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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
53 lines
1.5 KiB
ArmAsm
53 lines
1.5 KiB
ArmAsm
/* Compute maximum of two numbers, regarding NaN as missing argument.
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Copyright (C) 2002-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include <libm-alias-double.h>
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.text
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ENTRY(__fmax)
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ucomisd %xmm0, %xmm1
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jp 1f // jump if unordered
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maxsd %xmm1, %xmm0
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jmp 2f
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1: ucomisd %xmm1, %xmm1 // Is xmm1 a NaN?
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jp 3f
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// xmm0 is a NaN; xmm1 is not. Test if xmm0 is signaling.
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movsd %xmm0, -8(%rsp)
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testb $0x8, -2(%rsp)
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jz 4f
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movsd %xmm1, %xmm0 // otherwise return xmm1
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ret
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3: // xmm1 is a NaN; xmm0 may or may not be.
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ucomisd %xmm0, %xmm0
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jp 4f
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// xmm1 is a NaN; xmm0 is not. Test if xmm1 is signaling.
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movsd %xmm1, -8(%rsp)
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testb $0x8, -2(%rsp)
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jz 4f
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ret
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4: // Both arguments are NaNs, or one is a signaling NaN.
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addsd %xmm1, %xmm0
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2: ret
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END(__fmax)
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libm_alias_double (__fmax, fmax)
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