Stowage/go
2
0
Fork 0
mirror of https://github.com/golang/go.git synced 2025-12-08 06:10:04 +00:00
Code Issues Projects Releases Packages Wiki Activity

converted double to float64

Browse source 
SVN=126446
This commit is contained in:
Ken Thompson 2008-07-08 20:48:41 -07:00
parent 8e4ee0045f
commit 77e20e8cec
18 changed files with 141 additions and 145 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/lib/math/exp.go
View file

@ -8,11 +8,11 @@ import math "floor"
export exp
/*
exp returns the exponential func of its
floating-point argument.
The coefficients are #1069 from Hart and Cheney. (22.35D)
*/
* exp returns the exponential func of its
* floating-point argument.
*
* The coefficients are #1069 from Hart and Cheney. (22.35D)
*/
const
(
@ -28,16 +28,16 @@ const
)
func
exp(arg double) double
exp(arg float64) float64
{
var x, fract, temp1, temp2, xsq double;
var x, fract, temp1, temp2, xsq float64;
var ent int;
if arg == 0. {
return 1;
}
if arg < -maxf {
return 0.;
return 0;
}
if arg > maxf {
return sys.Inf(1)
@ -45,7 +45,7 @@ exp(arg double) double
x = arg*log2e;
ent = int(floor(x));
fract = (x-double(ent)) - 0.5;
fract = (x-float64(ent)) - 0.5;
xsq = fract*fract;
temp1 = ((p2*xsq+p1)*xsq+p0)*fract;
temp2 = ((xsq+q2)*xsq+q1)*xsq + q0;