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Diffstat (limited to 'libFDK/include/mips/scale.h')
-rw-r--r-- | libFDK/include/mips/scale.h | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/libFDK/include/mips/scale.h b/libFDK/include/mips/scale.h new file mode 100644 index 0000000..82b1833 --- /dev/null +++ b/libFDK/include/mips/scale.h @@ -0,0 +1,48 @@ +/*************************** Fraunhofer IIS FDK Tools ********************** + + (C) Copyright Fraunhofer IIS (2007) + All Rights Reserved + + Please be advised that this software and/or program delivery is + Confidential Information of Fraunhofer and subject to and covered by the + + Fraunhofer IIS Software Evaluation Agreement + between Google Inc. and Fraunhofer + effective and in full force since March 1, 2012. + + You may use this software and/or program only under the terms and + conditions described in the above mentioned Fraunhofer IIS Software + Evaluation Agreement. Any other and/or further use requires a separate agreement. + + + $Id$ + Author(s): + Description: + + This software and/or program is protected by copyright law and international + treaties. Any reproduction or distribution of this software and/or program, + or any portion of it, may result in severe civil and criminal penalties, and + will be prosecuted to the maximum extent possible under law. + +******************************************************************************/ + +#ifndef MIPS_SCALE_H +#define MIPS_SCALE_H + +#if defined(__mips_dsp) + +/*! +* +* \brief Scale input value by 2^{scale} and saturate output to 2^{dBits-1} +* \return scaled and saturated value +* +* This macro scales src value right or left and applies saturation to (2^dBits)-1 +* maxima output. +*/ +#define SATURATE_RIGHT_SHIFT(src, scale, dBits) \ + (__builtin_mips_shll_s_w((src)>>scale,(DFRACT_BITS-(dBits)))>>(DFRACT_BITS-(dBits))) + + +#endif /*__mips_dsp */ + +#endif /* MIPS_SCALE_H */ |