Mercurial > hg > index.cgi

comparison lwasm/pass1.c @ 43:18b49cf10ae9

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added an instruction reduction immediately after instruction parsing to minimize memory footprint and expression complexity
author lost@l-w.ca
date Mon, 04 Apr 2011 17:55:08 -0600
parents d96037ea0b80
children bd8b3fbd1e28
comparison
equal deleted inserted replaced
42:31adb7c09b4e 43:18b49cf10ae9
275 // no parse func means operand doesn't matter 275 // no parse func means operand doesn't matter
276 if (instab[opnum].parse) 276 if (instab[opnum].parse)
277 { 277 {
278 if (as -> instruct == 0 || instab[opnum].flags & lwasm_insn_struct) 278 if (as -> instruct == 0 || instab[opnum].flags & lwasm_insn_struct)
279 { 279 {
280 struct line_expr_s *le;
281
280 cl -> len = -1; 282 cl -> len = -1;
281 // call parse function 283 // call parse function
282 (instab[opnum].parse)(as, cl, &p1); 284 (instab[opnum].parse)(as, cl, &p1);
283 285
284 if (*p1 && !isspace(*p1)) 286 if (*p1 && !isspace(*p1))
285 { 287 {
286 // flag bad operand error 288 // flag bad operand error
287 lwasm_register_error(as, cl, "Bad operand (%s)", p1); 289 lwasm_register_error(as, cl, "Bad operand (%s)", p1);
288 } 290 }
291
292 /* do a reduction on the line expressions to avoid carrying excessive expression baggage if not needed */
293 as -> cl = cl;
294
295 // simplify address
296 lwasm_reduce_expr(as, cl -> addr);
297
298 // simplify each expression
299 for (le = cl -> exprs; le; le = le -> next)
300 lwasm_reduce_expr(as, le -> expr);
301
302 /* try resolving the instruction as well */
303 if (cl -> insn >= 0 && instab[cl -> insn].resolve)
304 {
305 (instab[cl -> insn].resolve)(as, cl, 0);
306 }
307
289 } 308 }
290 else if (as -> instruct == 1) 309 else if (as -> instruct == 1)
291 { 310 {
292 lwasm_register_error(as, cl, "Bad operand (%s)", p1); 311 lwasm_register_error(as, cl, "Bad operand (%s)", p1);
293 } 312 }