189 lines
6.7 KiB
NASM
189 lines
6.7 KiB
NASM
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; jquanti.asm - sample data conversion and quantization (AVX2)
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;
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; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
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; Copyright (C) 2016, 2018, D. R. Commander.
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; Copyright (C) 2016, Matthieu Darbois.
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;
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; Based on the x86 SIMD extension for IJG JPEG library
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; Copyright (C) 1999-2006, MIYASAKA Masaru.
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; For conditions of distribution and use, see copyright notice in jsimdext.inc
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;
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; This file should be assembled with NASM (Netwide Assembler),
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; can *not* be assembled with Microsoft's MASM or any compatible
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; assembler (including Borland's Turbo Assembler).
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; NASM is available from http://nasm.sourceforge.net/ or
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; http://sourceforge.net/project/showfiles.php?group_id=6208
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%include "jsimdext.inc"
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%include "jdct.inc"
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; --------------------------------------------------------------------------
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SECTION SEG_TEXT
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BITS 32
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;
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; Load data into workspace, applying unsigned->signed conversion
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;
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; GLOBAL(void)
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; jsimd_convsamp_avx2(JSAMPARRAY sample_data, JDIMENSION start_col,
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; DCTELEM *workspace);
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;
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%define sample_data ebp + 8 ; JSAMPARRAY sample_data
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%define start_col ebp + 12 ; JDIMENSION start_col
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%define workspace ebp + 16 ; DCTELEM *workspace
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align 32
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GLOBAL_FUNCTION(jsimd_convsamp_avx2)
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EXTN(jsimd_convsamp_avx2):
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push ebp
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mov ebp, esp
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push ebx
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; push ecx ; need not be preserved
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; push edx ; need not be preserved
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push esi
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push edi
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mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *)
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mov eax, JDIMENSION [start_col]
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mov edi, POINTER [workspace] ; (DCTELEM *)
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mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm0, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE]
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movq xmm1, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE]
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mov ebx, JSAMPROW [esi+2*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov edx, JSAMPROW [esi+3*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm2, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE]
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movq xmm3, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE]
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mov ebx, JSAMPROW [esi+4*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov edx, JSAMPROW [esi+5*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm4, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE]
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movq xmm5, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE]
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mov ebx, JSAMPROW [esi+6*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov edx, JSAMPROW [esi+7*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm6, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE]
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movq xmm7, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE]
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vinserti128 ymm0, ymm0, xmm1, 1
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vinserti128 ymm2, ymm2, xmm3, 1
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vinserti128 ymm4, ymm4, xmm5, 1
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vinserti128 ymm6, ymm6, xmm7, 1
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vpxor ymm1, ymm1, ymm1 ; ymm1=(all 0's)
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vpunpcklbw ymm0, ymm0, ymm1
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vpunpcklbw ymm2, ymm2, ymm1
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vpunpcklbw ymm4, ymm4, ymm1
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vpunpcklbw ymm6, ymm6, ymm1
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vpcmpeqw ymm7, ymm7, ymm7
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vpsllw ymm7, ymm7, 7 ; ymm7={0xFF80 0xFF80 0xFF80 0xFF80 ..}
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vpaddw ymm0, ymm0, ymm7
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vpaddw ymm2, ymm2, ymm7
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vpaddw ymm4, ymm4, ymm7
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vpaddw ymm6, ymm6, ymm7
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vmovdqu YMMWORD [YMMBLOCK(0,0,edi,SIZEOF_DCTELEM)], ymm0
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vmovdqu YMMWORD [YMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], ymm2
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vmovdqu YMMWORD [YMMBLOCK(4,0,edi,SIZEOF_DCTELEM)], ymm4
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vmovdqu YMMWORD [YMMBLOCK(6,0,edi,SIZEOF_DCTELEM)], ymm6
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vzeroupper
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pop edi
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pop esi
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; pop edx ; need not be preserved
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; pop ecx ; need not be preserved
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pop ebx
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pop ebp
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ret
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; --------------------------------------------------------------------------
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;
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; Quantize/descale the coefficients, and store into coef_block
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;
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; This implementation is based on an algorithm described in
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; "How to optimize for the Pentium family of microprocessors"
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; (http://www.agner.org/assem/).
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;
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; GLOBAL(void)
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; jsimd_quantize_avx2(JCOEFPTR coef_block, DCTELEM *divisors,
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; DCTELEM *workspace);
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;
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%define RECIPROCAL(m, n, b) \
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YMMBLOCK(DCTSIZE * 0 + (m), (n), (b), SIZEOF_DCTELEM)
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%define CORRECTION(m, n, b) \
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YMMBLOCK(DCTSIZE * 1 + (m), (n), (b), SIZEOF_DCTELEM)
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%define SCALE(m, n, b) \
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YMMBLOCK(DCTSIZE * 2 + (m), (n), (b), SIZEOF_DCTELEM)
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%define coef_block ebp + 8 ; JCOEFPTR coef_block
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%define divisors ebp + 12 ; DCTELEM *divisors
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%define workspace ebp + 16 ; DCTELEM *workspace
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align 32
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GLOBAL_FUNCTION(jsimd_quantize_avx2)
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EXTN(jsimd_quantize_avx2):
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push ebp
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mov ebp, esp
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; push ebx ; unused
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; push ecx ; unused
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; push edx ; need not be preserved
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push esi
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push edi
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mov esi, POINTER [workspace]
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mov edx, POINTER [divisors]
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mov edi, JCOEFPTR [coef_block]
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vmovdqu ymm4, [YMMBLOCK(0,0,esi,SIZEOF_DCTELEM)]
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vmovdqu ymm5, [YMMBLOCK(2,0,esi,SIZEOF_DCTELEM)]
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vmovdqu ymm6, [YMMBLOCK(4,0,esi,SIZEOF_DCTELEM)]
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vmovdqu ymm7, [YMMBLOCK(6,0,esi,SIZEOF_DCTELEM)]
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vpabsw ymm0, ymm4
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vpabsw ymm1, ymm5
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vpabsw ymm2, ymm6
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vpabsw ymm3, ymm7
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vpaddw ymm0, YMMWORD [CORRECTION(0,0,edx)] ; correction + roundfactor
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vpaddw ymm1, YMMWORD [CORRECTION(2,0,edx)]
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vpaddw ymm2, YMMWORD [CORRECTION(4,0,edx)]
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vpaddw ymm3, YMMWORD [CORRECTION(6,0,edx)]
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vpmulhuw ymm0, YMMWORD [RECIPROCAL(0,0,edx)] ; reciprocal
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vpmulhuw ymm1, YMMWORD [RECIPROCAL(2,0,edx)]
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vpmulhuw ymm2, YMMWORD [RECIPROCAL(4,0,edx)]
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vpmulhuw ymm3, YMMWORD [RECIPROCAL(6,0,edx)]
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vpmulhuw ymm0, YMMWORD [SCALE(0,0,edx)] ; scale
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vpmulhuw ymm1, YMMWORD [SCALE(2,0,edx)]
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vpmulhuw ymm2, YMMWORD [SCALE(4,0,edx)]
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vpmulhuw ymm3, YMMWORD [SCALE(6,0,edx)]
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vpsignw ymm0, ymm0, ymm4
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vpsignw ymm1, ymm1, ymm5
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vpsignw ymm2, ymm2, ymm6
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vpsignw ymm3, ymm3, ymm7
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vmovdqu [YMMBLOCK(0,0,edi,SIZEOF_DCTELEM)], ymm0
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vmovdqu [YMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], ymm1
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vmovdqu [YMMBLOCK(4,0,edi,SIZEOF_DCTELEM)], ymm2
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vmovdqu [YMMBLOCK(6,0,edi,SIZEOF_DCTELEM)], ymm3
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vzeroupper
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pop edi
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pop esi
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; pop edx ; need not be preserved
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; pop ecx ; unused
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; pop ebx ; unused
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pop ebp
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ret
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; For some reason, the OS X linker does not honor the request to align the
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; segment unless we do this.
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align 32
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