walkero
/
openjpeg
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

opj_mct_encode_real(): add SSE optimization

This commit is contained in:
Even Rouault 2020-05-19 19:45:00 +02:00
parent fe4c15f12c
commit c6a413a423
No known key found for this signature in database
GPG Key ID: 33EBBFC47B3DD87D
1 changed files with 47 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
src/lib/openjp2/mct.c
View File

@ -216,6 +216,53 @@ void opj_mct_encode_real(
OPJ_SIZE_T n)
{
OPJ_SIZE_T i;
#ifdef __SSE__
const __m128 YR = _mm_set1_ps(0.299f);
const __m128 YG = _mm_set1_ps(0.587f);
const __m128 YB = _mm_set1_ps(0.114f);
const __m128 UR = _mm_set1_ps(-0.16875f);
const __m128 UG = _mm_set1_ps(-0.331260f);
const __m128 UB = _mm_set1_ps(0.5f);
const __m128 VR = _mm_set1_ps(0.5f);
const __m128 VG = _mm_set1_ps(-0.41869f);
const __m128 VB = _mm_set1_ps(-0.08131f);
for (i = 0; i < (n >> 3); i ++) {
__m128 r, g, b, y, u, v;
r = _mm_load_ps(c0);
g = _mm_load_ps(c1);
b = _mm_load_ps(c2);
y = _mm_add_ps(_mm_add_ps(_mm_mul_ps(r, YR), _mm_mul_ps(g, YG)),
_mm_mul_ps(b, YB));
u = _mm_add_ps(_mm_add_ps(_mm_mul_ps(r, UR), _mm_mul_ps(g, UG)),
_mm_mul_ps(b, UB));
v = _mm_add_ps(_mm_add_ps(_mm_mul_ps(r, VR), _mm_mul_ps(g, VG)),
_mm_mul_ps(b, VB));
_mm_store_ps(c0, y);
_mm_store_ps(c1, u);
_mm_store_ps(c2, v);
c0 += 4;
c1 += 4;
c2 += 4;
r = _mm_load_ps(c0);
g = _mm_load_ps(c1);
b = _mm_load_ps(c2);
y = _mm_add_ps(_mm_add_ps(_mm_mul_ps(r, YR), _mm_mul_ps(g, YG)),
_mm_mul_ps(b, YB));
u = _mm_add_ps(_mm_add_ps(_mm_mul_ps(r, UR), _mm_mul_ps(g, UG)),
_mm_mul_ps(b, UB));
v = _mm_add_ps(_mm_add_ps(_mm_mul_ps(r, VR), _mm_mul_ps(g, VG)),
_mm_mul_ps(b, VB));
_mm_store_ps(c0, y);
_mm_store_ps(c1, u);
_mm_store_ps(c2, v);
c0 += 4;
c1 += 4;
c2 += 4;
}
n &= 7;
#endif
for (i = 0; i < n; ++i) {
OPJ_FLOAT32 r = c0[i];
OPJ_FLOAT32 g = c1[i];