diff options
Diffstat (limited to 'sysdeps/i386/fpu/fesetround.c')
| -rw-r--r-- | sysdeps/i386/fpu/fesetround.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/sysdeps/i386/fpu/fesetround.c b/sysdeps/i386/fpu/fesetround.c index 342ae49c60..342ed42318 100644 --- a/sysdeps/i386/fpu/fesetround.c +++ b/sysdeps/i386/fpu/fesetround.c @@ -1,5 +1,5 @@ /* Set current rounding direction. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997, 2003 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -19,6 +19,9 @@ 02111-1307 USA. */ #include <fenv.h> +#include <unistd.h> +#include <ldsodefs.h> +#include <dl-procinfo.h> int fesetround (int round) @@ -34,5 +37,16 @@ fesetround (int round) cw |= round; __asm__ ("fldcw %0" : : "m" (*&cw)); + /* If the CPU supports SSE we set the MXCSR as well. */ + if ((GL(dl_hwcap_mask) & HWCAP_I386_XMM) != 0) + { + unsigned int xcw; + + __asm__ ("stmxcsr %0" : "=m" (*&xcw)); + cw &= ~0x6000; + cw |= round << 3; + __asm__ ("ldmxcsr %0" : : "m" (*&xcw)); + } + return 0; } |