diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-128')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_llroundl.c | 25 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_lroundl.c | 32 |
2 files changed, 53 insertions, 4 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_llroundl.c b/sysdeps/ieee754/ldbl-128/s_llroundl.c index 4adc50eaa4..235a433dbe 100644 --- a/sysdeps/ieee754/ldbl-128/s_llroundl.c +++ b/sysdeps/ieee754/ldbl-128/s_llroundl.c @@ -18,6 +18,8 @@ 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> @@ -60,13 +62,30 @@ __llroundl (long double x) if (j0 == 48) result = (long long int) i0; else - result = ((long long int) i0 << (j0 - 48)) | (j >> (112 - j0)); + { + result = ((long long int) i0 << (j0 - 48)) | (j >> (112 - j0)); +#ifdef FE_INVALID + if (sign == 1 && result == LLONG_MIN) + /* Rounding brought the value out of range. */ + feraiseexcept (FE_INVALID); +#endif + } } } else { - /* The number is too large. It is left implementation defined - what happens. */ + /* The number is too large. Unless it rounds to LLONG_MIN, + FE_INVALID must be raised and the return value is + unspecified. */ +#ifdef FE_INVALID + if (x <= (long double) LLONG_MIN - 0.5L) + { + /* If truncation produces LLONG_MIN, the cast will not raise + the exception, but may raise "inexact". */ + feraiseexcept (FE_INVALID); + return LLONG_MIN; + } +#endif return (long long int) x; } diff --git a/sysdeps/ieee754/ldbl-128/s_lroundl.c b/sysdeps/ieee754/ldbl-128/s_lroundl.c index 64b285e291..3c6d26abe1 100644 --- a/sysdeps/ieee754/ldbl-128/s_lroundl.c +++ b/sysdeps/ieee754/ldbl-128/s_lroundl.c @@ -18,6 +18,8 @@ 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> @@ -47,6 +49,13 @@ __lroundl (long double x) { i0 += 0x0000800000000000LL >> j0; result = i0 >> (48 - j0); +#ifdef FE_INVALID + if (sizeof (long int) == 4 + && sign == 1 + && result == LONG_MIN) + /* Rounding brought the value out of range. */ + feraiseexcept (FE_INVALID); +#endif } } else if (j0 >= 112) @@ -60,11 +69,32 @@ __lroundl (long double x) if (j0 == 48) result = (long int) i0; else - result = ((long int) i0 << (j0 - 48)) | (j >> (112 - j0)); + { + result = ((long int) i0 << (j0 - 48)) | (j >> (112 - j0)); +#ifdef FE_INVALID + if (sizeof (long int) == 8 + && sign == 1 + && result == LONG_MIN) + /* Rounding brought the value out of range. */ + feraiseexcept (FE_INVALID); +#endif + } } } else { + /* The number is too large. Unless it rounds to LONG_MIN, + FE_INVALID must be raised and the return value is + unspecified. */ +#ifdef FE_INVALID + if (x <= (long double) LONG_MIN - 0.5L) + { + /* If truncation produces LONG_MIN, the cast will not raise + the exception, but may raise "inexact". */ + feraiseexcept (FE_INVALID); + return LONG_MIN; + } +#endif /* The number is too large. It is left implementation defined what happens. */ return (long int) x; |