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(parent: 4f8443e) | patch
Rules that perform index->fixnum conversions must use arithmetic left
authorChris Hanson <org/chris-hanson/cph>
Wed, 15 Nov 1989 02:40:21 +0000 (02:40 +0000)
committerChris Hanson <org/chris-hanson/cph>
Wed, 15 Nov 1989 02:40:21 +0000 (02:40 +0000)
commit7498e41630b0ea6b6802ffc3922e0a082a8d9a2d
tree7accc3c69bac05c1c22fea4ab5862fa65cc3807etree | snapshot
parent4f8443e4b9a127006432ff8cc2a0d1e618ea19b8commit | diff
Rules that perform index->fixnum conversions must use arithmetic left
shift so that proper testing for overflow can occur.  The reason:
these rules also get invoked by generic arithmetic because the code
compressor sees them and combines instruction pairs to use them.
v7/src/compiler/machines/bobcat/rules1.scm diff | blob | history
MIT/GNU Scheme, Pucked