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comparison lwasm/insn_gen.c @ 355:3afb809c7add

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Make 8 bit immediate operands flag a byte overflow if not in 8 bit range. 8 bit immediate operands should flag a byte overflow if they are out of range. The acceptable range is -128 <= x <= 255 to cover both signed and unsigned values.
author William Astle <lost@l-w.ca>
date Tue, 19 May 2015 12:26:35 -0600
parents 210d261a614d
children 433dbc18fb41
comparison
equal deleted inserted replaced
354:433851a26794 355:3afb809c7add
367 { 367 {
368 if (l -> lint2 == 3) 368 if (l -> lint2 == 3)
369 { 369 {
370 lw_expr_t e; 370 lw_expr_t e;
371 e = lwasm_fetch_expr(l, 0); 371 e = lwasm_fetch_expr(l, 0);
372 if (lw_expr_istype(e, lw_expr_type_int))
373 {
374 int i;
375 i = lw_expr_intval(e);
376 if (i < -128 || i > 255)
377 {
378 lwasm_register_error(as, l, "Byte overflow");
379 }
380 }
381
372 lwasm_emitop(l, instab[l -> insn].ops[3]); 382 lwasm_emitop(l, instab[l -> insn].ops[3]);
373 lwasm_emitexpr(l, e, 1); 383 lwasm_emitexpr(l, e, 1);
374 return; 384 return;
375 } 385 }
376 386
526 { 536 {
527 lw_expr_t e; 537 lw_expr_t e;
528 538
529 lwasm_emitop(l, instab[l -> insn].ops[0]); 539 lwasm_emitop(l, instab[l -> insn].ops[0]);
530 e = lwasm_fetch_expr(l, 0); 540 e = lwasm_fetch_expr(l, 0);
541 if (lw_expr_istype(e, lw_expr_type_int))
542 {
543 int i;
544 i = lw_expr_intval(e);
545 if (i < -128 || i > 255)
546 {
547 lwasm_register_error(as, l, "Byte overflow");
548 }
549 }
531 lwasm_emitexpr(l, e, 1); 550 lwasm_emitexpr(l, e, 1);
532 } 551 }