diff options
Diffstat (limited to 'sysdeps/ieee754')
| -rw-r--r-- | sysdeps/ieee754/ldbl-128/s_atanl.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/sysdeps/ieee754/ldbl-128/s_atanl.c b/sysdeps/ieee754/ldbl-128/s_atanl.c index 0138e792aa..adac0a79e7 100644 --- a/sysdeps/ieee754/ldbl-128/s_atanl.c +++ b/sysdeps/ieee754/ldbl-128/s_atanl.c @@ -167,6 +167,7 @@ static const long double q4 = 2.173623741810414221251136181221172551416E1L; /* q5 = 1.000000000000000000000000000000000000000E0 */ +static const long double huge = 1.0e4930L; long double __atanl (long double x) @@ -197,6 +198,22 @@ __atanl (long double x) return atantbl[83]; } + if (k <= 0x3fc50000) /* |x| < 2**-58 */ + { + /* Raise inexact. */ + if (huge + x > 0.0) + return x; + } + + if (k >= 0x40720000) /* |x| > 2**115 */ + { + /* Saturate result to {-,+}pi/2 */ + if (sign) + return -atantbl[83]; + else + return atantbl[83]; + } + if (sign) x = -x; |