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Cleaned up divExtended()

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This commit is contained in:
Jeff Parsons 2017-02-15 22:27:03 -08:00 • committed by Jeff Parsons
commit 4d94b5812b
1 changed files with 5 additions and 13 deletions
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18
modules/shared/lib/int36.js
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@ -398,24 +398,16 @@ class Int36 {
*/
divExtended(divisor)
{
/*
* dividend divisor quotient remainder
* -------- ------- -------- ---------
* + + -> + +
* + - -> - +
* - + -> - -
* - - -> + -
*/
var bNegLo = 0, bNegHi = 0;
var fNegQ = false, fNegR = false;
if (divisor > Int36.MAXPOS) {
divisor = Int36.BIT36 - divisor;
bNegLo = 1 - bNegLo;
fNegQ = !fNegQ;
}
if (this.isNegative()) {
this.negate();
bNegHi = 1; bNegLo = 1 - bNegLo;
fNegR = true; fNegQ = !fNegQ;
}
var value = this.value;
@ -454,10 +446,10 @@ class Int36 {
this.extended = null;
this.remainder = bitsRem[0];
if (bNegLo && this.value) {
if (fNegQ && this.value) {
this.value = Int36.BIT36 - this.value;
}
if (bNegHi && this.remainder) {
if (fNegR && this.remainder) {
this.remainder = Int36.BIT36 - this.remainder;
}
}