diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/s_llround.c')
| -rw-r--r-- | sysdeps/powerpc/fpu/s_llround.c | 33 |
1 files changed, 16 insertions, 17 deletions
diff --git a/sysdeps/powerpc/fpu/s_llround.c b/sysdeps/powerpc/fpu/s_llround.c index 9a01826539..995d0a724a 100644 --- a/sysdeps/powerpc/fpu/s_llround.c +++ b/sysdeps/powerpc/fpu/s_llround.c @@ -19,29 +19,28 @@ #include <math.h> #include <math_ldbl_opt.h> -/* I think that what this routine is supposed to do is round a value - to the nearest integer, with values exactly on the boundary rounded - away from zero. */ -/* This routine relies on (long long)x, when x is out of range of a long long, - clipping to MAX_LLONG or MIN_LLONG. */ +/* Round to the nearest integer, with values exactly on a 0.5 boundary + rounded away from zero, regardless of the current rounding mode. + If (long long)x, when x is out of range of a long long, clips at + LLONG_MAX or LLONG_MIN, then this implementation also clips. */ long long int __llround (double x) { - double xrf; - long long int xr; - xr = (long long int) x; - xrf = (double) xr; + long long xr = (long long) x; + double xrf = (double) xr; + if (x >= 0.0) - if (x - xrf >= 0.5 && x - xrf < 1.0 && x+1 > 0) - return x+1; - else - return x; + { + if (x - xrf >= 0.5) + xr += (long long) ((unsigned long long) xr + 1) > 0; + } else - if (xrf - x >= 0.5 && xrf - x < 1.0 && x-1 < 0) - return x-1; - else - return x; + { + if (xrf - x >= 0.5) + xr -= (long long) ((unsigned long long) xr - 1) < 0; + } + return xr; } weak_alias (__llround, llround) #ifdef NO_LONG_DOUBLE |