diff options
Diffstat (limited to 'src/pkg/math/sin.go')
| -rw-r--r-- | src/pkg/math/sin.go | 22 |
1 files changed, 11 insertions, 11 deletions
diff --git a/src/pkg/math/sin.go b/src/pkg/math/sin.go index 2c6f0079e..adff067c2 100644 --- a/src/pkg/math/sin.go +++ b/src/pkg/math/sin.go @@ -20,33 +20,33 @@ func sinus(x float64, quad int) float64 { ) if x < 0 { x = -x; - quad = quad+2; + quad = quad + 2; } - x = x*(2/Pi); /* underflow? */ + x = x * (2 / Pi); /* underflow? */ var y float64; if x > 32764 { var e float64; e, y = Modf(x); - e = e+float64(quad); - _, f := Modf(0.25*e); + e = e + float64(quad); + _, f := Modf(0.25 * e); quad = int(e - 4*f); } else { k := int32(x); - y = x-float64(k); - quad = (quad+int(k))&3; + y = x - float64(k); + quad = (quad + int(k)) & 3; } if quad&1 != 0 { - y = 1-y + y = 1 - y } if quad > 1 { y = -y } - yy := y*y; - temp1 := ((((P4*yy + P3)*yy + P2)*yy + P1)*yy + P0)*y; - temp2 := ((((yy+Q3)*yy + Q2)*yy + Q1)*yy + Q0); - return temp1/temp2; + yy := y * y; + temp1 := ((((P4*yy+P3)*yy+P2)*yy+P1)*yy + P0) * y; + temp2 := ((((yy+Q3)*yy+Q2)*yy + Q1) * yy + Q0); + return temp1 / temp2; } // Cos returns the cosine of x. |