gem5/ext/fputils/fpbits.h
Andreas Sandberg 7c52865d1b ext: Update fputils to rev 52b6190b4e
This changeset updates the external library to git revision
52b6190b4e. This update includes changes that fix compilation errors
on old gcc versions and fixes to test a case that affect ICC.
2013-10-01 15:19:56 +02:00

95 lines
3.5 KiB
C

/*
* Copyright (c) 2013, Andreas Sandberg
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*/
#ifndef _FPBITS_H
#define _FPBITS_H
#include <stdint.h>
#define FP80_FRAC_BITS 63
#define FP80_INT_BIT 0x8000000000000000ULL
#define FP80_QNAN_BIT 0x4000000000000000ULL
#define FP80_FRAC_MASK 0x7fffffffffffffffULL
#define FP80_EXP_MASK 0x7fff
#define FP80_SIGN_BIT 0x8000
#define FP80_EXP_BIAS 0x3fff
#define FP80_EXP_SPECIAL 0x7fff
#define FP80_FRAC_SNAN 0x3fffffffffffffffULL
#define FP80_FRAC_QNAN 0x7fffffffffffffffULL
#define FP80_FRAC_QNANI 0x4000000000000000ULL
#define FP64_EXP_SHIFT 52
#define FP64_FRAC_BITS 52
#define FP64_SIGN_BIT 0x8000000000000000ULL
#define FP64_EXP_MASK 0x7ff0000000000000ULL
#define FP64_FRAC_MASK 0x000fffffffffffffULL
#define FP64_EXP_BIAS 0x3ff
#define FP64_EXP_SPECIAL 0x7ff
#define FP64_FRAC_SNAN 0x0007ffffffffffffULL
#define FP64_FRAC_QNAN 0x000fffffffffffffULL
#define FP64_FRAC_QNANI 0x0008000000000000ULL
#define BUILD_IFP64(sign, frac, exp) \
((sign) ? FP64_SIGN_BIT : 0) | \
(((uint64_t)(exp) << FP64_EXP_SHIFT) & FP64_EXP_MASK) | \
((frac) & FP64_FRAC_MASK)
#define BUILD_FP64(sign, frac, exp) \
{ .bits = BUILD_IFP64(sign, frac, exp) }
#define BUILD_FP80_SE(sign, exp) \
((sign) ? FP80_SIGN_BIT : 0) | \
((exp) & FP80_EXP_MASK)
#define BUILD_FP80_FI(frac, exp) \
((exp) ? FP80_INT_BIT : 0) | \
((frac) & FP80_FRAC_MASK)
#define BUILD_FP80(sign, frac, exp) \
{ \
.repr.se = BUILD_FP80_SE(sign, exp), \
.repr.fi = BUILD_FP80_FI(frac, exp) \
}
#define FP80_FRAC(fp80) \
(fp80.repr.fi & FP80_FRAC_MASK)
#define FP80_EXP(fp80) \
(fp80.repr.se & FP80_EXP_MASK)
#define FP64_FRAC(fp64) \
(fp64.bits & FP64_FRAC_MASK)
#define FP64_EXP(fp80) \
((fp64.bits & FP64_EXP_MASK) >> FP64_EXP_SHIFT)
#endif