diff options
Diffstat (limited to 'sysdeps/ieee754/ldbl-96')
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/s_llrintl.c | 19 | ||||
| -rw-r--r-- | sysdeps/ieee754/ldbl-96/s_lrintl.c | 55 |
2 files changed, 66 insertions, 8 deletions
diff --git a/sysdeps/ieee754/ldbl-96/s_llrintl.c b/sysdeps/ieee754/ldbl-96/s_llrintl.c index c73741e53e..e3faa21b27 100644 --- a/sysdeps/ieee754/ldbl-96/s_llrintl.c +++ b/sysdeps/ieee754/ldbl-96/s_llrintl.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> @@ -50,8 +52,21 @@ __llrintl (long double x) result = (((long long int) i0 << 32) | i1) << (j0 - 63); else { - w = two63[sx] + x; - t = w - two63[sx]; +#if defined FE_INVALID || defined FE_INEXACT + /* X < LLONG_MAX + 1 implied by J0 < 63. */ + if (x > (long double) LLONG_MAX) + { + /* In the event of overflow we must raise the "invalid" + exception, but not "inexact". */ + t = __nearbyintl (x); + feraiseexcept (t == LLONG_MAX ? FE_INEXACT : FE_INVALID); + } + else +#endif + { + w = two63[sx] + x; + t = w - two63[sx]; + } GET_LDOUBLE_WORDS (se, i0, i1, t); j0 = (se & 0x7fff) - 0x3fff; diff --git a/sysdeps/ieee754/ldbl-96/s_lrintl.c b/sysdeps/ieee754/ldbl-96/s_lrintl.c index 598423b90b..4dd1993c91 100644 --- a/sysdeps/ieee754/ldbl-96/s_lrintl.c +++ b/sysdeps/ieee754/ldbl-96/s_lrintl.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> @@ -46,8 +48,22 @@ __lrintl (long double x) if (j0 < 31) { - w = two63[sx] + x; - t = w - two63[sx]; +#if defined FE_INVALID || defined FE_INEXACT + /* X < LONG_MAX + 1 implied by J0 < 31. */ + if (sizeof (long int) == 4 + && x > (long double) LONG_MAX) + { + /* In the event of overflow we must raise the "invalid" + exception, but not "inexact". */ + t = __nearbyintl (x); + feraiseexcept (t == LONG_MAX ? FE_INEXACT : FE_INVALID); + } + else +#endif + { + w = two63[sx] + x; + t = w - two63[sx]; + } GET_LDOUBLE_WORDS (se, i0, i1, t); j0 = (se & 0x7fff) - 0x3fff; @@ -59,8 +75,22 @@ __lrintl (long double x) result = ((long int) i0 << (j0 - 31)) | (i1 << (j0 - 63)); else { - w = two63[sx] + x; - t = w - two63[sx]; +#if defined FE_INVALID || defined FE_INEXACT + /* X < LONG_MAX + 1 implied by J0 < 63. */ + if (sizeof (long int) == 8 + && x > (long double) LONG_MAX) + { + /* In the event of overflow we must raise the "invalid" + exception, but not "inexact". */ + t = __nearbyintl (x); + feraiseexcept (t == LONG_MAX ? FE_INEXACT : FE_INVALID); + } + else +#endif + { + w = two63[sx] + x; + t = w - two63[sx]; + } GET_LDOUBLE_WORDS (se, i0, i1, t); j0 = (se & 0x7fff) - 0x3fff; @@ -72,8 +102,21 @@ __lrintl (long double x) } else { - /* The number is too large. It is left implementation defined - what happens. */ + /* The number is too large. Unless it rounds to LONG_MIN, + FE_INVALID must be raised and the return value is + unspecified. */ +#if defined FE_INVALID || defined FE_INEXACT + if (sizeof (long int) == 4 + && x < (long double) LONG_MIN + && x > (long double) LONG_MIN - 1.0L) + { + /* If truncation produces LONG_MIN, the cast will not raise + the exception, but may raise "inexact". */ + t = __nearbyintl (x); + feraiseexcept (t == LONG_MIN ? FE_INEXACT : FE_INVALID); + return LONG_MIN; + } +#endif return (long int) x; } |