From ea73a166fb0973b8fd44c320769b9844de11e78e Mon Sep 17 00:00:00 2001
From: Bernhard Urban <lewurm@gmail.com>
Date: Tue, 18 May 2010 01:11:47 +0200
Subject: [PATCH] codea: optimierungen fuer fieldzugriffe bei mul, sub und add

---
 codea/code.bfe | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/codea/code.bfe b/codea/code.bfe
index 377082d..14cde11 100644
--- a/codea/code.bfe
+++ b/codea/code.bfe
@@ -40,6 +40,19 @@ void gen_e_field(struct treenode *bnode, char *instr)
 	printf("\t%s %d(%%%s), %%%s\n", instr, bnode->kids[1]->soffset * 8, KIDKID_REG(1,0), KID_REG(0));
 }
 
+void gen_field_imm(struct treenode *bnode)
+{
+	printf("\t//gen_field_imm\n");
+	KIDKIDREG2PARM(0,0);
+	KIDREG2ID(1);
+
+	if(KID_VAL(1) == 1 && strcmp(KID_REG(0), BN_REG) == 0) {
+		printf("\t//multiplikation mit 1 wegoptimiert\n");
+	} else {
+		printf("\timulq $%d, %d(%%%s), %%%s\n", KID_VAL(1), bnode->kids[0]->soffset * 8, KIDKID_REG(0, 0), BN_REG);
+	}
+}
+
 void gen_e_imm(struct treenode *bnode, char *instr)
 {
 	printf("\t//gen_e_imm(%s)\n", instr);
@@ -63,6 +76,16 @@ void gen_e_imm(struct treenode *bnode, char *instr)
 	}
 }
 
+void gen_imm_field(struct treenode *bnode)
+{
+	printf("\t//gen_imm_field\n");
+	KIDREG2ID(0);
+	KIDKIDREG2PARM(1, 0);
+
+	moveimm(KID_VAL(0), BN_REG);
+	printf("\tsubq %d(%%%s), %%%s\n", bnode->kids[1]->soffset * 8, KIDKID_REG(1, 0), BN_REG);
+}
+
 void gen_imm_eno(struct treenode *bnode, char *instr)
 {
 	printf("\t//gen_imm_eno(%s)\n", instr);
@@ -143,9 +166,10 @@ expr: O_ID # 0 #
 expr: imm # 1 # moveimm(BN_VAL, BN_REG);
 
 expr: O_SUB(expr,expr) # 1 # gen_e_eno(bnode, "subq");
+expr: O_SUB(expr,O_FIELD(expr)) # 2 # gen_e_field(bnode, "subq");
 expr: O_SUB(expr,imm)    # 2 # gen_e_imm(bnode, "subq");
 expr: O_SUB(imm,expr)  # 2 # gen_imm_eno(bnode, "subq");
-expr: O_SUB(expr,O_FIELD(expr)) # 2 # gen_e_field(bnode, "subq");
+expr: O_SUB(imm,O_FIELD(expr)) # 2 # gen_imm_field(bnode);
 
 expr: O_SUB(expr,O_MUL(O_MONE,expr)) # 1 # gen_lea(bnode,0);
 expr: O_SUB(expr,O_MUL(O_MTWO,expr)) # 1 # gen_lea(bnode,0);
@@ -158,11 +182,14 @@ expr: O_SUB(expr,O_MUL(expr,O_MFOUR)) # 1 # gen_lea(bnode,1);
 expr: O_SUB(expr,O_MUL(expr,O_MEIGHT)) # 1 # gen_lea(bnode,1);
 
 expr: O_ADD(expr,expr) # 1 # gen_e_eno(bnode, "addq");
+expr: O_ADD(expr,O_FIELD(expr)) # 2 # gen_e_field(bnode, "addq");
 expr: O_ADD(expr,imm)    # 2 # gen_e_imm(bnode, "addq");
 expr: O_ADD(imm,expr)    # 2 # gen_imm_eno(bnode, "addq");
 
 expr: O_MUL(expr,expr) # 1 # gen_e_eno(bnode, "imulq");
+expr: O_MUL(expr,O_FIELD(expr)) # 2 # gen_e_field(bnode, "imulq");
 expr: O_MUL(expr,imm)    # 1 # gen_e_imm(bnode, "imulq");
+expr: O_MUL(O_FIELD(expr),imm)  # 1 # gen_field_imm(bnode);
 expr: O_MUL(imm,expr)  # 1 # gen_imm_eno(bnode, "imulq");
 
 expr: O_OR(expr,expr) # 1 # gen_e_eno(bnode, "orq");
-- 
2.25.1