codea: multiplikation

[uebersetzerbau-ss10.git] / codea / code.bfe

diff --git a/codea/code.bfe b/codea/code.bfe
index 0d4661ba19a598442911f0cae5895c11f913b448..03e2111ab7d3dc01ec42b3c582e653b71122b722 100644 (file)
--- a/codea/code.bfe
+++ b/codea/code.bfe
@@ -1,6 +1,12 @@
 %{
 #define BFEHAX
 
+#define KID_REG(A) bnode->kids[A]->reg
+#define KID_VAL(A) bnode->kids[A]->val
+#define BN_REG bnode->reg
+#define BN_VAL bnode->val
+#define KIDREG2PARM(A) if(bnode->kids[A]->param_index > -1) { bnode->kids[A]->reg = param_reg(bnode->kids[A]->param_index); }
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <assert.h>
@@ -10,15 +16,37 @@
 %}
 
 %start begin
-%term O_RETURN=1
+%term O_RET=1 O_NOT=2 O_SUB=3 O_MUL=4 O_OR=5 O_LESS=6 O_EQ=7 O_ID=8 O_ADD=9 O_NUM=10
 
 %%
 
-begin: ret
-ret: O_RETURN # 1 # ret();
+begin: ret # 0 # printf("\n");
+ret: O_RET(expr) # 2 # move(BN_REG, "rax"); func_footer();
+
+expr: O_ID # 1 # if(bnode->param_index > -1) move(param_reg(bnode->param_index), BN_REG);
+expr: imm # 1 # moveimm(BN_VAL, BN_REG);
+
+expr: O_SUB(expr,exprno) # 1 # KIDREG2PARM(1); printf("\tsubq %%%s, %%%s\n", KID_REG(1), KID_REG(0));
+expr: O_SUB(expr,imm) # 2 # printf("\tsubq $%li, %%%s\n", KID_VAL(1), KID_REG(0)); move(KID_REG(0), BN_REG);
+expr: O_SUB(imm,exprno) # 3 # moveimm(KID_VAL(0), BN_REG); KIDREG2PARM(1); printf("\tsubq %%%s, %%%s\n", KID_REG(1), BN_REG);
+
+expr: O_ADD(expr,exprno) # 1 # KIDREG2PARM(1); printf("\taddq %%%s, %%%s\n", KID_REG(1), KID_REG(0));
+expr: O_ADD(imm,expr) # 1 # printf("\taddq $%li, %%%s\n", KID_VAL(1), KID_REG(0)); move(KID_REG(0), BN_REG);
+
+expr: O_MUL(expr,exprno) # 1 # KIDREG2PARM(1); printf("\timulq %%%s, %%%s\n", KID_REG(1), KID_REG(0));
+expr: O_MUL(expr,imm) # 2 # printf("\timulq $%li, %%%s\n", KID_VAL(1), KID_REG(0)); move(KID_REG(0), BN_REG);
+expr: O_MUL(imm,exprno) # 3 # moveimm(KID_VAL(0), BN_REG); KIDREG2PARM(1); printf("\timulq %%%s, %%%s\n", KID_REG(1), BN_REG);
+
+exprno: O_ID # 0 # /* brauchen wir nicht 'zwischenlagern', weil nur gelesen wird */
+exprno: expr
+
+
+imm: O_ADD(imm,imm) # 0 # BN_VAL = KID_VAL(0)+KID_VAL(1);
+imm: O_SUB(imm,imm) # 0 # BN_VAL = KID_VAL(0)-KID_VAL(1);
+imm: O_MUL(imm,imm) # 0 # BN_VAL = KID_VAL(0)*KID_VAL(1);
+imm: O_NUM # 0 #
 
 %%
 
 /* vim: filetype=c
  */
-