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ffmpeg/libavcodec/i386/mpegvideo_mmx_template.c
Michael Niedermayer 12e9668119 replace a few mov + psrlq with pshufw, there are more cases which could benefit from this but they would require us to duplicate some functions ... 
the trick is from various places (my own code in libpostproc, a patch on the x264 list, ...)

Originally committed as revision 4608 to svn://svn.ffmpeg.org/ffmpeg/trunk
2005-09-21 21:17:09 +00:00

346 lines
16 KiB
C
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/*
* MPEG video MMX templates
*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#undef SPREADW
#undef PMAXW
#ifdef HAVE_MMX2
#define SPREADW(a) "pshufw $0, " #a ", " #a " \n\t"
#define PMAXW(a,b) "pmaxsw " #a ", " #b " \n\t"
#define PMAX(a,b) \
"pshufw $0x0E," #a ", " #b " \n\t"\
PMAXW(b, a)\
"pshufw $0x01," #a ", " #b " \n\t"\
PMAXW(b, a)
#else
#define SPREADW(a) \
"punpcklwd " #a ", " #a " \n\t"\
"punpcklwd " #a ", " #a " \n\t"
#define PMAXW(a,b) \
"psubusw " #a ", " #b " \n\t"\
"paddw " #a ", " #b " \n\t"
#define PMAX(a,b) \
"movq " #a ", " #b " \n\t"\
"psrlq $32, " #a " \n\t"\
PMAXW(b, a)\
"movq " #a ", " #b " \n\t"\
"psrlq $16, " #a " \n\t"\
PMAXW(b, a)
#endif
static int RENAME(dct_quantize)(MpegEncContext *s,
DCTELEM *block, int n,
int qscale, int *overflow)
{
long last_non_zero_p1;
int level=0, q; //=0 is cuz gcc says uninitalized ...
const uint16_t *qmat, *bias;
__align8 int16_t temp_block[64];
assert((7&(int)(&temp_block[0])) == 0); //did gcc align it correctly?
//s->fdct (block);
RENAMEl(ff_fdct) (block); //cant be anything else ...
if(s->dct_error_sum)
s->denoise_dct(s, block);
if (s->mb_intra) {
int dummy;
if (n < 4)
q = s->y_dc_scale;
else
q = s->c_dc_scale;
/* note: block[0] is assumed to be positive */
if (!s->h263_aic) {
#if 1
asm volatile (
"mul %%ecx \n\t"
: "=d" (level), "=a"(dummy)
: "a" ((block[0]>>2) + q), "c" (inverse[q<<1])
);
#else
asm volatile (
"xorl %%edx, %%edx \n\t"
"divw %%cx \n\t"
"movzwl %%ax, %%eax \n\t"
: "=a" (level)
: "a" ((block[0]>>2) + q), "c" (q<<1)
: "%edx"
);
#endif
} else
/* For AIC we skip quant/dequant of INTRADC */
level = (block[0] + 4)>>3;
block[0]=0; //avoid fake overflow
// temp_block[0] = (block[0] + (q >> 1)) / q;
last_non_zero_p1 = 1;
bias = s->q_intra_matrix16[qscale][1];
qmat = s->q_intra_matrix16[qscale][0];
} else {
last_non_zero_p1 = 0;
bias = s->q_inter_matrix16[qscale][1];
qmat = s->q_inter_matrix16[qscale][0];
}
if((s->out_format == FMT_H263 || s->out_format == FMT_H261) && s->mpeg_quant==0){
asm volatile(
"movd %%"REG_a", %%mm3 \n\t" // last_non_zero_p1
SPREADW(%%mm3)
"pxor %%mm7, %%mm7 \n\t" // 0
"pxor %%mm4, %%mm4 \n\t" // 0
"movq (%2), %%mm5 \n\t" // qmat[0]
"pxor %%mm6, %%mm6 \n\t"
"psubw (%3), %%mm6 \n\t" // -bias[0]
"mov $-128, %%"REG_a" \n\t"
".balign 16 \n\t"
"1: \n\t"
"pxor %%mm1, %%mm1 \n\t" // 0
"movq (%1, %%"REG_a"), %%mm0 \n\t" // block[i]
"pcmpgtw %%mm0, %%mm1 \n\t" // block[i] <= 0 ? 0xFF : 0x00
"pxor %%mm1, %%mm0 \n\t"
"psubw %%mm1, %%mm0 \n\t" // ABS(block[i])
"psubusw %%mm6, %%mm0 \n\t" // ABS(block[i]) + bias[0]
"pmulhw %%mm5, %%mm0 \n\t" // (ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16
"por %%mm0, %%mm4 \n\t"
"pxor %%mm1, %%mm0 \n\t"
"psubw %%mm1, %%mm0 \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
"movq %%mm0, (%5, %%"REG_a") \n\t"
"pcmpeqw %%mm7, %%mm0 \n\t" // out==0 ? 0xFF : 0x00
"movq (%4, %%"REG_a"), %%mm1 \n\t"
"movq %%mm7, (%1, %%"REG_a") \n\t" // 0
"pandn %%mm1, %%mm0 \n\t"
PMAXW(%%mm0, %%mm3)
"add $8, %%"REG_a" \n\t"
" js 1b \n\t"
PMAX(%%mm3, %%mm0)
"movd %%mm3, %%"REG_a" \n\t"
"movzb %%al, %%"REG_a" \n\t" // last_non_zero_p1
: "+a" (last_non_zero_p1)
: "r" (block+64), "r" (qmat), "r" (bias),
"r" (inv_zigzag_direct16+64), "r" (temp_block+64)
);
// note the asm is split cuz gcc doesnt like that many operands ...
asm volatile(
"movd %1, %%mm1 \n\t" // max_qcoeff
SPREADW(%%mm1)
"psubusw %%mm1, %%mm4 \n\t"
"packuswb %%mm4, %%mm4 \n\t"
"movd %%mm4, %0 \n\t" // *overflow
: "=g" (*overflow)
: "g" (s->max_qcoeff)
);
}else{ // FMT_H263
asm volatile(
"movd %%"REG_a", %%mm3 \n\t" // last_non_zero_p1
SPREADW(%%mm3)
"pxor %%mm7, %%mm7 \n\t" // 0
"pxor %%mm4, %%mm4 \n\t" // 0
"mov $-128, %%"REG_a" \n\t"
".balign 16 \n\t"
"1: \n\t"
"pxor %%mm1, %%mm1 \n\t" // 0
"movq (%1, %%"REG_a"), %%mm0 \n\t" // block[i]
"pcmpgtw %%mm0, %%mm1 \n\t" // block[i] <= 0 ? 0xFF : 0x00
"pxor %%mm1, %%mm0 \n\t"
"psubw %%mm1, %%mm0 \n\t" // ABS(block[i])
"movq (%3, %%"REG_a"), %%mm6 \n\t" // bias[0]
"paddusw %%mm6, %%mm0 \n\t" // ABS(block[i]) + bias[0]
"movq (%2, %%"REG_a"), %%mm5 \n\t" // qmat[i]
"pmulhw %%mm5, %%mm0 \n\t" // (ABS(block[i])*qmat[0] + bias[0]*qmat[0])>>16
"por %%mm0, %%mm4 \n\t"
"pxor %%mm1, %%mm0 \n\t"
"psubw %%mm1, %%mm0 \n\t" // out=((ABS(block[i])*qmat[0] - bias[0]*qmat[0])>>16)*sign(block[i])
"movq %%mm0, (%5, %%"REG_a") \n\t"
"pcmpeqw %%mm7, %%mm0 \n\t" // out==0 ? 0xFF : 0x00
"movq (%4, %%"REG_a"), %%mm1 \n\t"
"movq %%mm7, (%1, %%"REG_a") \n\t" // 0
"pandn %%mm1, %%mm0 \n\t"
PMAXW(%%mm0, %%mm3)
"add $8, %%"REG_a" \n\t"
" js 1b \n\t"
PMAX(%%mm3, %%mm0)
"movd %%mm3, %%"REG_a" \n\t"
"movzb %%al, %%"REG_a" \n\t" // last_non_zero_p1
: "+a" (last_non_zero_p1)
: "r" (block+64), "r" (qmat+64), "r" (bias+64),
"r" (inv_zigzag_direct16+64), "r" (temp_block+64)
);
// note the asm is split cuz gcc doesnt like that many operands ...
asm volatile(
"movd %1, %%mm1 \n\t" // max_qcoeff
SPREADW(%%mm1)
"psubusw %%mm1, %%mm4 \n\t"
"packuswb %%mm4, %%mm4 \n\t"
"movd %%mm4, %0 \n\t" // *overflow
: "=g" (*overflow)
: "g" (s->max_qcoeff)
);
}
if(s->mb_intra) block[0]= level;
else block[0]= temp_block[0];
if(s->dsp.idct_permutation_type == FF_SIMPLE_IDCT_PERM){
if(last_non_zero_p1 <= 1) goto end;
block[0x08] = temp_block[0x01]; block[0x10] = temp_block[0x08];
block[0x20] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x18] = temp_block[0x09]; block[0x04] = temp_block[0x02];
block[0x09] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x14] = temp_block[0x0A]; block[0x28] = temp_block[0x11];
block[0x12] = temp_block[0x18]; block[0x02] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x1A] = temp_block[0x19]; block[0x24] = temp_block[0x12];
block[0x19] = temp_block[0x0B]; block[0x01] = temp_block[0x04];
block[0x0C] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x11] = temp_block[0x0C]; block[0x29] = temp_block[0x13];
block[0x16] = temp_block[0x1A]; block[0x0A] = temp_block[0x21];
block[0x30] = temp_block[0x28]; block[0x22] = temp_block[0x30];
block[0x38] = temp_block[0x29]; block[0x06] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1B] = temp_block[0x1B]; block[0x21] = temp_block[0x14];
block[0x1C] = temp_block[0x0D]; block[0x05] = temp_block[0x06];
block[0x0D] = temp_block[0x07]; block[0x15] = temp_block[0x0E];
block[0x2C] = temp_block[0x15]; block[0x13] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x0B] = temp_block[0x23]; block[0x34] = temp_block[0x2A];
block[0x2A] = temp_block[0x31]; block[0x32] = temp_block[0x38];
block[0x3A] = temp_block[0x39]; block[0x26] = temp_block[0x32];
block[0x39] = temp_block[0x2B]; block[0x03] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x1E] = temp_block[0x1D]; block[0x25] = temp_block[0x16];
block[0x1D] = temp_block[0x0F]; block[0x2D] = temp_block[0x17];
block[0x17] = temp_block[0x1E]; block[0x0E] = temp_block[0x25];
block[0x31] = temp_block[0x2C]; block[0x2B] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x36] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
block[0x23] = temp_block[0x34]; block[0x3C] = temp_block[0x2D];
block[0x07] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
block[0x0F] = temp_block[0x27]; block[0x35] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x2E] = temp_block[0x35]; block[0x33] = temp_block[0x3C];
block[0x3E] = temp_block[0x3D]; block[0x27] = temp_block[0x36];
block[0x3D] = temp_block[0x2F]; block[0x2F] = temp_block[0x37];
block[0x37] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
}else if(s->dsp.idct_permutation_type == FF_LIBMPEG2_IDCT_PERM){
if(last_non_zero_p1 <= 1) goto end;
block[0x04] = temp_block[0x01];
block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x0C] = temp_block[0x09]; block[0x01] = temp_block[0x02];
block[0x05] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x09] = temp_block[0x0A]; block[0x14] = temp_block[0x11];
block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x1C] = temp_block[0x19];
block[0x11] = temp_block[0x12]; block[0x0D] = temp_block[0x0B];
block[0x02] = temp_block[0x04]; block[0x06] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x0A] = temp_block[0x0C]; block[0x15] = temp_block[0x13];
block[0x19] = temp_block[0x1A]; block[0x24] = temp_block[0x21];
block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
block[0x2C] = temp_block[0x29]; block[0x21] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1D] = temp_block[0x1B]; block[0x12] = temp_block[0x14];
block[0x0E] = temp_block[0x0D]; block[0x03] = temp_block[0x06];
block[0x07] = temp_block[0x07]; block[0x0B] = temp_block[0x0E];
block[0x16] = temp_block[0x15]; block[0x1A] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x25] = temp_block[0x23]; block[0x29] = temp_block[0x2A];
block[0x34] = temp_block[0x31]; block[0x38] = temp_block[0x38];
block[0x3C] = temp_block[0x39]; block[0x31] = temp_block[0x32];
block[0x2D] = temp_block[0x2B]; block[0x22] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x1E] = temp_block[0x1D]; block[0x13] = temp_block[0x16];
block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
block[0x1B] = temp_block[0x1E]; block[0x26] = temp_block[0x25];
block[0x2A] = temp_block[0x2C]; block[0x35] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x39] = temp_block[0x3A]; block[0x3D] = temp_block[0x3B];
block[0x32] = temp_block[0x34]; block[0x2E] = temp_block[0x2D];
block[0x23] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
block[0x27] = temp_block[0x27]; block[0x2B] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x36] = temp_block[0x35]; block[0x3A] = temp_block[0x3C];
block[0x3E] = temp_block[0x3D]; block[0x33] = temp_block[0x36];
block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
block[0x3B] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
}else{
if(last_non_zero_p1 <= 1) goto end;
block[0x01] = temp_block[0x01];
block[0x08] = temp_block[0x08]; block[0x10] = temp_block[0x10];
if(last_non_zero_p1 <= 4) goto end;
block[0x09] = temp_block[0x09]; block[0x02] = temp_block[0x02];
block[0x03] = temp_block[0x03];
if(last_non_zero_p1 <= 7) goto end;
block[0x0A] = temp_block[0x0A]; block[0x11] = temp_block[0x11];
block[0x18] = temp_block[0x18]; block[0x20] = temp_block[0x20];
if(last_non_zero_p1 <= 11) goto end;
block[0x19] = temp_block[0x19];
block[0x12] = temp_block[0x12]; block[0x0B] = temp_block[0x0B];
block[0x04] = temp_block[0x04]; block[0x05] = temp_block[0x05];
if(last_non_zero_p1 <= 16) goto end;
block[0x0C] = temp_block[0x0C]; block[0x13] = temp_block[0x13];
block[0x1A] = temp_block[0x1A]; block[0x21] = temp_block[0x21];
block[0x28] = temp_block[0x28]; block[0x30] = temp_block[0x30];
block[0x29] = temp_block[0x29]; block[0x22] = temp_block[0x22];
if(last_non_zero_p1 <= 24) goto end;
block[0x1B] = temp_block[0x1B]; block[0x14] = temp_block[0x14];
block[0x0D] = temp_block[0x0D]; block[0x06] = temp_block[0x06];
block[0x07] = temp_block[0x07]; block[0x0E] = temp_block[0x0E];
block[0x15] = temp_block[0x15]; block[0x1C] = temp_block[0x1C];
if(last_non_zero_p1 <= 32) goto end;
block[0x23] = temp_block[0x23]; block[0x2A] = temp_block[0x2A];
block[0x31] = temp_block[0x31]; block[0x38] = temp_block[0x38];
block[0x39] = temp_block[0x39]; block[0x32] = temp_block[0x32];
block[0x2B] = temp_block[0x2B]; block[0x24] = temp_block[0x24];
if(last_non_zero_p1 <= 40) goto end;
block[0x1D] = temp_block[0x1D]; block[0x16] = temp_block[0x16];
block[0x0F] = temp_block[0x0F]; block[0x17] = temp_block[0x17];
block[0x1E] = temp_block[0x1E]; block[0x25] = temp_block[0x25];
block[0x2C] = temp_block[0x2C]; block[0x33] = temp_block[0x33];
if(last_non_zero_p1 <= 48) goto end;
block[0x3A] = temp_block[0x3A]; block[0x3B] = temp_block[0x3B];
block[0x34] = temp_block[0x34]; block[0x2D] = temp_block[0x2D];
block[0x26] = temp_block[0x26]; block[0x1F] = temp_block[0x1F];
block[0x27] = temp_block[0x27]; block[0x2E] = temp_block[0x2E];
if(last_non_zero_p1 <= 56) goto end;
block[0x35] = temp_block[0x35]; block[0x3C] = temp_block[0x3C];
block[0x3D] = temp_block[0x3D]; block[0x36] = temp_block[0x36];
block[0x2F] = temp_block[0x2F]; block[0x37] = temp_block[0x37];
block[0x3E] = temp_block[0x3E]; block[0x3F] = temp_block[0x3F];
}
end:
/*
for(i=0; i<last_non_zero_p1; i++)
{
int j= zigzag_direct_noperm[i];
block[block_permute_op(j)]= temp_block[j];
}
*/
return last_non_zero_p1 - 1;
}
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