diff options
Diffstat (limited to 'libm/e_sqrt.c')
-rw-r--r-- | libm/e_sqrt.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/libm/e_sqrt.c b/libm/e_sqrt.c index 884214dff..05e255c2f 100644 --- a/libm/e_sqrt.c +++ b/libm/e_sqrt.c @@ -181,6 +181,25 @@ double attribute_hidden __ieee754_sqrt(double x) } /* + * wrapper sqrt(x) + */ +#ifndef _IEEE_LIBM +double sqrt(double x) +{ + double z = __ieee754_sqrt(x); + if (_LIB_VERSION == _IEEE_ || isnan(x)) + return z; + if (x < 0.0) + return __kernel_standard(x, x, 26); /* sqrt(negative) */ + return z; +} +#else +strong_alias(__ieee754_sqrt, sqrt) +#endif +libm_hidden_def(sqrt) + + +/* Other methods (use floating-point arithmetic) ------------- (This is a copy of a drafted paper by Prof W. Kahan @@ -436,4 +455,3 @@ B. sqrt(x) by Reciproot Iteration (4) Special cases (see (4) of Section A). */ - |