diff options
Diffstat (limited to 'sysdeps/libm-ieee754/s_csinh.c')
| -rw-r--r-- | sysdeps/libm-ieee754/s_csinh.c | 41 |
1 files changed, 21 insertions, 20 deletions
diff --git a/sysdeps/libm-ieee754/s_csinh.c b/sysdeps/libm-ieee754/s_csinh.c index aab041bdf9..05cec85e7c 100644 --- a/sysdeps/libm-ieee754/s_csinh.c +++ b/sysdeps/libm-ieee754/s_csinh.c @@ -21,32 +21,38 @@ #include <complex.h> #include <math.h> +#include "math_private.h" + __complex__ double __csinh (__complex__ double x) { __complex__ double retval; int negate = signbit (__real__ x); + int rcls = fpclassify (__real__ x); + int icls = fpclassify (__imag__ x); __real__ x = fabs (__real__ x); - if (isfinite (__real__ x)) + if (rcls >= FP_ZERO) { - if (isfinite (__imag__ x)) + /* Real part is finite. */ + if (icls >= FP_ZERO) { - double exp_val = __exp (__real__ x); - double rec_exp_val = 1.0 / exp_val; + /* Imaginary part is finite. */ + double sinh_val = __ieee754_sinh (__real__ x); - __real__ retval = 0.5 * (exp_val - rec_exp_val) * __cos (__imag__ x); - __imag__ retval = 0.5 * (exp_val - rec_exp_val) * __sin (__imag__ x); + __real__ retval = sinh_val * __cos (__imag__ x); + __imag__ retval = sinh_val * __sin (__imag__ x); if (negate) __real__ retval = -__real__ retval; } else { - if (__real__ x == 0) + if (rcls == FP_ZERO) { + /* Real part is 0.0. */ __real__ retval = __copysign (0.0, negate ? -1.0 : 1.0); __imag__ retval = __nan ("") + __nan (""); } @@ -57,15 +63,18 @@ __csinh (__complex__ double x) } } } - else if (__isinf (__real__ x)) + else if (rcls == FP_INFINITE) { - if (__imag__ x == 0.0) + /* Real part is infinite. */ + if (icls == FP_ZERO) { + /* Imaginary part is 0.0. */ __real__ retval = negate ? -HUGE_VAL : HUGE_VAL; __imag__ retval = __imag__ x; } - else if (isfinite (__imag__ x)) + else if (icls > FP_ZERO) { + /* Imaginary part is finite. */ __real__ retval = __copysign (HUGE_VAL, __cos (__imag__ x)); __imag__ retval = __copysign (HUGE_VAL, __sin (__imag__ x)); @@ -81,16 +90,8 @@ __csinh (__complex__ double x) } else { - if (__imag__ x == 0.0) - { - __real__ retval = __nan (""); - __imag__ retval = __imag__ x; - } - else - { - __real__ retval = __nan (""); - __imag__ retval = __nan (""); - } + __real__ retval = __nan (""); + __imag__ retval = __imag__ x == 0.0 ? __imag__ x : __nan (""); } return retval; |