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9bf37cc971
License boilerplate update to follow. Change-Id: I2810460c11a58b6d148d84673cc031f3685e79b5
128 lines
3.3 KiB
C
128 lines
3.3 KiB
C
/*************************** Fraunhofer IIS FDK Tools **********************
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(C) Copyright Fraunhofer IIS (1999)
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All Rights Reserved
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Please be advised that this software and/or program delivery is
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Confidential Information of Fraunhofer and subject to and covered by the
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Fraunhofer IIS Software Evaluation Agreement
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between Google Inc. and Fraunhofer
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effective and in full force since March 1, 2012.
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You may use this software and/or program only under the terms and
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conditions described in the above mentioned Fraunhofer IIS Software
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Evaluation Agreement. Any other and/or further use requires a separate agreement.
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$Id$
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Author(s): Marc Gayer
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Description: fixed point intrinsics
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This software and/or program is protected by copyright law and international
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treaties. Any reproduction or distribution of this software and/or program,
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or any portion of it, may result in severe civil and criminal penalties, and
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will be prosecuted to the maximum extent possible under law.
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******************************************************************************/
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#if !defined(__CLZ_H__)
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#define __CLZ_H__
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#include "FDK_archdef.h"
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#include "machine_type.h"
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#if defined(__arm__)
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#include "arm/clz_arm.h"
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#elif defined(__mips__) /* cppp replaced: elif */
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#include "mips/clz_mips.h"
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#endif /* all cores */
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/*************************************************************************
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*************************************************************************
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Software fallbacks for missing functions.
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**************************************************************************
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**************************************************************************/
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#if !defined(FUNCTION_fixnormz_S)
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#ifdef FUNCTION_fixnormz_D
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inline INT fixnormz_S (SHORT a)
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{
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return fixnormz_D((INT)(a));
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}
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#else
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inline INT fixnormz_S (SHORT a)
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{
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int leadingBits = 0;
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a = ~a;
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while(a & 0x8000) {
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leadingBits++;
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a <<= 1;
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}
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return (leadingBits);
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}
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#endif
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#endif
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#if !defined(FUNCTION_fixnormz_D)
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inline INT fixnormz_D (LONG a)
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{
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INT leadingBits = 0;
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a = ~a;
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while(a & 0x80000000) {
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leadingBits++;
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a <<= 1;
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}
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return (leadingBits);
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}
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#endif
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/*****************************************************************************
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functionname: fixnorm_D
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description: Count leading ones or zeros of operand val for dfract/LONG INT values.
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Return this value minus 1. Return 0 if operand==0.
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*****************************************************************************/
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#if !defined(FUNCTION_fixnorm_S)
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#ifdef FUNCTION_fixnorm_D
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inline INT fixnorm_S(FIXP_SGL val)
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{
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return fixnorm_D((INT)(val));
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}
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#else
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inline INT fixnorm_S(FIXP_SGL val)
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{
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INT leadingBits = 0;
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if ( val != (FIXP_SGL)0 ) {
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if ( val < (FIXP_SGL)0 ) {
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val = ~val;
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}
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leadingBits = fixnormz_S(val) - 1;
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}
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return (leadingBits);
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}
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#endif
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#endif
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#if !defined(FUNCTION_fixnorm_D)
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inline INT fixnorm_D(FIXP_DBL val)
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{
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INT leadingBits = 0;
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if ( val != (FIXP_DBL)0 ) {
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if ( val < (FIXP_DBL)0 ) {
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val = ~val;
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}
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leadingBits = fixnormz_D(val) - 1;
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}
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return (leadingBits);
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}
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#endif
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#endif /* __CLZ_H__ */
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