diff options
Diffstat (limited to 'math/s_clogl.c')
| -rw-r--r-- | math/s_clogl.c | 29 |
1 files changed, 20 insertions, 9 deletions
diff --git a/math/s_clogl.c b/math/s_clogl.c index a393b88a5f..d98a3c02c1 100644 --- a/math/s_clogl.c +++ b/math/s_clogl.c @@ -41,21 +41,21 @@ __clogl (__complex__ long double x) { /* Neither real nor imaginary part is NaN. */ long double absx = fabsl (__real__ x), absy = fabsl (__imag__ x); - long double d; int scale = 0; + if (absx < absy) + { + long double t = absx; + absx = absy; + absy = t; + } + if (absx > LDBL_MAX / 2.0L) { scale = -1; absx = __scalbnl (absx, scale); absy = (absy >= LDBL_MIN * 2.0L ? __scalbnl (absy, scale) : 0.0L); } - else if (absy > LDBL_MAX / 2.0L) - { - scale = -1; - absx = (absx >= LDBL_MIN * 2.0L ? __scalbnl (absx, scale) : 0.0L); - absy = __scalbnl (absy, scale); - } else if (absx < LDBL_MIN && absy < LDBL_MIN) { scale = LDBL_MANT_DIG; @@ -63,9 +63,20 @@ __clogl (__complex__ long double x) absy = __scalbnl (absy, scale); } - d = __ieee754_hypotl (absx, absy); + if (absx == 1.0L && scale == 0) + { + long double absy2 = absy * absy; + if (absy2 <= LDBL_MIN * 2.0L) + __real__ result = absy2 / 2.0L - absy2 * absy2 / 4.0L; + else + __real__ result = __log1pl (absy2) / 2.0L; + } + else + { + long double d = __ieee754_hypotl (absx, absy); + __real__ result = __ieee754_logl (d) - scale * M_LN2l; + } - __real__ result = __ieee754_logl (d) - scale * M_LN2l; __imag__ result = __ieee754_atan2l (__imag__ x, __real__ x); } else |