diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_csqrt.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_csqrt.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_csqrt.c b/sysdeps/libm-ieee754/s_csqrt.c index c5c609bd8c..cda23c702d 100644 --- a/sysdeps/libm-ieee754/s_csqrt.c +++ b/sysdeps/libm-ieee754/s_csqrt.c @@ -84,6 +84,7 @@ __csqrt (__complex__ double x) } else { +#if 0 /* FIXME: this is broken. */ __complex__ double q; double t, r; @@ -99,6 +100,15 @@ __csqrt (__complex__ double x) /* Heron iteration in complex arithmetic. */ res = 0.5 * (q + q / x); +#else + double d, imag; + + d = __ieee754_hypot (__real__ x, __imag__ x); + imag = __ieee754_sqrt (0.5 * (d - __real__ x)); + + __real__ res = __ieee754_sqrt (0.5 * (d + __real__ x)); + __imag__ res = __copysign (imag, __imag__ x); +#endif } } |