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| author | Danny Smith <dannysmith@users.sourceforge.net> | 2002-06-13 10:20:48 +0000 |
|---|---|---|
| committer | Danny Smith <dannysmith@users.sourceforge.net> | 2002-06-13 10:20:48 +0000 |
| commit | dc8971488e7c174ab4084cbdb0a8f12c39b738d7 (patch) | |
| tree | d679387fa379b6d5feb9756bdd7237347614453b /winsup/mingw/mingwex/trunc.c | |
| parent | 5f74ae83e5fba1ceb73a8d822cbe2b48c619127f (diff) | |
| download | cygnal-dc8971488e7c174ab4084cbdb0a8f12c39b738d7.tar.gz cygnal-dc8971488e7c174ab4084cbdb0a8f12c39b738d7.tar.bz2 cygnal-dc8971488e7c174ab4084cbdb0a8f12c39b738d7.zip | |
* include/_mingw.h: Increment version to 2.0.
* Makefile.in: Ditto.
Merge in mingwex branch.
Diffstat (limited to 'winsup/mingw/mingwex/trunc.c')
| -rw-r--r-- | winsup/mingw/mingwex/trunc.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/winsup/mingw/mingwex/trunc.c b/winsup/mingw/mingwex/trunc.c new file mode 100644 index 000000000..2b9931255 --- /dev/null +++ b/winsup/mingw/mingwex/trunc.c @@ -0,0 +1,17 @@ +#include <fenv.h> +#include <math.h> + +double +trunc (double _x){ + double retval; + unsigned short saved_cw; + __asm__ ("fnstcw %0;": "=m" (saved_cw)); /* save FPU control word */ + __asm__ ("fldcw %0;" + : + : "m" ((saved_cw & ~(FE_TONEAREST | FE_DOWNWARD | FE_UPWARD + | FE_TOWARDZERO)) | FE_TOWARDZERO) + ); + __asm__ ("frndint;" : "=t" (retval) : "0" (_x)); /* round towards zero */ + __asm__ ("fldcw %0;" : : "m" (saved_cw) ); /* restore saved control word */ + return retval; +} |