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diff lwasm/lwasm.h @ 241:d0e9dbe9afbe
Add new heuristic for resolving instruction sizes.
Add new heuristic for resolving instruction sizes. This applies to the the
decision between extended and base page addressing by calculating the range
of possible addresses (if reasonably knowable) and deciding on whether to
force extended addressing based on that. (If the whole range is outside the
direct page, extended addressing is required.)
| author | William Astle <lost@l-w.ca> |
|---|---|
| date | Sun, 23 Sep 2012 13:06:43 -0600 |
| parents | 7c2c2239ec9c |
| children | d4ac484d0ec6 |
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--- a/lwasm/lwasm.h Tue Aug 14 23:03:59 2012 -0600 +++ b/lwasm/lwasm.h Sun Sep 23 13:06:43 2012 -0600 @@ -158,7 +158,8 @@ lw_expr_t daddr; // data address of the line (os9 only) int len; // the "size" this line occupies (address space wise) (-1 if unknown) int dlen; // the data "size" this line occupies (-1 if unknown) - int maxlen; // maximum length; will be zero if not relevant + int minlen; // minimum length + int maxlen; // maximum length int insn; // number of insn in insn table int symset; // set if the line symbol was consumed by the instruction char *sym; // symbol, if any, on the line @@ -347,6 +348,8 @@ extern lw_expr_t lwasm_parse_cond(asmstate_t *as, char **p); +extern int lwasm_calculate_range(asmstate_t *as, lw_expr_t expr, int *min, int *max); + #endif extern void debug_message(asmstate_t *as, int level, const char *fmt, ...);