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update to new world. still can't use it but it's a lot of editing....

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SVN=125218
This commit is contained in:
Rob Pike 2008-06-27 17:06:23 -07:00
parent 390d5fe5b2
commit 4331293f41
16 changed files with 59 additions and 66 deletions
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15
src/lib/math/exp.go
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@ -2,10 +2,9 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package exp
package math
import sys "sys"
import floor "floor"
import math "floor"
export exp
/*
@ -34,21 +33,21 @@ exp(arg double) double
var x, fract, temp1, temp2, xsq double;
var ent int;
if arg == 0 {
if arg == 0. {
return 1;
}
if arg < -maxf {
return 0;
return 0.;
}
if arg > maxf {
return sys.Inf(1);
panic "return sys.Inf(1)"
}
x = arg*log2e;
ent = int(floor.floor(x));
ent = int(floor(x));
fract = (x-double(ent)) - 0.5;
xsq = fract*fract;
temp1 = ((p2*xsq+p1)*xsq+p0)*fract;
temp2 = ((xsq+q2)*xsq+q1)*xsq + q0;
return sys.ldexp(sqrt2*(temp2+temp1)/(temp2-temp1), ent);
return sys.ldexp(ent, sqrt2*(temp2+temp1)/(temp2-temp1));
}