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| 1 ; |
| 2 ; jcqnts2f.asm - sample data conversion and quantization (SSE & 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_float_sse2 (JSAMPARRAY sample_data, JDIMENSION start_col, |
| 30 ; FAST_FLOAT * 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 ; FAST_FLOAT * workspace |
| 36 |
| 37 align 16 |
| 38 global EXTN(jsimd_convsamp_float_sse2) |
| 39 |
| 40 EXTN(jsimd_convsamp_float_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 pcmpeqw xmm7,xmm7 |
| 50 psllw xmm7,7 |
| 51 packsswb xmm7,xmm7 ; xmm7 = PB_CENTERJSAMPLE (0x808080..) |
| 52 |
| 53 mov esi, JSAMPARRAY [sample_data] ; (JSAMPROW *) |
| 54 mov eax, JDIMENSION [start_col] |
| 55 mov edi, POINTER [workspace] ; (DCTELEM *) |
| 56 mov ecx, DCTSIZE/2 |
| 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] |
| 63 movq xmm1, XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE] |
| 64 |
| 65 psubb xmm0,xmm7 ; xmm0=(01234567) |
| 66 psubb xmm1,xmm7 ; xmm1=(89ABCDEF) |
| 67 |
| 68 punpcklbw xmm0,xmm0 ; xmm0=(*0*1*2*3*4*5*6*7) |
| 69 punpcklbw xmm1,xmm1 ; xmm1=(*8*9*A*B*C*D*E*F) |
| 70 |
| 71 punpcklwd xmm2,xmm0 ; xmm2=(***0***1***2***3) |
| 72 punpckhwd xmm0,xmm0 ; xmm0=(***4***5***6***7) |
| 73 punpcklwd xmm3,xmm1 ; xmm3=(***8***9***A***B) |
| 74 punpckhwd xmm1,xmm1 ; xmm1=(***C***D***E***F) |
| 75 |
| 76 psrad xmm2,(DWORD_BIT-BYTE_BIT) ; xmm2=(0123) |
| 77 psrad xmm0,(DWORD_BIT-BYTE_BIT) ; xmm0=(4567) |
| 78 cvtdq2ps xmm2,xmm2 ; xmm2=(0123) |
| 79 cvtdq2ps xmm0,xmm0 ; xmm0=(4567) |
| 80 psrad xmm3,(DWORD_BIT-BYTE_BIT) ; xmm3=(89AB) |
| 81 psrad xmm1,(DWORD_BIT-BYTE_BIT) ; xmm1=(CDEF) |
| 82 cvtdq2ps xmm3,xmm3 ; xmm3=(89AB) |
| 83 cvtdq2ps xmm1,xmm1 ; xmm1=(CDEF) |
| 84 |
| 85 movaps XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_FAST_FLOAT)], xmm2 |
| 86 movaps XMMWORD [XMMBLOCK(0,1,edi,SIZEOF_FAST_FLOAT)], xmm0 |
| 87 movaps XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_FAST_FLOAT)], xmm3 |
| 88 movaps XMMWORD [XMMBLOCK(1,1,edi,SIZEOF_FAST_FLOAT)], xmm1 |
| 89 |
| 90 add esi, byte 2*SIZEOF_JSAMPROW |
| 91 add edi, byte 2*DCTSIZE*SIZEOF_FAST_FLOAT |
| 92 dec ecx |
| 93 jnz short .convloop |
| 94 |
| 95 pop edi |
| 96 pop esi |
| 97 ; pop edx ; need not be preserved |
| 98 ; pop ecx ; need not be preserved |
| 99 pop ebx |
| 100 pop ebp |
| 101 ret |
| 102 |
| 103 |
| 104 ; -------------------------------------------------------------------------- |
| 105 ; |
| 106 ; Quantize/descale the coefficients, and store into coef_block |
| 107 ; |
| 108 ; GLOBAL(void) |
| 109 ; jsimd_quantize_float_sse2 (JCOEFPTR coef_block, FAST_FLOAT * divisors, |
| 110 ; FAST_FLOAT * workspace); |
| 111 ; |
| 112 |
| 113 %define coef_block ebp+8 ; JCOEFPTR coef_block |
| 114 %define divisors ebp+12 ; FAST_FLOAT * divisors |
| 115 %define workspace ebp+16 ; FAST_FLOAT * workspace |
| 116 |
| 117 align 16 |
| 118 global EXTN(jsimd_quantize_float_sse2) |
| 119 |
| 120 EXTN(jsimd_quantize_float_sse2): |
| 121 push ebp |
| 122 mov ebp,esp |
| 123 ; push ebx ; unused |
| 124 ; push ecx ; unused |
| 125 ; push edx ; need not be preserved |
| 126 push esi |
| 127 push edi |
| 128 |
| 129 mov esi, POINTER [workspace] |
| 130 mov edx, POINTER [divisors] |
| 131 mov edi, JCOEFPTR [coef_block] |
| 132 mov eax, DCTSIZE2/16 |
| 133 alignx 16,7 |
| 134 .quantloop: |
| 135 movaps xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_FAST_FLOAT)] |
| 136 movaps xmm1, XMMWORD [XMMBLOCK(0,1,esi,SIZEOF_FAST_FLOAT)] |
| 137 mulps xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_FAST_FLOAT)] |
| 138 mulps xmm1, XMMWORD [XMMBLOCK(0,1,edx,SIZEOF_FAST_FLOAT)] |
| 139 movaps xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_FAST_FLOAT)] |
| 140 movaps xmm3, XMMWORD [XMMBLOCK(1,1,esi,SIZEOF_FAST_FLOAT)] |
| 141 mulps xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_FAST_FLOAT)] |
| 142 mulps xmm3, XMMWORD [XMMBLOCK(1,1,edx,SIZEOF_FAST_FLOAT)] |
| 143 |
| 144 cvtps2dq xmm0,xmm0 |
| 145 cvtps2dq xmm1,xmm1 |
| 146 cvtps2dq xmm2,xmm2 |
| 147 cvtps2dq xmm3,xmm3 |
| 148 |
| 149 packssdw xmm0,xmm1 |
| 150 packssdw xmm2,xmm3 |
| 151 |
| 152 movdqa XMMWORD [XMMBLOCK(0,0,edi,SIZEOF_JCOEF)], xmm0 |
| 153 movdqa XMMWORD [XMMBLOCK(1,0,edi,SIZEOF_JCOEF)], xmm2 |
| 154 |
| 155 add esi, byte 16*SIZEOF_FAST_FLOAT |
| 156 add edx, byte 16*SIZEOF_FAST_FLOAT |
| 157 add edi, byte 16*SIZEOF_JCOEF |
| 158 dec eax |
| 159 jnz short .quantloop |
| 160 |
| 161 pop edi |
| 162 pop esi |
| 163 ; pop edx ; need not be preserved |
| 164 ; pop ecx ; unused |
| 165 ; pop ebx ; unused |
| 166 pop ebp |
| 167 ret |
| 168 |
| 169 ; For some reason, the OS X linker does not honor the request to align the |
| 170 ; segment unless we do this. |
| 171 align 16 |
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Chromium Code Reviews
Issue 4134011:
Adds libjpeg-turbo to deps... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/