mirror of https://github.com/FreeRDP/FreeRDP
83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
/* FreeRDP: A Remote Desktop Protocol Client
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* Add 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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*/
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#include <freerdp/config.h>
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#include <stdint.h>
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#include <freerdp/types.h>
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#include <freerdp/primitives.h>
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#include "prim_internal.h"
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#include "prim_add.h"
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/* ----------------------------------------------------------------------------
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* 16-bit signed add with saturation (under and over).
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*/
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static INLINE INT16 add(INT16 a, INT16 b)
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{
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INT32 k = (INT32)a + (INT32)b;
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if (k > INT16_MAX)
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return INT16_MAX;
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if (k < INT16_MIN)
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return INT16_MIN;
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return (INT16)k;
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}
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static pstatus_t general_add_16s(const INT16* WINPR_RESTRICT pSrc1,
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const INT16* WINPR_RESTRICT pSrc2, INT16* WINPR_RESTRICT pDst,
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UINT32 len)
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{
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const UINT32 rem = len % 16;
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const UINT32 align = len - rem;
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for (UINT32 x = 0; x < align; x++)
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*pDst++ = add(*pSrc1++, *pSrc2++);
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for (UINT32 x = 0; x < rem; x++)
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*pDst++ = add(*pSrc1++, *pSrc2++);
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return PRIMITIVES_SUCCESS;
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}
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static pstatus_t general_add_16s_inplace(INT16* WINPR_RESTRICT pSrcDst1,
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INT16* WINPR_RESTRICT pSrcDst2, UINT32 len)
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{
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for (UINT32 x = 0; x < len; x++)
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{
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INT16 v = add(pSrcDst1[x], pSrcDst2[x]);
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pSrcDst1[x] = v;
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pSrcDst2[x] = v;
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}
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return PRIMITIVES_SUCCESS;
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}
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/* ------------------------------------------------------------------------- */
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void primitives_init_add(primitives_t* prims)
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{
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prims->add_16s = general_add_16s;
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prims->add_16s_inplace = general_add_16s_inplace;
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}
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void primitives_init_add_opt(primitives_t* WINPR_RESTRICT prims)
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{
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primitives_init_add_sse3(prims);
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}
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