mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-26 23:10:06 +00:00
581c785bf3
I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 7061 files FOO. I then removed trailing white space from math/tgmath.h, support/tst-support-open-dev-null-range.c, and sysdeps/x86_64/multiarch/strlen-vec.S, to work around the following obscure pre-commit check failure diagnostics from Savannah. I don't know why I run into these diagnostics whereas others evidently do not. remote: *** 912-#endif remote: *** 913: remote: *** 914- remote: *** error: lines with trailing whitespace found ... remote: *** error: sysdeps/unix/sysv/linux/statx_cp.c: trailing lines
121 lines
3.0 KiB
C
121 lines
3.0 KiB
C
/* Manipulation of the bit representation of 'long double' quantities.
|
|
Copyright (C) 1999-2022 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _MATH_LDBL_H_
|
|
#define _MATH_LDBL_H_ 1
|
|
|
|
#include <stdint.h>
|
|
#include <endian.h>
|
|
|
|
/* A union which permits us to convert between a long double and
|
|
four 32 bit ints or two 64 bit ints. */
|
|
|
|
#if __FLOAT_WORD_ORDER == __BIG_ENDIAN
|
|
|
|
typedef union
|
|
{
|
|
long double value;
|
|
struct
|
|
{
|
|
uint64_t msw;
|
|
uint64_t lsw;
|
|
} parts64;
|
|
struct
|
|
{
|
|
uint32_t w0, w1, w2, w3;
|
|
} parts32;
|
|
} ieee854_long_double_shape_type;
|
|
|
|
#endif
|
|
|
|
#if __FLOAT_WORD_ORDER == __LITTLE_ENDIAN
|
|
|
|
typedef union
|
|
{
|
|
long double value;
|
|
struct
|
|
{
|
|
uint64_t lsw;
|
|
uint64_t msw;
|
|
} parts64;
|
|
struct
|
|
{
|
|
uint32_t w3, w2, w1, w0;
|
|
} parts32;
|
|
} ieee854_long_double_shape_type;
|
|
|
|
#endif
|
|
|
|
/* Get two 64 bit ints from a long double. */
|
|
|
|
#define GET_LDOUBLE_WORDS64(ix0,ix1,d) \
|
|
do { \
|
|
ieee854_long_double_shape_type qw_u; \
|
|
qw_u.value = (d); \
|
|
(ix0) = qw_u.parts64.msw; \
|
|
(ix1) = qw_u.parts64.lsw; \
|
|
} while (0)
|
|
|
|
/* Set a long double from two 64 bit ints. */
|
|
|
|
#define SET_LDOUBLE_WORDS64(d,ix0,ix1) \
|
|
do { \
|
|
ieee854_long_double_shape_type qw_u; \
|
|
qw_u.parts64.msw = (ix0); \
|
|
qw_u.parts64.lsw = (ix1); \
|
|
(d) = qw_u.value; \
|
|
} while (0)
|
|
|
|
/* Get the more significant 64 bits of a long double mantissa. */
|
|
|
|
#define GET_LDOUBLE_MSW64(v,d) \
|
|
do { \
|
|
ieee854_long_double_shape_type sh_u; \
|
|
sh_u.value = (d); \
|
|
(v) = sh_u.parts64.msw; \
|
|
} while (0)
|
|
|
|
/* Set the more significant 64 bits of a long double mantissa from an int. */
|
|
|
|
#define SET_LDOUBLE_MSW64(d,v) \
|
|
do { \
|
|
ieee854_long_double_shape_type sh_u; \
|
|
sh_u.value = (d); \
|
|
sh_u.parts64.msw = (v); \
|
|
(d) = sh_u.value; \
|
|
} while (0)
|
|
|
|
/* Get the least significant 64 bits of a long double mantissa. */
|
|
|
|
#define GET_LDOUBLE_LSW64(v,d) \
|
|
do { \
|
|
ieee854_long_double_shape_type sh_u; \
|
|
sh_u.value = (d); \
|
|
(v) = sh_u.parts64.lsw; \
|
|
} while (0)
|
|
|
|
/*
|
|
On a platform already supporting a binary128 long double,
|
|
_Float128 will alias to long double. This transformation
|
|
makes aliasing *l functions to *f128 trivial.
|
|
*/
|
|
#define _Float128 long double
|
|
#define L(x) x##L
|
|
|
|
#endif /* math_ldbl.h */
|