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Simplify code by using doubleHighPart 

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_X@1062258 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Sebastian Bazley 2011-01-22 20:26:34 +00:00
parent fd9fbe39b6
commit 5ac0307deb
1 changed files with 3 additions and 17 deletions
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20
src/main/java/org/apache/commons/math/util/FastMath.java
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@ -3205,13 +3205,7 @@ public class FastMath {
return Math.PI/2; // so return the appropriate value
}
if (abs(r) < Double.MAX_VALUE/HEX_40000000){ // is it safe to split r ?
temp = r * HEX_40000000;
} else {
temp = 0.0;
}
double ra = r + temp - temp;
double ra = doubleHighPart(r);
double rb = r - ra;
rb += (y - ra*xa - ra*xb - rb*xa - rb*xb) / x; // Correct for rounding in division
@ -3323,11 +3317,7 @@ public class FastMath {
final double facta = 0.01745329052209854;
final double factb = 1.997844754509471E-9;
double temp = 0;
if (abs(x) < Double.MAX_VALUE/HEX_40000000) { // prevent overflow to infinity
temp = x * HEX_40000000;
}
double xa = x + temp - temp;
double xa = doubleHighPart(x);
double xb = x - xa;
double result = xb * factb + xb * facta + xa * factb + xa * facta;
@ -3352,11 +3342,7 @@ public class FastMath {
final double facta = 57.2957763671875;
final double factb = 3.145894820876798E-6;
double temp = 0;
if (abs(x) < Double.MAX_VALUE/HEX_40000000) { // prevent overflow to infinity
temp = x * HEX_40000000;
}
double xa = x + temp - temp;
double xa = doubleHighPart(x);
double xb = x - xa;
return xb * factb + xb * facta + xa * factb + xa * facta;