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kc3-lang/libjpeg-turbo/simd/i386/jquant-sse.asm
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- simd/i386/jquant-sse.asm
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; ; Sample data conversion and quantization (32-bit SSE & MMX) ; ; 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. %include "jsimdext.inc" %include "jdct.inc" ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; Load data into workspace, applying unsigned->signed conversion ; ; GLOBAL(void) ; jsimd_convsamp_float_sse(JSAMPARRAY sample_data, JDIMENSION start_col, ; FAST_FLOAT *workspace) %define sample_data ebp + 8 ; JSAMPARRAY sample_data %define start_col ebp + 12 ; JDIMENSION start_col %define workspace ebp + 16 ; FAST_FLOAT *workspace align 32 GLOBAL_FUNCTION(jsimd_convsamp_float_sse) EXTN(jsimd_convsamp_float_sse): push ebp mov ebp, esp push ebx ; push ecx ; need not be preserved ; push edx ; need not be preserved push esi push edi pcmpeqw mm7, mm7 psllw mm7, 7 packsswb mm7, mm7 ; mm7 = PB_CENTERJSAMPLE (0x808080..) mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *) mov eax, JDIMENSION [start_col] mov edi, POINTER [workspace] ; (DCTELEM *) mov ecx, DCTSIZE / 2 ALIGNX 16, 7 .convloop: mov ebx, JSAMPROW [esi + 0 * SIZEOF_JSAMPROW] ; (JSAMPLE *) mov edx, JSAMPROW [esi + 1 * SIZEOF_JSAMPROW] ; (JSAMPLE *) movq mm0, MMWORD [ebx + eax * SIZEOF_JSAMPLE] movq mm1, MMWORD [edx + eax * SIZEOF_JSAMPLE] psubb mm0, mm7 ; mm0 = (01234567) psubb mm1, mm7 ; mm1 = (89abcdef) punpcklbw mm2, mm0 ; mm2 = (*0*1*2*3) punpckhbw mm0, mm0 ; mm0 = (*4*5*6*7) punpcklbw mm3, mm1 ; mm3 = (*8*9*a*b) punpckhbw mm1, mm1 ; mm1 = (*c*d*e*f) punpcklwd mm4, mm2 ; mm4 = (***0***1) punpckhwd mm2, mm2 ; mm2 = (***2***3) punpcklwd mm5, mm0 ; mm5 = (***4***5) punpckhwd mm0, mm0 ; mm0 = (***6***7) psrad mm4, (DWORD_BIT - BYTE_BIT) ; mm4 = (01) psrad mm2, (DWORD_BIT - BYTE_BIT) ; mm2 = (23) cvtpi2ps xmm0, mm4 ; xmm0 = (01**) cvtpi2ps xmm1, mm2 ; xmm1 = (23**) psrad mm5, (DWORD_BIT - BYTE_BIT) ; mm5 = (45) psrad mm0, (DWORD_BIT - BYTE_BIT) ; mm0 = (67) cvtpi2ps xmm2, mm5 ; xmm2 = (45**) cvtpi2ps xmm3, mm0 ; xmm3 = (67**) punpcklwd mm6, mm3 ; mm6 = (***8***9) punpckhwd mm3, mm3 ; mm3 = (***a***b) punpcklwd mm4, mm1 ; mm4 = (***c***d) punpckhwd mm1, mm1 ; mm1 = (***e***f) psrad mm6, (DWORD_BIT - BYTE_BIT) ; mm6 = (89) psrad mm3, (DWORD_BIT - BYTE_BIT) ; mm3 = (ab) cvtpi2ps xmm4, mm6 ; xmm4 = (89**) cvtpi2ps xmm5, mm3 ; xmm5 = (ab**) psrad mm4, (DWORD_BIT - BYTE_BIT) ; mm4 = (cd) psrad mm1, (DWORD_BIT - BYTE_BIT) ; mm1 = (ef) cvtpi2ps xmm6, mm4 ; xmm6 = (cd**) cvtpi2ps xmm7, mm1 ; xmm7 = (ef**) movlhps xmm0, xmm1 ; xmm0 = (0123) movlhps xmm2, xmm3 ; xmm2 = (4567) movlhps xmm4, xmm5 ; xmm4 = (89ab) movlhps xmm6, xmm7 ; xmm6 = (cdef) movaps XMMWORD [XMMBLOCK(0, 0, edi, SIZEOF_FAST_FLOAT)], xmm0 movaps XMMWORD [XMMBLOCK(0, 1, edi, SIZEOF_FAST_FLOAT)], xmm2 movaps XMMWORD [XMMBLOCK(1, 0, edi, SIZEOF_FAST_FLOAT)], xmm4 movaps XMMWORD [XMMBLOCK(1, 1, edi, SIZEOF_FAST_FLOAT)], xmm6 add esi, byte 2 * SIZEOF_JSAMPROW add edi, byte 2 * DCTSIZE * SIZEOF_FAST_FLOAT dec ecx jnz near .convloop emms ; empty MMX state pop edi pop esi ; pop edx ; need not be preserved ; pop ecx ; need not be preserved pop ebx pop ebp ret ; -------------------------------------------------------------------------- ; ; Quantize/descale the coefficients, and store into coef_block ; ; GLOBAL(void) ; jsimd_quantize_float_sse(JCOEFPTR coef_block, FAST_FLOAT *divisors, ; FAST_FLOAT *workspace) %define coef_block ebp + 8 ; JCOEFPTR coef_block %define divisors ebp + 12 ; FAST_FLOAT *divisors %define workspace ebp + 16 ; FAST_FLOAT *workspace align 32 GLOBAL_FUNCTION(jsimd_quantize_float_sse) EXTN(jsimd_quantize_float_sse): push ebp mov ebp, esp ; push ebx ; unused ; push ecx ; unused ; push edx ; need not be preserved push esi push edi mov esi, POINTER [workspace] mov edx, POINTER [divisors] mov edi, JCOEFPTR [coef_block] mov eax, DCTSIZE2 / 16 ALIGNX 16, 7 .quantloop: movaps xmm0, XMMWORD [XMMBLOCK(0, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm1, XMMWORD [XMMBLOCK(0, 1, esi, SIZEOF_FAST_FLOAT)] mulps xmm0, XMMWORD [XMMBLOCK(0, 0, edx, SIZEOF_FAST_FLOAT)] mulps xmm1, XMMWORD [XMMBLOCK(0, 1, edx, SIZEOF_FAST_FLOAT)] movaps xmm2, XMMWORD [XMMBLOCK(1, 0, esi, SIZEOF_FAST_FLOAT)] movaps xmm3, XMMWORD [XMMBLOCK(1, 1, esi, SIZEOF_FAST_FLOAT)] mulps xmm2, XMMWORD [XMMBLOCK(1, 0, edx, SIZEOF_FAST_FLOAT)] mulps xmm3, XMMWORD [XMMBLOCK(1, 1, edx, SIZEOF_FAST_FLOAT)] movhlps xmm4, xmm0 movhlps xmm5, xmm1 cvtps2pi mm0, xmm0 cvtps2pi mm1, xmm1 cvtps2pi mm4, xmm4 cvtps2pi mm5, xmm5 movhlps xmm6, xmm2 movhlps xmm7, xmm3 cvtps2pi mm2, xmm2 cvtps2pi mm3, xmm3 cvtps2pi mm6, xmm6 cvtps2pi mm7, xmm7 packssdw mm0, mm4 packssdw mm1, mm5 packssdw mm2, mm6 packssdw mm3, mm7 movq MMWORD [MMBLOCK(0, 0, edi, SIZEOF_JCOEF)], mm0 movq MMWORD [MMBLOCK(0, 1, edi, SIZEOF_JCOEF)], mm1 movq MMWORD [MMBLOCK(1, 0, edi, SIZEOF_JCOEF)], mm2 movq MMWORD [MMBLOCK(1, 1, edi, SIZEOF_JCOEF)], mm3 add esi, byte 16 * SIZEOF_FAST_FLOAT add edx, byte 16 * SIZEOF_FAST_FLOAT add edi, byte 16 * SIZEOF_JCOEF dec eax jnz short .quantloop emms ; empty MMX state pop edi pop esi ; pop edx ; need not be preserved ; pop ecx ; unused ; pop ebx ; unused 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