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media/libjpeg/simd/jcgryss2-64.asm@6474c204b198 (annotated)

media/libjpeg/simd/jcgryss2-64.asm

Wed, 31 Dec 2014 06:09:35 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 06:09:35 +0100
changeset 0
6474c204b198
permissions
-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

michael@0 1 ;
michael@0 2 ; jcgryss2-64.asm - grayscale colorspace conversion (64-bit SSE2)
michael@0 3 ;
michael@0 4 ; x86 SIMD extension for IJG JPEG library
michael@0 5 ; Copyright (C) 1999-2006, MIYASAKA Masaru.
michael@0 6 ; Copyright (C) 2011, D. R. Commander.
michael@0 7 ; For conditions of distribution and use, see copyright notice in jsimdext.inc
michael@0 8 ;
michael@0 9 ; This file should be assembled with NASM (Netwide Assembler),
michael@0 10 ; can *not* be assembled with Microsoft's MASM or any compatible
michael@0 11 ; assembler (including Borland's Turbo Assembler).
michael@0 12 ; NASM is available from http://nasm.sourceforge.net/ or
michael@0 13 ; http://sourceforge.net/project/showfiles.php?group_id=6208
michael@0 14 ;
michael@0 15 ; [TAB8]
michael@0 16
michael@0 17 %include "jcolsamp.inc"
michael@0 18
michael@0 19 ; --------------------------------------------------------------------------
michael@0 20 ;
michael@0 21 ; Convert some rows of samples to the output colorspace.
michael@0 22 ;
michael@0 23 ; GLOBAL(void)
michael@0 24 ; jsimd_rgb_gray_convert_sse2 (JDIMENSION img_width,
michael@0 25 ; JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
michael@0 26 ; JDIMENSION output_row, int num_rows);
michael@0 27 ;
michael@0 28
michael@0 29 ; r10 = JDIMENSION img_width
michael@0 30 ; r11 = JSAMPARRAY input_buf
michael@0 31 ; r12 = JSAMPIMAGE output_buf
michael@0 32 ; r13 = JDIMENSION output_row
michael@0 33 ; r14 = int num_rows
michael@0 34
michael@0 35 %define wk(i) rbp-(WK_NUM-(i))*SIZEOF_XMMWORD ; xmmword wk[WK_NUM]
michael@0 36 %define WK_NUM 2
michael@0 37
michael@0 38 align 16
michael@0 39
michael@0 40 global EXTN(jsimd_rgb_gray_convert_sse2)
michael@0 41
michael@0 42 EXTN(jsimd_rgb_gray_convert_sse2):
michael@0 43 push rbp
michael@0 44 mov rax,rsp ; rax = original rbp
michael@0 45 sub rsp, byte 4
michael@0 46 and rsp, byte (-SIZEOF_XMMWORD) ; align to 128 bits
michael@0 47 mov [rsp],rax
michael@0 48 mov rbp,rsp ; rbp = aligned rbp
michael@0 49 lea rsp, [wk(0)]
michael@0 50 collect_args
michael@0 51 push rbx
michael@0 52
michael@0 53 mov rcx, r10
michael@0 54 test rcx,rcx
michael@0 55 jz near .return
michael@0 56
michael@0 57 push rcx
michael@0 58
michael@0 59 mov rsi, r12
michael@0 60 mov rcx, r13
michael@0 61 mov rdi, JSAMPARRAY [rsi+0*SIZEOF_JSAMPARRAY]
michael@0 62 lea rdi, [rdi+rcx*SIZEOF_JSAMPROW]
michael@0 63
michael@0 64 pop rcx
michael@0 65
michael@0 66 mov rsi, r11
michael@0 67 mov eax, r14d
michael@0 68 test rax,rax
michael@0 69 jle near .return
michael@0 70 .rowloop:
michael@0 71 push rdi
michael@0 72 push rsi
michael@0 73 push rcx ; col
michael@0 74
michael@0 75 mov rsi, JSAMPROW [rsi] ; inptr
michael@0 76 mov rdi, JSAMPROW [rdi] ; outptr0
michael@0 77
michael@0 78 cmp rcx, byte SIZEOF_XMMWORD
michael@0 79 jae near .columnloop
michael@0 80
michael@0 81 %if RGB_PIXELSIZE == 3 ; ---------------
michael@0 82
michael@0 83 .column_ld1:
michael@0 84 push rax
michael@0 85 push rdx
michael@0 86 lea rcx,[rcx+rcx*2] ; imul ecx,RGB_PIXELSIZE
michael@0 87 test cl, SIZEOF_BYTE
michael@0 88 jz short .column_ld2
michael@0 89 sub rcx, byte SIZEOF_BYTE
michael@0 90 movzx rax, BYTE [rsi+rcx]
michael@0 91 .column_ld2:
michael@0 92 test cl, SIZEOF_WORD
michael@0 93 jz short .column_ld4
michael@0 94 sub rcx, byte SIZEOF_WORD
michael@0 95 movzx rdx, WORD [rsi+rcx]
michael@0 96 shl rax, WORD_BIT
michael@0 97 or rax,rdx
michael@0 98 .column_ld4:
michael@0 99 movd xmmA,eax
michael@0 100 pop rdx
michael@0 101 pop rax
michael@0 102 test cl, SIZEOF_DWORD
michael@0 103 jz short .column_ld8
michael@0 104 sub rcx, byte SIZEOF_DWORD
michael@0 105 movd xmmF, XMM_DWORD [rsi+rcx]
michael@0 106 pslldq xmmA, SIZEOF_DWORD
michael@0 107 por xmmA,xmmF
michael@0 108 .column_ld8:
michael@0 109 test cl, SIZEOF_MMWORD
michael@0 110 jz short .column_ld16
michael@0 111 sub rcx, byte SIZEOF_MMWORD
michael@0 112 movq xmmB, XMM_MMWORD [rsi+rcx]
michael@0 113 pslldq xmmA, SIZEOF_MMWORD
michael@0 114 por xmmA,xmmB
michael@0 115 .column_ld16:
michael@0 116 test cl, SIZEOF_XMMWORD
michael@0 117 jz short .column_ld32
michael@0 118 movdqa xmmF,xmmA
michael@0 119 movdqu xmmA, XMMWORD [rsi+0*SIZEOF_XMMWORD]
michael@0 120 mov rcx, SIZEOF_XMMWORD
michael@0 121 jmp short .rgb_gray_cnv
michael@0 122 .column_ld32:
michael@0 123 test cl, 2*SIZEOF_XMMWORD
michael@0 124 mov rcx, SIZEOF_XMMWORD
michael@0 125 jz short .rgb_gray_cnv
michael@0 126 movdqa xmmB,xmmA
michael@0 127 movdqu xmmA, XMMWORD [rsi+0*SIZEOF_XMMWORD]
michael@0 128 movdqu xmmF, XMMWORD [rsi+1*SIZEOF_XMMWORD]
michael@0 129 jmp short .rgb_gray_cnv
michael@0 130
michael@0 131 .columnloop:
michael@0 132 movdqu xmmA, XMMWORD [rsi+0*SIZEOF_XMMWORD]
michael@0 133 movdqu xmmF, XMMWORD [rsi+1*SIZEOF_XMMWORD]
michael@0 134 movdqu xmmB, XMMWORD [rsi+2*SIZEOF_XMMWORD]
michael@0 135
michael@0 136 .rgb_gray_cnv:
michael@0 137 ; xmmA=(00 10 20 01 11 21 02 12 22 03 13 23 04 14 24 05)
michael@0 138 ; xmmF=(15 25 06 16 26 07 17 27 08 18 28 09 19 29 0A 1A)
michael@0 139 ; xmmB=(2A 0B 1B 2B 0C 1C 2C 0D 1D 2D 0E 1E 2E 0F 1F 2F)
michael@0 140
michael@0 141 movdqa xmmG,xmmA
michael@0 142 pslldq xmmA,8 ; xmmA=(-- -- -- -- -- -- -- -- 00 10 20 01 11 21 02 12)
michael@0 143 psrldq xmmG,8 ; xmmG=(22 03 13 23 04 14 24 05 -- -- -- -- -- -- -- --)
michael@0 144
michael@0 145 punpckhbw xmmA,xmmF ; xmmA=(00 08 10 18 20 28 01 09 11 19 21 29 02 0A 12 1A)
michael@0 146 pslldq xmmF,8 ; xmmF=(-- -- -- -- -- -- -- -- 15 25 06 16 26 07 17 27)
michael@0 147
michael@0 148 punpcklbw xmmG,xmmB ; xmmG=(22 2A 03 0B 13 1B 23 2B 04 0C 14 1C 24 2C 05 0D)
michael@0 149 punpckhbw xmmF,xmmB ; xmmF=(15 1D 25 2D 06 0E 16 1E 26 2E 07 0F 17 1F 27 2F)
michael@0 150
michael@0 151 movdqa xmmD,xmmA
michael@0 152 pslldq xmmA,8 ; xmmA=(-- -- -- -- -- -- -- -- 00 08 10 18 20 28 01 09)
michael@0 153 psrldq xmmD,8 ; xmmD=(11 19 21 29 02 0A 12 1A -- -- -- -- -- -- -- --)
michael@0 154
michael@0 155 punpckhbw xmmA,xmmG ; xmmA=(00 04 08 0C 10 14 18 1C 20 24 28 2C 01 05 09 0D)
michael@0 156 pslldq xmmG,8 ; xmmG=(-- -- -- -- -- -- -- -- 22 2A 03 0B 13 1B 23 2B)
michael@0 157
michael@0 158 punpcklbw xmmD,xmmF ; xmmD=(11 15 19 1D 21 25 29 2D 02 06 0A 0E 12 16 1A 1E)
michael@0 159 punpckhbw xmmG,xmmF ; xmmG=(22 26 2A 2E 03 07 0B 0F 13 17 1B 1F 23 27 2B 2F)
michael@0 160
michael@0 161 movdqa xmmE,xmmA
michael@0 162 pslldq xmmA,8 ; xmmA=(-- -- -- -- -- -- -- -- 00 04 08 0C 10 14 18 1C)
michael@0 163 psrldq xmmE,8 ; xmmE=(20 24 28 2C 01 05 09 0D -- -- -- -- -- -- -- --)
michael@0 164
michael@0 165 punpckhbw xmmA,xmmD ; xmmA=(00 02 04 06 08 0A 0C 0E 10 12 14 16 18 1A 1C 1E)
michael@0 166 pslldq xmmD,8 ; xmmD=(-- -- -- -- -- -- -- -- 11 15 19 1D 21 25 29 2D)
michael@0 167
michael@0 168 punpcklbw xmmE,xmmG ; xmmE=(20 22 24 26 28 2A 2C 2E 01 03 05 07 09 0B 0D 0F)
michael@0 169 punpckhbw xmmD,xmmG ; xmmD=(11 13 15 17 19 1B 1D 1F 21 23 25 27 29 2B 2D 2F)
michael@0 170
michael@0 171 pxor xmmH,xmmH
michael@0 172
michael@0 173 movdqa xmmC,xmmA
michael@0 174 punpcklbw xmmA,xmmH ; xmmA=(00 02 04 06 08 0A 0C 0E)
michael@0 175 punpckhbw xmmC,xmmH ; xmmC=(10 12 14 16 18 1A 1C 1E)
michael@0 176
michael@0 177 movdqa xmmB,xmmE
michael@0 178 punpcklbw xmmE,xmmH ; xmmE=(20 22 24 26 28 2A 2C 2E)
michael@0 179 punpckhbw xmmB,xmmH ; xmmB=(01 03 05 07 09 0B 0D 0F)
michael@0 180
michael@0 181 movdqa xmmF,xmmD
michael@0 182 punpcklbw xmmD,xmmH ; xmmD=(11 13 15 17 19 1B 1D 1F)
michael@0 183 punpckhbw xmmF,xmmH ; xmmF=(21 23 25 27 29 2B 2D 2F)
michael@0 184
michael@0 185 %else ; RGB_PIXELSIZE == 4 ; -----------
michael@0 186
michael@0 187 .column_ld1:
michael@0 188 test cl, SIZEOF_XMMWORD/16
michael@0 189 jz short .column_ld2
michael@0 190 sub rcx, byte SIZEOF_XMMWORD/16
michael@0 191 movd xmmA, XMM_DWORD [rsi+rcx*RGB_PIXELSIZE]
michael@0 192 .column_ld2:
michael@0 193 test cl, SIZEOF_XMMWORD/8
michael@0 194 jz short .column_ld4
michael@0 195 sub rcx, byte SIZEOF_XMMWORD/8
michael@0 196 movq xmmE, XMM_MMWORD [rsi+rcx*RGB_PIXELSIZE]
michael@0 197 pslldq xmmA, SIZEOF_MMWORD
michael@0 198 por xmmA,xmmE
michael@0 199 .column_ld4:
michael@0 200 test cl, SIZEOF_XMMWORD/4
michael@0 201 jz short .column_ld8
michael@0 202 sub rcx, byte SIZEOF_XMMWORD/4
michael@0 203 movdqa xmmE,xmmA
michael@0 204 movdqu xmmA, XMMWORD [rsi+rcx*RGB_PIXELSIZE]
michael@0 205 .column_ld8:
michael@0 206 test cl, SIZEOF_XMMWORD/2
michael@0 207 mov rcx, SIZEOF_XMMWORD
michael@0 208 jz short .rgb_gray_cnv
michael@0 209 movdqa xmmF,xmmA
michael@0 210 movdqa xmmH,xmmE
michael@0 211 movdqu xmmA, XMMWORD [rsi+0*SIZEOF_XMMWORD]
michael@0 212 movdqu xmmE, XMMWORD [rsi+1*SIZEOF_XMMWORD]
michael@0 213 jmp short .rgb_gray_cnv
michael@0 214
michael@0 215 .columnloop:
michael@0 216 movdqu xmmA, XMMWORD [rsi+0*SIZEOF_XMMWORD]
michael@0 217 movdqu xmmE, XMMWORD [rsi+1*SIZEOF_XMMWORD]
michael@0 218 movdqu xmmF, XMMWORD [rsi+2*SIZEOF_XMMWORD]
michael@0 219 movdqu xmmH, XMMWORD [rsi+3*SIZEOF_XMMWORD]
michael@0 220
michael@0 221 .rgb_gray_cnv:
michael@0 222 ; xmmA=(00 10 20 30 01 11 21 31 02 12 22 32 03 13 23 33)
michael@0 223 ; xmmE=(04 14 24 34 05 15 25 35 06 16 26 36 07 17 27 37)
michael@0 224 ; xmmF=(08 18 28 38 09 19 29 39 0A 1A 2A 3A 0B 1B 2B 3B)
michael@0 225 ; xmmH=(0C 1C 2C 3C 0D 1D 2D 3D 0E 1E 2E 3E 0F 1F 2F 3F)
michael@0 226
michael@0 227 movdqa xmmD,xmmA
michael@0 228 punpcklbw xmmA,xmmE ; xmmA=(00 04 10 14 20 24 30 34 01 05 11 15 21 25 31 35)
michael@0 229 punpckhbw xmmD,xmmE ; xmmD=(02 06 12 16 22 26 32 36 03 07 13 17 23 27 33 37)
michael@0 230
michael@0 231 movdqa xmmC,xmmF
michael@0 232 punpcklbw xmmF,xmmH ; xmmF=(08 0C 18 1C 28 2C 38 3C 09 0D 19 1D 29 2D 39 3D)
michael@0 233 punpckhbw xmmC,xmmH ; xmmC=(0A 0E 1A 1E 2A 2E 3A 3E 0B 0F 1B 1F 2B 2F 3B 3F)
michael@0 234
michael@0 235 movdqa xmmB,xmmA
michael@0 236 punpcklwd xmmA,xmmF ; xmmA=(00 04 08 0C 10 14 18 1C 20 24 28 2C 30 34 38 3C)
michael@0 237 punpckhwd xmmB,xmmF ; xmmB=(01 05 09 0D 11 15 19 1D 21 25 29 2D 31 35 39 3D)
michael@0 238
michael@0 239 movdqa xmmG,xmmD
michael@0 240 punpcklwd xmmD,xmmC ; xmmD=(02 06 0A 0E 12 16 1A 1E 22 26 2A 2E 32 36 3A 3E)
michael@0 241 punpckhwd xmmG,xmmC ; xmmG=(03 07 0B 0F 13 17 1B 1F 23 27 2B 2F 33 37 3B 3F)
michael@0 242
michael@0 243 movdqa xmmE,xmmA
michael@0 244 punpcklbw xmmA,xmmD ; xmmA=(00 02 04 06 08 0A 0C 0E 10 12 14 16 18 1A 1C 1E)
michael@0 245 punpckhbw xmmE,xmmD ; xmmE=(20 22 24 26 28 2A 2C 2E 30 32 34 36 38 3A 3C 3E)
michael@0 246
michael@0 247 movdqa xmmH,xmmB
michael@0 248 punpcklbw xmmB,xmmG ; xmmB=(01 03 05 07 09 0B 0D 0F 11 13 15 17 19 1B 1D 1F)
michael@0 249 punpckhbw xmmH,xmmG ; xmmH=(21 23 25 27 29 2B 2D 2F 31 33 35 37 39 3B 3D 3F)
michael@0 250
michael@0 251 pxor xmmF,xmmF
michael@0 252
michael@0 253 movdqa xmmC,xmmA
michael@0 254 punpcklbw xmmA,xmmF ; xmmA=(00 02 04 06 08 0A 0C 0E)
michael@0 255 punpckhbw xmmC,xmmF ; xmmC=(10 12 14 16 18 1A 1C 1E)
michael@0 256
michael@0 257 movdqa xmmD,xmmB
michael@0 258 punpcklbw xmmB,xmmF ; xmmB=(01 03 05 07 09 0B 0D 0F)
michael@0 259 punpckhbw xmmD,xmmF ; xmmD=(11 13 15 17 19 1B 1D 1F)
michael@0 260
michael@0 261 movdqa xmmG,xmmE
michael@0 262 punpcklbw xmmE,xmmF ; xmmE=(20 22 24 26 28 2A 2C 2E)
michael@0 263 punpckhbw xmmG,xmmF ; xmmG=(30 32 34 36 38 3A 3C 3E)
michael@0 264
michael@0 265 punpcklbw xmmF,xmmH
michael@0 266 punpckhbw xmmH,xmmH
michael@0 267 psrlw xmmF,BYTE_BIT ; xmmF=(21 23 25 27 29 2B 2D 2F)
michael@0 268 psrlw xmmH,BYTE_BIT ; xmmH=(31 33 35 37 39 3B 3D 3F)
michael@0 269
michael@0 270 %endif ; RGB_PIXELSIZE ; ---------------
michael@0 271
michael@0 272 ; xmm0=R(02468ACE)=RE, xmm2=G(02468ACE)=GE, xmm4=B(02468ACE)=BE
michael@0 273 ; xmm1=R(13579BDF)=RO, xmm3=G(13579BDF)=GO, xmm5=B(13579BDF)=BO
michael@0 274
michael@0 275 ; (Original)
michael@0 276 ; Y = 0.29900 * R + 0.58700 * G + 0.11400 * B
michael@0 277 ;
michael@0 278 ; (This implementation)
michael@0 279 ; Y = 0.29900 * R + 0.33700 * G + 0.11400 * B + 0.25000 * G
michael@0 280
michael@0 281 movdqa xmm6,xmm1
michael@0 282 punpcklwd xmm1,xmm3
michael@0 283 punpckhwd xmm6,xmm3
michael@0 284 pmaddwd xmm1,[rel PW_F0299_F0337] ; xmm1=ROL*FIX(0.299)+GOL*FIX(0.337)
michael@0 285 pmaddwd xmm6,[rel PW_F0299_F0337] ; xmm6=ROH*FIX(0.299)+GOH*FIX(0.337)
michael@0 286
michael@0 287 movdqa xmm7, xmm6 ; xmm7=ROH*FIX(0.299)+GOH*FIX(0.337)
michael@0 288
michael@0 289 movdqa xmm6,xmm0
michael@0 290 punpcklwd xmm0,xmm2
michael@0 291 punpckhwd xmm6,xmm2
michael@0 292 pmaddwd xmm0,[rel PW_F0299_F0337] ; xmm0=REL*FIX(0.299)+GEL*FIX(0.337)
michael@0 293 pmaddwd xmm6,[rel PW_F0299_F0337] ; xmm6=REH*FIX(0.299)+GEH*FIX(0.337)
michael@0 294
michael@0 295 movdqa XMMWORD [wk(0)], xmm0 ; wk(0)=REL*FIX(0.299)+GEL*FIX(0.337)
michael@0 296 movdqa XMMWORD [wk(1)], xmm6 ; wk(1)=REH*FIX(0.299)+GEH*FIX(0.337)
michael@0 297
michael@0 298 movdqa xmm0, xmm5 ; xmm0=BO
michael@0 299 movdqa xmm6, xmm4 ; xmm6=BE
michael@0 300
michael@0 301 movdqa xmm4,xmm0
michael@0 302 punpcklwd xmm0,xmm3
michael@0 303 punpckhwd xmm4,xmm3
michael@0 304 pmaddwd xmm0,[rel PW_F0114_F0250] ; xmm0=BOL*FIX(0.114)+GOL*FIX(0.250)
michael@0 305 pmaddwd xmm4,[rel PW_F0114_F0250] ; xmm4=BOH*FIX(0.114)+GOH*FIX(0.250)
michael@0 306
michael@0 307 movdqa xmm3,[rel PD_ONEHALF] ; xmm3=[PD_ONEHALF]
michael@0 308
michael@0 309 paddd xmm0, xmm1
michael@0 310 paddd xmm4, xmm7
michael@0 311 paddd xmm0,xmm3
michael@0 312 paddd xmm4,xmm3
michael@0 313 psrld xmm0,SCALEBITS ; xmm0=YOL
michael@0 314 psrld xmm4,SCALEBITS ; xmm4=YOH
michael@0 315 packssdw xmm0,xmm4 ; xmm0=YO
michael@0 316
michael@0 317 movdqa xmm4,xmm6
michael@0 318 punpcklwd xmm6,xmm2
michael@0 319 punpckhwd xmm4,xmm2
michael@0 320 pmaddwd xmm6,[rel PW_F0114_F0250] ; xmm6=BEL*FIX(0.114)+GEL*FIX(0.250)
michael@0 321 pmaddwd xmm4,[rel PW_F0114_F0250] ; xmm4=BEH*FIX(0.114)+GEH*FIX(0.250)
michael@0 322
michael@0 323 movdqa xmm2,[rel PD_ONEHALF] ; xmm2=[PD_ONEHALF]
michael@0 324
michael@0 325 paddd xmm6, XMMWORD [wk(0)]
michael@0 326 paddd xmm4, XMMWORD [wk(1)]
michael@0 327 paddd xmm6,xmm2
michael@0 328 paddd xmm4,xmm2
michael@0 329 psrld xmm6,SCALEBITS ; xmm6=YEL
michael@0 330 psrld xmm4,SCALEBITS ; xmm4=YEH
michael@0 331 packssdw xmm6,xmm4 ; xmm6=YE
michael@0 332
michael@0 333 psllw xmm0,BYTE_BIT
michael@0 334 por xmm6,xmm0 ; xmm6=Y
michael@0 335 movdqa XMMWORD [rdi], xmm6 ; Save Y
michael@0 336
michael@0 337 sub rcx, byte SIZEOF_XMMWORD
michael@0 338 add rsi, byte RGB_PIXELSIZE*SIZEOF_XMMWORD ; inptr
michael@0 339 add rdi, byte SIZEOF_XMMWORD ; outptr0
michael@0 340 cmp rcx, byte SIZEOF_XMMWORD
michael@0 341 jae near .columnloop
michael@0 342 test rcx,rcx
michael@0 343 jnz near .column_ld1
michael@0 344
michael@0 345 pop rcx ; col
michael@0 346 pop rsi
michael@0 347 pop rdi
michael@0 348
michael@0 349 add rsi, byte SIZEOF_JSAMPROW ; input_buf
michael@0 350 add rdi, byte SIZEOF_JSAMPROW
michael@0 351 dec rax ; num_rows
michael@0 352 jg near .rowloop
michael@0 353
michael@0 354 .return:
michael@0 355 pop rbx
michael@0 356 uncollect_args
michael@0 357 mov rsp,rbp ; rsp <- aligned rbp
michael@0 358 pop rsp ; rsp <- original rbp
michael@0 359 pop rbp
michael@0 360 ret
michael@0 361
michael@0 362 ; For some reason, the OS X linker does not honor the request to align the
michael@0 363 ; segment unless we do this.
michael@0 364 align 16

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