diff options
| author | Danny Smith <dannysmith@users.sourceforge.net> | 2004-03-29 12:22:20 +0400 |
|---|---|---|
| committer | Danny Smith <dannysmith@users.sourceforge.net> | 2004-03-29 12:22:20 +0400 |
| commit | 521a0aa9a860a74bbe45cf0422dd11baa0ac3aa8 (patch) | |
| tree | fbbe38c2acb14c0d54853f2513978127c170abb1 /winsup/mingw/mingwex/math/roundf.c | |
| parent | 20e0dcfb3ed350d961edb2222adeb608fa2f070b (diff) | |
* mingwex/math/round.c: Rewrite.
* mingwex/math/roundf.c: Rewrite.
* mingwex/math/roundl.c: Rewrite.
Diffstat (limited to 'winsup/mingw/mingwex/math/roundf.c')
| -rw-r--r-- | winsup/mingw/mingwex/math/roundf.c | 31 |
1 files changed, 5 insertions, 26 deletions
diff --git a/winsup/mingw/mingwex/math/roundf.c b/winsup/mingw/mingwex/math/roundf.c index 6ae81bdd8..b50d950a7 100644 --- a/winsup/mingw/mingwex/math/roundf.c +++ b/winsup/mingw/mingwex/math/roundf.c @@ -1,29 +1,8 @@ -#include <fenv.h> +#include <math.h> float -roundf (float x) { - double retval; - unsigned short saved_cw, _cw; - __asm__ ( - "fnstcw %0;" - : "=m" (saved_cw) - ); /* save control word */ - _cw = ~(FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO) - | (x > 0.0 ? FE_UPWARD : FE_DOWNWARD); /* round away from zero */ - __asm__ ( - "fldcw %0;" - : - : "m" (_cw) - ); /* load the rounding control */ - __asm__ ( - "frndint;" - : "=t" (retval) - : "0" (x) - ); /* do the rounding */ - __asm__ ( - "fldcw %0;" - : - : "m" (saved_cw) - ); /* restore control word */ - return retval; +roundf (float x) +{ + /* Add +/- 0.5 then then round towards zero. */ + return truncf ( x + (x >= 0.0F ? 0.5F : -0.5F)); } |