; ; jquanti.asm - sample data conversion and quantization (AVX2) ; ; Copyright 2009 Pierre Ossman for Cendio AB ; Copyright (C) 2016, 2018, D. R. Commander. ; Copyright (C) 2016, Matthieu Darbois. ; ; 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 %include "jsimdext.inc" %include "jdct.inc" ; -------------------------------------------------------------------------- SECTION SEG_TEXT BITS 32 ; ; Load data into workspace, applying unsigned->signed conversion ; ; GLOBAL(void) ; jsimd_convsamp_avx2(JSAMPARRAY sample_data, JDIMENSION start_col, ; DCTELEM *workspace); ; %define sample_data ebp + 8 ; JSAMPARRAY sample_data %define start_col ebp + 12 ; JDIMENSION start_col %define workspace ebp + 16 ; DCTELEM *workspace align 32 GLOBAL_FUNCTION(jsimd_convsamp_avx2) EXTN(jsimd_convsamp_avx2): push ebp mov ebp, esp push ebx ; push ecx ; need not be preserved ; push edx ; need not be preserved push esi push edi mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *) mov eax, JDIMENSION [start_col] mov edi, POINTER [workspace] ; (DCTELEM *) mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *) mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *) movq xmm0, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] movq xmm1, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] mov ebx, JSAMPROW [esi+2*SIZEOF_JSAMPROW] ; (JSAMPLE *) mov edx, JSAMPROW [esi+3*SIZEOF_JSAMPROW] ; (JSAMPLE *) movq xmm2, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] movq xmm3, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] mov ebx, JSAMPROW [esi+4*SIZEOF_JSAMPROW] ; (JSAMPLE *) mov edx, JSAMPROW [esi+5*SIZEOF_JSAMPROW] ; (JSAMPLE *) movq xmm4, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] movq xmm5, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] mov ebx, JSAMPROW [esi+6*SIZEOF_JSAMPROW] ; (JSAMPLE *) mov edx, JSAMPROW [esi+7*SIZEOF_JSAMPROW] ; (JSAMPLE *) movq xmm6, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] movq xmm7, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] vinserti128 ymm0, ymm0, xmm1, 1 vinserti128 ymm2, ymm2, xmm3, 1 vinserti128 ymm4, ymm4, xmm5, 1 vinserti128 ymm6, ymm6, xmm7, 1 vpxor ymm1, ymm1, ymm1 ; ymm1=(all 0's) vpunpcklbw ymm0, ymm0, ymm1 vpunpcklbw ymm2, ymm2, ymm1 vpunpcklbw ymm4, ymm4, ymm1 vpunpcklbw ymm6, ymm6, ymm1 vpcmpeqw ymm7, ymm7, ymm7 vpsllw ymm7, ymm7, 7 ; ymm7={0xFF80 0xFF80 0xFF80 0xFF80 ..} vpaddw ymm0, ymm0, ymm7 vpaddw ymm2, ymm2, ymm7 vpaddw ymm4, ymm4, ymm7 vpaddw ymm6, ymm6, ymm7 vmovdqu YMMWORD [YMMBLOCK(0,0,edi,SIZEOF_DCTELEM)], ymm0 vmovdqu YMMWORD [YMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], ymm2 vmovdqu YMMWORD [YMMBLOCK(4,0,edi,SIZEOF_DCTELEM)], ymm4 vmovdqu YMMWORD [YMMBLOCK(6,0,edi,SIZEOF_DCTELEM)], ymm6 vzeroupper 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 ; ; This implementation is based on an algorithm described in ; "How to optimize for the Pentium family of microprocessors" ; (http://www.agner.org/assem/). ; ; GLOBAL(void) ; jsimd_quantize_avx2(JCOEFPTR coef_block, DCTELEM *divisors, ; DCTELEM *workspace); ; %define RECIPROCAL(m, n, b) \ YMMBLOCK(DCTSIZE * 0 + (m), (n), (b), SIZEOF_DCTELEM) %define CORRECTION(m, n, b) \ YMMBLOCK(DCTSIZE * 1 + (m), (n), (b), SIZEOF_DCTELEM) %define SCALE(m, n, b) \ YMMBLOCK(DCTSIZE * 2 + (m), (n), (b), SIZEOF_DCTELEM) %define coef_block ebp + 8 ; JCOEFPTR coef_block %define divisors ebp + 12 ; DCTELEM *divisors %define workspace ebp + 16 ; DCTELEM *workspace align 32 GLOBAL_FUNCTION(jsimd_quantize_avx2) EXTN(jsimd_quantize_avx2): 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] vmovdqu ymm4, [YMMBLOCK(0,0,esi,SIZEOF_DCTELEM)] vmovdqu ymm5, [YMMBLOCK(2,0,esi,SIZEOF_DCTELEM)] vmovdqu ymm6, [YMMBLOCK(4,0,esi,SIZEOF_DCTELEM)] vmovdqu ymm7, [YMMBLOCK(6,0,esi,SIZEOF_DCTELEM)] vpabsw ymm0, ymm4 vpabsw ymm1, ymm5 vpabsw ymm2, ymm6 vpabsw ymm3, ymm7 vpaddw ymm0, YMMWORD [CORRECTION(0,0,edx)] ; correction + roundfactor vpaddw ymm1, YMMWORD [CORRECTION(2,0,edx)] vpaddw ymm2, YMMWORD [CORRECTION(4,0,edx)] vpaddw ymm3, YMMWORD [CORRECTION(6,0,edx)] vpmulhuw ymm0, YMMWORD [RECIPROCAL(0,0,edx)] ; reciprocal vpmulhuw ymm1, YMMWORD [RECIPROCAL(2,0,edx)] vpmulhuw ymm2, YMMWORD [RECIPROCAL(4,0,edx)] vpmulhuw ymm3, YMMWORD [RECIPROCAL(6,0,edx)] vpmulhuw ymm0, YMMWORD [SCALE(0,0,edx)] ; scale vpmulhuw ymm1, YMMWORD [SCALE(2,0,edx)] vpmulhuw ymm2, YMMWORD [SCALE(4,0,edx)] vpmulhuw ymm3, YMMWORD [SCALE(6,0,edx)] vpsignw ymm0, ymm0, ymm4 vpsignw ymm1, ymm1, ymm5 vpsignw ymm2, ymm2, ymm6 vpsignw ymm3, ymm3, ymm7 vmovdqu [YMMBLOCK(0,0,edi,SIZEOF_DCTELEM)], ymm0 vmovdqu [YMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], ymm1 vmovdqu [YMMBLOCK(4,0,edi,SIZEOF_DCTELEM)], ymm2 vmovdqu [YMMBLOCK(6,0,edi,SIZEOF_DCTELEM)], ymm3 vzeroupper 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