diff options
Diffstat (limited to 'REORG.TODO/sysdeps/i386/fpu/s_fminl.S')
-rw-r--r-- | REORG.TODO/sysdeps/i386/fpu/s_fminl.S | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/i386/fpu/s_fminl.S b/REORG.TODO/sysdeps/i386/fpu/s_fminl.S new file mode 100644 index 0000000000..12ef21fda9 --- /dev/null +++ b/REORG.TODO/sysdeps/i386/fpu/s_fminl.S @@ -0,0 +1,71 @@ +/* Compute minimum 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(__fminl) + fldt 16(%esp) // y + fxam + fnstsw + fldt 4(%esp) // y : x + + andb $0x45, %ah + cmpb $0x01, %ah + je 2f // y == NaN + + fxam + fnstsw + andb $0x45, %ah + cmpb $0x01, %ah + je 3f // x == NaN + + fucom %st(1) + fnstsw + sahf + jc 1f + + fxch %st(1) +1: fstp %st(1) + + ret + +2: // st(1) is a NaN; st(0) may or may not be. + fxam + fnstsw + andb $0x45, %ah + cmpb $0x01, %ah + je 4f + // st(1) is a NaN; st(0) is not. Test if st(1) is signaling. + testb $0x40, 23(%esp) + jz 4f + fstp %st(1) + ret + +3: // st(0) is a NaN; st(1) is not. Test if st(0) is signaling. + testb $0x40, 11(%esp) + jz 4f + fstp %st(0) + ret + +4: // Both arguments are NaNs, or one is a signaling NaN. + faddp + ret +END(__fminl) +weak_alias (__fminl, fminl) |