diff options
Diffstat (limited to 'sysdeps/i386/fpu/feenablxcpt.c')
| -rw-r--r-- | sysdeps/i386/fpu/feenablxcpt.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/sysdeps/i386/fpu/feenablxcpt.c b/sysdeps/i386/fpu/feenablxcpt.c index a672d0e821..65a0a2944c 100644 --- a/sysdeps/i386/fpu/feenablxcpt.c +++ b/sysdeps/i386/fpu/feenablxcpt.c @@ -1,5 +1,5 @@ /* Enable floating-point exceptions. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. + Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Andreas Jaeger <aj@suse.de>, 1999. @@ -19,11 +19,15 @@ 02111-1307 USA. */ #include <fenv.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> int feenableexcept (int excepts) { - unsigned short int new_exc, old_exc; + unsigned short int new_exc; + unsigned short int old_exc; /* Get the current control word. */ __asm__ ("fstcw %0" : "=m" (*&new_exc)); @@ -34,5 +38,18 @@ feenableexcept (int excepts) new_exc &= ~excepts; __asm__ ("fldcw %0" : : "m" (*&new_exc)); + /* If the CPU supports SSE we set the MXCSR as well. */ + if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0) + { + unsigned int xnew_exc; + + /* Get the current control word. */ + __asm__ ("ldmxcsr %0" : "=m" (*&xnew_exc)); + + xnew_exc &= ~excepts; + + __asm__ ("stmxcsr %0" : : "m" (*&xnew_exc)); + } + return old_exc; } |