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dec_neon: add VE4 intra predictor

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based on SSE2 version, ~59% faster

Change-Id: Iaa2181eb51bd975de0e9fe5c7b66ed18188f0e3b
This commit is contained in:
James Zern 2014-10-21 18:06:08 +02:00
parent b7a33d7e91
commit 32de385eca
1 changed files with 21 additions and 0 deletions
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21
src/dsp/dec_neon.c
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@ -1258,6 +1258,25 @@ static void TransformAC3(const int16_t* in, uint8_t* dst) {
}
#undef MUL
//------------------------------------------------------------------------------
// 4x4
static void VE4(uint8_t* dst) { // vertical
// NB: avoid vld1_u64 here as an alignment hint may be added -> SIGBUS.
const uint64x1_t A0 = vreinterpret_u64_u8(vld1_u8(dst - BPS - 1)); // top row
const uint64x1_t A1 = vshr_n_u64(A0, 8);
const uint64x1_t A2 = vshr_n_u64(A0, 16);
const uint8x8_t ABCDEFG = vreinterpret_u8_u64(A0);
const uint8x8_t BCDEFG_ = vreinterpret_u8_u64(A1);
const uint8x8_t CDEFG__ = vreinterpret_u8_u64(A2);
const uint8x8_t b = vhadd_u8(ABCDEFG, CDEFG__);
const uint8x8_t avg = vrhadd_u8(b, BCDEFG_);
int i;
for (i = 0; i < 4; ++i) {
vst1_lane_u32((uint32_t*)(dst + i * BPS), vreinterpret_u32_u8(avg), 0);
}
}
#endif // WEBP_USE_NEON
//------------------------------------------------------------------------------
@ -1288,5 +1307,7 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitNEON(void) {
VP8SimpleHFilter16 = SimpleHFilter16;
VP8SimpleVFilter16i = SimpleVFilter16i;
VP8SimpleHFilter16i = SimpleHFilter16i;
VP8PredLuma4[2] = VE4;
#endif // WEBP_USE_NEON
}