diff options
| author | zimmerma <zimmerma@280ebfd0-de03-0410-8827-d642c229c3f4> | 1999-10-08 15:25:42 +0000 |
|---|---|---|
| committer | zimmerma <zimmerma@280ebfd0-de03-0410-8827-d642c229c3f4> | 1999-10-08 15:25:42 +0000 |
| commit | 3188589dd37e83b26d626c49af047b6ffffe4763 (patch) | |
| tree | cc0a4ba4ba66f43b0204f10f64afd6a11af9cbbe /rnd_mode.c | |
| parent | edebccfb70456ffc1d0ca97e2e5d82173a6a867e (diff) | |
| download | mpfr-3188589dd37e83b26d626c49af047b6ffffe4763.tar.gz | |
now use macros for Linux case, and added ifdef for _ISOC9X_SOURCE
git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@385 280ebfd0-de03-0410-8827-d642c229c3f4
Diffstat (limited to 'rnd_mode.c')
| -rw-r--r-- | rnd_mode.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/rnd_mode.c b/rnd_mode.c index e457d3c85..47ab55466 100644 --- a/rnd_mode.c +++ b/rnd_mode.c @@ -23,11 +23,14 @@ MA 02111-1307, USA. */ #include "gmp.h" #include "mpfr.h" -/* functions to set/get the machine rounding mode, - this should use the interface from the ISO C9X draft - (file <fenv.h>) */ - -#ifdef IRIX64 +/* functions to set/get the machine rounding mode */ +#ifdef _ISOC9X_SOURCE +#include <fenv.h> +#define TONEAREST fesetround(FE_TONEAREST) +#define TOZERO fesetround(FE_TOWARDZERO) +#define TOINFP fesetround(FE_UPWARD) +#define TOINFM fesetround(FE_DOWNWARD) +#elif IRIX64 #include <sys/fpu.h> extern int swapRM(); #define TOZERO swapRM(ROUND_TO_ZERO) @@ -75,13 +78,14 @@ char *out; #ifdef LIBC211 #define __setfpucw(cw) __asm__ ("fldcw %0" : : "m" (cw)) #endif -/* be careful to put bits 9-8 (Precision control) - to 10 (round to double precision) instead of the - default 11 (round to extended precision) */ -#define TOZERO __setfpucw(0x1e7f) -#define TOINFP __setfpucw(0x1a7f) -#define TOINFM __setfpucw(0x167f) -#define TONEAREST __setfpucw(0x127f) +/* be careful to put Precision control bits + to round to double precision instead of the + default (round to extended precision) */ +#define _fpu_ieee ((_FPU_DEFAULT & (~_FPU_EXTENDED)) | _FPU_DOUBLE) +#define TOZERO __setfpucw(_fpu_ieee | _FPU_RC_ZERO) +#define TOINFP __setfpucw(_fpu_ieee | _FPU_RC_UP) +#define TOINFM __setfpucw(_fpu_ieee | _FPU_RC_DOWN) +#define TONEAREST __setfpucw(_fpu_ieee) #endif /* sets the machine rounding mode to the value rnd_mode */ |