diff options
Diffstat (limited to 'newlib/libm/machine/i386/f_lrintf.c')
| -rw-r--r-- | newlib/libm/machine/i386/f_lrintf.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/newlib/libm/machine/i386/f_lrintf.c b/newlib/libm/machine/i386/f_lrintf.c new file mode 100644 index 000000000..da8ffa62d --- /dev/null +++ b/newlib/libm/machine/i386/f_lrintf.c @@ -0,0 +1,32 @@ +/* + * ==================================================== + * x87 FP implementation contributed to Newlib by + * Dave Korn, November 2007. This file is placed in the + * public domain. Permission to use, copy, modify, and + * distribute this software is freely granted. + * ==================================================== + */ + +#if defined(__GNUC__) && !defined(_SOFT_FLOAT) + +#include <math.h> + +/* + * Fast math version of lrintf(x) + * Return x rounded to integral value according to the prevailing + * rounding mode. + * Method: + * Using inline x87 asms. + * Exception: + * Governed by x87 FPCR. + */ + +long int _f_lrintf (float x) +{ + long int _result; + asm ("fistpl %0" : "=m" (_result) : "t" (x) : "st"); + return _result; +} + +#endif /* !__GNUC__ || _SOFT_FLOAT */ + |