FFmpeg: libavcodec/x86/fdct

00001 /*
00002  * MMX optimized forward DCT
00003  * The gcc porting is Copyright (c) 2001 Fabrice Bellard.
00004  * cleanup/optimizations are Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
00005  * SSE2 optimization is Copyright (c) 2004 Denes Balatoni.
00006  *
00007  * from  fdctam32.c - AP922 MMX(3D-Now) forward-DCT
00008  *
00009  *  Intel Application Note AP-922 - fast, precise implementation of DCT
00010  *        http://developer.intel.com/vtune/cbts/appnotes.htm
00011  *
00012  * Also of inspiration:
00013  * a page about fdct at http://www.geocities.com/ssavekar/dct.htm
00014  * Skal's fdct at http://skal.planet-d.net/coding/dct.html
00015  *
00016  * This file is part of FFmpeg.
00017  *
00018  * FFmpeg is free software; you can redistribute it and/or
00019  * modify it under the terms of the GNU Lesser General Public
00020  * License as published by the Free Software Foundation; either
00021  * version 2.1 of the License, or (at your option) any later version.
00022  *
00023  * FFmpeg is distributed in the hope that it will be useful,
00024  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00025  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00026  * Lesser General Public License for more details.
00027  *
00028  * You should have received a copy of the GNU Lesser General Public
00029  * License along with FFmpeg; if not, write to the Free Software
00030  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00031  */
00032 
00033 #include "libavutil/common.h"
00034 #include "libavcodec/dsputil.h"
00035 
00037 //
00038 // constants for the forward DCT
00039 // -----------------------------
00040 //
00041 // Be sure to check that your compiler is aligning all constants to QWORD
00042 // (8-byte) memory boundaries!  Otherwise the unaligned memory access will
00043 // severely stall MMX execution.
00044 //
00046 
00047 #define BITS_FRW_ACC   3 //; 2 or 3 for accuracy
00048 #define SHIFT_FRW_COL  BITS_FRW_ACC
00049 #define SHIFT_FRW_ROW  (BITS_FRW_ACC + 17 - 3)
00050 #define RND_FRW_ROW    (1 << (SHIFT_FRW_ROW-1))
00051 //#define RND_FRW_COL    (1 << (SHIFT_FRW_COL-1))
00052 
00053 #define X8(x) x,x,x,x,x,x,x,x
00054 
00055 //concatenated table, for forward DCT transformation
00056 DECLARE_ALIGNED(16, static const int16_t, fdct_tg_all_16)[24] = {
00057     X8(13036),  // tg * (2<<16) + 0.5
00058     X8(27146),  // tg * (2<<16) + 0.5
00059     X8(-21746)  // tg * (2<<16) + 0.5
00060 };
00061 
00062 DECLARE_ALIGNED(16, static const int16_t, ocos_4_16)[8] = {
00063     X8(23170)   //cos * (2<<15) + 0.5
00064 };
00065 
00066 DECLARE_ALIGNED(16, static const int16_t, fdct_one_corr)[8] = { X8(1) };
00067 
00068 DECLARE_ALIGNED(8, static const int32_t, fdct_r_row)[2] = {RND_FRW_ROW, RND_FRW_ROW };
00069 
00070 static struct
00071 {
00072  DECLARE_ALIGNED(16, const int32_t, fdct_r_row_sse2)[4];
00073 } fdct_r_row_sse2 =
00074 {{
00075  RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW
00076 }};
00077 //DECLARE_ALIGNED(16, static const long, fdct_r_row_sse2)[4] = {RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW, RND_FRW_ROW};
00078 
00079 DECLARE_ALIGNED(8, static const int16_t, tab_frw_01234567)[] = {  // forward_dct coeff table
00080   16384,   16384,   22725,   19266,
00081   16384,   16384,   12873,    4520,
00082   21407,    8867,   19266,   -4520,
00083   -8867,  -21407,  -22725,  -12873,
00084   16384,  -16384,   12873,  -22725,
00085  -16384,   16384,    4520,   19266,
00086    8867,  -21407,    4520,  -12873,
00087   21407,   -8867,   19266,  -22725,
00088 
00089   22725,   22725,   31521,   26722,
00090   22725,   22725,   17855,    6270,
00091   29692,   12299,   26722,   -6270,
00092  -12299,  -29692,  -31521,  -17855,
00093   22725,  -22725,   17855,  -31521,
00094  -22725,   22725,    6270,   26722,
00095   12299,  -29692,    6270,  -17855,
00096   29692,  -12299,   26722,  -31521,
00097 
00098   21407,   21407,   29692,   25172,
00099   21407,   21407,   16819,    5906,
00100   27969,   11585,   25172,   -5906,
00101  -11585,  -27969,  -29692,  -16819,
00102   21407,  -21407,   16819,  -29692,
00103  -21407,   21407,    5906,   25172,
00104   11585,  -27969,    5906,  -16819,
00105   27969,  -11585,   25172,  -29692,
00106 
00107   19266,   19266,   26722,   22654,
00108   19266,   19266,   15137,    5315,
00109   25172,   10426,   22654,   -5315,
00110  -10426,  -25172,  -26722,  -15137,
00111   19266,  -19266,   15137,  -26722,
00112  -19266,   19266,    5315,   22654,
00113   10426,  -25172,    5315,  -15137,
00114   25172,  -10426,   22654,  -26722,
00115 
00116   16384,   16384,   22725,   19266,
00117   16384,   16384,   12873,    4520,
00118   21407,    8867,   19266,   -4520,
00119   -8867,  -21407,  -22725,  -12873,
00120   16384,  -16384,   12873,  -22725,
00121  -16384,   16384,    4520,   19266,
00122    8867,  -21407,    4520,  -12873,
00123   21407,   -8867,   19266,  -22725,
00124 
00125   19266,   19266,   26722,   22654,
00126   19266,   19266,   15137,    5315,
00127   25172,   10426,   22654,   -5315,
00128  -10426,  -25172,  -26722,  -15137,
00129   19266,  -19266,   15137,  -26722,
00130  -19266,   19266,    5315,   22654,
00131   10426,  -25172,    5315,  -15137,
00132   25172,  -10426,   22654,  -26722,
00133 
00134   21407,   21407,   29692,   25172,
00135   21407,   21407,   16819,    5906,
00136   27969,   11585,   25172,   -5906,
00137  -11585,  -27969,  -29692,  -16819,
00138   21407,  -21407,   16819,  -29692,
00139  -21407,   21407,    5906,   25172,
00140   11585,  -27969,    5906,  -16819,
00141   27969,  -11585,   25172,  -29692,
00142 
00143   22725,   22725,   31521,   26722,
00144   22725,   22725,   17855,    6270,
00145   29692,   12299,   26722,   -6270,
00146  -12299,  -29692,  -31521,  -17855,
00147   22725,  -22725,   17855,  -31521,
00148  -22725,   22725,    6270,   26722,
00149   12299,  -29692,    6270,  -17855,
00150   29692,  -12299,   26722,  -31521,
00151 };
00152 
00153 static struct
00154 {
00155  DECLARE_ALIGNED(16, const int16_t, tab_frw_01234567_sse2)[256];
00156 } tab_frw_01234567_sse2 =
00157 {{
00158 //DECLARE_ALIGNED(16, static const int16_t, tab_frw_01234567_sse2)[] = {  // forward_dct coeff table
00159 #define TABLE_SSE2 C4,  C4,  C1,  C3, -C6, -C2, -C1, -C5, \
00160                    C4,  C4,  C5,  C7,  C2,  C6,  C3, -C7, \
00161                   -C4,  C4,  C7,  C3,  C6, -C2,  C7, -C5, \
00162                    C4, -C4,  C5, -C1,  C2, -C6,  C3, -C1,
00163 // c1..c7 * cos(pi/4) * 2^15
00164 #define C1 22725
00165 #define C2 21407
00166 #define C3 19266
00167 #define C4 16384
00168 #define C5 12873
00169 #define C6 8867
00170 #define C7 4520
00171 TABLE_SSE2
00172 
00173 #undef C1
00174 #undef C2
00175 #undef C3
00176 #undef C4
00177 #undef C5
00178 #undef C6
00179 #undef C7
00180 #define C1 31521
00181 #define C2 29692
00182 #define C3 26722
00183 #define C4 22725
00184 #define C5 17855
00185 #define C6 12299
00186 #define C7 6270
00187 TABLE_SSE2
00188 
00189 #undef C1
00190 #undef C2
00191 #undef C3
00192 #undef C4
00193 #undef C5
00194 #undef C6
00195 #undef C7
00196 #define C1 29692
00197 #define C2 27969
00198 #define C3 25172
00199 #define C4 21407
00200 #define C5 16819
00201 #define C6 11585
00202 #define C7 5906
00203 TABLE_SSE2
00204 
00205 #undef C1
00206 #undef C2
00207 #undef C3
00208 #undef C4
00209 #undef C5
00210 #undef C6
00211 #undef C7
00212 #define C1 26722
00213 #define C2 25172
00214 #define C3 22654
00215 #define C4 19266
00216 #define C5 15137
00217 #define C6 10426
00218 #define C7 5315
00219 TABLE_SSE2
00220 
00221 #undef C1
00222 #undef C2
00223 #undef C3
00224 #undef C4
00225 #undef C5
00226 #undef C6
00227 #undef C7
00228 #define C1 22725
00229 #define C2 21407
00230 #define C3 19266
00231 #define C4 16384
00232 #define C5 12873
00233 #define C6 8867
00234 #define C7 4520
00235 TABLE_SSE2
00236 
00237 #undef C1
00238 #undef C2
00239 #undef C3
00240 #undef C4
00241 #undef C5
00242 #undef C6
00243 #undef C7
00244 #define C1 26722
00245 #define C2 25172
00246 #define C3 22654
00247 #define C4 19266
00248 #define C5 15137
00249 #define C6 10426
00250 #define C7 5315
00251 TABLE_SSE2
00252 
00253 #undef C1
00254 #undef C2
00255 #undef C3
00256 #undef C4
00257 #undef C5
00258 #undef C6
00259 #undef C7
00260 #define C1 29692
00261 #define C2 27969
00262 #define C3 25172
00263 #define C4 21407
00264 #define C5 16819
00265 #define C6 11585
00266 #define C7 5906
00267 TABLE_SSE2
00268 
00269 #undef C1
00270 #undef C2
00271 #undef C3
00272 #undef C4
00273 #undef C5
00274 #undef C6
00275 #undef C7
00276 #define C1 31521
00277 #define C2 29692
00278 #define C3 26722
00279 #define C4 22725
00280 #define C5 17855
00281 #define C6 12299
00282 #define C7 6270
00283 TABLE_SSE2
00284 }};
00285 
00286 #define S(s) AV_TOSTRING(s) //AV_STRINGIFY is too long
00287 
00288 #define FDCT_COL(cpu, mm, mov)\
00289 static av_always_inline void fdct_col_##cpu(const int16_t *in, int16_t *out, int offset)\
00290 {\
00291     __asm__ volatile (\
00292         #mov"      16(%0),  %%"#mm"0 \n\t" \
00293         #mov"      96(%0),  %%"#mm"1 \n\t" \
00294         #mov"    %%"#mm"0,  %%"#mm"2 \n\t" \
00295         #mov"      32(%0),  %%"#mm"3 \n\t" \
00296         "paddsw  %%"#mm"1,  %%"#mm"0 \n\t" \
00297         #mov"      80(%0),  %%"#mm"4 \n\t" \
00298         "psllw  $"S(SHIFT_FRW_COL)", %%"#mm"0 \n\t" \
00299         #mov"        (%0),  %%"#mm"5 \n\t" \
00300         "paddsw  %%"#mm"3,  %%"#mm"4 \n\t" \
00301         "paddsw   112(%0),  %%"#mm"5 \n\t" \
00302         "psllw  $"S(SHIFT_FRW_COL)", %%"#mm"4 \n\t" \
00303         #mov"    %%"#mm"0,  %%"#mm"6 \n\t" \
00304         "psubsw  %%"#mm"1,  %%"#mm"2 \n\t" \
00305         #mov"      16(%1),  %%"#mm"1 \n\t" \
00306         "psubsw  %%"#mm"4,  %%"#mm"0 \n\t" \
00307         #mov"      48(%0),  %%"#mm"7 \n\t" \
00308         "pmulhw  %%"#mm"0,  %%"#mm"1 \n\t" \
00309         "paddsw    64(%0),  %%"#mm"7 \n\t" \
00310         "psllw  $"S(SHIFT_FRW_COL)", %%"#mm"5 \n\t" \
00311         "paddsw  %%"#mm"4,  %%"#mm"6 \n\t" \
00312         "psllw  $"S(SHIFT_FRW_COL)", %%"#mm"7 \n\t" \
00313         #mov"    %%"#mm"5,  %%"#mm"4 \n\t" \
00314         "psubsw  %%"#mm"7,  %%"#mm"5 \n\t" \
00315         "paddsw  %%"#mm"5,  %%"#mm"1 \n\t" \
00316         "paddsw  %%"#mm"7,  %%"#mm"4 \n\t" \
00317         "por         (%2),  %%"#mm"1 \n\t" \
00318         "psllw  $"S(SHIFT_FRW_COL)"+1, %%"#mm"2 \n\t" \
00319         "pmulhw    16(%1),  %%"#mm"5 \n\t" \
00320         #mov"    %%"#mm"4,  %%"#mm"7 \n\t" \
00321         "psubsw    80(%0),  %%"#mm"3 \n\t" \
00322         "psubsw  %%"#mm"6,  %%"#mm"4 \n\t" \
00323         #mov"    %%"#mm"1,    32(%3) \n\t" \
00324         "paddsw  %%"#mm"6,  %%"#mm"7 \n\t" \
00325         #mov"      48(%0),  %%"#mm"1 \n\t" \
00326         "psllw  $"S(SHIFT_FRW_COL)"+1, %%"#mm"3 \n\t" \
00327         "psubsw    64(%0),  %%"#mm"1 \n\t" \
00328         #mov"    %%"#mm"2,  %%"#mm"6 \n\t" \
00329         #mov"    %%"#mm"4,    64(%3) \n\t" \
00330         "paddsw  %%"#mm"3,  %%"#mm"2 \n\t" \
00331         "pmulhw      (%4),  %%"#mm"2 \n\t" \
00332         "psubsw  %%"#mm"3,  %%"#mm"6 \n\t" \
00333         "pmulhw      (%4),  %%"#mm"6 \n\t" \
00334         "psubsw  %%"#mm"0,  %%"#mm"5 \n\t" \
00335         "por         (%2),  %%"#mm"5 \n\t" \
00336         "psllw  $"S(SHIFT_FRW_COL)", %%"#mm"1 \n\t" \
00337         "por         (%2),  %%"#mm"2 \n\t" \
00338         #mov"    %%"#mm"1,  %%"#mm"4 \n\t" \
00339         #mov"        (%0),  %%"#mm"3 \n\t" \
00340         "paddsw  %%"#mm"6,  %%"#mm"1 \n\t" \
00341         "psubsw   112(%0),  %%"#mm"3 \n\t" \
00342         "psubsw  %%"#mm"6,  %%"#mm"4 \n\t" \
00343         #mov"        (%1),  %%"#mm"0 \n\t" \
00344         "psllw  $"S(SHIFT_FRW_COL)", %%"#mm"3 \n\t" \
00345         #mov"      32(%1),  %%"#mm"6 \n\t" \
00346         "pmulhw  %%"#mm"1,  %%"#mm"0 \n\t" \
00347         #mov"    %%"#mm"7,      (%3) \n\t" \
00348         "pmulhw  %%"#mm"4,  %%"#mm"6 \n\t" \
00349         #mov"    %%"#mm"5,    96(%3) \n\t" \
00350         #mov"    %%"#mm"3,  %%"#mm"7 \n\t" \
00351         #mov"      32(%1),  %%"#mm"5 \n\t" \
00352         "psubsw  %%"#mm"2,  %%"#mm"7 \n\t" \
00353         "paddsw  %%"#mm"2,  %%"#mm"3 \n\t" \
00354         "pmulhw  %%"#mm"7,  %%"#mm"5 \n\t" \
00355         "paddsw  %%"#mm"3,  %%"#mm"0 \n\t" \
00356         "paddsw  %%"#mm"4,  %%"#mm"6 \n\t" \
00357         "pmulhw      (%1),  %%"#mm"3 \n\t" \
00358         "por         (%2),  %%"#mm"0 \n\t" \
00359         "paddsw  %%"#mm"7,  %%"#mm"5 \n\t" \
00360         "psubsw  %%"#mm"6,  %%"#mm"7 \n\t" \
00361         #mov"    %%"#mm"0,    16(%3) \n\t" \
00362         "paddsw  %%"#mm"4,  %%"#mm"5 \n\t" \
00363         #mov"    %%"#mm"7,    48(%3) \n\t" \
00364         "psubsw  %%"#mm"1,  %%"#mm"3 \n\t" \
00365         #mov"    %%"#mm"5,    80(%3) \n\t" \
00366         #mov"    %%"#mm"3,   112(%3) \n\t" \
00367         : \
00368         : "r" (in  + offset), "r" (fdct_tg_all_16), "r" (fdct_one_corr), \
00369           "r" (out + offset), "r" (ocos_4_16)); \
00370 }
00371 
00372 FDCT_COL(mmx, mm, movq)
00373 FDCT_COL(sse2, xmm, movdqa)
00374 
00375 static av_always_inline void fdct_row_sse2(const int16_t *in, int16_t *out)
00376 {
00377     __asm__ volatile(
00378 #define FDCT_ROW_SSE2_H1(i,t)                    \
00379         "movq      " #i "(%0), %%xmm2      \n\t" \
00380         "movq      " #i "+8(%0), %%xmm0    \n\t" \
00381         "movdqa    " #t "+32(%1), %%xmm3   \n\t" \
00382         "movdqa    " #t "+48(%1), %%xmm7   \n\t" \
00383         "movdqa    " #t "(%1), %%xmm4      \n\t" \
00384         "movdqa    " #t "+16(%1), %%xmm5   \n\t"
00385 
00386 #define FDCT_ROW_SSE2_H2(i,t)                    \
00387         "movq      " #i "(%0), %%xmm2      \n\t" \
00388         "movq      " #i "+8(%0), %%xmm0    \n\t" \
00389         "movdqa    " #t "+32(%1), %%xmm3   \n\t" \
00390         "movdqa    " #t "+48(%1), %%xmm7   \n\t"
00391 
00392 #define FDCT_ROW_SSE2(i)                      \
00393         "movq      %%xmm2, %%xmm1       \n\t" \
00394         "pshuflw   $27, %%xmm0, %%xmm0  \n\t" \
00395         "paddsw    %%xmm0, %%xmm1       \n\t" \
00396         "psubsw    %%xmm0, %%xmm2       \n\t" \
00397         "punpckldq %%xmm2, %%xmm1       \n\t" \
00398         "pshufd    $78, %%xmm1, %%xmm2  \n\t" \
00399         "pmaddwd   %%xmm2, %%xmm3       \n\t" \
00400         "pmaddwd   %%xmm1, %%xmm7       \n\t" \
00401         "pmaddwd   %%xmm5, %%xmm2       \n\t" \
00402         "pmaddwd   %%xmm4, %%xmm1       \n\t" \
00403         "paddd     %%xmm7, %%xmm3       \n\t" \
00404         "paddd     %%xmm2, %%xmm1       \n\t" \
00405         "paddd     %%xmm6, %%xmm3       \n\t" \
00406         "paddd     %%xmm6, %%xmm1       \n\t" \
00407         "psrad     %3, %%xmm3           \n\t" \
00408         "psrad     %3, %%xmm1           \n\t" \
00409         "packssdw  %%xmm3, %%xmm1       \n\t" \
00410         "movdqa    %%xmm1, " #i "(%4)   \n\t"
00411 
00412         "movdqa    (%2), %%xmm6         \n\t"
00413         FDCT_ROW_SSE2_H1(0,0)
00414         FDCT_ROW_SSE2(0)
00415         FDCT_ROW_SSE2_H2(64,0)
00416         FDCT_ROW_SSE2(64)
00417 
00418         FDCT_ROW_SSE2_H1(16,64)
00419         FDCT_ROW_SSE2(16)
00420         FDCT_ROW_SSE2_H2(112,64)
00421         FDCT_ROW_SSE2(112)
00422 
00423         FDCT_ROW_SSE2_H1(32,128)
00424         FDCT_ROW_SSE2(32)
00425         FDCT_ROW_SSE2_H2(96,128)
00426         FDCT_ROW_SSE2(96)
00427 
00428         FDCT_ROW_SSE2_H1(48,192)
00429         FDCT_ROW_SSE2(48)
00430         FDCT_ROW_SSE2_H2(80,192)
00431         FDCT_ROW_SSE2(80)
00432         :
00433         : "r" (in), "r" (tab_frw_01234567_sse2.tab_frw_01234567_sse2), "r" (fdct_r_row_sse2.fdct_r_row_sse2), "i" (SHIFT_FRW_ROW), "r" (out)
00434     );
00435 }
00436 
00437 static av_always_inline void fdct_row_mmx2(const int16_t *in, int16_t *out, const int16_t *table)
00438 {
00439     __asm__ volatile (
00440         "pshufw    $0x1B, 8(%0), %%mm5 \n\t"
00441         "movq       (%0), %%mm0 \n\t"
00442         "movq      %%mm0, %%mm1 \n\t"
00443         "paddsw    %%mm5, %%mm0 \n\t"
00444         "psubsw    %%mm5, %%mm1 \n\t"
00445         "movq      %%mm0, %%mm2 \n\t"
00446         "punpckldq %%mm1, %%mm0 \n\t"
00447         "punpckhdq %%mm1, %%mm2 \n\t"
00448         "movq       (%1), %%mm1 \n\t"
00449         "movq      8(%1), %%mm3 \n\t"
00450         "movq     16(%1), %%mm4 \n\t"
00451         "movq     24(%1), %%mm5 \n\t"
00452         "movq     32(%1), %%mm6 \n\t"
00453         "movq     40(%1), %%mm7 \n\t"
00454         "pmaddwd   %%mm0, %%mm1 \n\t"
00455         "pmaddwd   %%mm2, %%mm3 \n\t"
00456         "pmaddwd   %%mm0, %%mm4 \n\t"
00457         "pmaddwd   %%mm2, %%mm5 \n\t"
00458         "pmaddwd   %%mm0, %%mm6 \n\t"
00459         "pmaddwd   %%mm2, %%mm7 \n\t"
00460         "pmaddwd  48(%1), %%mm0 \n\t"
00461         "pmaddwd  56(%1), %%mm2 \n\t"
00462         "paddd     %%mm1, %%mm3 \n\t"
00463         "paddd     %%mm4, %%mm5 \n\t"
00464         "paddd     %%mm6, %%mm7 \n\t"
00465         "paddd     %%mm0, %%mm2 \n\t"
00466         "movq       (%2), %%mm0 \n\t"
00467         "paddd     %%mm0, %%mm3 \n\t"
00468         "paddd     %%mm0, %%mm5 \n\t"
00469         "paddd     %%mm0, %%mm7 \n\t"
00470         "paddd     %%mm0, %%mm2 \n\t"
00471         "psrad $"S(SHIFT_FRW_ROW)", %%mm3 \n\t"
00472         "psrad $"S(SHIFT_FRW_ROW)", %%mm5 \n\t"
00473         "psrad $"S(SHIFT_FRW_ROW)", %%mm7 \n\t"
00474         "psrad $"S(SHIFT_FRW_ROW)", %%mm2 \n\t"
00475         "packssdw  %%mm5, %%mm3 \n\t"
00476         "packssdw  %%mm2, %%mm7 \n\t"
00477         "movq      %%mm3,  (%3) \n\t"
00478         "movq      %%mm7, 8(%3) \n\t"
00479         :
00480         : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out));
00481 }
00482 
00483 static av_always_inline void fdct_row_mmx(const int16_t *in, int16_t *out, const int16_t *table)
00484 {
00485     //FIXME reorder (I do not have an old MMX-only CPU here to benchmark ...)
00486     __asm__ volatile(
00487         "movd     12(%0), %%mm1 \n\t"
00488         "punpcklwd 8(%0), %%mm1 \n\t"
00489         "movq      %%mm1, %%mm2 \n\t"
00490         "psrlq     $0x20, %%mm1 \n\t"
00491         "movq      0(%0), %%mm0 \n\t"
00492         "punpcklwd %%mm2, %%mm1 \n\t"
00493         "movq      %%mm0, %%mm5 \n\t"
00494         "paddsw    %%mm1, %%mm0 \n\t"
00495         "psubsw    %%mm1, %%mm5 \n\t"
00496         "movq      %%mm0, %%mm2 \n\t"
00497         "punpckldq %%mm5, %%mm0 \n\t"
00498         "punpckhdq %%mm5, %%mm2 \n\t"
00499         "movq      0(%1), %%mm1 \n\t"
00500         "movq      8(%1), %%mm3 \n\t"
00501         "movq     16(%1), %%mm4 \n\t"
00502         "movq     24(%1), %%mm5 \n\t"
00503         "movq     32(%1), %%mm6 \n\t"
00504         "movq     40(%1), %%mm7 \n\t"
00505         "pmaddwd   %%mm0, %%mm1 \n\t"
00506         "pmaddwd   %%mm2, %%mm3 \n\t"
00507         "pmaddwd   %%mm0, %%mm4 \n\t"
00508         "pmaddwd   %%mm2, %%mm5 \n\t"
00509         "pmaddwd   %%mm0, %%mm6 \n\t"
00510         "pmaddwd   %%mm2, %%mm7 \n\t"
00511         "pmaddwd  48(%1), %%mm0 \n\t"
00512         "pmaddwd  56(%1), %%mm2 \n\t"
00513         "paddd     %%mm1, %%mm3 \n\t"
00514         "paddd     %%mm4, %%mm5 \n\t"
00515         "paddd     %%mm6, %%mm7 \n\t"
00516         "paddd     %%mm0, %%mm2 \n\t"
00517         "movq       (%2), %%mm0 \n\t"
00518         "paddd     %%mm0, %%mm3 \n\t"
00519         "paddd     %%mm0, %%mm5 \n\t"
00520         "paddd     %%mm0, %%mm7 \n\t"
00521         "paddd     %%mm0, %%mm2 \n\t"
00522         "psrad $"S(SHIFT_FRW_ROW)", %%mm3 \n\t"
00523         "psrad $"S(SHIFT_FRW_ROW)", %%mm5 \n\t"
00524         "psrad $"S(SHIFT_FRW_ROW)", %%mm7 \n\t"
00525         "psrad $"S(SHIFT_FRW_ROW)", %%mm2 \n\t"
00526         "packssdw  %%mm5, %%mm3 \n\t"
00527         "packssdw  %%mm2, %%mm7 \n\t"
00528         "movq      %%mm3, 0(%3) \n\t"
00529         "movq      %%mm7, 8(%3) \n\t"
00530         :
00531         : "r" (in), "r" (table), "r" (fdct_r_row), "r" (out));
00532 }
00533 
00534 void ff_fdct_mmx(int16_t *block)
00535 {
00536     DECLARE_ALIGNED(8, int64_t, align_tmp)[16];
00537     int16_t * block1= (int16_t*)align_tmp;
00538     const int16_t *table= tab_frw_01234567;
00539     int i;
00540 
00541     fdct_col_mmx(block, block1, 0);
00542     fdct_col_mmx(block, block1, 4);
00543 
00544     for(i=8;i>0;i--) {
00545         fdct_row_mmx(block1, block, table);
00546         block1 += 8;
00547         table += 32;
00548         block += 8;
00549     }
00550 }
00551 
00552 void ff_fdct_mmx2(int16_t *block)
00553 {
00554     DECLARE_ALIGNED(8, int64_t, align_tmp)[16];
00555     int16_t *block1= (int16_t*)align_tmp;
00556     const int16_t *table= tab_frw_01234567;
00557     int i;
00558 
00559     fdct_col_mmx(block, block1, 0);
00560     fdct_col_mmx(block, block1, 4);
00561 
00562     for(i=8;i>0;i--) {
00563         fdct_row_mmx2(block1, block, table);
00564         block1 += 8;
00565         table += 32;
00566         block += 8;
00567     }
00568 }
00569 
00570 void ff_fdct_sse2(int16_t *block)
00571 {
00572     DECLARE_ALIGNED(16, int64_t, align_tmp)[16];
00573     int16_t * const block1= (int16_t*)align_tmp;
00574 
00575     fdct_col_sse2(block, block1, 0);
00576     fdct_row_sse2(block1, block);
00577 }
00578
libavcodec/x86/fdct_mmx.c
