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PDP-10 "DAKAK" multiplication diagnostic passes

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Jeff 2017-03-31 08:14:56 -07:00 • committed by Jeff Parsons
commit 71e2ecb5cb
3 changed files with 3 additions and 6 deletions
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5
modules/pdp10/lib/cpuops.js
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@ -6390,13 +6390,10 @@ PDP10.doMUL = function(dst, src, fTruncate)
var m1d2 = (n1d2 * n2d1) + Math.trunc(m1d1 / PDP10.HALF_SHIFT);
ext = Math.trunc(m1d2 / PDP10.HALF_SHIFT);
m1d2 = (m1d2 & PDP10.HALF_MASK) + (n1d1 * n2d2);
res = (m1d2 * PDP10.HALF_SHIFT) + (m1d1 & PDP10.HALF_MASK);
res = ((m1d2 * PDP10.HALF_SHIFT) + (m1d1 & PDP10.HALF_MASK)) % PDP10.WORD_LIMIT;
ext += Math.trunc(m1d2 / PDP10.HALF_SHIFT) + (n1d2 * n2d2);
}
this.assert(res == res % PDP10.WORD_LIMIT);
this.assert(ext == ext % PDP10.WORD_LIMIT);
if (fNeg) {
if (res) {
ext = PDP10.WORD_MASK - ext;