151 lines
4.3 KiB
C
151 lines
4.3 KiB
C
/* FreeRDP: A Remote Desktop Protocol Client
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* Optimized sign operations.
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* vi:ts=4 sw=4:
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*
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* (c) Copyright 2012 Hewlett-Packard Development Company, L.P.
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* not use this file except in compliance with the License. You may obtain
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* a copy of the License at http://www.apache.org/licenses/LICENSE-2.0.
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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* or implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <freerdp/types.h>
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#include <freerdp/primitives.h>
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#include <winpr/sysinfo.h>
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#ifdef WITH_SSE2
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#include <emmintrin.h>
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#include <tmmintrin.h>
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#endif /* WITH_SSE2 */
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#include "prim_internal.h"
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#include "prim_sign.h"
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#ifdef WITH_SSE2
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/* ------------------------------------------------------------------------- */
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pstatus_t ssse3_sign_16s(
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const INT16 *pSrc,
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INT16 *pDst,
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INT32 len)
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{
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const INT16 *sptr = (const INT16 *) pSrc;
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INT16 *dptr = (INT16 *) pDst;
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size_t count;
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if (len < 16)
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{
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return general_sign_16s(pSrc, pDst, len);
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}
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/* Check for 16-byte alignment (eventually). */
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if ((ULONG_PTR) pDst & 0x01)
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{
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return general_sign_16s(pSrc, pDst, len);
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}
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/* Seek 16-byte alignment. */
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while ((ULONG_PTR) dptr & 0x0f)
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{
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INT16 src = *sptr++;
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*dptr++ = (src < 0) ? (-1) : ((src > 0) ? 1 : 0);
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if (--len == 0) return PRIMITIVES_SUCCESS;
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}
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/* Do 32-short chunks using 8 XMM registers. */
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count = len >> 5; /* / 32 */
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len -= count << 5; /* * 32 */
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if ((ULONG_PTR) sptr & 0x0f)
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{
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/* Unaligned */
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while (count--)
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{
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__m128i xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7;
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xmm0 = _mm_set1_epi16(0x0001U);
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xmm1 = _mm_set1_epi16(0x0001U);
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xmm2 = _mm_set1_epi16(0x0001U);
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xmm3 = _mm_set1_epi16(0x0001U);
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xmm4 = _mm_lddqu_si128((__m128i *) sptr); sptr += 8;
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xmm5 = _mm_lddqu_si128((__m128i *) sptr); sptr += 8;
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xmm6 = _mm_lddqu_si128((__m128i *) sptr); sptr += 8;
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xmm7 = _mm_lddqu_si128((__m128i *) sptr); sptr += 8;
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xmm0 = _mm_sign_epi16(xmm0, xmm4);
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xmm1 = _mm_sign_epi16(xmm1, xmm5);
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xmm2 = _mm_sign_epi16(xmm2, xmm6);
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xmm3 = _mm_sign_epi16(xmm3, xmm7);
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_mm_store_si128((__m128i *) dptr, xmm0); dptr += 8;
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_mm_store_si128((__m128i *) dptr, xmm1); dptr += 8;
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_mm_store_si128((__m128i *) dptr, xmm2); dptr += 8;
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_mm_store_si128((__m128i *) dptr, xmm3); dptr += 8;
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}
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}
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else
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{
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/* Aligned */
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while (count--)
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{
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__m128i xmm0, xmm1, xmm2, xmm3, xmm4, xmm5, xmm6, xmm7;
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xmm0 = _mm_set1_epi16(0x0001U);
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xmm1 = _mm_set1_epi16(0x0001U);
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xmm2 = _mm_set1_epi16(0x0001U);
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xmm3 = _mm_set1_epi16(0x0001U);
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xmm4 = _mm_load_si128((__m128i *) sptr); sptr += 8;
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xmm5 = _mm_load_si128((__m128i *) sptr); sptr += 8;
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xmm6 = _mm_load_si128((__m128i *) sptr); sptr += 8;
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xmm7 = _mm_load_si128((__m128i *) sptr); sptr += 8;
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xmm0 = _mm_sign_epi16(xmm0, xmm4);
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xmm1 = _mm_sign_epi16(xmm1, xmm5);
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xmm2 = _mm_sign_epi16(xmm2, xmm6);
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xmm3 = _mm_sign_epi16(xmm3, xmm7);
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_mm_store_si128((__m128i *) dptr, xmm0); dptr += 8;
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_mm_store_si128((__m128i *) dptr, xmm1); dptr += 8;
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_mm_store_si128((__m128i *) dptr, xmm2); dptr += 8;
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_mm_store_si128((__m128i *) dptr, xmm3); dptr += 8;
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}
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}
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/* Do 8-short chunks using two XMM registers. */
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count = len >> 3;
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len -= count << 3;
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while (count--)
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{
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__m128i xmm0 = _mm_set1_epi16(0x0001U);
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__m128i xmm1 = LOAD_SI128(sptr); sptr += 8;
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xmm0 = _mm_sign_epi16(xmm0, xmm1);
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_mm_store_si128((__m128i *) dptr, xmm0); dptr += 8;
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}
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/* Do leftovers. */
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while (len--)
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{
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INT16 src = *sptr++;
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*dptr++ = (src < 0) ? -1 : ((src > 0) ? 1 : 0);
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}
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return PRIMITIVES_SUCCESS;
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}
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#endif /* WITH_SSE2 */
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/* ------------------------------------------------------------------------- */
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void primitives_init_sign_opt(primitives_t *prims)
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{
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/* Pick tuned versions if possible. */
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/* I didn't spot an IPP version of this. */
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#if defined(WITH_SSE2)
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if (IsProcessorFeaturePresent(PF_XMMI64_INSTRUCTIONS_AVAILABLE)
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&& IsProcessorFeaturePresent(PF_SSE3_INSTRUCTIONS_AVAILABLE))
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{
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prims->sign_16s = ssse3_sign_16s;
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}
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#endif
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}
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