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/* FreeRDP: A Remote Desktop Protocol Client
* Optimized sign operations.
* vi:ts=4 sw=4:
*
* (c) Copyright 2012 Hewlett-Packard Development Company, L.P.
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
#include <freerdp/config.h>
#include <freerdp/types.h>
#include <freerdp/primitives.h>
#include <winpr/sysinfo.h>
#ifdef WITH_SSE2
#include <emmintrin.h>
#include <tmmintrin.h>
#endif /* WITH_SSE2 */
#include "prim_internal.h"
static primitives_t* generic = NULL;
#ifdef WITH_SSE2
/* ------------------------------------------------------------------------- */
static pstatus_t ssse3_sign_16s(const INT16* WINPR_RESTRICT pSrc, INT16* WINPR_RESTRICT pDst,
UINT32 len)
{
const INT16* sptr = (const INT16*)pSrc;
INT16* dptr = (INT16*)pDst;
size_t count = 0;
if (len < 16)
{
return generic->sign_16s(pSrc, pDst, len);
}
/* Check for 16-byte alignment (eventually). */
if ((ULONG_PTR)pDst & 0x01)
{
return generic->sign_16s(pSrc, pDst, len);
}
/* Seek 16-byte alignment. */
while ((ULONG_PTR)dptr & 0x0f)
{
INT16 src = *sptr++;
*dptr++ = (src < 0) ? (-1) : ((src > 0) ? 1 : 0);
if (--len == 0)
return PRIMITIVES_SUCCESS;
}
/* Do 32-short chunks using 8 XMM registers. */
count = len >> 5; /* / 32 */
len -= count << 5; /* * 32 */
if ((ULONG_PTR)sptr & 0x0f)
{
/* Unaligned */
while (count--)
{
__m128i xmm0;
__m128i xmm1;
__m128i xmm2;
__m128i xmm3;
__m128i xmm4;
__m128i xmm5;
__m128i xmm6;
__m128i xmm7;
xmm0 = _mm_set1_epi16(0x0001U);
xmm1 = _mm_set1_epi16(0x0001U);
xmm2 = _mm_set1_epi16(0x0001U);
xmm3 = _mm_set1_epi16(0x0001U);
xmm4 = _mm_lddqu_si128((const __m128i*)sptr);
sptr += 8;
xmm5 = _mm_lddqu_si128((const __m128i*)sptr);
sptr += 8;
xmm6 = _mm_lddqu_si128((const __m128i*)sptr);
sptr += 8;
xmm7 = _mm_lddqu_si128((const __m128i*)sptr);
sptr += 8;
xmm0 = _mm_sign_epi16(xmm0, xmm4);
xmm1 = _mm_sign_epi16(xmm1, xmm5);
xmm2 = _mm_sign_epi16(xmm2, xmm6);
xmm3 = _mm_sign_epi16(xmm3, xmm7);
_mm_store_si128((__m128i*)dptr, xmm0);
dptr += 8;
_mm_store_si128((__m128i*)dptr, xmm1);
dptr += 8;
_mm_store_si128((__m128i*)dptr, xmm2);
dptr += 8;
_mm_store_si128((__m128i*)dptr, xmm3);
dptr += 8;
}
}
else
{
/* Aligned */
while (count--)
{
__m128i xmm0;
__m128i xmm1;
__m128i xmm2;
__m128i xmm3;
__m128i xmm4;
__m128i xmm5;
__m128i xmm6;
__m128i xmm7;
xmm0 = _mm_set1_epi16(0x0001U);
xmm1 = _mm_set1_epi16(0x0001U);
xmm2 = _mm_set1_epi16(0x0001U);
xmm3 = _mm_set1_epi16(0x0001U);
xmm4 = _mm_load_si128((const __m128i*)sptr);
sptr += 8;
xmm5 = _mm_load_si128((const __m128i*)sptr);
sptr += 8;
xmm6 = _mm_load_si128((const __m128i*)sptr);
sptr += 8;
xmm7 = _mm_load_si128((const __m128i*)sptr);
sptr += 8;
xmm0 = _mm_sign_epi16(xmm0, xmm4);
xmm1 = _mm_sign_epi16(xmm1, xmm5);
xmm2 = _mm_sign_epi16(xmm2, xmm6);
xmm3 = _mm_sign_epi16(xmm3, xmm7);
_mm_store_si128((__m128i*)dptr, xmm0);
dptr += 8;
_mm_store_si128((__m128i*)dptr, xmm1);
dptr += 8;
_mm_store_si128((__m128i*)dptr, xmm2);
dptr += 8;
_mm_store_si128((__m128i*)dptr, xmm3);
dptr += 8;
}
}
/* Do 8-short chunks using two XMM registers. */
count = len >> 3;
len -= count << 3;
while (count--)
{
__m128i xmm0 = _mm_set1_epi16(0x0001U);
__m128i xmm1 = LOAD_SI128(sptr);
sptr += 8;
xmm0 = _mm_sign_epi16(xmm0, xmm1);
_mm_store_si128((__m128i*)dptr, xmm0);
dptr += 8;
}
/* Do leftovers. */
while (len--)
{
INT16 src = *sptr++;
*dptr++ = (src < 0) ? -1 : ((src > 0) ? 1 : 0);
}
return PRIMITIVES_SUCCESS;
}
#endif /* WITH_SSE2 */
/* ------------------------------------------------------------------------- */
void primitives_init_sign_opt(primitives_t* WINPR_RESTRICT prims)
{
generic = primitives_get_generic();
primitives_init_sign(prims);
/* Pick tuned versions if possible. */
/* I didn't spot an IPP version of this. */
#if defined(WITH_SSE2)
if (IsProcessorFeaturePresentEx(PF_EX_SSSE3) &&
IsProcessorFeaturePresent(PF_SSE3_INSTRUCTIONS_AVAILABLE))
{
prims->sign_16s = ssse3_sign_16s;
}
#endif
}
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