545a5cb664
2010-12-06 Tobias Burnus <burnus@net-b.de>
PR fortran/46817
* quadmath-imp.h: Add LGPL header.
* quadmath.h: Add LGPL header.
* quadmath_io.c: Add LGPL header.
* quadmath_weak.h: Add LGPL header.
From-SVN: r167521
167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
/* GCC Quad-Precision Math Library
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Copyright (C) 2010 Free Software Foundation, Inc.
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Written by Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
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This file is part of the libiberty library.
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Libiberty is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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Libiberty is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with libiberty; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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Boston, MA 02110-1301, USA. */
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#ifndef QUADMATH_IMP_H
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#define QUADMATH_IMP_H
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#include <stdint.h>
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#include <stdlib.h>
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#include "quadmath.h"
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// Prototypes for internal functions
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extern int32_t rem_pio2q (__float128, __float128 *);
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extern void __kernel_sincosq (__float128, __float128, __float128 *, __float128 *, int);
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extern __float128 __kernel_sinq (__float128, __float128, int);
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extern __float128 __kernel_cosq (__float128, __float128);
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// Frankly, if you have __float128, you have 64-bit integers, right?
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#ifndef UINT64_C
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# error "No way!"
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#endif
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// If we don't have macros to know endianess, assume little endian
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#if !defined(__BIG_ENDIAN__) && !defined(__LITTLE_ENDIAN__)
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# define __LITTLE_ENDIAN__ 1
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#endif
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// Main union type we use to manipulate the floating-point type
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typedef union
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{
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__float128 value;
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struct
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{
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#if __BIG_ENDIAN__
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unsigned negative:1;
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unsigned exponent:15;
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uint64_t mant_high:48;
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uint64_t mant_low:64;
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#endif
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#if __LITTLE_ENDIAN__
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uint64_t mant_low:64;
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uint64_t mant_high:48;
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unsigned exponent:15;
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unsigned negative:1;
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#endif
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} ieee;
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struct
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{
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#if __BIG_ENDIAN__
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uint64_t high;
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uint64_t low;
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#endif
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#if __LITTLE_ENDIAN__
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uint64_t low;
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uint64_t high;
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#endif
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} words64;
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struct
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{
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#if __BIG_ENDIAN__
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uint32_t w0;
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uint32_t w1;
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uint32_t w2;
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uint32_t w3;
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#endif
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#if __LITTLE_ENDIAN__
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uint32_t w3;
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uint32_t w2;
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uint32_t w1;
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uint32_t w0;
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#endif
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} words32;
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struct
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{
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#if __BIG_ENDIAN__
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unsigned negative:1;
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unsigned exponent:15;
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unsigned quiet_nan:1;
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uint64_t mant_high:47;
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uint64_t mant_low:64;
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#endif
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#if __LITTLE_ENDIAN__
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uint64_t mant_low:64;
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uint64_t mant_high:47;
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unsigned quiet_nan:1;
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unsigned exponent:15;
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unsigned negative:1;
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#endif
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} nan;
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} ieee854_float128;
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/* Get two 64 bit ints from a long double. */
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#define GET_FLT128_WORDS64(ix0,ix1,d) \
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do { \
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ieee854_float128 u; \
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u.value = (d); \
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(ix0) = u.words64.high; \
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(ix1) = u.words64.low; \
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} while (0)
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/* Set a long double from two 64 bit ints. */
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#define SET_FLT128_WORDS64(d,ix0,ix1) \
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do { \
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ieee854_float128 u; \
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u.words64.high = (ix0); \
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u.words64.low = (ix1); \
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(d) = u.value; \
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} while (0)
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/* Get the more significant 64 bits of a long double mantissa. */
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#define GET_FLT128_MSW64(v,d) \
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do { \
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ieee854_float128 u; \
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u.value = (d); \
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(v) = u.words64.high; \
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} while (0)
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/* Set the more significant 64 bits of a long double mantissa from an int. */
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#define SET_FLT128_MSW64(d,v) \
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do { \
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ieee854_float128 u; \
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u.value = (d); \
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u.words64.high = (v); \
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(d) = u.value; \
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} while (0)
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/* Get the least significant 64 bits of a long double mantissa. */
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#define GET_FLT128_LSW64(v,d) \
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do { \
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ieee854_float128 u; \
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u.value = (d); \
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(v) = u.words64.low; \
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} while (0)
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#define IEEE854_FLOAT128_BIAS 0x3fff
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#endif
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