diff options
| author | Kenneth D. Merry <ken@FreeBSD.org> | 2001-04-04 22:50:57 +0000 |
|---|---|---|
| committer | Kenneth D. Merry <ken@FreeBSD.org> | 2001-04-04 22:50:57 +0000 |
| commit | 4464fee50386ebff4d8a1e9f4e28917f1791918a (patch) | |
| tree | 2dd20dcadebaa7fc4a498f15ad0498ae873b645c /sys/dev/aic7xxx/aicasm/aicasm_gram.y | |
| parent | a1bc34c6b8c9e4f2ba683f26dec5793bf3cd493d (diff) | |
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
Notes
Notes:
svn path=/head/; revision=75201
Diffstat (limited to 'sys/dev/aic7xxx/aicasm/aicasm_gram.y')
| -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 d0bc6714acdc..91425f38c30a 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 { |