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pcg |
1.1 |
void RTjpeg_quant_init(void) |
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{ |
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int i; |
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s16 *qtbl; |
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qtbl=(s16 *)RTjpeg_lqt; |
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for(i=0; i<64; i++)qtbl[i]=(s16)RTjpeg_lqt[i]; |
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qtbl=(s16 *)RTjpeg_cqt; |
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for(i=0; i<64; i++)qtbl[i]=(s16)RTjpeg_cqt[i]; |
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} |
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static mmx_t RTjpeg_ones=(mmx_t)(long long)0x0001000100010001LL; |
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static mmx_t RTjpeg_half=(mmx_t)(long long)0x7fff7fff7fff7fffLL; |
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void RTjpeg_quant(s16 *block, s32 *qtbl) |
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{ |
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int i; |
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mmx_t *bl, *ql; |
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ql=(mmx_t *)qtbl; |
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bl=(mmx_t *)block; |
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movq_m2r(RTjpeg_ones, mm6); |
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movq_m2r(RTjpeg_half, mm7); |
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for(i=0; i<16; i++) |
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{ |
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movq_m2r(*ql, mm0); /* quant vals (4) */ |
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movq_m2r(*bl, mm2); /* block vals (4) */ |
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movq_r2r(mm0, mm1); |
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movq_r2r(mm2, mm3); |
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punpcklwd_r2r(mm6, mm0); /* 1 qb 1 qa */ |
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punpckhwd_r2r(mm6, mm1); /* 1 qd 1 qc */ |
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punpcklwd_r2r(mm7, mm2); /* 32767 bb 32767 ba */ |
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punpckhwd_r2r(mm7, mm3); /* 32767 bd 32767 bc */ |
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pmaddwd_r2r(mm2, mm0); /* 32767+bb*qb 32767+ba*qa */ |
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pmaddwd_r2r(mm3, mm1); /* 32767+bd*qd 32767+bc*qc */ |
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psrad_i2r((mmx_t)(long long)16, mm0); |
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psrad_i2r((mmx_t)(long long)16, mm1); |
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packssdw_r2r(mm1, mm0); |
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movq_r2m(mm0, *bl); |
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bl++; |
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ql++; |
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} |
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} |
