/* Copyright (c) 2003-2008 Jean-Marc Valin Copyright (c) 2007-2008 CSIRO Copyright (c) 2007-2009 Xiph.Org Foundation
Written by Jean-Marc Valin */ /** @file arch.h @brief Various architecture definitions for CELT
*/ /* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
- Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Set this if opus_int64 is a native type of the CPU. */ /* Assume that all LP64 architectures have fast 64-bit types; also x86_64
(which can be ILP32 for x32) and Win64 (which is LLP64). */ #ifdefined(__x86_64__) || defined(__LP64__) || defined(_WIN64) #define OPUS_FAST_INT64 1 #else #define OPUS_FAST_INT64 0 #endif
#define SIG_SHIFT 12 /* Safe saturation value for 32-bit signals. Should be less than
2^31*(1-0.85) to avoid blowing up on DC at deemphasis.*/ #define SIG_SAT (300000000)
#ifdef FLOAT_APPROX /* This code should reliably detect NaN/inf even when -ffast-math is used.
Assumes IEEE 754 format. */ static OPUS_INLINE int celt_isnan(float x)
{ union {float f; opus_uint32 i;} in;
in.f = x; return ((in.i>>23)&0xFF)==0xFF && (in.i&0x007FFFFF)!=0;
} #else #ifdef __FAST_MATH__ #error Cannot build libopus with -ffast-math unless FLOAT_APPROX is defined. This could result in crashes on extreme (e.g. NaN) input #endif #define celt_isnan(x) ((x)!=(x)) #endif
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