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dec_sse2: remove HE8uv_SSE2

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with gcc-4.8, clang-4.0.1/5 this is no faster (actually up to 2x slower)
than the code generated for memset (0x01010... * dst[-1]). shuffles in
sse4 recover a bit, but performance is still down.

Change-Id: Ie85e8353f8ede559d0b05a1d388787fd18ecc80f
This commit is contained in:
James Zern 2017-11-20 20:34:05 -08:00
parent aebf59ac50
commit b94cee98fb
1 changed files with 0 additions and 10 deletions
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10
src/dsp/dec_sse2.c
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@ -1127,15 +1127,6 @@ static void VE8uv_SSE2(uint8_t* dst) { // vertical
}
}
static void HE8uv_SSE2(uint8_t* dst) { // horizontal
int j;
for (j = 0; j < 8; ++j) {
const __m128i values = _mm_set1_epi8(dst[-1]);
_mm_storel_epi64((__m128i*)dst, values);
dst += BPS;
}
}
// helper for chroma-DC predictions
static WEBP_INLINE void Put8x8uv_SSE2(uint8_t v, uint8_t* dst) {
int j;
@ -1224,7 +1215,6 @@ WEBP_TSAN_IGNORE_FUNCTION void VP8DspInitSSE2(void) {
VP8PredChroma8[0] = DC8uv_SSE2;
VP8PredChroma8[1] = TM8uv_SSE2;
VP8PredChroma8[2] = VE8uv_SSE2;
VP8PredChroma8[3] = HE8uv_SSE2;
VP8PredChroma8[4] = DC8uvNoTop_SSE2;
VP8PredChroma8[5] = DC8uvNoLeft_SSE2;
VP8PredChroma8[6] = DC8uvNoTopLeft_SSE2;