diff options
Diffstat (limited to 'sysdeps/powerpc/fpu/s_llround.c')
| -rw-r--r-- | sysdeps/powerpc/fpu/s_llround.c | 39 |
1 files changed, 21 insertions, 18 deletions
diff --git a/sysdeps/powerpc/fpu/s_llround.c b/sysdeps/powerpc/fpu/s_llround.c index c30400b3ed..b0c6cb7c18 100644 --- a/sysdeps/powerpc/fpu/s_llround.c +++ b/sysdeps/powerpc/fpu/s_llround.c @@ -1,5 +1,5 @@ /* Round double value to long long int. - Copyright (C) 1997 Free Software Foundation, Inc. + Copyright (C) 1997-2014 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -17,33 +17,36 @@ <http://www.gnu.org/licenses/>. */ #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 strong_alias (__llround, __llroundl) weak_alias (__llround, llroundl) #endif +#if LONG_DOUBLE_COMPAT (libm, GLIBC_2_1) +compat_symbol (libm, __llround, llroundl, GLIBC_2_1); +#endif |