C++ (Cpp) VEC_LOAD_U8_ADD_S16_STORE_U8 Exemples

Exemple #1

Fichier : h264_idtc2_vmx.c Projet : CodeAsm/ffplay360

static void ff_h264_idct_add_altivec(uint8_t *dst, DCTELEM *block, int stride)
{
    vec_s16 va0, va1, va2, va3;//s16
    vec_s16 vz0, vz1, vz2, vz3;//s16
    vec_s16 vtmp0, vtmp1, vtmp2, vtmp3;//s16
    vec_u8 va_u8;//u8
    vec_u32 va_u32;//u32
    vec_s16 vdst_ss;//s16
    const vec_u16 v6us = __vsplth(6);//u16
    vec_u8 vdst, vdst_orig;//u8
    vec_u8 vdst_mask = __lvsl(dst,0);//u8
    int element = ((unsigned long)dst & 0xf) >> 2;
    LOAD_ZERO;

    block[0] += 32;  /* add 32 as a DC-level for rounding */

    vtmp0 = __lvx(block,0);
    vtmp1 = __vsldoi(vtmp0, vtmp0, 8);
    vtmp2 = __lvx(block,16);
    vtmp3 = __vsldoi(vtmp2, vtmp2, 8);

    VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
    VEC_TRANSPOSE_4(va0,va1,va2,va3,vtmp0,vtmp1,vtmp2,vtmp3);
    VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);

    va0 = __vsrah(va0,v6us);
    va1 = __vsrah(va1,v6us);
    va2 = __vsrah(va2,v6us);
    va3 = __vsrah(va3,v6us);

    VEC_LOAD_U8_ADD_S16_STORE_U8(va0);
    dst += stride;
    VEC_LOAD_U8_ADD_S16_STORE_U8(va1);
    dst += stride;
    VEC_LOAD_U8_ADD_S16_STORE_U8(va2);
    dst += stride;
    VEC_LOAD_U8_ADD_S16_STORE_U8(va3);
}

Exemple #2

Fichier : h264_altivec.c Projet : 119/dropcam_for_iphone

static void ff_h264_idct_add_altivec(uint8_t *dst, DCTELEM *block, int stride)
{
    vec_s16 va0, va1, va2, va3;
    vec_s16 vz0, vz1, vz2, vz3;
    vec_s16 vtmp0, vtmp1, vtmp2, vtmp3;
    vec_u8 va_u8;
    vec_u32 va_u32;
    vec_s16 vdst_ss;
    const vec_u16 v6us = vec_splat_u16(6);
    vec_u8 vdst, vdst_orig;
    vec_u8 vdst_mask = vec_lvsl(0, dst);
    int element = ((unsigned long)dst & 0xf) >> 2;
    LOAD_ZERO;

    block[0] += 32;  /* add 32 as a DC-level for rounding */

    vtmp0 = vec_ld(0,block);
    vtmp1 = vec_sld(vtmp0, vtmp0, 8);
    vtmp2 = vec_ld(16,block);
    vtmp3 = vec_sld(vtmp2, vtmp2, 8);

    VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);
    VEC_TRANSPOSE_4(va0,va1,va2,va3,vtmp0,vtmp1,vtmp2,vtmp3);
    VEC_1D_DCT(vtmp0,vtmp1,vtmp2,vtmp3,va0,va1,va2,va3);

    va0 = vec_sra(va0,v6us);
    va1 = vec_sra(va1,v6us);
    va2 = vec_sra(va2,v6us);
    va3 = vec_sra(va3,v6us);

    VEC_LOAD_U8_ADD_S16_STORE_U8(va0);
    dst += stride;
    VEC_LOAD_U8_ADD_S16_STORE_U8(va1);
    dst += stride;
    VEC_LOAD_U8_ADD_S16_STORE_U8(va2);
    dst += stride;
    VEC_LOAD_U8_ADD_S16_STORE_U8(va3);
}