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Content
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MMIXware Version
mmix-20131017
Bug Reported
Initial: 27/8/2015
Author
Andreas Scherer and
Martin Ruckert
Description
The bug fix for the rI and rU as described in
"rI and rU
are not implemented according to specification" was not implemented
correctly. The parenteses around "&" in
"if ((g[rU].h&0x7fff)==0) g[rU].h-=0x8000;"
were omitted. As a consequence mmix-sim would behave different than mmix-pipe
(see section 146 of mmix-pipe.w).
Proposed patch
Replace
g[rU].h++;@+ if (g[rU].h&0x7fff==0) g[rU].h-=0x8000;@+
by
g[rU].h++;@+ if ((g[rU].h&0x7fff)==0) g[rU].h-=0x8000;@+
Discussion
The patch as given above is in the source repository.
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