq xmm5, XMM_MMWORD [MMBLOCK(5, 0, esi, SIZEOF_JCOEF)] movq xmm1, XMM_MMWORD [MMBLOCK(7, 0, esi, SIZEOF_JCOEF)] punpcklwd xmm2, xmm2 ; xmm2 = (10 10 11 11 12 12 13 13) punpcklwd xmm3, xmm3 ; xmm3 = (30 30 31 31 32 32 33 33) psrad xmm2, (DWORD_BIT - WORD_BIT) ; xmm2 = in1 = (10 11 12 13) psrad xmm3, (DWORD_BIT - WORD_BIT) ; xmm3 = in3 = (30 31 32 33) cvtdq2ps xmm2, xmm2 ; xmm2 = in1 = (10 11 12 13) cvtdq2ps xmm3, xmm3 ; xmm3 = in3 = (30 31 32 33) punpcklwd xmm5, xmm5 ; xmm5 = (50 50 51 51 52 52 53 53) punpcklwd xmm1, xmm1 ; xmm1 = (70 70 71 71 72 72 73 73) psrad xmm5, (DWORD_BIT - WORD_BIT) ; xmm5 = in5 = (50 51 52 53) psrad xmm1, (DWORD_BIT - WORD_BIT) ; xmm1 = in7 = (70 71 72 73) cvtdq2ps xmm5, xmm5 ; xmm5 = in5 = (50 51 52 53) cvtdq2ps xmm1, xmm1 ; xmm1 = in7 = (70 71 72 73) mulps xmm2, XMMWORD [XMMBLOCK(1, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] mulps xmm3, XMMWORD [XMMBLOCK(3, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] mulps xmm5, XMMWORD [XMMBLOCK(5, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] mulps xmm1, XMMWORD [XMMBLOCK(7, 0, edx, SIZEOF_FLOAT_MULT_TYPE)] movaps xmm4, xmm2 movaps xmm0, xmm5 addps xmm2, xmm1 ; xmm2 = z11 addps xmm5, xmm3 ; xmm5 = z13 subps xmm4, xmm1 ; xmm4 = z12 subps xmm0, xmm3 ; xmm0 = z10 movaps xmm1, xmm2 subps xmm2, xmm5 addps xmm1, xmm5 ; xmm1 = tmp7 mulps xmm2, [GOTOFF(ebx, PD_1_414)] ; xmm2 = tmp11 movaps xmm3, xmm0 addps xmm0, xmm4 mulps xmm0, [GOTOFF(ebx, PD_1_847)] ; xmm0 = z5 mulps xmm3, [GOTOFF(ebx, PD_M2_613)] ; xmm3 = (z10 * -2.613125930) mulps xmm4, [GOTOFF(ebx, PD_1_082)] ; xmm4 = (z12 * 1.082392200) addps xmm3, xmm0 ; xmm3 = tmp12 subps xmm4, xmm0 ; xmm4 = tmp10 ; -- Final output stage subps xmm3, xmm1 ; xmm3 = tmp6 movaps xmm5, xmm6 movaps xmm0, xmm7 addps xmm6, xmm1 ; xmm6 = data0 = (00 01 02 03) addps xmm7, xmm3 ; xmm7 = data1 = (10 11 12 13) subps xmm5, xmm1 ; xmm5 = data7 = (70 71 72 73) subps xmm0, xmm3 ; xmm0 = data6 = (60 61 62 63) subps xmm2, xmm3 ; xmm2 = tmp5 movaps xmm1, xmm6 ; transpose coefficients(phase 1) unpcklps xmm6, xmm7 ; xmm6 = (00 10 01 11) unpckhps xmm1, xmm7 ; xmm1 = (02 12 03 13) movaps xmm3, xmm0 ; transpose coefficients(phase 1) unpcklps xmm0, xmm5 ; xmm0 = (60 70 61 71) unpckhps xmm3, xmm5 ; xmm3 = (62 72 63 73) movaps xmm7, XMMWORD [wk(0)] ; xmm7 = tmp2 movaps xmm5, XMMWORD [wk(1)] ; xmm5 = tmp3 movaps XMMWORD [wk(0)], xmm0 ; wk(0) = (60 70 61 71) movaps XMMWORD [wk(1)], xmm3 ; wk(1) = (62 72 63 73) addps xmm4, xmm2 ; xmm4 = tmp4 movaps xmm0, xmm7 movaps xmm3, xmm5 addps xmm7, xmm2 ; xmm7 = data2 = (20 21 22 23) addps xmm5, xmm4 ; xmm5 = data4 = (40 41 42 43) subps xmm0, xmm2 ; xmm0 = data5 = (50 51 52 53) subps xmm3, xmm4 ; xmm3 = data3 = (30 31 32 33) movaps xmm2, xmm7 ; transpose coefficients(phase 1) unpcklps xmm7, xmm3 ; xmm7 = (20 30 21 31) unpckhps xmm2, xmm3 ; xmm2 = (22 32 23 33) movaps xmm4, xmm5 ; transpose coefficients(phase 1) unpcklps xmm5, xmm0 ; xmm5 = (40 50 41 51) unpckhps xmm4, xmm0 ; xmm4 = (42 52 43 53) movaps xmm3, xmm6 ; transpose coefficients(phase 2) UNPCKLPS2 xmm6, xmm7 ; xmm6 = (00 10 20 30) UNPCKHPS2 xmm3, xmm7 ; xmm3 = (01 11 21 31) movaps xmm0, xmm1 ; transpose coefficients(phase 2) UNPCKLPS2 xmm1, xmm2 ; xmm1 = (02 12 22 32) UNPCKHPS2 xmm0, xmm2 ; xmm0 = (03 13 23 33) movaps xmm7, XMMWORD [wk(0)] ; xmm7 = (60 70 61 71) movaps xmm2, XMMWORD [wk(1)] ; xmm2 = (62 72 63 73) movaps XMMWORD [XMMBLOCK(0, 0, edi, SIZEOF_FAST_FLOAT)], xmm6 movaps XMMWORD [XMMBLOCK(1, 0, edi, SIZEOF_FAST_FLOAT)], xmm3 movaps XMMWORD [XMMBLOCK(2, 0, edi, SIZEOF_FAST_FLOAT)], xmm1 movaps XMMWORD [XMMBLOCK(3, 0, edi, SIZEOF_FAST_FLOAT)], xmm0 movaps xmm6, xmm5 ; transpose coefficients(phase 2) UNPCKLPS2 xmm5, xmm7 ; xmm5 = (40 50 60 70) UNPCKHPS2 xmm6, xmm7 ; xmm6 = (41 51 61 71) movaps xmm3, xmm4 ; transpose coefficients(phase 2) UNPCKLPS2 xmm4, xmm2 ; xmm4 = (42 52 62 72) UNPCKHPS2 xmm3, xmm2 ; xmm3 = (43 53 63 73) movaps XMMWORD [XMMBLOCK(0, 1, edi, SIZEOF_FAST_FLOAT)], xmm5 movaps XMMWORD [XMMBLOCK(1, 1, edi, SIZEOF_FAST_FLOAT)], xmm6 movaps XMMWORD [XMMBLOCK(2, 1, edi, SIZEOF_FAST_FLOAT)], xmm4 movaps XMMWORD [XMMBLOCK(3, 1, edi, SIZEOF_FAST_FLOAT)], xmm3 .nextcolumn: add esi, byte 4 * SIZEOF_JCOEF ; coef_block add edx, byte 4 * SIZEOF_FLOAT_MULT_TYPE ; quantptr add edi, 4 * DCTSIZE * SIZEOF_FAST_FLOAT ; wsptr dec ecx ; ctr jnz near .columnloop ; -- Prefetch the next coefficient block prefetchnta [esi + (DCTSIZE2 - 8) * SIZEOF_JCOEF + 0 * 32] prefetchnta [esi + (DCTSIZE2 - 8) * SIZEOF_JCOEF + 1 * 32] prefetchnta [esi + (DCTSIZE2 - 8) * SIZEOF_JCOEF + 2 * 32] prefetchnta [esi + (DCTSIZE2 - 8) * SIZEOF_JCOEF + 3 * 32] ; ---- Pass 2: process rows from work array, store into output array. mov eax, [original_ebp] lea esi, [workspace] ; FAST_FLOAT *wsptr mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *) mov eax, JDIMENSION [output_col(eax)] mov ecx, DCTSIZE / 4 ; ctr ALIGNX 16, 7 .rowloop: ; -- Even part movaps xmm0, XMMWORD [XMMBLOCK(0, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm1, XMMWORD [XMMBLOCK(2, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm2, XMMWORD [XMMBLOCK(4, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm3, XMMWORD [XMMBLOCK(6, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm4, xmm0 movaps xmm5, xmm1 subps xmm0, xmm2 ; xmm0 = tmp11 subps xmm1, xmm3 addps xmm4, xmm2 ; xmm4 = tmp10 addps xmm5, xmm3 ; xmm5 = tmp13 mulps xmm1, [GOTOFF(ebx, PD_1_414)] subps xmm1, xmm5 ; xmm1 = tmp12 movaps xmm6, xmm4 movaps xmm7, xmm0 subps xmm4, xmm5 ; xmm4 = tmp3 subps xmm0, xmm1 ; xmm0 = tmp2 addps xmm6, xmm5 ; xmm6 = tmp0 addps xmm7, xmm1 ; xmm7 = tmp1 movaps XMMWORD [wk(1)], xmm4 ; tmp3 movaps XMMWORD [wk(0)], xmm0 ; tmp2 ; -- Odd part movaps xmm2, XMMWORD [XMMBLOCK(1, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm3, XMMWORD [XMMBLOCK(3, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm5, XMMWORD [XMMBLOCK(5, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm1, XMMWORD [XMMBLOCK(7, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm4, xmm2 movaps xmm0, xmm5 addps xmm2, xmm1 ; xmm2 = z11 addps xmm5, xmm3 ; xmm5 = z13 subps xmm4, xmm1 ; xmm4 = z12 subps xmm0, xmm3 ; xmm0 = z10 movaps xmm1, xmm2 subps xmm2, xmm5 addps xmm1, xmm5 ; xmm1 = tmp7 mulps xmm2, [GOTOFF(ebx, PD_1_414)] ; xmm2 = tmp11 movaps xmm3, xmm0 addps xmm0, xmm4 mulps xmm0, [GOTOFF(ebx, PD_1_847)] ; xmm0 = z5 mulps xmm3, [GOTOFF(ebx, PD_M2_613)] ; xmm3 = (z10 * -2.613125930) mulps xmm4, [GOTOFF(ebx, PD_1_082)] ; xmm4 = (z12 * 1.082392200) addps xmm3, xmm0 ; xmm3 = tmp12 subps xmm4, xmm0 ; xmm4 = tmp10 ; -- Final output stage subps xmm3, xmm1 ; xmm3 = tmp6 movaps xmm5, xmm6 movaps xmm0, xmm7 addps xmm6, xmm1 ; xmm6 = data0 = (00 10 20 30) addps xmm7, xmm3 ; xmm7 = data1 = (01 11 21 31) subps xmm5, xmm1 ; xmm5 = data7 = (07 17 27 37) subps xmm0, xmm3 ; xmm0 = data6 = (06 16 26 36) subps xmm2, xmm3 ; xmm2 = tmp5 movaps xmm1, [GOTOFF(ebx, PD_RNDINT_MAGIC)] ; xmm1 = [PD_RNDINT_MAGIC] pcmpeqd xmm3, xmm3 psrld xmm3, WORD_BIT ; xmm3 = { 0xFFFF 0x0000 0xFFFF 0x0000 .. } addps xmm6, xmm1 ; xmm6 = roundint(data0 / 8) = (00 ** 10 ** 20 ** 30 **) addps xmm7, xmm1 ; xmm7 = roundint(data1 / 8) = (01 ** 11 ** 21 ** 31 **) addps xmm0, xmm1 ; xmm0 = roundint(data6 / 8) = (06 ** 16 ** 26 ** 36 **) addps xmm5, xmm1 ; xmm5 = roundint(data7 / 8) = (07 ** 17 ** 27 ** 37 **) pand xmm6, xmm3 ; xmm6 = (00 -- 10 -- 20 -- 30 --) pslld xmm7, WORD_BIT ; xmm7 = (-- 01 -- 11 -- 21 -- 31) pand xmm0, xmm3 ; xmm0 = (06 -- 16 -- 26 -- 36 --) pslld xmm5, WORD_BIT ; xmm5 = (-- 07 -- 17 -- 27 -- 37) por xmm6, xmm7 ; xmm6 = (00 01 10 11 20 21 30 31) por xmm0, xmm5 ; xmm0 = (06 07 16 17 26 27 36 37) movaps xmm1, XMMWORD [wk(0)] ; xmm1 = tmp2 movaps xmm3, XMMWORD [wk(1)] ; xmm3 = tmp3 addps xmm4, xmm2 ; xmm4 = tmp4 movaps xmm7, xmm1 movaps xmm5, xmm3 addps xmm1, xmm2 ; xmm1 = data2 = (02 12 22 32) addps xmm3, xmm4 ; xmm3 = data4 = (04 14 24 34) subps xmm7, xmm2 ; xmm7 = data5 = (05 15 25 35) subps xmm5, xmm4 ; xmm5 = data3 = (03 13 23 33) movaps xmm2, [GOTOFF(ebx, PD_RNDINT_MAGIC)] ; xmm2 = [PD_RNDINT_MAGIC] pcmpeqd xmm4, xmm4 psrld xmm4, WORD_BIT ; xmm4 = { 0xFFFF 0x0000 0xFFFF 0x0000 .. } addps xmm3, xmm2 ; xmm3 = roundint(data4 / 8) = (04 ** 14 ** 24 ** 34 **) addps xmm7, xmm2 ; xmm7 = roundint(data5 / 8) = (05 ** 15 ** 25 ** 35 **) addps xmm1, xmm2 ; xmm1 = roundint(data2 / 8) = (02 ** 12 ** 22 ** 32 **) addps xmm5, xmm2 ; xmm5 = roundint(data3 / 8) = (03 ** 13 ** 23 ** 33 **) pand xmm3, xmm4 ; xmm3 = (04 -- 14 -- 24 -- 34 --) pslld xmm7, WORD_BIT ; xmm7 = (-- 05 -- 15 -- 25 -- 35) pand xmm1, xmm4 ; xmm1 = (02 -- 12 -- 22 -- 32 --) pslld xmm5, WORD_BIT ; xmm5 = (-- 03 -- 13 -- 23 -- 33) por xmm3, xmm7 ; xmm3 = (04 05 14 15 24 25 34 35) por xmm1, xmm5 ; xmm1 = (02 03 12 13 22 23 32 33) movdqa xmm2, [GOTOFF(ebx, PB_CENTERJSAMP)] ; xmm2 = [PB_CENTERJSAMP] packsswb xmm6, xmm3 ; xmm6 = (00 01 10 11 20 21 30 31 04 05 14 15 24 25 34 35) packsswb xmm1, xmm0 ; xmm1 = (02 03 12 13 22 23 32 33 06 07 16 17 26 27 36 37) paddb xmm6, xmm2 paddb xmm1, xmm2 ; transpose coefficients(phase 2) movdqa xmm4, xmm6 punpcklwd xmm6, xmm1 ; xmm6 = (00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33) punpckhwd xmm4, xmm1 ; xmm4 = (04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37) ; transpose coefficients(phase 3) movdqa xmm7, xmm6 punpckldq xmm6, xmm4 ; xmm6 = (00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17) punpckhdq xmm7, xmm4 ; xmm7 = (20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37) pshufd xmm5, xmm6, 0x4E ; xmm5 = (10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07) pshufd xmm3, xmm7, 0x4E ; xmm3 = (30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27) PUSHPIC ebx ; save GOT address mov edx, JSAMPROW [edi + 0 * SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi + 2 * SIZEOF_JSAMPROW] movq XMM_MMWORD [edx + eax * SIZEOF_JSAMPLE], xmm6 movq XMM_MMWORD [ebx + eax * SIZEOF_JSAMPLE], xmm7 mov edx, JSAMPROW [edi + 1 * SIZEOF_JSAMPROW] mov ebx, JSAMPROW [edi + 3 * SIZEOF_JSAMPROW] movq XMM_MMWORD [edx + eax * SIZEOF_JSAMPLE], xmm5 movq XMM_MMWORD [ebx + eax * SIZEOF_JSAMPLE], xmm3 POPPIC ebx ; restore GOT address add esi, byte 4 * SIZEOF_FAST_FLOAT ; wsptr add edi, byte 4 * SIZEOF_JSAMPROW dec ecx ; ctr jnz near .rowloop 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