163 lines
5.7 KiB
NASM
163 lines
5.7 KiB
NASM
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; jquanti.asm - sample data conversion and quantization (64-bit 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) 2009, 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 64
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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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; r10 = JSAMPARRAY sample_data
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; r11d = JDIMENSION start_col
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; r12 = 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 rbp
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mov rax, rsp
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mov rbp, rsp
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collect_args 3
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mov eax, r11d
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mov rsi, JSAMPROW [r10+0*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov rdi, JSAMPROW [r10+1*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm0, XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE]
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pinsrq xmm0, XMM_MMWORD [rdi+rax*SIZEOF_JSAMPLE], 1
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mov rsi, JSAMPROW [r10+2*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov rdi, JSAMPROW [r10+3*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm1, XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE]
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pinsrq xmm1, XMM_MMWORD [rdi+rax*SIZEOF_JSAMPLE], 1
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mov rsi, JSAMPROW [r10+4*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov rdi, JSAMPROW [r10+5*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm2, XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE]
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pinsrq xmm2, XMM_MMWORD [rdi+rax*SIZEOF_JSAMPLE], 1
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mov rsi, JSAMPROW [r10+6*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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mov rdi, JSAMPROW [r10+7*SIZEOF_JSAMPROW] ; (JSAMPLE *)
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movq xmm3, XMM_MMWORD [rsi+rax*SIZEOF_JSAMPLE]
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pinsrq xmm3, XMM_MMWORD [rdi+rax*SIZEOF_JSAMPLE], 1
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vpmovzxbw ymm0, xmm0 ; ymm0=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
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vpmovzxbw ymm1, xmm1 ; ymm1=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
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vpmovzxbw ymm2, xmm2 ; ymm2=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
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vpmovzxbw ymm3, xmm3 ; ymm3=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
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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 ymm1, ymm1, ymm7
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vpaddw ymm2, ymm2, ymm7
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vpaddw ymm3, ymm3, ymm7
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vmovdqu YMMWORD [YMMBLOCK(0,0,r12,SIZEOF_DCTELEM)], ymm0
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vmovdqu YMMWORD [YMMBLOCK(2,0,r12,SIZEOF_DCTELEM)], ymm1
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vmovdqu YMMWORD [YMMBLOCK(4,0,r12,SIZEOF_DCTELEM)], ymm2
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vmovdqu YMMWORD [YMMBLOCK(6,0,r12,SIZEOF_DCTELEM)], ymm3
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vzeroupper
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uncollect_args 3
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pop rbp
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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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; r10 = JCOEFPTR coef_block
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; r11 = DCTELEM *divisors
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; r12 = 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 rbp
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mov rax, rsp
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mov rbp, rsp
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collect_args 3
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vmovdqu ymm4, [YMMBLOCK(0,0,r12,SIZEOF_DCTELEM)]
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vmovdqu ymm5, [YMMBLOCK(2,0,r12,SIZEOF_DCTELEM)]
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vmovdqu ymm6, [YMMBLOCK(4,0,r12,SIZEOF_DCTELEM)]
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vmovdqu ymm7, [YMMBLOCK(6,0,r12,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,r11)] ; correction + roundfactor
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vpaddw ymm1, YMMWORD [CORRECTION(2,0,r11)]
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vpaddw ymm2, YMMWORD [CORRECTION(4,0,r11)]
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vpaddw ymm3, YMMWORD [CORRECTION(6,0,r11)]
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vpmulhuw ymm0, YMMWORD [RECIPROCAL(0,0,r11)] ; reciprocal
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vpmulhuw ymm1, YMMWORD [RECIPROCAL(2,0,r11)]
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vpmulhuw ymm2, YMMWORD [RECIPROCAL(4,0,r11)]
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vpmulhuw ymm3, YMMWORD [RECIPROCAL(6,0,r11)]
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vpmulhuw ymm0, YMMWORD [SCALE(0,0,r11)] ; scale
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vpmulhuw ymm1, YMMWORD [SCALE(2,0,r11)]
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vpmulhuw ymm2, YMMWORD [SCALE(4,0,r11)]
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vpmulhuw ymm3, YMMWORD [SCALE(6,0,r11)]
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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,r10,SIZEOF_DCTELEM)], ymm0
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vmovdqu [YMMBLOCK(2,0,r10,SIZEOF_DCTELEM)], ymm1
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vmovdqu [YMMBLOCK(4,0,r10,SIZEOF_DCTELEM)], ymm2
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vmovdqu [YMMBLOCK(6,0,r10,SIZEOF_DCTELEM)], ymm3
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vzeroupper
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uncollect_args 3
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pop rbp
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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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