diff options
| author | gcc <gcc@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2006-08-17 01:18:26 +0000 |
|---|---|---|
| committer | gcc <gcc@7b3dc134-2b1b-0410-93df-9e9f96275f8d> | 2006-08-17 01:18:26 +0000 |
| commit | 15f34685e7a9b5caf761af2ebf6afa20438d440b (patch) | |
| tree | dc04ce3cdf040f198743c15b64557824de174680 /libc/sysdeps/i386/fpu/s_ilogbf.S | |
| parent | 1e848e0e775a36f6359161f5deb890942ef42ff3 (diff) | |
| download | eglibc2-15f34685e7a9b5caf761af2ebf6afa20438d440b.tar.gz | |
Import glibc-mainline for 2006-08-16
git-svn-id: svn://svn.eglibc.org/fsf/trunk@4 7b3dc134-2b1b-0410-93df-9e9f96275f8d
Diffstat (limited to 'libc/sysdeps/i386/fpu/s_ilogbf.S')
| -rw-r--r-- | libc/sysdeps/i386/fpu/s_ilogbf.S | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/libc/sysdeps/i386/fpu/s_ilogbf.S b/libc/sysdeps/i386/fpu/s_ilogbf.S new file mode 100644 index 000000000..99e53edd7 --- /dev/null +++ b/libc/sysdeps/i386/fpu/s_ilogbf.S @@ -0,0 +1,38 @@ +/* + * Written by J.T. Conklin <jtc@netbsd.org>. + * Public domain. + */ + +#include <machine/asm.h> + +RCSID("$NetBSD: s_ilogbf.S,v 1.4 1995/10/22 20:32:43 pk Exp $") + +ENTRY(__ilogbf) + flds 4(%esp) +/* I added the following ugly construct because ilogb(+-Inf) is + required to return INT_MAX in ISO C99. + -- jakub@redhat.com. */ + fxam /* Is NaN or +-Inf? */ + fstsw %ax + movb $0x45, %dh + andb %ah, %dh + cmpb $0x05, %dh + je 1f /* Is +-Inf, jump. */ + + fxtract + pushl %eax + cfi_adjust_cfa_offset (4) + fstp %st + + fistpl (%esp) + fwait + popl %eax + cfi_adjust_cfa_offset (-4) + + ret + +1: fstp %st + movl $0x7fffffff, %eax + ret +END (__ilogbf) +weak_alias (__ilogbf, ilogbf) |