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PPC: Fix string.sub() range check.

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This commit is contained in:
Mike Pall 2012-10-07 17:12:28 +02:00
parent 2f5ed5d0df
commit c681e009c0
1 changed files with 4 additions and 4 deletions
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8
src/vm_ppc.dasc
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@ -2100,10 +2100,10 @@ static void build_subroutines(BuildCtx *ctx)
| b ->fff_newstr
|
|5: // Negative end or overflow.
| sub CARG2, TMP0, TMP2
| srawi CARG2, CARG2, 31
| andc TMP3, TMP3, CARG2 // end = end > len ? len : end+len+1
| add TMP2, TMP0, TMP3
| cmpw TMP0, TMP2 // len >= end? (signed compare)
| add TMP2, TMP0, TMP3 // Negative end: end = end+len+1.
| bge <2
| mr TMP2, TMP0 // Overflow: end = len.
| b <2
|
|7: // Negative start or underflow.