www.pudn.com > ffmpeg_src2007.rar > mpegvideo_iwmmxt.c

#include "../dsputil.h" 
#include "../mpegvideo.h" 
#include "../avcodec.h" 
 
static void dct_unquantize_h263_intra_iwmmxt(MpegEncContext *s, 
                                             DCTELEM *block, int n, int qscale) 
{ 
    int level, qmul, qadd; 
    int nCoeffs; 
    DCTELEM *block_orig = block; 
 
    assert(s->block_last_index[n]>=0); 
 
    qmul = qscale << 1; 
 
    if (!s->h263_aic) { 
        if (n < 4) 
            level = block[0] * s->y_dc_scale; 
        else 
            level = block[0] * s->c_dc_scale; 
        qadd = (qscale - 1) | 1; 
    }else{ 
        qadd = 0; 
        level = block[0]; 
    } 
    if(s->ac_pred) 
        nCoeffs=63; 
    else 
        nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; 
 
    __asm__ __volatile__ ( 
/*      "movd %1, %%mm6                 \n\t" //qmul */ 
/*      "packssdw %%mm6, %%mm6          \n\t" */ 
/*      "packssdw %%mm6, %%mm6          \n\t" */ 
        "tbcsth wr6, %[qmul]            \n\t" 
/*      "movd %2, %%mm5                 \n\t" //qadd */ 
/*      "packssdw %%mm5, %%mm5          \n\t" */ 
/*      "packssdw %%mm5, %%mm5          \n\t" */ 
        "tbcsth wr5, %[qadd]            \n\t" 
        "wzero wr7                      \n\t" /* "pxor %%mm7, %%mm7             \n\t" */ 
        "wzero wr4                      \n\t" /* "pxor %%mm4, %%mm4             \n\t" */ 
        "wsubh wr7, wr5, wr7            \n\t" /* "psubw %%mm5, %%mm7            \n\t" */ 
        "1:                             \n\t" 
        "wldrd wr2, [%[block]]          \n\t" /* "movq (%0, %3), %%mm0          \n\t" */ 
        "wldrd wr3, [%[block], #8]      \n\t" /* "movq 8(%0, %3), %%mm1         \n\t" */ 
        "wmulsl wr0, wr6, wr2           \n\t" /* "pmullw %%mm6, %%mm0           \n\t" */ 
        "wmulsl wr1, wr6, wr3           \n\t" /* "pmullw %%mm6, %%mm1           \n\t" */ 
/*      "movq (%0, %3), %%mm2           \n\t" */ 
/*      "movq 8(%0, %3), %%mm3          \n\t" */ 
        "wcmpgtsh wr2, wr4, wr2         \n\t" /* "pcmpgtw %%mm4, %%mm2          \n\t" // block[i] < 0 ? -1 : 0 */ 
        "wcmpgtsh wr3, wr4, wr2         \n\t" /* "pcmpgtw %%mm4, %%mm3          \n\t" // block[i] < 0 ? -1 : 0 */ 
        "wxor wr0, wr2, wr0             \n\t" /* "pxor %%mm2, %%mm0             \n\t" */ 
        "wxor wr1, wr3, wr1             \n\t" /* "pxor %%mm3, %%mm1             \n\t" */ 
        "waddh wr0, wr7, wr0            \n\t" /* "paddw %%mm7, %%mm0            \n\t" */ 
        "waddh wr1, wr7, wr1            \n\t" /* "paddw %%mm7, %%mm1            \n\t" */ 
        "wxor wr2, wr0, wr2             \n\t" /* "pxor %%mm0, %%mm2             \n\t" */ 
        "wxor wr3, wr1, wr3             \n\t" /* "pxor %%mm1, %%mm3             \n\t" */ 
        "wcmpeqh wr0, wr7, wr0          \n\t" /* "pcmpeqw %%mm7, %%mm0          \n\t" // block[i] == 0 ? -1 : 0 */ 
        "wcmpeqh wr1, wr7, wr1          \n\t" /* "pcmpeqw %%mm7, %%mm1          \n\t" // block[i] == 0 ? -1 : 0 */ 
        "wandn wr0, wr2, wr0            \n\t" /* "pandn %%mm2, %%mm0            \n\t" */ 
        "wandn wr1, wr3, wr1            \n\t" /* "pandn %%mm3, %%mm1            \n\t" */ 
        "wstrd wr0, [%[block]]          \n\t" /* "movq %%mm0, (%0, %3)          \n\t" */ 
        "wstrd wr1, [%[block], #8]      \n\t" /* "movq %%mm1, 8(%0, %3)         \n\t" */ 
        "add %[block], %[block], #16    \n\t" /* "addl $16, %3                  \n\t" */ 
        "subs %[i], %[i], #1            \n\t" 
        "bne 1b                         \n\t" /* "jng 1b                                \n\t" */ 
        :[block]"+r"(block) 
        :[i]"r"((nCoeffs + 8) / 8), [qmul]"r"(qmul), [qadd]"r"(qadd) 
        :"memory"); 
 
    block_orig[0] = level; 
} 
 
#if 0 
static void dct_unquantize_h263_inter_iwmmxt(MpegEncContext *s, 
                                             DCTELEM *block, int n, int qscale) 
{ 
    int nCoeffs; 
 
    assert(s->block_last_index[n]>=0); 
 
    if(s->ac_pred) 
        nCoeffs=63; 
    else 
        nCoeffs= s->inter_scantable.raster_end[ s->block_last_index[n] ]; 
 
    ippiQuantInvInter_Compact_H263_16s_I(block, nCoeffs+1, qscale); 
} 
#endif 
 
void MPV_common_init_iwmmxt(MpegEncContext *s) 
{ 
    if (!(mm_flags & MM_IWMMXT)) return; 
 
    s->dct_unquantize_h263_intra = dct_unquantize_h263_intra_iwmmxt; 
#if 0 
    s->dct_unquantize_h263_inter = dct_unquantize_h263_inter_iwmmxt; 
#endif 
}