glibc/sysdeps/x86_64/fpu/s_fmin.S
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
1.6 KiB
ArmAsm

/* Compute minimum of two numbers, regarding NaN as missing argument.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 2002.
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/>. */
#include <sysdep.h>
#include <libm-alias-double.h>
.text
ENTRY(__fmin)
ucomisd %xmm0, %xmm1
jp 1f // jump if unordered
minsd %xmm1, %xmm0
jmp 2f
1: ucomisd %xmm1, %xmm1 // Is xmm1 a NaN?
jp 3f
// xmm0 is a NaN; xmm1 is not. Test if xmm0 is signaling.
movsd %xmm0, -8(%rsp)
testb $0x8, -2(%rsp)
jz 4f
movsd %xmm1, %xmm0 // otherwise return xmm1
ret
3: // xmm1 is a NaN; xmm0 may or may not be.
ucomisd %xmm0, %xmm0
jp 4f
// xmm1 is a NaN; xmm0 is not. Test if xmm1 is signaling.
movsd %xmm1, -8(%rsp)
testb $0x8, -2(%rsp)
jz 4f
ret
4: // Both arguments are NaNs, or one is a signaling NaN.
addsd %xmm1, %xmm0
2: ret
END(__fmin)
libm_alias_double (__fmin, fmin)