ret: O_RET(expr) # 1 # move(bnode->reg, "rax"); ret();
expr: O_ID # 1 # if(bnode->param_index > -1) move(param_reg(bnode->param_index), bnode->reg);
+expr: O_SUB(expr,expr) # 1 # printf("\tsubq %%%s, %%%s\n", bnode->kids[0]->reg, bnode->kids[1]->reg);
%%
| Term Minusterm
@{
- @i @Expr.node@ = TREENULL; fprintf(stderr, "w00t3\n");
+ @i @Expr.node@ = new_node(O_SUB, @Minusterm.node@, @Term.node@);
+
+ @reg {@Term.node@->reg = @Expr.node@->reg;
+ @Minusterm.node@->reg = next_reg(@Term.node@->reg, @Expr.node@->skip);
+ }
@}
| Term Multerm
Minusterm:
'-' Term Minusterm
@{
- @i @Minusterm.node@ = TREENULL;
- @reg fprintf(stderr, "minus1\n");
+ @i @Minusterm.node@ = new_node(O_SUB, @Minusterm.1.node@, @Term.node@);
+
+ @reg { @Minusterm.1.node@->reg = @Minusterm.node@->reg;
+ @Term.node@->reg = next_reg(@Minusterm.1.node@->reg, @Minusterm.node@->skip);
+ }
@}
| '-' Term
@{
- @i @Minusterm.node@ = TREENULL;
- @reg fprintf(stderr, "minus2\n");
+ @reg @Term.node@->reg = @Minusterm.node@->reg;
@}
;
Term:
'(' Expr ')'
@{
- @i @Term.node@ = TREENULL;
+ @i @Term.node@ = @Expr.node@;
@reg fprintf(stderr, "wtf1\n");
@}