diff options
Diffstat (limited to 'media/libwebp/dsp/rescaler_sse2.c')
| -rw-r--r-- | media/libwebp/dsp/rescaler_sse2.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/media/libwebp/dsp/rescaler_sse2.c b/media/libwebp/dsp/rescaler_sse2.c index 1306f8457..2d35f76ab 100644 --- a/media/libwebp/dsp/rescaler_sse2.c +++ b/media/libwebp/dsp/rescaler_sse2.c @@ -25,6 +25,7 @@ #define ROUNDER (WEBP_RESCALER_ONE >> 1) #define MULT_FIX(x, y) (((uint64_t)(x) * (y) + ROUNDER) >> WEBP_RESCALER_RFIX) +#define MULT_FIX_FLOOR(x, y) (((uint64_t)(x) * (y)) >> WEBP_RESCALER_RFIX) // input: 8 bytes ABCDEFGH -> output: A0E0B0F0C0G0D0H0 static void LoadTwoPixels_SSE2(const uint8_t* const src, __m128i* out) { @@ -224,6 +225,35 @@ static WEBP_INLINE void ProcessRow_SSE2(const __m128i* const A0, _mm_storel_epi64((__m128i*)dst, G); } +static WEBP_INLINE void ProcessRow_Floor_SSE2(const __m128i* const A0, + const __m128i* const A1, + const __m128i* const A2, + const __m128i* const A3, + const __m128i* const mult, + uint8_t* const dst) { + const __m128i mask = _mm_set_epi32(0xffffffffu, 0, 0xffffffffu, 0); + const __m128i B0 = _mm_mul_epu32(*A0, *mult); + const __m128i B1 = _mm_mul_epu32(*A1, *mult); + const __m128i B2 = _mm_mul_epu32(*A2, *mult); + const __m128i B3 = _mm_mul_epu32(*A3, *mult); + const __m128i D0 = _mm_srli_epi64(B0, WEBP_RESCALER_RFIX); + const __m128i D1 = _mm_srli_epi64(B1, WEBP_RESCALER_RFIX); +#if (WEBP_RESCALER_RFIX < 32) + const __m128i D2 = + _mm_and_si128(_mm_slli_epi64(B2, 32 - WEBP_RESCALER_RFIX), mask); + const __m128i D3 = + _mm_and_si128(_mm_slli_epi64(B3, 32 - WEBP_RESCALER_RFIX), mask); +#else + const __m128i D2 = _mm_and_si128(B2, mask); + const __m128i D3 = _mm_and_si128(B3, mask); +#endif + const __m128i E0 = _mm_or_si128(D0, D2); + const __m128i E1 = _mm_or_si128(D1, D3); + const __m128i F = _mm_packs_epi32(E0, E1); + const __m128i G = _mm_packus_epi16(F, F); + _mm_storel_epi64((__m128i*)dst, G); +} + static void RescalerExportRowExpand_SSE2(WebPRescaler* const wrk) { int x_out; uint8_t* const dst = wrk->dst; @@ -322,12 +352,12 @@ static void RescalerExportRowShrink_SSE2(WebPRescaler* const wrk) { const __m128i G1 = _mm_or_si128(D1, F3); _mm_storeu_si128((__m128i*)(irow + x_out + 0), G0); _mm_storeu_si128((__m128i*)(irow + x_out + 4), G1); - ProcessRow_SSE2(&E0, &E1, &E2, &E3, &mult_xy, dst + x_out); + ProcessRow_Floor_SSE2(&E0, &E1, &E2, &E3, &mult_xy, dst + x_out); } } for (; x_out < x_out_max; ++x_out) { const uint32_t frac = (int)MULT_FIX(frow[x_out], yscale); - const int v = (int)MULT_FIX(irow[x_out] - frac, wrk->fxy_scale); + const int v = (int)MULT_FIX_FLOOR(irow[x_out] - frac, wrk->fxy_scale); assert(v >= 0 && v <= 255); dst[x_out] = v; irow[x_out] = frac; // new fractional start @@ -352,6 +382,7 @@ static void RescalerExportRowShrink_SSE2(WebPRescaler* const wrk) { } } +#undef MULT_FIX_FLOOR #undef MULT_FIX #undef ROUNDER |