diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/fpu/s_llrint.c')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/fpu/s_llrint.c | 33 |
1 files changed, 31 insertions, 2 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_llrint.c b/sysdeps/powerpc/powerpc32/fpu/s_llrint.c index 48af9eb726..9cb72a1fd6 100644 --- a/sysdeps/powerpc/powerpc32/fpu/s_llrint.c +++ b/sysdeps/powerpc/powerpc32/fpu/s_llrint.c @@ -1,5 +1,5 @@ /* Round a double value to a long long in the current rounding mode. - Copyright (C) 1997-2015 Free Software Foundation, Inc. + Copyright (C) 1997-2016 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 @@ -16,13 +16,42 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <limits.h> #include <math.h> #include <math_ldbl_opt.h> +#include <math_private.h> +#include <stdint.h> long long int __llrint (double x) { - return (long long int) __rint (x); + double rx = __rint (x); + if (HAVE_PPC_FCTIDZ || rx != x) + return (long long int) rx; + else + { + /* Avoid incorrect exceptions from libgcc conversions (as of GCC + 5): <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59412>. */ + if (fabs (rx) < 0x1p31) + return (long long int) (long int) rx; + uint64_t i0; + EXTRACT_WORDS64 (i0, rx); + int exponent = ((i0 >> 52) & 0x7ff) - 0x3ff; + if (exponent < 63) + { + unsigned long long int mant + = (i0 & ((1ULL << 52) - 1)) | (1ULL << 52); + if (exponent < 52) + mant >>= 52 - exponent; + else + mant <<= exponent - 52; + return (long long int) ((i0 & (1ULL << 63)) != 0 ? -mant : mant); + } + else if (rx == (double) LLONG_MIN) + return LLONG_MIN; + else + return (long long int) (long int) rx << 32; + } } weak_alias (__llrint, llrint) #ifdef NO_LONG_DOUBLE |