diff options
Diffstat (limited to 'libgo/go/math/cmplx/sin.go')
| -rw-r--r-- | libgo/go/math/cmplx/sin.go | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/libgo/go/math/cmplx/sin.go b/libgo/go/math/cmplx/sin.go index 2c57536..febac0e 100644 --- a/libgo/go/math/cmplx/sin.go +++ b/libgo/go/math/cmplx/sin.go @@ -51,6 +51,19 @@ import "math" // Sin returns the sine of x. func Sin(x complex128) complex128 { + switch re, im := real(x), imag(x); { + case im == 0 && (math.IsInf(re, 0) || math.IsNaN(re)): + return complex(math.NaN(), im) + case math.IsInf(im, 0): + switch { + case re == 0: + return x + case math.IsInf(re, 0) || math.IsNaN(re): + return complex(math.NaN(), im) + } + case re == 0 && math.IsNaN(im): + return x + } s, c := math.Sincos(real(x)) sh, ch := sinhcosh(imag(x)) return complex(s*ch, c*sh) @@ -71,6 +84,19 @@ func Sin(x complex128) complex128 { // Sinh returns the hyperbolic sine of x. func Sinh(x complex128) complex128 { + switch re, im := real(x), imag(x); { + case re == 0 && (math.IsInf(im, 0) || math.IsNaN(im)): + return complex(re, math.NaN()) + case math.IsInf(re, 0): + switch { + case im == 0: + return complex(re, im) + case math.IsInf(im, 0) || math.IsNaN(im): + return complex(re, math.NaN()) + } + case im == 0 && math.IsNaN(re): + return complex(math.NaN(), im) + } s, c := math.Sincos(imag(x)) sh, ch := sinhcosh(real(x)) return complex(c*sh, s*ch) @@ -96,6 +122,19 @@ func Sinh(x complex128) complex128 { // Cos returns the cosine of x. func Cos(x complex128) complex128 { + switch re, im := real(x), imag(x); { + case im == 0 && (math.IsInf(re, 0) || math.IsNaN(re)): + return complex(math.NaN(), -im*math.Copysign(0, re)) + case math.IsInf(im, 0): + switch { + case re == 0: + return complex(math.Inf(1), -re*math.Copysign(0, im)) + case math.IsInf(re, 0) || math.IsNaN(re): + return complex(math.Inf(1), math.NaN()) + } + case re == 0 && math.IsNaN(im): + return complex(math.NaN(), 0) + } s, c := math.Sincos(real(x)) sh, ch := sinhcosh(imag(x)) return complex(c*ch, -s*sh) @@ -115,6 +154,19 @@ func Cos(x complex128) complex128 { // Cosh returns the hyperbolic cosine of x. func Cosh(x complex128) complex128 { + switch re, im := real(x), imag(x); { + case re == 0 && (math.IsInf(im, 0) || math.IsNaN(im)): + return complex(math.NaN(), re*math.Copysign(0, im)) + case math.IsInf(re, 0): + switch { + case im == 0: + return complex(math.Inf(1), im*math.Copysign(0, re)) + case math.IsInf(im, 0) || math.IsNaN(im): + return complex(math.Inf(1), math.NaN()) + } + case im == 0 && math.IsNaN(re): + return complex(math.NaN(), im) + } s, c := math.Sincos(imag(x)) sh, ch := sinhcosh(real(x)) return complex(c*ch, s*sh) |