diff options
Diffstat (limited to 'sysdeps/m68k/fpu/s_cexp.c')
| -rw-r--r-- | sysdeps/m68k/fpu/s_cexp.c | 62 |
1 files changed, 48 insertions, 14 deletions
diff --git a/sysdeps/m68k/fpu/s_cexp.c b/sysdeps/m68k/fpu/s_cexp.c index d5c76453e8..4846ec10f3 100644 --- a/sysdeps/m68k/fpu/s_cexp.c +++ b/sysdeps/m68k/fpu/s_cexp.c @@ -40,18 +40,24 @@ __complex__ float_type s(__cexp) (__complex__ float_type x) { __complex__ float_type retval; - float_type sin_ix, cos_ix; if (m81(__finite) (__real__ x)) { if (m81(__finite) (__imag__ x)) { - float_type exp_val = s(__exp) (__real__ x); + float_type exp_val = m81(__ieee754_exp) (__real__ x); - __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix) - : "f" (__imag__ x)); - __real__ retval = exp_val * cos_ix; - __imag__ retval = exp_val * sin_ix; + __real__ retval = __imag__ retval = exp_val; + if (m81(__finite) (exp_val)) + { + float_type sin_ix, cos_ix; + __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix) + : "f" (__imag__ x)); + __real__ retval *= cos_ix; + __imag__ retval *= sin_ix; + } + else + goto fix_sign; } else /* If the imaginary part is +-inf or NaN and the real part is @@ -62,16 +68,41 @@ s(__cexp) (__complex__ float_type x) { if (m81(__finite) (__imag__ x)) { - if (m81(__signbit) (__real__ x) == 0 && __imag__ x == 0.0) - retval = huge_val; + float_type value = m81(__signbit) (__real__ x) ? 0.0 : huge_val; + + if (__imag__ x == 0.0) + { + __real__ retval = value; + __imag__ retval = __imag__ x; + } else { - float_type value = m81(__signbit) (__real__ x) ? 0.0 : huge_val; + float_type remainder, pi_2; + int quadrant; + __real__ retval = value; + __imag__ retval = value; - __asm ("fsincos%.x %2,%1:%0" : "=f" (sin_ix), "=f" (cos_ix) - : "f" (__imag__ x)); - __real__ retval = value * cos_ix; - __imag__ retval = value * sin_ix; + fix_sign: + __asm ("fmovecr %#0,%0\n\tfscale%.w %#-1,%0" : "=f" (pi_2)); + __asm ("fmod%.x %2,%0\n\tfmove%.l %/fpsr,%1" + : "=f" (remainder), "=dm" (quadrant) + : "f" (pi_2), "0" (__imag__ x)); + quadrant = (quadrant >> 16) & 0x83; + if (quadrant & 0x80) + quadrant ^= 0x83; + switch (quadrant) + { + default: + break; + case 1: + __real__ retval = -__real__ retval; + break; + case 2: + __real__ retval = -__real__ retval; + case 3: + __imag__ retval = -__imag__ retval; + break; + } } } else if (m81(__signbit) (__real__ x) == 0) @@ -80,7 +111,10 @@ s(__cexp) (__complex__ float_type x) __imag__ retval = 0.0/0.0; } else - retval = 0.0; + { + __real__ retval = 0.0; + __imag__ retval = s(__copysign) (0.0, __imag__ x); + } } else /* If the real part is NaN the result is NaN + iNaN. */ |