diff options
Diffstat (limited to 'sysdeps/ieee754/flt-32/s_lrintf.c')
| -rw-r--r-- | sysdeps/ieee754/flt-32/s_lrintf.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/sysdeps/ieee754/flt-32/s_lrintf.c b/sysdeps/ieee754/flt-32/s_lrintf.c index 7581a8d286..3b480a2107 100644 --- a/sysdeps/ieee754/flt-32/s_lrintf.c +++ b/sysdeps/ieee754/flt-32/s_lrintf.c @@ -1,6 +1,6 @@ /* Round argument to nearest integral value according to current rounding direction. - 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. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. @@ -18,9 +18,12 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ +#include <fenv.h> +#include <limits.h> #include <math.h> #include <math_private.h> +#include <fix-fp-int-convert-overflow.h> static const float two23[2] = { @@ -34,7 +37,7 @@ __lrintf (float x) { int32_t j0; u_int32_t i0; - volatile float w; + float w; float t; long int result; int sx; @@ -52,7 +55,7 @@ __lrintf (float x) result = (long int) i0 << (j0 - 23); else { - w = two23[sx] + x; + w = math_narrow_eval (two23[sx] + x); t = w - two23[sx]; GET_FLOAT_WORD (i0, t); j0 = ((i0 >> 23) & 0xff) - 0x7f; @@ -64,8 +67,16 @@ __lrintf (float x) } else { - /* The number is too large. It is left implementation defined - what happens. */ +#ifdef FE_INVALID + /* The number is too large. Unless it rounds to LONG_MIN, + FE_INVALID must be raised and the return value is + unspecified. */ + if (FIX_FLT_LONG_CONVERT_OVERFLOW && x != (float) LONG_MIN) + { + feraiseexcept (FE_INVALID); + return sx == 0 ? LONG_MAX : LONG_MIN; + } +#endif return (long int) x; } |