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Make byte overflow detection for 8 bit immediate not fail with COM operator This is a horrible hack. Add a quick and dirty context to expression parsing so that it knows whether an 8 bit or 16 bit complement is required. The 8 bit complement will just discard anything above bit 7. When returning an operator back with lwasm_whichop(), the result will still be "COM" which should allow other things to keep working as they already do. This does prevent byte overflows when the complement operator is used, however, and since those were introduced, there were problems building Nitros9 among other things. This fix allows Nitros9 to build again.
author William Astle <lost@l-w.ca>
date Tue, 02 Jun 2015 20:58:14 -0600
parents 3f8abaac214c
children c6d2a1f54e0c
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365:3f8abaac214c 366:433dbc18fb41
321 lw_expr_t savedaddr; // old address counter before struct started 321 lw_expr_t savedaddr; // old address counter before struct started
322 int exportcheck; // set if we need to collapse out the section base to 0 322 int exportcheck; // set if we need to collapse out the section base to 0
323 int passno; // set to the current pass number 323 int passno; // set to the current pass number
324 int preprocess; // set if we are prepocessing 324 int preprocess; // set if we are prepocessing
325 int fileerr; // flags error opening file 325 int fileerr; // flags error opening file
326 int exprwidth; // the bit width of the expression being evaluated
326 }; 327 };
327 328
328 #ifndef ___symbol_c_seen___ 329 #ifndef ___symbol_c_seen___
329 330
330 extern struct symtabe *register_symbol(asmstate_t *as, line_t *cl, char *sym, lw_expr_t value, int flags); 331 extern struct symtabe *register_symbol(asmstate_t *as, line_t *cl, char *sym, lw_expr_t value, int flags);