libavcodec/x86/xvididct_sse2.c

   1 /*
   2  * XVID MPEG-4 VIDEO CODEC
   3  * - SSE2 inverse discrete cosine transform -
   4  *
   5  * Copyright(C) 2003 Pascal Massimino <skal@planet-d.net>
   6  *
   7  * Conversion to gcc syntax with modifications
   8  * by Alexander Strange <astrange@ithinksw.com>
   9  *
  10  * Originally from dct/x86_asm/fdct_sse2_skal.asm in Xvid.
  11  *
  12  * This file is part of Libav.
  13  *
  14  * Vertical pass is an implementation of the scheme:
  15  *  Loeffler C., Ligtenberg A., and Moschytz C.S.:
  16  *  Practical Fast 1D DCT Algorithm with Eleven Multiplications,
  17  *  Proc. ICASSP 1989, 988-991.
  18  *
  19  * Horizontal pass is a double 4x4 vector/matrix multiplication,
  20  * (see also Intel's Application Note 922:
  21  *  http://developer.intel.com/vtune/cbts/strmsimd/922down.htm
  22  *  Copyright (C) 1999 Intel Corporation)
  23  *
  24  * More details at http://skal.planet-d.net/coding/dct.html
  25  *
  26  * Libav is free software; you can redistribute it and/or
  27  * modify it under the terms of the GNU Lesser General Public
  28  * License as published by the Free Software Foundation; either
  29  * version 2.1 of the License, or (at your option) any later version.
  30  *
  31  * Libav is distributed in the hope that it will be useful,
  32  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  33  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  34  * Lesser General Public License for more details.
  35  *
  36  * You should have received a copy of the GNU Lesser General Public License
  37  * along with Libav; if not, write to the Free Software Foundation,
  38  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  39  */
  40
  41 #include "libavutil/internal.h"
  42 #include "libavutil/mem.h"
  43 #include "libavutil/x86/asm.h"
  44
  45 #include "idctdsp.h"
  46 #include "xvididct.h"
  47
  48 #if HAVE_SSE2_INLINE
  49
  50 /**
  51  * @file
  52  * @brief SSE2 IDCT compatible with the Xvid IDCT
  53  */
  54
  55 #define X8(x) x, x, x, x, x, x, x, x
  56
  57 DECLARE_ASM_CONST(16, int16_t, tan1)[]  = { X8(13036) }; // tan( pi/16)
  58 DECLARE_ASM_CONST(16, int16_t, tan2)[]  = { X8(27146) }; // tan(2pi/16) = sqrt(2)-1
  59 DECLARE_ASM_CONST(16, int16_t, tan3)[]  = { X8(43790) }; // tan(3pi/16)-1
  60 DECLARE_ASM_CONST(16, int16_t, sqrt2)[] = { X8(23170) }; // 0.5/sqrt(2)
  61 DECLARE_ASM_CONST(8,  uint8_t, m127)[]  = { X8(127) };
  62
  63 DECLARE_ASM_CONST(16, int16_t, iTab1)[] = {
  64     0x4000, 0x539f, 0xc000, 0xac61, 0x4000, 0xdd5d, 0x4000, 0xdd5d,
  65     0x4000, 0x22a3, 0x4000, 0x22a3, 0xc000, 0x539f, 0x4000, 0xac61,
  66     0x3249, 0x11a8, 0x4b42, 0xee58, 0x11a8, 0x4b42, 0x11a8, 0xcdb7,
  67     0x58c5, 0x4b42, 0xa73b, 0xcdb7, 0x3249, 0xa73b, 0x4b42, 0xa73b
  68 };
  69
  70 DECLARE_ASM_CONST(16, int16_t, iTab2)[] = {
  71     0x58c5, 0x73fc, 0xa73b, 0x8c04, 0x58c5, 0xcff5, 0x58c5, 0xcff5,
  72     0x58c5, 0x300b, 0x58c5, 0x300b, 0xa73b, 0x73fc, 0x58c5, 0x8c04,
  73     0x45bf, 0x187e, 0x6862, 0xe782, 0x187e, 0x6862, 0x187e, 0xba41,
  74     0x7b21, 0x6862, 0x84df, 0xba41, 0x45bf, 0x84df, 0x6862, 0x84df
  75 };
  76
  77 DECLARE_ASM_CONST(16, int16_t, iTab3)[] = {
  78     0x539f, 0x6d41, 0xac61, 0x92bf, 0x539f, 0xd2bf, 0x539f, 0xd2bf,
  79     0x539f, 0x2d41, 0x539f, 0x2d41, 0xac61, 0x6d41, 0x539f, 0x92bf,
  80     0x41b3, 0x1712, 0x6254, 0xe8ee, 0x1712, 0x6254, 0x1712, 0xbe4d,
  81     0x73fc, 0x6254, 0x8c04, 0xbe4d, 0x41b3, 0x8c04, 0x6254, 0x8c04
  82 };
  83
  84 DECLARE_ASM_CONST(16, int16_t, iTab4)[] = {
  85     0x4b42, 0x6254, 0xb4be, 0x9dac, 0x4b42, 0xd746, 0x4b42, 0xd746,
  86     0x4b42, 0x28ba, 0x4b42, 0x28ba, 0xb4be, 0x6254, 0x4b42, 0x9dac,
  87     0x3b21, 0x14c3, 0x587e, 0xeb3d, 0x14c3, 0x587e, 0x14c3, 0xc4df,
  88     0x6862, 0x587e, 0x979e, 0xc4df, 0x3b21, 0x979e, 0x587e, 0x979e
  89 };
  90
  91 DECLARE_ASM_CONST(16, int32_t, walkenIdctRounders)[] = {
  92     65536, 65536, 65536, 65536,
  93      3597,  3597,  3597,  3597,
  94      2260,  2260,  2260,  2260,
  95      1203,  1203,  1203,  1203,
  96       120,   120,   120,   120,
  97       512,   512,   512,   512
  98 };
  99
 100 // Temporary storage before the column pass
 101 #define ROW1 "%%xmm6"
 102 #define ROW3 "%%xmm4"
 103 #define ROW5 "%%xmm5"
 104 #define ROW7 "%%xmm7"
 105
 106 #define CLEAR_ODD(r) "pxor  "r","r" \n\t"
 107 #define PUT_ODD(dst) "pshufhw  $0x1B, %%xmm2, "dst"   \n\t"
 108
 109 #if ARCH_X86_64
 110
 111 # define ROW0 "%%xmm8"
 112 # define REG0 ROW0
 113 # define ROW2 "%%xmm9"
 114 # define REG2 ROW2
 115 # define ROW4 "%%xmm10"
 116 # define REG4 ROW4
 117 # define ROW6 "%%xmm11"
 118 # define REG6 ROW6
 119 # define CLEAR_EVEN(r) CLEAR_ODD(r)
 120 # define PUT_EVEN(dst) PUT_ODD(dst)
 121 # define XMMS "%%xmm12"
 122 # define MOV_32_ONLY "#"
 123 # define SREG2 REG2
 124 # define TAN3 "%%xmm13"
 125 # define TAN1 "%%xmm14"
 126
 127 #else
 128
 129 # define ROW0 "(%0)"
 130 # define REG0 "%%xmm4"
 131 # define ROW2 "2*16(%0)"
 132 # define REG2 "%%xmm4"
 133 # define ROW4 "4*16(%0)"
 134 # define REG4 "%%xmm6"
 135 # define ROW6 "6*16(%0)"
 136 # define REG6 "%%xmm6"
 137 # define CLEAR_EVEN(r)
 138 # define PUT_EVEN(dst) \
 139     "pshufhw  $0x1B, %%xmm2, %%xmm2   \n\t" \
 140     "movdqa          %%xmm2, "dst"    \n\t"
 141 # define XMMS "%%xmm2"
 142 # define MOV_32_ONLY "movdqa "
 143 # define SREG2 "%%xmm7"
 144 # define TAN3 "%%xmm0"
 145 # define TAN1 "%%xmm2"
 146
 147 #endif
 148
 149 #define ROUND(x) "paddd   "MANGLE(x)
 150
 151 #define JZ(reg, to)                         \
 152     "testl     "reg","reg"            \n\t" \
 153     "jz        "to"                   \n\t"
 154
 155 #define JNZ(reg, to)                        \
 156     "testl     "reg","reg"            \n\t" \
 157     "jnz       "to"                   \n\t"
 158
 159 #define TEST_ONE_ROW(src, reg, clear)       \
 160     clear                                   \
 161     "movq     "src", %%mm1            \n\t" \
 162     "por    8+"src", %%mm1            \n\t" \
 163     "paddusb  %%mm0, %%mm1            \n\t" \
 164     "pmovmskb %%mm1, "reg"            \n\t"
 165
 166 #define TEST_TWO_ROWS(row1, row2, reg1, reg2, clear1, clear2) \
 167     clear1                                                    \
 168     clear2                                                    \
 169     "movq     "row1", %%mm1           \n\t"                   \
 170     "por    8+"row1", %%mm1           \n\t"                   \
 171     "movq     "row2", %%mm2           \n\t"                   \
 172     "por    8+"row2", %%mm2           \n\t"                   \
 173     "paddusb   %%mm0, %%mm1           \n\t"                   \
 174     "paddusb   %%mm0, %%mm2           \n\t"                   \
 175     "pmovmskb  %%mm1, "reg1"          \n\t"                   \
 176     "pmovmskb  %%mm2, "reg2"          \n\t"
 177
 178 /// IDCT pass on rows.
 179 #define iMTX_MULT(src, table, rounder, put)            \
 180     "movdqa        "src", %%xmm3      \n\t"            \
 181     "movdqa       %%xmm3, %%xmm0      \n\t"            \
 182     "pshufd   $0x11, %%xmm3, %%xmm1   \n\t" /* 4602 */ \
 183     "punpcklqdq   %%xmm0, %%xmm0      \n\t" /* 0246 */ \
 184     "pmaddwd     "table", %%xmm0      \n\t"            \
 185     "pmaddwd  16+"table", %%xmm1      \n\t"            \
 186     "pshufd   $0xBB, %%xmm3, %%xmm2   \n\t" /* 5713 */ \
 187     "punpckhqdq   %%xmm3, %%xmm3      \n\t" /* 1357 */ \
 188     "pmaddwd  32+"table", %%xmm2      \n\t"            \
 189     "pmaddwd  48+"table", %%xmm3      \n\t"            \
 190     "paddd        %%xmm1, %%xmm0      \n\t"            \
 191     "paddd        %%xmm3, %%xmm2      \n\t"            \
 192     rounder",     %%xmm0              \n\t"            \
 193     "movdqa       %%xmm2, %%xmm3      \n\t"            \
 194     "paddd        %%xmm0, %%xmm2      \n\t"            \
 195     "psubd        %%xmm3, %%xmm0      \n\t"            \
 196     "psrad           $11, %%xmm2      \n\t"            \
 197     "psrad           $11, %%xmm0      \n\t"            \
 198     "packssdw     %%xmm0, %%xmm2      \n\t"            \
 199     put                                                \
 200     "1:                               \n\t"
 201
 202 #define iLLM_HEAD                           \
 203     "movdqa   "MANGLE(tan3)", "TAN3"  \n\t" \
 204     "movdqa   "MANGLE(tan1)", "TAN1"  \n\t" \
 205
 206 /// IDCT pass on columns.
 207 #define iLLM_PASS(dct)                      \
 208     "movdqa   "TAN3", %%xmm1          \n\t" \
 209     "movdqa   "TAN1", %%xmm3          \n\t" \
 210     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 211     "pmulhw   %%xmm5, %%xmm1          \n\t" \
 212     "paddsw   %%xmm4, "TAN3"          \n\t" \
 213     "paddsw   %%xmm5, %%xmm1          \n\t" \
 214     "psubsw   %%xmm5, "TAN3"          \n\t" \
 215     "paddsw   %%xmm4, %%xmm1          \n\t" \
 216     "pmulhw   %%xmm7, %%xmm3          \n\t" \
 217     "pmulhw   %%xmm6, "TAN1"          \n\t" \
 218     "paddsw   %%xmm6, %%xmm3          \n\t" \
 219     "psubsw   %%xmm7, "TAN1"          \n\t" \
 220     "movdqa   %%xmm3, %%xmm7          \n\t" \
 221     "movdqa   "TAN1", %%xmm6          \n\t" \
 222     "psubsw   %%xmm1, %%xmm3          \n\t" \
 223     "psubsw   "TAN3", "TAN1"          \n\t" \
 224     "paddsw   %%xmm7, %%xmm1          \n\t" \
 225     "paddsw   %%xmm6, "TAN3"          \n\t" \
 226     "movdqa   %%xmm3, %%xmm6          \n\t" \
 227     "psubsw   "TAN3", %%xmm3          \n\t" \
 228     "paddsw   %%xmm6, "TAN3"          \n\t" \
 229     "movdqa   "MANGLE(sqrt2)", %%xmm4 \n\t" \
 230     "pmulhw   %%xmm4, %%xmm3          \n\t" \
 231     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 232     "paddsw   "TAN3", "TAN3"          \n\t" \
 233     "paddsw   %%xmm3, %%xmm3          \n\t" \
 234     "movdqa   "MANGLE(tan2)", %%xmm7  \n\t" \
 235     MOV_32_ONLY ROW2", "REG2"         \n\t" \
 236     MOV_32_ONLY ROW6", "REG6"         \n\t" \
 237     "movdqa   %%xmm7, %%xmm5          \n\t" \
 238     "pmulhw   "REG6", %%xmm7          \n\t" \
 239     "pmulhw   "REG2", %%xmm5          \n\t" \
 240     "paddsw   "REG2", %%xmm7          \n\t" \
 241     "psubsw   "REG6", %%xmm5          \n\t" \
 242     MOV_32_ONLY ROW0", "REG0"         \n\t" \
 243     MOV_32_ONLY ROW4", "REG4"         \n\t" \
 244     MOV_32_ONLY"  "TAN1", (%0)        \n\t" \
 245     "movdqa   "REG0", "XMMS"          \n\t" \
 246     "psubsw   "REG4", "REG0"          \n\t" \
 247     "paddsw   "XMMS", "REG4"          \n\t" \
 248     "movdqa   "REG4", "XMMS"          \n\t" \
 249     "psubsw   %%xmm7, "REG4"          \n\t" \
 250     "paddsw   "XMMS", %%xmm7          \n\t" \
 251     "movdqa   "REG0", "XMMS"          \n\t" \
 252     "psubsw   %%xmm5, "REG0"          \n\t" \
 253     "paddsw   "XMMS", %%xmm5          \n\t" \
 254     "movdqa   %%xmm5, "XMMS"          \n\t" \
 255     "psubsw   "TAN3", %%xmm5          \n\t" \
 256     "paddsw   "XMMS", "TAN3"          \n\t" \
 257     "movdqa   "REG0", "XMMS"          \n\t" \
 258     "psubsw   %%xmm3, "REG0"          \n\t" \
 259     "paddsw   "XMMS", %%xmm3          \n\t" \
 260     MOV_32_ONLY"  (%0), "TAN1"        \n\t" \
 261     "psraw        $6, %%xmm5          \n\t" \
 262     "psraw        $6, "REG0"          \n\t" \
 263     "psraw        $6, "TAN3"          \n\t" \
 264     "psraw        $6, %%xmm3          \n\t" \
 265     "movdqa   "TAN3", 1*16("dct")     \n\t" \
 266     "movdqa   %%xmm3, 2*16("dct")     \n\t" \
 267     "movdqa   "REG0", 5*16("dct")     \n\t" \
 268     "movdqa   %%xmm5, 6*16("dct")     \n\t" \
 269     "movdqa   %%xmm7, %%xmm0          \n\t" \
 270     "movdqa   "REG4", %%xmm4          \n\t" \
 271     "psubsw   %%xmm1, %%xmm7          \n\t" \
 272     "psubsw   "TAN1", "REG4"          \n\t" \
 273     "paddsw   %%xmm0, %%xmm1          \n\t" \
 274     "paddsw   %%xmm4, "TAN1"          \n\t" \
 275     "psraw        $6, %%xmm1          \n\t" \
 276     "psraw        $6, %%xmm7          \n\t" \
 277     "psraw        $6, "TAN1"          \n\t" \
 278     "psraw        $6, "REG4"          \n\t" \
 279     "movdqa   %%xmm1, ("dct")         \n\t" \
 280     "movdqa   "TAN1", 3*16("dct")     \n\t" \
 281     "movdqa   "REG4", 4*16("dct")     \n\t" \
 282     "movdqa   %%xmm7, 7*16("dct")     \n\t"
 283
 284 /// IDCT pass on columns, assuming rows 4-7 are zero.
 285 #define iLLM_PASS_SPARSE(dct)               \
 286     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 287     "paddsw   %%xmm4, "TAN3"          \n\t" \
 288     "movdqa   %%xmm6, %%xmm3          \n\t" \
 289     "pmulhw   %%xmm6, "TAN1"          \n\t" \
 290     "movdqa   %%xmm4, %%xmm1          \n\t" \
 291     "psubsw   %%xmm1, %%xmm3          \n\t" \
 292     "paddsw   %%xmm6, %%xmm1          \n\t" \
 293     "movdqa   "TAN1", %%xmm6          \n\t" \
 294     "psubsw   "TAN3", "TAN1"          \n\t" \
 295     "paddsw   %%xmm6, "TAN3"          \n\t" \
 296     "movdqa   %%xmm3, %%xmm6          \n\t" \
 297     "psubsw   "TAN3", %%xmm3          \n\t" \
 298     "paddsw   %%xmm6, "TAN3"          \n\t" \
 299     "movdqa   "MANGLE(sqrt2)", %%xmm4 \n\t" \
 300     "pmulhw   %%xmm4, %%xmm3          \n\t" \
 301     "pmulhw   %%xmm4, "TAN3"          \n\t" \
 302     "paddsw   "TAN3", "TAN3"          \n\t" \
 303     "paddsw   %%xmm3, %%xmm3          \n\t" \
 304     "movdqa   "MANGLE(tan2)", %%xmm5  \n\t" \
 305     MOV_32_ONLY ROW2", "SREG2"        \n\t" \
 306     "pmulhw   "SREG2", %%xmm5         \n\t" \
 307     MOV_32_ONLY ROW0", "REG0"         \n\t" \
 308     "movdqa   "REG0", %%xmm6          \n\t" \
 309     "psubsw   "SREG2", %%xmm6         \n\t" \
 310     "paddsw   "REG0", "SREG2"         \n\t" \
 311     MOV_32_ONLY"  "TAN1", (%0)        \n\t" \
 312     "movdqa   "REG0", "XMMS"          \n\t" \
 313     "psubsw   %%xmm5, "REG0"          \n\t" \
 314     "paddsw   "XMMS", %%xmm5          \n\t" \
 315     "movdqa   %%xmm5, "XMMS"          \n\t" \
 316     "psubsw   "TAN3", %%xmm5          \n\t" \
 317     "paddsw   "XMMS", "TAN3"          \n\t" \
 318     "movdqa   "REG0", "XMMS"          \n\t" \
 319     "psubsw   %%xmm3, "REG0"          \n\t" \
 320     "paddsw   "XMMS", %%xmm3          \n\t" \
 321     MOV_32_ONLY"  (%0), "TAN1"        \n\t" \
 322     "psraw        $6, %%xmm5          \n\t" \
 323     "psraw        $6, "REG0"          \n\t" \
 324     "psraw        $6, "TAN3"          \n\t" \
 325     "psraw        $6, %%xmm3          \n\t" \
 326     "movdqa   "TAN3", 1*16("dct")     \n\t" \
 327     "movdqa   %%xmm3, 2*16("dct")     \n\t" \
 328     "movdqa   "REG0", 5*16("dct")     \n\t" \
 329     "movdqa   %%xmm5, 6*16("dct")     \n\t" \
 330     "movdqa   "SREG2", %%xmm0         \n\t" \
 331     "movdqa   %%xmm6, %%xmm4          \n\t" \
 332     "psubsw   %%xmm1, "SREG2"         \n\t" \
 333     "psubsw   "TAN1", %%xmm6          \n\t" \
 334     "paddsw   %%xmm0, %%xmm1          \n\t" \
 335     "paddsw   %%xmm4, "TAN1"          \n\t" \
 336     "psraw        $6, %%xmm1          \n\t" \
 337     "psraw        $6, "SREG2"         \n\t" \
 338     "psraw        $6, "TAN1"          \n\t" \
 339     "psraw        $6, %%xmm6          \n\t" \
 340     "movdqa   %%xmm1, ("dct")         \n\t" \
 341     "movdqa   "TAN1", 3*16("dct")     \n\t" \
 342     "movdqa   %%xmm6, 4*16("dct")     \n\t" \
 343     "movdqa   "SREG2", 7*16("dct")    \n\t"
 344
 345 void ff_xvid_idct_sse2(short *block)
 346 {
 347     __asm__ volatile (
 348         "movq     "MANGLE (m127) ", %%mm0                              \n\t"
 349         iMTX_MULT("(%0)",     MANGLE(iTab1), ROUND(walkenIdctRounders),          PUT_EVEN(ROW0))
 350         iMTX_MULT("1*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders + 1 * 16), PUT_ODD(ROW1))
 351         iMTX_MULT("2*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders + 2 * 16), PUT_EVEN(ROW2))
 352
 353         TEST_TWO_ROWS("3*16(%0)", "4*16(%0)", "%%eax", "%%ecx", CLEAR_ODD(ROW3), CLEAR_EVEN(ROW4))
 354         JZ("%%eax", "1f")
 355         iMTX_MULT("3*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders + 3 * 16), PUT_ODD(ROW3))
 356
 357         TEST_TWO_ROWS("5*16(%0)", "6*16(%0)", "%%eax", "%%edx", CLEAR_ODD(ROW5), CLEAR_EVEN(ROW6))
 358         TEST_ONE_ROW("7*16(%0)", "%%esi", CLEAR_ODD(ROW7))
 359         iLLM_HEAD
 360         ".p2align 4 \n\t"
 361         JNZ("%%ecx", "2f")
 362         JNZ("%%eax", "3f")
 363         JNZ("%%edx", "4f")
 364         JNZ("%%esi", "5f")
 365         iLLM_PASS_SPARSE("%0")
 366         "jmp 6f                                                      \n\t"
 367         "2:                                                          \n\t"
 368         iMTX_MULT("4*16(%0)", MANGLE(iTab1), "#", PUT_EVEN(ROW4))
 369         "3:                                                          \n\t"
 370         iMTX_MULT("5*16(%0)", MANGLE(iTab4), ROUND(walkenIdctRounders + 4 * 16), PUT_ODD(ROW5))
 371         JZ("%%edx", "1f")
 372         "4:                                                          \n\t"
 373         iMTX_MULT("6*16(%0)", MANGLE(iTab3), ROUND(walkenIdctRounders + 5 * 16), PUT_EVEN(ROW6))
 374         JZ("%%esi", "1f")
 375         "5:                                                          \n\t"
 376         iMTX_MULT("7*16(%0)", MANGLE(iTab2), ROUND(walkenIdctRounders + 5 * 16), PUT_ODD(ROW7))
 377 #if ARCH_X86_32
 378         iLLM_HEAD
 379 #endif
 380         iLLM_PASS("%0")
 381         "6:                                                          \n\t"
 382         : "+r" (block)
 383         :
 384         : XMM_CLOBBERS("%xmm0", "%xmm1", "%xmm2", "%xmm3",
 385                        "%xmm4", "%xmm5", "%xmm6", "%xmm7", )
 386 #if ARCH_X86_64
 387           XMM_CLOBBERS("%xmm8", "%xmm9", "%xmm10", "%xmm11",
 388                        "%xmm12", "%xmm13", "%xmm14", )
 389 #endif
 390           "%eax", "%ecx", "%edx", "%esi", "memory");
 391 }
 392
 393 void ff_xvid_idct_sse2_put(uint8_t *dest, ptrdiff_t line_size, short *block)
 394 {
 395     ff_xvid_idct_sse2(block);
 396     ff_put_pixels_clamped_mmx(block, dest, line_size);
 397 }
 398
 399 void ff_xvid_idct_sse2_add(uint8_t *dest, ptrdiff_t line_size, short *block)
 400 {
 401     ff_xvid_idct_sse2(block);
 402     ff_add_pixels_clamped_mmx(block, dest, line_size);
 403 }
 404
 405 #endif /* HAVE_SSE2_INLINE */