Mercurial > hg > index.cgi
comparison lwasm/insn_indexed.c @ 283:210d261a614d
Make byte overflow detection for indexing work better
There are *two* places where indexed addressing is calculated - lea style
instructions and general addressing instructions. Actually check for byte
overflows in both places. Also, extend byte overflow checking to all 8 bit
offsets from index registers, not just PCR.
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Mon, 02 Sep 2013 10:49:57 -0600 |
| parents | 3c421f24c9b8 |
| children | b7e4992c12e7 |
comparison
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| 282:3c421f24c9b8 | 283:210d261a614d |
|---|---|
| 579 | 579 |
| 580 void insn_emit_indexed_aux(asmstate_t *as, line_t *l) | 580 void insn_emit_indexed_aux(asmstate_t *as, line_t *l) |
| 581 { | 581 { |
| 582 lw_expr_t e; | 582 lw_expr_t e; |
| 583 | 583 |
| 584 if (l -> lint == 1 && (l -> pb == 0x9c || l -> pb == 0x8c)) | 584 if (l -> lint == 1) |
| 585 { | 585 { |
| 586 int i; | 586 int i; |
| 587 e = lwasm_fetch_expr(l, 0); | 587 e = lwasm_fetch_expr(l, 0); |
| 588 i = lw_expr_intval(e); | 588 i = lw_expr_intval(e); |
| 589 if (i < -128 || i > 127) | 589 if (i < -128 || i > 127) |