123 lines
5.5 KiB
C
123 lines
5.5 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifndef _SKP_SILK_API_C_H_
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#define _SKP_SILK_API_C_H_
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// This is an inline header file for general platform.
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// (a32 * (SKP_int32)((SKP_int16)(b32))) >> 16 output have to be 32bit int
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#define SKP_SMULWB(a32, b32) ((((a32) >> 16) * (SKP_int32)((SKP_int16)(b32))) + ((((a32) & 0x0000FFFF) * (SKP_int32)((SKP_int16)(b32))) >> 16))
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// a32 + (b32 * (SKP_int32)((SKP_int16)(c32))) >> 16 output have to be 32bit int
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#define SKP_SMLAWB(a32, b32, c32) ((a32) + ((((b32) >> 16) * (SKP_int32)((SKP_int16)(c32))) + ((((b32) & 0x0000FFFF) * (SKP_int32)((SKP_int16)(c32))) >> 16)))
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// (a32 * (b32 >> 16)) >> 16
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#define SKP_SMULWT(a32, b32) (((a32) >> 16) * ((b32) >> 16) + ((((a32) & 0x0000FFFF) * ((b32) >> 16)) >> 16))
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// a32 + (b32 * (c32 >> 16)) >> 16
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#define SKP_SMLAWT(a32, b32, c32) ((a32) + (((b32) >> 16) * ((c32) >> 16)) + ((((b32) & 0x0000FFFF) * ((c32) >> 16)) >> 16))
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// (SKP_int32)((SKP_int16)(a3))) * (SKP_int32)((SKP_int16)(b32)) output have to be 32bit int
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#define SKP_SMULBB(a32, b32) ((SKP_int32)((SKP_int16)(a32)) * (SKP_int32)((SKP_int16)(b32)))
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// a32 + (SKP_int32)((SKP_int16)(b32)) * (SKP_int32)((SKP_int16)(c32)) output have to be 32bit int
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#define SKP_SMLABB(a32, b32, c32) ((a32) + ((SKP_int32)((SKP_int16)(b32))) * (SKP_int32)((SKP_int16)(c32)))
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// (SKP_int32)((SKP_int16)(a32)) * (b32 >> 16)
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#define SKP_SMULBT(a32, b32) ((SKP_int32)((SKP_int16)(a32)) * ((b32) >> 16))
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// a32 + (SKP_int32)((SKP_int16)(b32)) * (c32 >> 16)
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#define SKP_SMLABT(a32, b32, c32) ((a32) + ((SKP_int32)((SKP_int16)(b32))) * ((c32) >> 16))
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// a64 + (b32 * c32)
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#define SKP_SMLAL(a64, b32, c32) (SKP_ADD64((a64), ((SKP_int64)(b32) * (SKP_int64)(c32))))
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// (a32 * b32) >> 16
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#define SKP_SMULWW(a32, b32) SKP_MLA(SKP_SMULWB((a32), (b32)), (a32), SKP_RSHIFT_ROUND((b32), 16))
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// a32 + ((b32 * c32) >> 16)
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#define SKP_SMLAWW(a32, b32, c32) SKP_MLA(SKP_SMLAWB((a32), (b32), (c32)), (b32), SKP_RSHIFT_ROUND((c32), 16))
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/* add/subtract with output saturated */
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#define SKP_ADD_SAT32(a, b) ((((a) + (b)) & 0x80000000) == 0 ? \
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((((a) & (b)) & 0x80000000) != 0 ? SKP_int32_MIN : (a)+(b)) : \
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((((a) | (b)) & 0x80000000) == 0 ? SKP_int32_MAX : (a)+(b)) )
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#define SKP_SUB_SAT32(a, b) ((((a)-(b)) & 0x80000000) == 0 ? \
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(( (a) & ((b)^0x80000000) & 0x80000000) ? SKP_int32_MIN : (a)-(b)) : \
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((((a)^0x80000000) & (b) & 0x80000000) ? SKP_int32_MAX : (a)-(b)) )
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SKP_INLINE SKP_int32 SKP_Silk_CLZ16(SKP_int16 in16)
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{
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SKP_int32 out32 = 0;
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if( in16 == 0 ) {
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return 16;
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}
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/* test nibbles */
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if( in16 & 0xFF00 ) {
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if( in16 & 0xF000 ) {
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in16 >>= 12;
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} else {
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out32 += 4;
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in16 >>= 8;
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}
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} else {
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if( in16 & 0xFFF0 ) {
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out32 += 8;
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in16 >>= 4;
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} else {
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out32 += 12;
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}
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}
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/* test bits and return */
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if( in16 & 0xC ) {
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if( in16 & 0x8 )
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return out32 + 0;
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else
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return out32 + 1;
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} else {
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if( in16 & 0xE )
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return out32 + 2;
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else
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return out32 + 3;
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}
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}
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SKP_INLINE SKP_int32 SKP_Silk_CLZ32(SKP_int32 in32)
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{
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/* test highest 16 bits and convert to SKP_int16 */
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if( in32 & 0xFFFF0000 ) {
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return SKP_Silk_CLZ16((SKP_int16)(in32 >> 16));
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} else {
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return SKP_Silk_CLZ16((SKP_int16)in32) + 16;
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}
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}
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#endif //_SKP_SILK_API_C_H_
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