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gotestify & gostylify math.

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R=r
DELTA=682  (275 added, 301 deleted, 106 changed)
OCL=19638
CL=19642
This commit is contained in:
Russ Cox 2008-11-19 16:14:31 -08:00
parent be7e0f8160
commit 88daac7862
18 changed files with 385 additions and 411 deletions
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35
src/lib/math/sin.go
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@ -18,25 +18,22 @@ const
piu2 = .6366197723675813430755350e0; // 2/pi
)
func
sinus(arg float64, quad int) float64
{
var e, f, ysq, x, y, temp1, temp2 float64;
var k int32;
x = arg;
func Sinus(arg float64, quad int) float64 {
x := arg;
if(x < 0) {
x = -x;
quad = quad+2;
}
x = x * piu2; /* underflow? */
var y float64;
if x > 32764 {
e,y = sys.modf(x);
var e float64;
e, y = sys.modf(x);
e = e + float64(quad);
temp1,f = sys.modf(0.25*e);
temp1, f := sys.modf(0.25*e);
quad = int(e - 4*f);
} else {
k = int32(x);
k := int32(x);
y = x - float64(k);
quad = (quad + int(k)) & 3;
}
@ -48,23 +45,19 @@ sinus(arg float64, quad int) float64
y = -y;
}
ysq = y*y;
temp1 = ((((p4*ysq+p3)*ysq+p2)*ysq+p1)*ysq+p0)*y;
temp2 = ((((ysq+q3)*ysq+q2)*ysq+q1)*ysq+q0);
ysq := y*y;
temp1 := ((((p4*ysq+p3)*ysq+p2)*ysq+p1)*ysq+p0)*y;
temp2 := ((((ysq+q3)*ysq+q2)*ysq+q1)*ysq+q0);
return temp1/temp2;
}
export func
cos(arg float64) float64
{
export func Cos(arg float64) float64 {
if arg < 0 {
arg = -arg;
}
return sinus(arg, 1);
return Sinus(arg, 1);
}
export func
sin(arg float64) float64
{
return sinus(arg, 0);
export func Sin(arg float64) float64 {
return Sinus(arg, 0);
}