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| 1 ; | |
| 2 ; jcqnts2i.asm - sample data conversion and quantization (SSE2) | |
| 3 ; | |
| 4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB | |
| 5 ; | |
| 6 ; Based on | |
| 7 ; x86 SIMD extension for IJG JPEG library | |
| 8 ; Copyright (C) 1999-2006, MIYASAKA Masaru. | |
| 9 ; For conditions of distribution and use, see copyright notice in jsimdext.inc | |
| 10 ; | |
| 11 ; This file should be assembled with NASM (Netwide Assembler), | |
| 12 ; can *not* be assembled with Microsoft's MASM or any compatible | |
| 13 ; assembler (including Borland's Turbo Assembler). | |
| 14 ; NASM is available from http://nasm.sourceforge.net/ or | |
| 15 ; http://sourceforge.net/project/showfiles.php?group_id=6208 | |
| 16 ; | |
| 17 ; [TAB8] | |
| 18 | |
| 19 %include "jsimdext.inc" | |
| 20 %include "jdct.inc" | |
| 21 | |
| 22 ; -------------------------------------------------------------------------- | |
| 23 SECTION SEG_TEXT | |
| 24 BITS 32 | |
| 25 ; | |
| 26 ; Load data into workspace, applying unsigned->signed conversion | |
| 27 ; | |
| 28 ; GLOBAL(void) | |
| 29 ; jsimd_convsamp_sse2 (JSAMPARRAY sample_data, JDIMENSION start_col, | |
| 30 ; DCTELEM * workspace); | |
| 31 ; | |
| 32 | |
| 33 %define sample_data ebp+8 ; JSAMPARRAY sample_data | |
| 34 %define start_col ebp+12 ; JDIMENSION start_col | |
| 35 %define workspace ebp+16 ; DCTELEM * workspace | |
| 36 | |
| 37 align 16 | |
| 38 global EXTN(jsimd_convsamp_sse2) PRIVATE | |
| 39 | |
| 40 EXTN(jsimd_convsamp_sse2): | |
| 41 push ebp | |
| 42 mov ebp,esp | |
| 43 push ebx | |
| 44 ; push ecx ; need not be preserved | |
| 45 ; push edx ; need not be preserved | |
| 46 push esi | |
| 47 push edi | |
| 48 | |
| 49 pxor xmm6,xmm6 ; xmm6=(all 0's) | |
| 50 pcmpeqw xmm7,xmm7 | |
| 51 psllw xmm7,7 ; xmm7={0xFF80 0xFF80 0xFF80 0xFF80 ..} | |
| 52 | |
| 53 mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *) | |
| 54 mov eax, JDIMENSION [start_col] | |
| 55 mov edi, POINTER [workspace] ; (DCTELEM *) | |
| 56 mov ecx, DCTSIZE/4 | |
| 57 alignx 16,7 | |
| 58 .convloop: | |
| 59 mov ebx, JSAMPROW [esi+0*SIZEOF_JSAMPROW] ; (JSAMPLE *) | |
| 60 mov edx, JSAMPROW [esi+1*SIZEOF_JSAMPROW] ; (JSAMPLE *) | |
| 61 | |
| 62 movq xmm0, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] ; xmm0=(01234567
) | |
| 63 movq xmm1, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] ; xmm1=(89ABCDEF
) | |
| 64 | |
| 65 mov ebx, JSAMPROW [esi+2*SIZEOF_JSAMPROW] ; (JSAMPLE *) | |
| 66 mov edx, JSAMPROW [esi+3*SIZEOF_JSAMPROW] ; (JSAMPLE *) | |
| 67 | |
| 68 movq xmm2, XMM_MMWORD [ebx+eax*SIZEOF_JSAMPLE] ; xmm2=(GHIJKLMN
) | |
| 69 movq xmm3, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] ; xmm3=(OPQRSTUV
) | |
| 70 | |
| 71 punpcklbw xmm0,xmm6 ; xmm0=(01234567) | |
| 72 punpcklbw xmm1,xmm6 ; xmm1=(89ABCDEF) | |
| 73 paddw xmm0,xmm7 | |
| 74 paddw xmm1,xmm7 | |
| 75 punpcklbw xmm2,xmm6 ; xmm2=(GHIJKLMN) | |
| 76 punpcklbw xmm3,xmm6 ; xmm3=(OPQRSTUV) | |
| 77 paddw xmm2,xmm7 | |
| 78 paddw xmm3,xmm7 | |
| 79 | |
| 80 movdqa XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_DCTELEM)], xmm0 | |
| 81 movdqa XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_DCTELEM)], xmm1 | |
| 82 movdqa XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], xmm2 | |
| 83 movdqa XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_DCTELEM)], xmm3 | |
| 84 | |
| 85 add esi, byte 4*SIZEOF_JSAMPROW | |
| 86 add edi, byte 4*DCTSIZE*SIZEOF_DCTELEM | |
| 87 dec ecx | |
| 88 jnz short .convloop | |
| 89 | |
| 90 pop edi | |
| 91 pop esi | |
| 92 ; pop edx ; need not be preserved | |
| 93 ; pop ecx ; need not be preserved | |
| 94 pop ebx | |
| 95 pop ebp | |
| 96 ret | |
| 97 | |
| 98 ; -------------------------------------------------------------------------- | |
| 99 ; | |
| 100 ; Quantize/descale the coefficients, and store into coef_block | |
| 101 ; | |
| 102 ; This implementation is based on an algorithm described in | |
| 103 ; "How to optimize for the Pentium family of microprocessors" | |
| 104 ; (http://www.agner.org/assem/). | |
| 105 ; | |
| 106 ; GLOBAL(void) | |
| 107 ; jsimd_quantize_sse2 (JCOEFPTR coef_block, DCTELEM * divisors, | |
| 108 ; DCTELEM * workspace); | |
| 109 ; | |
| 110 | |
| 111 %define RECIPROCAL(m,n,b) XMMBLOCK(DCTSIZE*0+(m),(n),(b),SIZEOF_DCTELEM) | |
| 112 %define CORRECTION(m,n,b) XMMBLOCK(DCTSIZE*1+(m),(n),(b),SIZEOF_DCTELEM) | |
| 113 %define SCALE(m,n,b) XMMBLOCK(DCTSIZE*2+(m),(n),(b),SIZEOF_DCTELEM) | |
| 114 | |
| 115 %define coef_block ebp+8 ; JCOEFPTR coef_block | |
| 116 %define divisors ebp+12 ; DCTELEM * divisors | |
| 117 %define workspace ebp+16 ; DCTELEM * workspace | |
| 118 | |
| 119 align 16 | |
| 120 global EXTN(jsimd_quantize_sse2) PRIVATE | |
| 121 | |
| 122 EXTN(jsimd_quantize_sse2): | |
| 123 push ebp | |
| 124 mov ebp,esp | |
| 125 ; push ebx ; unused | |
| 126 ; push ecx ; unused | |
| 127 ; push edx ; need not be preserved | |
| 128 push esi | |
| 129 push edi | |
| 130 | |
| 131 mov esi, POINTER [workspace] | |
| 132 mov edx, POINTER [divisors] | |
| 133 mov edi, JCOEFPTR [coef_block] | |
| 134 mov eax, DCTSIZE2/32 | |
| 135 alignx 16,7 | |
| 136 .quantloop: | |
| 137 movdqa xmm4, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_DCTELEM)] | |
| 138 movdqa xmm5, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_DCTELEM)] | |
| 139 movdqa xmm6, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_DCTELEM)] | |
| 140 movdqa xmm7, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_DCTELEM)] | |
| 141 movdqa xmm0,xmm4 | |
| 142 movdqa xmm1,xmm5 | |
| 143 movdqa xmm2,xmm6 | |
| 144 movdqa xmm3,xmm7 | |
| 145 psraw xmm4,(WORD_BIT-1) | |
| 146 psraw xmm5,(WORD_BIT-1) | |
| 147 psraw xmm6,(WORD_BIT-1) | |
| 148 psraw xmm7,(WORD_BIT-1) | |
| 149 pxor xmm0,xmm4 | |
| 150 pxor xmm1,xmm5 | |
| 151 pxor xmm2,xmm6 | |
| 152 pxor xmm3,xmm7 | |
| 153 psubw xmm0,xmm4 ; if (xmm0 < 0) xmm0 = -xmm0; | |
| 154 psubw xmm1,xmm5 ; if (xmm1 < 0) xmm1 = -xmm1; | |
| 155 psubw xmm2,xmm6 ; if (xmm2 < 0) xmm2 = -xmm2; | |
| 156 psubw xmm3,xmm7 ; if (xmm3 < 0) xmm3 = -xmm3; | |
| 157 | |
| 158 paddw xmm0, XMMWORD [CORRECTION(0,0,edx)] ; correction + roundfactor | |
| 159 paddw xmm1, XMMWORD [CORRECTION(1,0,edx)] | |
| 160 paddw xmm2, XMMWORD [CORRECTION(2,0,edx)] | |
| 161 paddw xmm3, XMMWORD [CORRECTION(3,0,edx)] | |
| 162 pmulhuw xmm0, XMMWORD [RECIPROCAL(0,0,edx)] ; reciprocal | |
| 163 pmulhuw xmm1, XMMWORD [RECIPROCAL(1,0,edx)] | |
| 164 pmulhuw xmm2, XMMWORD [RECIPROCAL(2,0,edx)] | |
| 165 pmulhuw xmm3, XMMWORD [RECIPROCAL(3,0,edx)] | |
| 166 pmulhuw xmm0, XMMWORD [SCALE(0,0,edx)] ; scale | |
| 167 pmulhuw xmm1, XMMWORD [SCALE(1,0,edx)] | |
| 168 pmulhuw xmm2, XMMWORD [SCALE(2,0,edx)] | |
| 169 pmulhuw xmm3, XMMWORD [SCALE(3,0,edx)] | |
| 170 | |
| 171 pxor xmm0,xmm4 | |
| 172 pxor xmm1,xmm5 | |
| 173 pxor xmm2,xmm6 | |
| 174 pxor xmm3,xmm7 | |
| 175 psubw xmm0,xmm4 | |
| 176 psubw xmm1,xmm5 | |
| 177 psubw xmm2,xmm6 | |
| 178 psubw xmm3,xmm7 | |
| 179 movdqa XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_DCTELEM)], xmm0 | |
| 180 movdqa XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_DCTELEM)], xmm1 | |
| 181 movdqa XMMWORD [XMMBLOCK(2,0,edi,SIZEOF_DCTELEM)], xmm2 | |
| 182 movdqa XMMWORD [XMMBLOCK(3,0,edi,SIZEOF_DCTELEM)], xmm3 | |
| 183 | |
| 184 add esi, byte 32*SIZEOF_DCTELEM | |
| 185 add edx, byte 32*SIZEOF_DCTELEM | |
| 186 add edi, byte 32*SIZEOF_JCOEF | |
| 187 dec eax | |
| 188 jnz near .quantloop | |
| 189 | |
| 190 pop edi | |
| 191 pop esi | |
| 192 ; pop edx ; need not be preserved | |
| 193 ; pop ecx ; unused | |
| 194 ; pop ebx ; unused | |
| 195 pop ebp | |
| 196 ret | |
| 197 | |
| 198 ; For some reason, the OS X linker does not honor the request to align the | |
| 199 ; segment unless we do this. | |
| 200 align 16 | |
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Chromium Code Reviews
Issue 1953443002:
Update to libjpeg_turbo 1.4.90 (Closed)
Base URL: https://chromium.googlesource.com/chromium/deps/libjpeg_turbo.git@master