diff options
Diffstat (limited to 'libm/upstream-freebsd/lib/msun/src/s_round.c')
| -rw-r--r-- | libm/upstream-freebsd/lib/msun/src/s_round.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/libm/upstream-freebsd/lib/msun/src/s_round.c b/libm/upstream-freebsd/lib/msun/src/s_round.c index 65de31b..fab3019 100644 --- a/libm/upstream-freebsd/lib/msun/src/s_round.c +++ b/libm/upstream-freebsd/lib/msun/src/s_round.c @@ -27,25 +27,34 @@ #include <sys/cdefs.h> __FBSDID("$FreeBSD$"); -#include <math.h> +#include <float.h> + +#include "math.h" +#include "math_private.h" double round(double x) { double t; + uint32_t hx; - if (!isfinite(x)) - return (x); + GET_HIGH_WORD(hx, x); + if ((hx & 0x7fffffff) == 0x7ff00000) + return (x + x); - if (x >= 0.0) { + if (!(hx & 0x80000000)) { t = floor(x); if (t - x <= -0.5) - t += 1.0; + t += 1; return (t); } else { t = floor(-x); if (t + x <= -0.5) - t += 1.0; + t += 1; return (-t); } } + +#if (LDBL_MANT_DIG == 53) +__weak_reference(round, roundl); +#endif |