diff options
Diffstat (limited to 'sysdeps/ieee754/k_standard.c')
| -rw-r--r-- | sysdeps/ieee754/k_standard.c | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/sysdeps/ieee754/k_standard.c b/sysdeps/ieee754/k_standard.c index 22300652e9..6def34bc0c 100644 --- a/sysdeps/ieee754/k_standard.c +++ b/sysdeps/ieee754/k_standard.c @@ -88,6 +88,8 @@ static double zero = 0.0; /* used as const */ * 45-- exp2 underflow * 46-- exp10 overflow * 47-- exp10 underflow + * 48-- log2(0) + * 49-- log2(x<0) */ @@ -937,7 +939,42 @@ static double zero = 0.0; /* used as const */ __set_errno (ERANGE); } break; - /* #### Last used is 47/147/247 ### */ + case 48: + case 148: + case 248: + /* log2(0) */ + exc.type = SING; + exc.name = type < 100 ? "log2" : (type < 200 + ? "log2f" : "log2l"); + if (_LIB_VERSION == _SVID_) + exc.retval = -HUGE; + else + exc.retval = -HUGE_VAL; + if (_LIB_VERSION == _POSIX_) + __set_errno (ERANGE); + else if (!matherr(&exc)) { + __set_errno (EDOM); + } + break; + case 49: + case 149: + case 249: + /* log2(x<0) */ + exc.type = DOMAIN; + exc.name = type < 100 ? "log2" : (type < 200 + ? "log2f" : "log2l"); + if (_LIB_VERSION == _SVID_) + exc.retval = -HUGE; + else + exc.retval = NAN; + if (_LIB_VERSION == _POSIX_) + __set_errno (EDOM); + else if (!matherr(&exc)) { + __set_errno (EDOM); + } + break; + + /* #### Last used is 49/149/249 ### */ } return exc.retval; } |