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pixconv: add MMX version of conv_rgba4444_argb8888

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This commit is contained in:
Brad Parker 2019-02-16 18:43:15 -05:00
parent cef04fc693
commit 09d409d5cc
1 changed files with 45 additions and 1 deletions
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46
libretro-common/gfx/scaler/pixconv.c
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@ -390,10 +390,54 @@ void conv_rgba4444_argb8888(void *output_, const void *input_,
const uint16_t *input = (const uint16_t*)input_;
uint32_t *output = (uint32_t*)output_;
#if defined(__MMX__)
const __m64 pix_mask_r = _mm_set1_pi16(0xf << 10);
const __m64 pix_mask_g = _mm_set1_pi16(0xf << 8);
const __m64 pix_mask_b = _mm_set1_pi16(0xf << 8);
const __m64 mul16_r = _mm_set1_pi16(0x0440);
const __m64 mul16_g = _mm_set1_pi16(0x1100);
const __m64 mul16_b = _mm_set1_pi16(0x1100);
const __m64 a = _mm_set1_pi16(0x00ff);
int max_width = width - 3;
#endif
for (h = 0; h < height;
h++, output += out_stride >> 2, input += in_stride >> 1)
{
for (w = 0; w < width; w++)
int w = 0;
#if defined(__MMX__)
for (; w < max_width; w += 4)
{
__m64 res_lo, res_hi;
__m64 res_lo_bg, res_hi_bg, res_lo_ra, res_hi_ra;
const __m64 in = _mm_cvtsi64_m64(*((int64_t*)(input + w)));
__m64 r = _mm_and_si64(_mm_srli_pi16(in, 2), pix_mask_r);
__m64 g = _mm_and_si64(in, pix_mask_g);
__m64 b = _mm_and_si64(_mm_slli_pi16(in, 4), pix_mask_b);
r = _mm_mulhi_pi16(r, mul16_r);
g = _mm_mulhi_pi16(g, mul16_g);
b = _mm_mulhi_pi16(b, mul16_b);
res_lo_bg = _mm_unpacklo_pi8(b, g);
res_hi_bg = _mm_unpackhi_pi8(b, g);
res_lo_ra = _mm_unpacklo_pi8(r, a);
res_hi_ra = _mm_unpackhi_pi8(r, a);
res_lo = _mm_or_si64(res_lo_bg,
_mm_slli_si64(res_lo_ra, 16));
res_hi = _mm_or_si64(res_hi_bg,
_mm_slli_si64(res_hi_ra, 16));
*((int64_t*)(output + w + 0)) = _mm_cvtm64_si64(res_lo);
*((int64_t*)(output + w + 2)) = _mm_cvtm64_si64(res_hi);
}
_mm_empty();
#endif
for (; w < width; w++)
{
uint32_t col = input[w];
uint32_t r = (col >> 12) & 0xf;