Make sure INVALID instruction halts the execution. #230
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…makes sure that the machine halts.
pirapira
changed the title
chriseth
approved these changes
Feb 14, 2017
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Before this pull request, the INVALID instruction did not halt the execution. The exceptional halting condition (126) detects invalid instrucitons by looking at the value of
\delta. Before this pull request, the value of\deltaforINVALIDwas zero; this did not trigger exceptional halting. After this pull-request, the value of\deltais\varnothing, and this triggers exceptional halting.