glibc/sysdeps/riscv/rvf/s_rintf.c
Paul Eggert 2b778ceb40 Update copyright dates with scripts/update-copyrights
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 6694 files FOO.
I then removed trailing white space from benchtests/bench-pthread-locks.c
and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this
diagnostic from Savannah:
remote: *** pre-commit check failed ...
remote: *** error: lines with trailing whitespace found
remote: error: hook declined to update refs/heads/master
2021-01-02 12:17:34 -08:00

54 lines
1.4 KiB
C

/* rintf(). RISC-V version.
Copyright (C) 2017-2021 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/>. */
#define NO_MATH_REDIRECT
#include <math.h>
#include <stdbool.h>
#include <libm-alias-float.h>
#include <stdint.h>
float
__rintf (float x)
{
bool nan;
float mag;
nan = isnan (x);
mag = fabsf (x);
if (nan)
return x + x;
if (mag < (1 << __FLT_MANT_DIG__))
{
int32_t i;
float new_x;
asm ("fcvt.w.s %0, %1" : "=r" (i) : "f" (x));
asm ("fcvt.s.w %0, %1" : "=f" (new_x) : "r" (i));
/* rint(-0) == -0, and in general we'll always have the same
sign as our input. */
x = copysignf (new_x, x);
}
return x;
}
libm_alias_float (__rint, rint)