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Diffstat (limited to 'sysdeps/i386/fpu/bits/fenv.h')
-rw-r--r--sysdeps/i386/fpu/bits/fenv.h40
1 files changed, 39 insertions, 1 deletions
diff --git a/sysdeps/i386/fpu/bits/fenv.h b/sysdeps/i386/fpu/bits/fenv.h
index ef3fcb3..e11e83f 100644
--- a/sysdeps/i386/fpu/bits/fenv.h
+++ b/sysdeps/i386/fpu/bits/fenv.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1998, 1999, 2000, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -88,3 +88,41 @@ fenv_t;
/* Floating-point environment where none of the exception is masked. */
# define FE_NOMASK_ENV ((__const fenv_t *) -2)
#endif
+
+
+#if defined __SSE_MATH__ && defined __USE_EXTERN_INLINES
+__BEGIN_DECLS
+
+/* Optimized versions. */
+extern int __REDIRECT_NTH (__feraiseexcept_renamed, (int), feraiseexcept);
+__extern_inline int
+__NTH (feraiseexcept (int __excepts))
+{
+ if (__builtin_constant_p (__excepts)
+ && (__excepts & ~(FE_INVALID | FE_DIVBYZERO)) == 0)
+ {
+ if ((FE_INVALID & __excepts) != 0)
+ {
+ /* One example of a invalid operation is 0.0 / 0.0. */
+ float __f = 0.0;
+
+ __asm__ __volatile__ ("divss %0, %0 " : : "x" (__f));
+ (void) &__f;
+ }
+ if ((FE_DIVBYZERO & __excepts) != 0)
+ {
+ float __f = 1.0;
+ float __g = 0.0;
+
+ __asm__ __volatile__ ("divss %1, %0" : : "x" (__f), "x" (__g));
+ (void) &__f;
+ }
+
+ return 0;
+ }
+
+ return __feraiseexcept_renamed (__excepts);
+}
+
+__END_DECLS
+#endif