From 9b6caa07337c258e239c81f6aa859c8bcf3e243c Mon Sep 17 00:00:00 2001 From: Bernhard Urban Date: Tue, 18 May 2010 17:24:21 +0200 Subject: [PATCH] codea: weitere optimierung fuer sub/add --- codea/code.bfe | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/codea/code.bfe b/codea/code.bfe index e88f2eb..654d669 100644 --- a/codea/code.bfe +++ b/codea/code.bfe @@ -39,6 +39,14 @@ void gen_e_eno(struct treenode *bnode, char *instr) printf("\t%s %%%s, %%%s\n", instr, KID_REG(1), KID_REG(0)); } +void gen_id_eno(struct treenode *bnode) +{ + printf("\t//gen_id_eno\n"); + KIDKIDREG2PARM(1,0); + printf("\taddq %%%s, %%%s\n", KIDKID_REG(1,0), KIDKID_REG(1,1)); + printf("\tsubq %%%s, %%%s\n", KIDKID_REG(1,1), BN_REG); +} + void gen_e_field(struct treenode *bnode, char *instr) { printf("\t//gen_e_field(%s)\n", instr); @@ -193,6 +201,8 @@ expr: O_SUB(expr,imm) # 1 # gen_e_imm(bnode, "subq"); expr: O_SUB(expr,O_SUB(O_ID,expr)) # 2 # gen_subspecial(bnode, 0); expr: O_SUB(expr,O_SUB(imm,expr)) # 2 # gen_subspecial(bnode, 1); +expr: O_SUB(expr, O_ADD(O_ID,expr)) # 1 # gen_id_eno(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); expr: O_SUB(expr,O_MUL(O_MFOUR,expr)) # 1 # gen_lea(bnode,0); -- 2.25.1