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media/libjpeg/simd/jiss2fst.asm@b8a032363ba2 (annotated)

media/libjpeg/simd/jiss2fst.asm

Thu, 22 Jan 2015 13:21:57 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Thu, 22 Jan 2015 13:21:57 +0100
branch
TOR_BUG_9701
changeset 15
b8a032363ba2
permissions
-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

michael@0 1 ;
michael@0 2 ; jiss2fst.asm - fast integer IDCT (SSE2)
michael@0 3 ;
michael@0 4 ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
michael@0 5 ;
michael@0 6 ; Based on
michael@0 7 ; x86 SIMD extension for IJG JPEG library
michael@0 8 ; Copyright (C) 1999-2006, MIYASAKA Masaru.
michael@0 9 ; For conditions of distribution and use, see copyright notice in jsimdext.inc
michael@0 10 ;
michael@0 11 ; This file should be assembled with NASM (Netwide Assembler),
michael@0 12 ; can *not* be assembled with Microsoft's MASM or any compatible
michael@0 13 ; assembler (including Borland's Turbo Assembler).
michael@0 14 ; NASM is available from http://nasm.sourceforge.net/ or
michael@0 15 ; http://sourceforge.net/project/showfiles.php?group_id=6208
michael@0 16 ;
michael@0 17 ; This file contains a fast, not so accurate integer implementation of
michael@0 18 ; the inverse DCT (Discrete Cosine Transform). The following code is
michael@0 19 ; based directly on the IJG's original jidctfst.c; see the jidctfst.c
michael@0 20 ; for more details.
michael@0 21 ;
michael@0 22 ; [TAB8]
michael@0 23
michael@0 24 %include "jsimdext.inc"
michael@0 25 %include "jdct.inc"
michael@0 26
michael@0 27 ; --------------------------------------------------------------------------
michael@0 28
michael@0 29 %define CONST_BITS 8 ; 14 is also OK.
michael@0 30 %define PASS1_BITS 2
michael@0 31
michael@0 32 %if IFAST_SCALE_BITS != PASS1_BITS
michael@0 33 %error "'IFAST_SCALE_BITS' must be equal to 'PASS1_BITS'."
michael@0 34 %endif
michael@0 35
michael@0 36 %if CONST_BITS == 8
michael@0 37 F_1_082 equ 277 ; FIX(1.082392200)
michael@0 38 F_1_414 equ 362 ; FIX(1.414213562)
michael@0 39 F_1_847 equ 473 ; FIX(1.847759065)
michael@0 40 F_2_613 equ 669 ; FIX(2.613125930)
michael@0 41 F_1_613 equ (F_2_613 - 256) ; FIX(2.613125930) - FIX(1)
michael@0 42 %else
michael@0 43 ; NASM cannot do compile-time arithmetic on floating-point constants.
michael@0 44 %define DESCALE(x,n) (((x)+(1<<((n)-1)))>>(n))
michael@0 45 F_1_082 equ DESCALE(1162209775,30-CONST_BITS) ; FIX(1.082392200)
michael@0 46 F_1_414 equ DESCALE(1518500249,30-CONST_BITS) ; FIX(1.414213562)
michael@0 47 F_1_847 equ DESCALE(1984016188,30-CONST_BITS) ; FIX(1.847759065)
michael@0 48 F_2_613 equ DESCALE(2805822602,30-CONST_BITS) ; FIX(2.613125930)
michael@0 49 F_1_613 equ (F_2_613 - (1 << CONST_BITS)) ; FIX(2.613125930) - FIX(1)
michael@0 50 %endif
michael@0 51
michael@0 52 ; --------------------------------------------------------------------------
michael@0 53 SECTION SEG_CONST
michael@0 54
michael@0 55 ; PRE_MULTIPLY_SCALE_BITS <= 2 (to avoid overflow)
michael@0 56 ; CONST_BITS + CONST_SHIFT + PRE_MULTIPLY_SCALE_BITS == 16 (for pmulhw)
michael@0 57
michael@0 58 %define PRE_MULTIPLY_SCALE_BITS 2
michael@0 59 %define CONST_SHIFT (16 - PRE_MULTIPLY_SCALE_BITS - CONST_BITS)
michael@0 60
michael@0 61 alignz 16
michael@0 62 global EXTN(jconst_idct_ifast_sse2)
michael@0 63
michael@0 64 EXTN(jconst_idct_ifast_sse2):
michael@0 65
michael@0 66 PW_F1414 times 8 dw F_1_414 << CONST_SHIFT
michael@0 67 PW_F1847 times 8 dw F_1_847 << CONST_SHIFT
michael@0 68 PW_MF1613 times 8 dw -F_1_613 << CONST_SHIFT
michael@0 69 PW_F1082 times 8 dw F_1_082 << CONST_SHIFT
michael@0 70 PB_CENTERJSAMP times 16 db CENTERJSAMPLE
michael@0 71
michael@0 72 alignz 16
michael@0 73
michael@0 74 ; --------------------------------------------------------------------------
michael@0 75 SECTION SEG_TEXT
michael@0 76 BITS 32
michael@0 77 ;
michael@0 78 ; Perform dequantization and inverse DCT on one block of coefficients.
michael@0 79 ;
michael@0 80 ; GLOBAL(void)
michael@0 81 ; jsimd_idct_ifast_sse2 (void * dct_table, JCOEFPTR coef_block,
michael@0 82 ; JSAMPARRAY output_buf, JDIMENSION output_col)
michael@0 83 ;
michael@0 84
michael@0 85 %define dct_table(b) (b)+8 ; jpeg_component_info * compptr
michael@0 86 %define coef_block(b) (b)+12 ; JCOEFPTR coef_block
michael@0 87 %define output_buf(b) (b)+16 ; JSAMPARRAY output_buf
michael@0 88 %define output_col(b) (b)+20 ; JDIMENSION output_col
michael@0 89
michael@0 90 %define original_ebp ebp+0
michael@0 91 %define wk(i) ebp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
michael@0 92 %define WK_NUM 2
michael@0 93
michael@0 94 align 16
michael@0 95 global EXTN(jsimd_idct_ifast_sse2)
michael@0 96
michael@0 97 EXTN(jsimd_idct_ifast_sse2):
michael@0 98 push ebp
michael@0 99 mov eax,esp ; eax = original ebp
michael@0 100 sub esp, byte 4
michael@0 101 and esp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
michael@0 102 mov [esp],eax
michael@0 103 mov ebp,esp ; ebp = aligned ebp
michael@0 104 lea esp, [wk(0)]
michael@0 105 pushpic ebx
michael@0 106 ; push ecx ; unused
michael@0 107 ; push edx ; need not be preserved
michael@0 108 push esi
michael@0 109 push edi
michael@0 110
michael@0 111 get_GOT ebx ; get GOT address
michael@0 112
michael@0 113 ; ---- Pass 1: process columns from input.
michael@0 114
michael@0 115 ; mov eax, [original_ebp]
michael@0 116 mov edx, POINTER [dct_table(eax)] ; quantptr
michael@0 117 mov esi, JCOEFPTR [coef_block(eax)] ; inptr
michael@0 118
michael@0 119 %ifndef NO_ZERO_COLUMN_TEST_IFAST_SSE2
michael@0 120 mov eax, DWORD [DWBLOCK(1,0,esi,SIZEOF_JCOEF)]
michael@0 121 or eax, DWORD [DWBLOCK(2,0,esi,SIZEOF_JCOEF)]
michael@0 122 jnz near .columnDCT
michael@0 123
michael@0 124 movdqa xmm0, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
michael@0 125 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
michael@0 126 por xmm0, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
michael@0 127 por xmm1, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
michael@0 128 por xmm0, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
michael@0 129 por xmm1, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
michael@0 130 por xmm0, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
michael@0 131 por xmm1,xmm0
michael@0 132 packsswb xmm1,xmm1
michael@0 133 packsswb xmm1,xmm1
michael@0 134 movd eax,xmm1
michael@0 135 test eax,eax
michael@0 136 jnz short .columnDCT
michael@0 137
michael@0 138 ; -- AC terms all zero
michael@0 139
michael@0 140 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
michael@0 141 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_ISLOW_MULT_TYPE)]
michael@0 142
michael@0 143 movdqa xmm7,xmm0 ; xmm0=in0=(00 01 02 03 04 05 06 07)
michael@0 144 punpcklwd xmm0,xmm0 ; xmm0=(00 00 01 01 02 02 03 03)
michael@0 145 punpckhwd xmm7,xmm7 ; xmm7=(04 04 05 05 06 06 07 07)
michael@0 146
michael@0 147 pshufd xmm6,xmm0,0x00 ; xmm6=col0=(00 00 00 00 00 00 00 00)
michael@0 148 pshufd xmm2,xmm0,0x55 ; xmm2=col1=(01 01 01 01 01 01 01 01)
michael@0 149 pshufd xmm5,xmm0,0xAA ; xmm5=col2=(02 02 02 02 02 02 02 02)
michael@0 150 pshufd xmm0,xmm0,0xFF ; xmm0=col3=(03 03 03 03 03 03 03 03)
michael@0 151 pshufd xmm1,xmm7,0x00 ; xmm1=col4=(04 04 04 04 04 04 04 04)
michael@0 152 pshufd xmm4,xmm7,0x55 ; xmm4=col5=(05 05 05 05 05 05 05 05)
michael@0 153 pshufd xmm3,xmm7,0xAA ; xmm3=col6=(06 06 06 06 06 06 06 06)
michael@0 154 pshufd xmm7,xmm7,0xFF ; xmm7=col7=(07 07 07 07 07 07 07 07)
michael@0 155
michael@0 156 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=col1
michael@0 157 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=col3
michael@0 158 jmp near .column_end
michael@0 159 alignx 16,7
michael@0 160 %endif
michael@0 161 .columnDCT:
michael@0 162
michael@0 163 ; -- Even part
michael@0 164
michael@0 165 movdqa xmm0, XMMWORD [XMMBLOCK(0,0,esi,SIZEOF_JCOEF)]
michael@0 166 movdqa xmm1, XMMWORD [XMMBLOCK(2,0,esi,SIZEOF_JCOEF)]
michael@0 167 pmullw xmm0, XMMWORD [XMMBLOCK(0,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 168 pmullw xmm1, XMMWORD [XMMBLOCK(2,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 169 movdqa xmm2, XMMWORD [XMMBLOCK(4,0,esi,SIZEOF_JCOEF)]
michael@0 170 movdqa xmm3, XMMWORD [XMMBLOCK(6,0,esi,SIZEOF_JCOEF)]
michael@0 171 pmullw xmm2, XMMWORD [XMMBLOCK(4,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 172 pmullw xmm3, XMMWORD [XMMBLOCK(6,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 173
michael@0 174 movdqa xmm4,xmm0
michael@0 175 movdqa xmm5,xmm1
michael@0 176 psubw xmm0,xmm2 ; xmm0=tmp11
michael@0 177 psubw xmm1,xmm3
michael@0 178 paddw xmm4,xmm2 ; xmm4=tmp10
michael@0 179 paddw xmm5,xmm3 ; xmm5=tmp13
michael@0 180
michael@0 181 psllw xmm1,PRE_MULTIPLY_SCALE_BITS
michael@0 182 pmulhw xmm1,[GOTOFF(ebx,PW_F1414)]
michael@0 183 psubw xmm1,xmm5 ; xmm1=tmp12
michael@0 184
michael@0 185 movdqa xmm6,xmm4
michael@0 186 movdqa xmm7,xmm0
michael@0 187 psubw xmm4,xmm5 ; xmm4=tmp3
michael@0 188 psubw xmm0,xmm1 ; xmm0=tmp2
michael@0 189 paddw xmm6,xmm5 ; xmm6=tmp0
michael@0 190 paddw xmm7,xmm1 ; xmm7=tmp1
michael@0 191
michael@0 192 movdqa XMMWORD [wk(1)], xmm4 ; wk(1)=tmp3
michael@0 193 movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=tmp2
michael@0 194
michael@0 195 ; -- Odd part
michael@0 196
michael@0 197 movdqa xmm2, XMMWORD [XMMBLOCK(1,0,esi,SIZEOF_JCOEF)]
michael@0 198 movdqa xmm3, XMMWORD [XMMBLOCK(3,0,esi,SIZEOF_JCOEF)]
michael@0 199 pmullw xmm2, XMMWORD [XMMBLOCK(1,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 200 pmullw xmm3, XMMWORD [XMMBLOCK(3,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 201 movdqa xmm5, XMMWORD [XMMBLOCK(5,0,esi,SIZEOF_JCOEF)]
michael@0 202 movdqa xmm1, XMMWORD [XMMBLOCK(7,0,esi,SIZEOF_JCOEF)]
michael@0 203 pmullw xmm5, XMMWORD [XMMBLOCK(5,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 204 pmullw xmm1, XMMWORD [XMMBLOCK(7,0,edx,SIZEOF_IFAST_MULT_TYPE)]
michael@0 205
michael@0 206 movdqa xmm4,xmm2
michael@0 207 movdqa xmm0,xmm5
michael@0 208 psubw xmm2,xmm1 ; xmm2=z12
michael@0 209 psubw xmm5,xmm3 ; xmm5=z10
michael@0 210 paddw xmm4,xmm1 ; xmm4=z11
michael@0 211 paddw xmm0,xmm3 ; xmm0=z13
michael@0 212
michael@0 213 movdqa xmm1,xmm5 ; xmm1=z10(unscaled)
michael@0 214 psllw xmm2,PRE_MULTIPLY_SCALE_BITS
michael@0 215 psllw xmm5,PRE_MULTIPLY_SCALE_BITS
michael@0 216
michael@0 217 movdqa xmm3,xmm4
michael@0 218 psubw xmm4,xmm0
michael@0 219 paddw xmm3,xmm0 ; xmm3=tmp7
michael@0 220
michael@0 221 psllw xmm4,PRE_MULTIPLY_SCALE_BITS
michael@0 222 pmulhw xmm4,[GOTOFF(ebx,PW_F1414)] ; xmm4=tmp11
michael@0 223
michael@0 224 ; To avoid overflow...
michael@0 225 ;
michael@0 226 ; (Original)
michael@0 227 ; tmp12 = -2.613125930 * z10 + z5;
michael@0 228 ;
michael@0 229 ; (This implementation)
michael@0 230 ; tmp12 = (-1.613125930 - 1) * z10 + z5;
michael@0 231 ; = -1.613125930 * z10 - z10 + z5;
michael@0 232
michael@0 233 movdqa xmm0,xmm5
michael@0 234 paddw xmm5,xmm2
michael@0 235 pmulhw xmm5,[GOTOFF(ebx,PW_F1847)] ; xmm5=z5
michael@0 236 pmulhw xmm0,[GOTOFF(ebx,PW_MF1613)]
michael@0 237 pmulhw xmm2,[GOTOFF(ebx,PW_F1082)]
michael@0 238 psubw xmm0,xmm1
michael@0 239 psubw xmm2,xmm5 ; xmm2=tmp10
michael@0 240 paddw xmm0,xmm5 ; xmm0=tmp12
michael@0 241
michael@0 242 ; -- Final output stage
michael@0 243
michael@0 244 psubw xmm0,xmm3 ; xmm0=tmp6
michael@0 245 movdqa xmm1,xmm6
michael@0 246 movdqa xmm5,xmm7
michael@0 247 paddw xmm6,xmm3 ; xmm6=data0=(00 01 02 03 04 05 06 07)
michael@0 248 paddw xmm7,xmm0 ; xmm7=data1=(10 11 12 13 14 15 16 17)
michael@0 249 psubw xmm1,xmm3 ; xmm1=data7=(70 71 72 73 74 75 76 77)
michael@0 250 psubw xmm5,xmm0 ; xmm5=data6=(60 61 62 63 64 65 66 67)
michael@0 251 psubw xmm4,xmm0 ; xmm4=tmp5
michael@0 252
michael@0 253 movdqa xmm3,xmm6 ; transpose coefficients(phase 1)
michael@0 254 punpcklwd xmm6,xmm7 ; xmm6=(00 10 01 11 02 12 03 13)
michael@0 255 punpckhwd xmm3,xmm7 ; xmm3=(04 14 05 15 06 16 07 17)
michael@0 256 movdqa xmm0,xmm5 ; transpose coefficients(phase 1)
michael@0 257 punpcklwd xmm5,xmm1 ; xmm5=(60 70 61 71 62 72 63 73)
michael@0 258 punpckhwd xmm0,xmm1 ; xmm0=(64 74 65 75 66 76 67 77)
michael@0 259
michael@0 260 movdqa xmm7, XMMWORD [wk(0)] ; xmm7=tmp2
michael@0 261 movdqa xmm1, XMMWORD [wk(1)] ; xmm1=tmp3
michael@0 262
michael@0 263 movdqa XMMWORD [wk(0)], xmm5 ; wk(0)=(60 70 61 71 62 72 63 73)
michael@0 264 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(64 74 65 75 66 76 67 77)
michael@0 265
michael@0 266 paddw xmm2,xmm4 ; xmm2=tmp4
michael@0 267 movdqa xmm5,xmm7
michael@0 268 movdqa xmm0,xmm1
michael@0 269 paddw xmm7,xmm4 ; xmm7=data2=(20 21 22 23 24 25 26 27)
michael@0 270 paddw xmm1,xmm2 ; xmm1=data4=(40 41 42 43 44 45 46 47)
michael@0 271 psubw xmm5,xmm4 ; xmm5=data5=(50 51 52 53 54 55 56 57)
michael@0 272 psubw xmm0,xmm2 ; xmm0=data3=(30 31 32 33 34 35 36 37)
michael@0 273
michael@0 274 movdqa xmm4,xmm7 ; transpose coefficients(phase 1)
michael@0 275 punpcklwd xmm7,xmm0 ; xmm7=(20 30 21 31 22 32 23 33)
michael@0 276 punpckhwd xmm4,xmm0 ; xmm4=(24 34 25 35 26 36 27 37)
michael@0 277 movdqa xmm2,xmm1 ; transpose coefficients(phase 1)
michael@0 278 punpcklwd xmm1,xmm5 ; xmm1=(40 50 41 51 42 52 43 53)
michael@0 279 punpckhwd xmm2,xmm5 ; xmm2=(44 54 45 55 46 56 47 57)
michael@0 280
michael@0 281 movdqa xmm0,xmm3 ; transpose coefficients(phase 2)
michael@0 282 punpckldq xmm3,xmm4 ; xmm3=(04 14 24 34 05 15 25 35)
michael@0 283 punpckhdq xmm0,xmm4 ; xmm0=(06 16 26 36 07 17 27 37)
michael@0 284 movdqa xmm5,xmm6 ; transpose coefficients(phase 2)
michael@0 285 punpckldq xmm6,xmm7 ; xmm6=(00 10 20 30 01 11 21 31)
michael@0 286 punpckhdq xmm5,xmm7 ; xmm5=(02 12 22 32 03 13 23 33)
michael@0 287
michael@0 288 movdqa xmm4, XMMWORD [wk(0)] ; xmm4=(60 70 61 71 62 72 63 73)
michael@0 289 movdqa xmm7, XMMWORD [wk(1)] ; xmm7=(64 74 65 75 66 76 67 77)
michael@0 290
michael@0 291 movdqa XMMWORD [wk(0)], xmm3 ; wk(0)=(04 14 24 34 05 15 25 35)
michael@0 292 movdqa XMMWORD [wk(1)], xmm0 ; wk(1)=(06 16 26 36 07 17 27 37)
michael@0 293
michael@0 294 movdqa xmm3,xmm1 ; transpose coefficients(phase 2)
michael@0 295 punpckldq xmm1,xmm4 ; xmm1=(40 50 60 70 41 51 61 71)
michael@0 296 punpckhdq xmm3,xmm4 ; xmm3=(42 52 62 72 43 53 63 73)
michael@0 297 movdqa xmm0,xmm2 ; transpose coefficients(phase 2)
michael@0 298 punpckldq xmm2,xmm7 ; xmm2=(44 54 64 74 45 55 65 75)
michael@0 299 punpckhdq xmm0,xmm7 ; xmm0=(46 56 66 76 47 57 67 77)
michael@0 300
michael@0 301 movdqa xmm4,xmm6 ; transpose coefficients(phase 3)
michael@0 302 punpcklqdq xmm6,xmm1 ; xmm6=col0=(00 10 20 30 40 50 60 70)
michael@0 303 punpckhqdq xmm4,xmm1 ; xmm4=col1=(01 11 21 31 41 51 61 71)
michael@0 304 movdqa xmm7,xmm5 ; transpose coefficients(phase 3)
michael@0 305 punpcklqdq xmm5,xmm3 ; xmm5=col2=(02 12 22 32 42 52 62 72)
michael@0 306 punpckhqdq xmm7,xmm3 ; xmm7=col3=(03 13 23 33 43 53 63 73)
michael@0 307
michael@0 308 movdqa xmm1, XMMWORD [wk(0)] ; xmm1=(04 14 24 34 05 15 25 35)
michael@0 309 movdqa xmm3, XMMWORD [wk(1)] ; xmm3=(06 16 26 36 07 17 27 37)
michael@0 310
michael@0 311 movdqa XMMWORD [wk(0)], xmm4 ; wk(0)=col1
michael@0 312 movdqa XMMWORD [wk(1)], xmm7 ; wk(1)=col3
michael@0 313
michael@0 314 movdqa xmm4,xmm1 ; transpose coefficients(phase 3)
michael@0 315 punpcklqdq xmm1,xmm2 ; xmm1=col4=(04 14 24 34 44 54 64 74)
michael@0 316 punpckhqdq xmm4,xmm2 ; xmm4=col5=(05 15 25 35 45 55 65 75)
michael@0 317 movdqa xmm7,xmm3 ; transpose coefficients(phase 3)
michael@0 318 punpcklqdq xmm3,xmm0 ; xmm3=col6=(06 16 26 36 46 56 66 76)
michael@0 319 punpckhqdq xmm7,xmm0 ; xmm7=col7=(07 17 27 37 47 57 67 77)
michael@0 320 .column_end:
michael@0 321
michael@0 322 ; -- Prefetch the next coefficient block
michael@0 323
michael@0 324 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 0*32]
michael@0 325 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 1*32]
michael@0 326 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 2*32]
michael@0 327 prefetchnta [esi + DCTSIZE2*SIZEOF_JCOEF + 3*32]
michael@0 328
michael@0 329 ; ---- Pass 2: process rows from work array, store into output array.
michael@0 330
michael@0 331 mov eax, [original_ebp]
michael@0 332 mov edi, JSAMPARRAY [output_buf(eax)] ; (JSAMPROW *)
michael@0 333 mov eax, JDIMENSION [output_col(eax)]
michael@0 334
michael@0 335 ; -- Even part
michael@0 336
michael@0 337 ; xmm6=col0, xmm5=col2, xmm1=col4, xmm3=col6
michael@0 338
michael@0 339 movdqa xmm2,xmm6
michael@0 340 movdqa xmm0,xmm5
michael@0 341 psubw xmm6,xmm1 ; xmm6=tmp11
michael@0 342 psubw xmm5,xmm3
michael@0 343 paddw xmm2,xmm1 ; xmm2=tmp10
michael@0 344 paddw xmm0,xmm3 ; xmm0=tmp13
michael@0 345
michael@0 346 psllw xmm5,PRE_MULTIPLY_SCALE_BITS
michael@0 347 pmulhw xmm5,[GOTOFF(ebx,PW_F1414)]
michael@0 348 psubw xmm5,xmm0 ; xmm5=tmp12
michael@0 349
michael@0 350 movdqa xmm1,xmm2
michael@0 351 movdqa xmm3,xmm6
michael@0 352 psubw xmm2,xmm0 ; xmm2=tmp3
michael@0 353 psubw xmm6,xmm5 ; xmm6=tmp2
michael@0 354 paddw xmm1,xmm0 ; xmm1=tmp0
michael@0 355 paddw xmm3,xmm5 ; xmm3=tmp1
michael@0 356
michael@0 357 movdqa xmm0, XMMWORD [wk(0)] ; xmm0=col1
michael@0 358 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=col3
michael@0 359
michael@0 360 movdqa XMMWORD [wk(0)], xmm2 ; wk(0)=tmp3
michael@0 361 movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=tmp2
michael@0 362
michael@0 363 ; -- Odd part
michael@0 364
michael@0 365 ; xmm0=col1, xmm5=col3, xmm4=col5, xmm7=col7
michael@0 366
michael@0 367 movdqa xmm2,xmm0
michael@0 368 movdqa xmm6,xmm4
michael@0 369 psubw xmm0,xmm7 ; xmm0=z12
michael@0 370 psubw xmm4,xmm5 ; xmm4=z10
michael@0 371 paddw xmm2,xmm7 ; xmm2=z11
michael@0 372 paddw xmm6,xmm5 ; xmm6=z13
michael@0 373
michael@0 374 movdqa xmm7,xmm4 ; xmm7=z10(unscaled)
michael@0 375 psllw xmm0,PRE_MULTIPLY_SCALE_BITS
michael@0 376 psllw xmm4,PRE_MULTIPLY_SCALE_BITS
michael@0 377
michael@0 378 movdqa xmm5,xmm2
michael@0 379 psubw xmm2,xmm6
michael@0 380 paddw xmm5,xmm6 ; xmm5=tmp7
michael@0 381
michael@0 382 psllw xmm2,PRE_MULTIPLY_SCALE_BITS
michael@0 383 pmulhw xmm2,[GOTOFF(ebx,PW_F1414)] ; xmm2=tmp11
michael@0 384
michael@0 385 ; To avoid overflow...
michael@0 386 ;
michael@0 387 ; (Original)
michael@0 388 ; tmp12 = -2.613125930 * z10 + z5;
michael@0 389 ;
michael@0 390 ; (This implementation)
michael@0 391 ; tmp12 = (-1.613125930 - 1) * z10 + z5;
michael@0 392 ; = -1.613125930 * z10 - z10 + z5;
michael@0 393
michael@0 394 movdqa xmm6,xmm4
michael@0 395 paddw xmm4,xmm0
michael@0 396 pmulhw xmm4,[GOTOFF(ebx,PW_F1847)] ; xmm4=z5
michael@0 397 pmulhw xmm6,[GOTOFF(ebx,PW_MF1613)]
michael@0 398 pmulhw xmm0,[GOTOFF(ebx,PW_F1082)]
michael@0 399 psubw xmm6,xmm7
michael@0 400 psubw xmm0,xmm4 ; xmm0=tmp10
michael@0 401 paddw xmm6,xmm4 ; xmm6=tmp12
michael@0 402
michael@0 403 ; -- Final output stage
michael@0 404
michael@0 405 psubw xmm6,xmm5 ; xmm6=tmp6
michael@0 406 movdqa xmm7,xmm1
michael@0 407 movdqa xmm4,xmm3
michael@0 408 paddw xmm1,xmm5 ; xmm1=data0=(00 10 20 30 40 50 60 70)
michael@0 409 paddw xmm3,xmm6 ; xmm3=data1=(01 11 21 31 41 51 61 71)
michael@0 410 psraw xmm1,(PASS1_BITS+3) ; descale
michael@0 411 psraw xmm3,(PASS1_BITS+3) ; descale
michael@0 412 psubw xmm7,xmm5 ; xmm7=data7=(07 17 27 37 47 57 67 77)
michael@0 413 psubw xmm4,xmm6 ; xmm4=data6=(06 16 26 36 46 56 66 76)
michael@0 414 psraw xmm7,(PASS1_BITS+3) ; descale
michael@0 415 psraw xmm4,(PASS1_BITS+3) ; descale
michael@0 416 psubw xmm2,xmm6 ; xmm2=tmp5
michael@0 417
michael@0 418 packsswb xmm1,xmm4 ; xmm1=(00 10 20 30 40 50 60 70 06 16 26 36 46 56 66 76)
michael@0 419 packsswb xmm3,xmm7 ; xmm3=(01 11 21 31 41 51 61 71 07 17 27 37 47 57 67 77)
michael@0 420
michael@0 421 movdqa xmm5, XMMWORD [wk(1)] ; xmm5=tmp2
michael@0 422 movdqa xmm6, XMMWORD [wk(0)] ; xmm6=tmp3
michael@0 423
michael@0 424 paddw xmm0,xmm2 ; xmm0=tmp4
michael@0 425 movdqa xmm4,xmm5
michael@0 426 movdqa xmm7,xmm6
michael@0 427 paddw xmm5,xmm2 ; xmm5=data2=(02 12 22 32 42 52 62 72)
michael@0 428 paddw xmm6,xmm0 ; xmm6=data4=(04 14 24 34 44 54 64 74)
michael@0 429 psraw xmm5,(PASS1_BITS+3) ; descale
michael@0 430 psraw xmm6,(PASS1_BITS+3) ; descale
michael@0 431 psubw xmm4,xmm2 ; xmm4=data5=(05 15 25 35 45 55 65 75)
michael@0 432 psubw xmm7,xmm0 ; xmm7=data3=(03 13 23 33 43 53 63 73)
michael@0 433 psraw xmm4,(PASS1_BITS+3) ; descale
michael@0 434 psraw xmm7,(PASS1_BITS+3) ; descale
michael@0 435
michael@0 436 movdqa xmm2,[GOTOFF(ebx,PB_CENTERJSAMP)] ; xmm2=[PB_CENTERJSAMP]
michael@0 437
michael@0 438 packsswb xmm5,xmm6 ; xmm5=(02 12 22 32 42 52 62 72 04 14 24 34 44 54 64 74)
michael@0 439 packsswb xmm7,xmm4 ; xmm7=(03 13 23 33 43 53 63 73 05 15 25 35 45 55 65 75)
michael@0 440
michael@0 441 paddb xmm1,xmm2
michael@0 442 paddb xmm3,xmm2
michael@0 443 paddb xmm5,xmm2
michael@0 444 paddb xmm7,xmm2
michael@0 445
michael@0 446 movdqa xmm0,xmm1 ; transpose coefficients(phase 1)
michael@0 447 punpcklbw xmm1,xmm3 ; xmm1=(00 01 10 11 20 21 30 31 40 41 50 51 60 61 70 71)
michael@0 448 punpckhbw xmm0,xmm3 ; xmm0=(06 07 16 17 26 27 36 37 46 47 56 57 66 67 76 77)
michael@0 449 movdqa xmm6,xmm5 ; transpose coefficients(phase 1)
michael@0 450 punpcklbw xmm5,xmm7 ; xmm5=(02 03 12 13 22 23 32 33 42 43 52 53 62 63 72 73)
michael@0 451 punpckhbw xmm6,xmm7 ; xmm6=(04 05 14 15 24 25 34 35 44 45 54 55 64 65 74 75)
michael@0 452
michael@0 453 movdqa xmm4,xmm1 ; transpose coefficients(phase 2)
michael@0 454 punpcklwd xmm1,xmm5 ; xmm1=(00 01 02 03 10 11 12 13 20 21 22 23 30 31 32 33)
michael@0 455 punpckhwd xmm4,xmm5 ; xmm4=(40 41 42 43 50 51 52 53 60 61 62 63 70 71 72 73)
michael@0 456 movdqa xmm2,xmm6 ; transpose coefficients(phase 2)
michael@0 457 punpcklwd xmm6,xmm0 ; xmm6=(04 05 06 07 14 15 16 17 24 25 26 27 34 35 36 37)
michael@0 458 punpckhwd xmm2,xmm0 ; xmm2=(44 45 46 47 54 55 56 57 64 65 66 67 74 75 76 77)
michael@0 459
michael@0 460 movdqa xmm3,xmm1 ; transpose coefficients(phase 3)
michael@0 461 punpckldq xmm1,xmm6 ; xmm1=(00 01 02 03 04 05 06 07 10 11 12 13 14 15 16 17)
michael@0 462 punpckhdq xmm3,xmm6 ; xmm3=(20 21 22 23 24 25 26 27 30 31 32 33 34 35 36 37)
michael@0 463 movdqa xmm7,xmm4 ; transpose coefficients(phase 3)
michael@0 464 punpckldq xmm4,xmm2 ; xmm4=(40 41 42 43 44 45 46 47 50 51 52 53 54 55 56 57)
michael@0 465 punpckhdq xmm7,xmm2 ; xmm7=(60 61 62 63 64 65 66 67 70 71 72 73 74 75 76 77)
michael@0 466
michael@0 467 pshufd xmm5,xmm1,0x4E ; xmm5=(10 11 12 13 14 15 16 17 00 01 02 03 04 05 06 07)
michael@0 468 pshufd xmm0,xmm3,0x4E ; xmm0=(30 31 32 33 34 35 36 37 20 21 22 23 24 25 26 27)
michael@0 469 pshufd xmm6,xmm4,0x4E ; xmm6=(50 51 52 53 54 55 56 57 40 41 42 43 44 45 46 47)
michael@0 470 pshufd xmm2,xmm7,0x4E ; xmm2=(70 71 72 73 74 75 76 77 60 61 62 63 64 65 66 67)
michael@0 471
michael@0 472 mov edx, JSAMPROW [edi+0*SIZEOF_JSAMPROW]
michael@0 473 mov esi, JSAMPROW [edi+2*SIZEOF_JSAMPROW]
michael@0 474 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm1
michael@0 475 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm3
michael@0 476 mov edx, JSAMPROW [edi+4*SIZEOF_JSAMPROW]
michael@0 477 mov esi, JSAMPROW [edi+6*SIZEOF_JSAMPROW]
michael@0 478 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm4
michael@0 479 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm7
michael@0 480
michael@0 481 mov edx, JSAMPROW [edi+1*SIZEOF_JSAMPROW]
michael@0 482 mov esi, JSAMPROW [edi+3*SIZEOF_JSAMPROW]
michael@0 483 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm5
michael@0 484 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm0
michael@0 485 mov edx, JSAMPROW [edi+5*SIZEOF_JSAMPROW]
michael@0 486 mov esi, JSAMPROW [edi+7*SIZEOF_JSAMPROW]
michael@0 487 movq XMM_MMWORD [edx+eax*SIZEOF_JSAMPLE], xmm6
michael@0 488 movq XMM_MMWORD [esi+eax*SIZEOF_JSAMPLE], xmm2
michael@0 489
michael@0 490 pop edi
michael@0 491 pop esi
michael@0 492 ; pop edx ; need not be preserved
michael@0 493 ; pop ecx ; unused
michael@0 494 poppic ebx
michael@0 495 mov esp,ebp ; esp <- aligned ebp
michael@0 496 pop esp ; esp <- original ebp
michael@0 497 pop ebp
michael@0 498 ret
michael@0 499
michael@0 500 ; For some reason, the OS X linker does not honor the request to align the
michael@0 501 ; segment unless we do this.
michael@0 502 align 16

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