"divw %%bx		\n\t"
"divw %%cx		\n\t"
static int RENAME(dct_quantize)(MpegEncContext *s,                            DCTELEM *block, int n,                            int qscale){    int i, level, last_non_zero_p1, q;    const UINT16 *qmat;    static __align8 INT16 temp_block[64];    int minLevel, maxLevel;        if(s->avctx!=NULL && s->avctx->codec->id==CODEC_ID_MPEG4){	/* mpeg4 */        minLevel= -2048;	maxLevel= 2047;    }else if(s->out_format==FMT_MPEG1){	/* mpeg1 */        minLevel= -255;	maxLevel= 255;    }else{	/* h263 / msmpeg4 */        minLevel= -128;	maxLevel= 127;    }    av_fdct (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 1	asm volatile (		"xorl %%edx, %%edx	\n\t"		"mul %%ebx		\n\t"		: "=d" (temp_block[0]), "=a"(dummy)		: "a" (block[0] + (q >> 1)), "b" (inverse[q])	);#else	asm volatile (		"xorl %%edx, %%edx	\n\t"		"divw %%bx		\n\t"		"movzwl %%ax, %%eax	\n\t"		: "=a" (temp_block[0])		: "a" (block[0] + (q >> 1)), "b" (q)		: "%edx"	);#endif//        temp_block[0] = (block[0] + (q >> 1)) / q;        i = 1;        last_non_zero_p1 = 1;        if (s->out_format == FMT_H263) {            qmat = s->q_non_intra_matrix16;        } else {            qmat = s->q_intra_matrix16;        }        for(i=1;i<4;i++) {            level = block[i] * qmat[i];            level = level / (1 << (QMAT_SHIFT_MMX - 3));            /* XXX: currently, this code is not optimal. the range should be:               mpeg1: -255..255               mpeg2: -2048..2047               h263:  -128..127               mpeg4: -2048..2047            */            if (level > maxLevel)                level = maxLevel;            else if (level < minLevel)                level = minLevel;            temp_block[i] = level;	    if(level) 	        if(last_non_zero_p1 < inv_zigzag_direct16[i]) last_non_zero_p1= inv_zigzag_direct16[i];	    block[i]=0;        }    } else {        i = 0;        last_non_zero_p1 = 0;        qmat = s->q_non_intra_matrix16;    }    asm volatile( /* XXX: small rounding bug, but it shouldnt matter */	"movd %3, %%mm3			\n\t"	SPREADW(%%mm3)	"movd %4, %%mm4			\n\t"	SPREADW(%%mm4)	"movd %5, %%mm5			\n\t"	SPREADW(%%mm5)	"pxor %%mm7, %%mm7		\n\t"	"movd %%eax, %%mm2		\n\t"	SPREADW(%%mm2)	"movl %6, %%eax			\n\t"	".balign 16			\n\t"	"1:				\n\t"	"movq (%1, %%eax), %%mm0	\n\t"	"movq (%2, %%eax), %%mm1	\n\t"	"movq %%mm0, %%mm6		\n\t"	"psraw $15, %%mm6		\n\t"	"pmulhw %%mm0, %%mm1		\n\t"	"psubsw %%mm6, %%mm1		\n\t"#ifdef HAVE_MMX2	"pminsw %%mm3, %%mm1		\n\t"	"pmaxsw %%mm4, %%mm1		\n\t"#else	"paddsw %%mm3, %%mm1		\n\t"	"psubusw %%mm4, %%mm1		\n\t"	"paddsw %%mm5, %%mm1		\n\t"#endif	"movq %%mm1, (%8, %%eax)	\n\t"	"pcmpeqw %%mm7, %%mm1		\n\t"	"movq (%7, %%eax), %%mm0	\n\t"	"movq %%mm7, (%1, %%eax)	\n\t"	"pandn %%mm0, %%mm1		\n\t"	PMAXW(%%mm1, %%mm2)	"addl $8, %%eax			\n\t"	" js 1b				\n\t"	"movq %%mm2, %%mm0		\n\t"	"psrlq $32, %%mm2		\n\t"	PMAXW(%%mm0, %%mm2)	"movq %%mm2, %%mm0		\n\t"	"psrlq $16, %%mm2		\n\t"	PMAXW(%%mm0, %%mm2)	"movd %%mm2, %%eax		\n\t"	"movzbl %%al, %%eax		\n\t"	: "+a" (last_non_zero_p1)	: "r" (block+64), "r" (qmat+64), #ifdef HAVE_MMX2	  "m" (maxLevel),          "m" (minLevel),                    "m" (0 /* dummy */), "g" (2*i - 128),#else	  "m" (0x7FFF - maxLevel), "m" (0x7FFF -maxLevel + minLevel), "m" (minLevel),      "g" (2*i - 128),#endif	  "r" (inv_zigzag_direct16+64), "r" (temp_block+64)    );// last_non_zero_p1=64;           /* permute for IDCT */    asm volatile(	"movl %0, %%eax			\n\t"	"pushl %%ebp			\n\t"	"movl %%esp, " MANGLE(esp_temp) "\n\t"	"1:				\n\t"	"movzbl (%1, %%eax), %%ebx	\n\t"	"movzbl 1(%1, %%eax), %%ebp	\n\t"	"movw (%2, %%ebx, 2), %%cx	\n\t"	"movw (%2, %%ebp, 2), %%sp	\n\t"	"movzbl " MANGLE(permutation) "(%%ebx), %%ebx\n\t"	"movzbl " MANGLE(permutation) "(%%ebp), %%ebp\n\t"	"movw %%cx, (%3, %%ebx, 2)	\n\t"	"movw %%sp, (%3, %%ebp, 2)	\n\t"	"addl $2, %%eax			\n\t"	" js 1b				\n\t"	"movl " MANGLE(esp_temp) ", %%esp\n\t"	"popl %%ebp			\n\t"	: 	: "g" (-last_non_zero_p1), "d" (zigzag_direct_noperm+last_non_zero_p1), "S" (temp_block), "D" (block)	: "%eax", "%ebx", "%ecx"	);/*    for(i=0; i<last_non_zero_p1; i++)    {       int j= zigzag_direct_noperm[i];       block[block_permute_op(j)]= temp_block[j];    }*///block_permute(block);    return last_non_zero_p1 - 1;}