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| author | ken <ken@FreeBSD.org> | 2001-04-04 22:50:57 +0000 |
|---|---|---|
| committer | ken <ken@FreeBSD.org> | 2001-04-04 22:50:57 +0000 |
| commit | d5dead39709dcee38811dc4233580bdc17e9cc10 (patch) | |
| tree | fe4eb88e87bc3ddadefe6545acfba7b4ed4a310f | |
| parent | 44f132def73a73ef49478fd52284a38cb165cb63 (diff) | |
| download | FreeBSD-src-d5dead39709dcee38811dc4233580bdc17e9cc10.zip FreeBSD-src-d5dead39709dcee38811dc4233580bdc17e9cc10.tar.gz | |
Don't allow immediate values of 0 for operations that can take either an
immediate value or the accumulator. 0 is the chip's internal
representation for the accumulator, and so 0 is an invalid immediate value
when the accumulator can also be specified as an argument.
Submitted by: gibbs
| -rw-r--r-- | sys/dev/aic7xxx/aicasm/aicasm_gram.y | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/dev/aic7xxx/aicasm/aicasm_gram.y b/sys/dev/aic7xxx/aicasm/aicasm_gram.y index d0bc671..91425f3 100644 --- a/sys/dev/aic7xxx/aicasm/aicasm_gram.y +++ b/sys/dev/aic7xxx/aicasm/aicasm_gram.y @@ -623,6 +623,11 @@ immediate_or_a: expression { $$ = $1; + if ($$.value == 0) { + stop("Immediate value of 0 not valid for opcode", + EX_DATAERR); + /* NOTREACHED */ + } } | T_A { |
