diff options
Diffstat (limited to 'sysdeps/i386/i686/fpu/s_fmaxl.S')
| -rw-r--r-- | sysdeps/i386/i686/fpu/s_fmaxl.S | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/sysdeps/i386/i686/fpu/s_fmaxl.S b/sysdeps/i386/i686/fpu/s_fmaxl.S index e5dcd26923..c9c62c71c8 100644 --- a/sysdeps/i386/i686/fpu/s_fmaxl.S +++ b/sysdeps/i386/i686/fpu/s_fmaxl.S @@ -1,5 +1,5 @@ /* Compute maximum of two numbers, regarding NaN as missing argument. - Copyright (C) 1997-2016 Free Software Foundation, Inc. + Copyright (C) 1997-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -18,22 +18,42 @@ <http://www.gnu.org/licenses/>. */ #include <sysdep.h> +#include <libm-alias-ldouble.h> .text ENTRY(__fmaxl) fldt 4(%esp) // x fldt 16(%esp) // x : y - fucomi %st(0), %st - fcmovu %st(1), %st // now %st contains y if not NaN, x otherwise - - fxch - 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, 11(%esp) + 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, 23(%esp) + 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) +libm_alias_ldouble (__fmax, fmax) |