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Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/fpu/s_fmaxl.S')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/fpu/s_fmaxl.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/fpu/s_fmaxl.S b/REORG.TODO/sysdeps/x86_64/fpu/s_fmaxl.S new file mode 100644 index 0000000000..2d3321fce4 --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/fpu/s_fmaxl.S @@ -0,0 +1,58 @@ +/* Compute maximum of two numbers, regarding NaN as missing argument. + Copyright (C) 1997-2017 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. + + 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 + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + .text +ENTRY(__fmaxl) + fldt 8(%rsp) // x + fldt 24(%rsp) // x : y + + fucomi %st(1), %st + jp 2f + fcmovb %st(1), %st + + fstp %st(1) + + ret + +2: // Unordered. + fucomi %st(0), %st + jp 3f + // st(1) is a NaN; st(0) is not. Test if st(1) is signaling. + testb $0x40, 15(%rsp) + jz 4f + fstp %st(1) + ret + +3: // st(0) is a NaN; st(1) may or may not be. + fxch + fucomi %st(0), %st + jp 4f + // st(1) is a NaN; st(0) is not. Test if st(1) is signaling. + testb $0x40, 31(%rsp) + jz 4f + fstp %st(1) + ret + +4: // Both arguments are NaNs, or one is a signaling NaN. + faddp + ret +END(__fmaxl) +weak_alias (__fmaxl, fmaxl) |