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Significant optimizations of MCT, DWT, MQ and T1 modules by Peter Wimmer (thanks Peter)

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Francois-Olivier Devaux
2010-04-08 17:22:58 +00:00
parent d03779ee2a
commit 627f484bce
9 changed files with 612 additions and 86 deletions
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42
libopenjpeg/mct.c
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@@ -29,6 +29,10 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef __SSE__
#include <xmmintrin.h>
#endif
#include "opj_includes.h"
/* <summary> */
@@ -127,6 +131,44 @@ void mct_decode_real(
int n)
{
int i;
#ifdef __SSE__
__m128 vrv, vgu, vgv, vbu;
vrv = _mm_set1_ps(1.402f);
vgu = _mm_set1_ps(0.34413f);
vgv = _mm_set1_ps(0.71414f);
vbu = _mm_set1_ps(1.772f);
for (i = 0; i < (n >> 3); ++i) {
__m128 vy, vu, vv;
__m128 vr, vg, vb;
vy = _mm_load_ps(c0);
vu = _mm_load_ps(c1);
vv = _mm_load_ps(c2);
vr = _mm_add_ps(vy, _mm_mul_ps(vv, vrv));
vg = _mm_sub_ps(_mm_sub_ps(vy, _mm_mul_ps(vu, vgu)), _mm_mul_ps(vv, vgv));
vb = _mm_add_ps(vy, _mm_mul_ps(vu, vbu));
_mm_store_ps(c0, vr);
_mm_store_ps(c1, vg);
_mm_store_ps(c2, vb);
c0 += 4;
c1 += 4;
c2 += 4;
vy = _mm_load_ps(c0);
vu = _mm_load_ps(c1);
vv = _mm_load_ps(c2);
vr = _mm_add_ps(vy, _mm_mul_ps(vv, vrv));
vg = _mm_sub_ps(_mm_sub_ps(vy, _mm_mul_ps(vu, vgu)), _mm_mul_ps(vv, vgv));
vb = _mm_add_ps(vy, _mm_mul_ps(vu, vbu));
_mm_store_ps(c0, vr);
_mm_store_ps(c1, vg);
_mm_store_ps(c2, vb);
c0 += 4;
c1 += 4;
c2 += 4;
}
n &= 7;
#endif
for(i = 0; i < n; ++i) {
float y = c0[i];
float u = c1[i];