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make safe for new package local defaults

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R=r
DELTA=462  (9 added, 33 deleted, 420 changed)
OCL=22879
CL=22885
This commit is contained in:
Russ Cox 2009-01-15 16:16:42 -08:00
parent 1d74892178
commit b54133d200
17 changed files with 406 additions and 403 deletions
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36
src/lib/math/sin.go
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@ -9,32 +9,32 @@ package math
*/
const
(
p0 = .1357884097877375669092680e8;
p1 = -.4942908100902844161158627e7;
p2 = .4401030535375266501944918e6;
p3 = -.1384727249982452873054457e5;
p4 = .1459688406665768722226959e3;
q0 = .8644558652922534429915149e7;
q1 = .4081792252343299749395779e6;
q2 = .9463096101538208180571257e4;
q3 = .1326534908786136358911494e3;
sp0 = .1357884097877375669092680e8;
sp1 = -.4942908100902844161158627e7;
sp2 = .4401030535375266501944918e6;
sp3 = -.1384727249982452873054457e5;
sp4 = .1459688406665768722226959e3;
sq0 = .8644558652922534429915149e7;
sq1 = .4081792252343299749395779e6;
sq2 = .9463096101538208180571257e4;
sq3 = .1326534908786136358911494e3;
piu2 = .6366197723675813430755350e0; // 2/pi
spiu2 = .6366197723675813430755350e0; // 2/pi
)
func Sinus(arg float64, quad int) float64 {
func sinus(arg float64, quad int) float64 {
x := arg;
if(x < 0) {
x = -x;
quad = quad+2;
}
x = x * piu2; /* underflow? */
x = x * spiu2; /* underflow? */
var y float64;
if x > 32764 {
var e float64;
e, y = sys.modf(x);
e = e + float64(quad);
temp1, f := sys.modf(0.25*e);
temsp1, f := sys.modf(0.25*e);
quad = int(e - 4*f);
} else {
k := int32(x);
@ -50,18 +50,18 @@ func Sinus(arg float64, quad int) float64 {
}
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;
temsp1 := ((((sp4*ysq+sp3)*ysq+sp2)*ysq+sp1)*ysq+sp0)*y;
temsp2 := ((((ysq+sq3)*ysq+sq2)*ysq+sq1)*ysq+sq0);
return temsp1/temsp2;
}
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);
return sinus(arg, 0);
}