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opj_t1_clbl_decode_processor(): use SSE2 in subtile decoding code path, for irreversible

This commit is contained in:
Even Rouault 2017-09-01 21:17:26 +02:00
parent 2c365fe0ec
commit 4c7effa6bc
1 changed files with 35 additions and 1 deletions
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36
src/lib/openjp2/t1.c
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@ -38,7 +38,20 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#define OPJ_SKIP_POISON
#include "opj_includes.h"
#ifdef __SSE__
#include <xmmintrin.h>
#endif
#ifdef __SSE2__
#include <emmintrin.h>
#endif
#if defined(__GNUC__)
#pragma GCC poison malloc calloc realloc free
#endif
#include "t1_luts.h"
/** @defgroup T1 T1 - Implementation of the tier-1 coding */
@ -1710,7 +1723,28 @@ static void opj_t1_clbl_decode_processor(void* user_data, opj_tls_t* tls)
datap[i] /= 2;
}
} else { /* if (tccp->qmfbid == 0) */
for (i = 0; i < cblk_size; ++i) {
i = 0;
#ifdef __SSE2__
{
const __m128 xmm_stepsize = _mm_set1_ps(band->stepsize);
for (; i < (cblk_size & ~15U); i += 16) {
__m128 xmm0_data = _mm_cvtepi32_ps(_mm_load_si128((__m128i * const)(
datap + 0)));
__m128 xmm1_data = _mm_cvtepi32_ps(_mm_load_si128((__m128i * const)(
datap + 4)));
__m128 xmm2_data = _mm_cvtepi32_ps(_mm_load_si128((__m128i * const)(
datap + 8)));
__m128 xmm3_data = _mm_cvtepi32_ps(_mm_load_si128((__m128i * const)(
datap + 12)));
_mm_store_ps((float*)(datap + 0), _mm_mul_ps(xmm0_data, xmm_stepsize));
_mm_store_ps((float*)(datap + 4), _mm_mul_ps(xmm1_data, xmm_stepsize));
_mm_store_ps((float*)(datap + 8), _mm_mul_ps(xmm2_data, xmm_stepsize));
_mm_store_ps((float*)(datap + 12), _mm_mul_ps(xmm3_data, xmm_stepsize));
datap += 16;
}
}
#endif
for (; i < cblk_size; ++i) {
OPJ_FLOAT32 tmp = ((OPJ_FLOAT32)(*datap)) * band->stepsize;
memcpy(datap, &tmp, sizeof(tmp));
datap++;