From 4b5ef0b50da39a9672524a39484512fe3ab56eb5 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Sat, 24 Jul 2010 23:25:49 +0200 Subject: microblaze: Speed up base + index addressing mode Speed up reg + reg addressing mode when any of the regs is r0. Signed-off-by: Edgar E. Iglesias --- target-microblaze/translate.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/target-microblaze/translate.c b/target-microblaze/translate.c index 3a766d8..9c0492e 100644 --- a/target-microblaze/translate.c +++ b/target-microblaze/translate.c @@ -788,6 +788,13 @@ static inline TCGv *compute_ldst_addr(DisasContext *dc, TCGv *t) /* Treat the fast cases first. */ if (!dc->type_b) { + /* If any of the regs is r0, return a ptr to the other. */ + if (dc->ra == 0) { + return &cpu_R[dc->rb]; + } else if (dc->rb == 0) { + return &cpu_R[dc->ra]; + } + *t = tcg_temp_new(); tcg_gen_add_tl(*t, cpu_R[dc->ra], cpu_R[dc->rb]); return t; -- cgit v1.1