From: Jakub Horak <thement@ibawizard.net>
Date: Mon, 6 Jun 2016 08:47:28 +0000 (+0200)
Subject: target-ppc: Bug in BookE wait instruction
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=35b5066ea7c2c3051fbc5a24b3d463b9800063e2;p=qemu.git

target-ppc: Bug in BookE wait instruction

Fixed bug in code generation for the PowerPC "wait" instruction. It
doesn't make sense to store a non-initialized register.

Signed-off-by: Jakub Horak <thement@ibawizard.net>
[dwg: revised commit message]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
---

diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index b6894751e8..1f401b7e19 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -3499,7 +3499,7 @@ static void gen_sync(DisasContext *ctx)
 /* wait */
 static void gen_wait(DisasContext *ctx)
 {
-    TCGv_i32 t0 = tcg_temp_new_i32();
+    TCGv_i32 t0 = tcg_const_i32(1);
     tcg_gen_st_i32(t0, cpu_env,
                    -offsetof(PowerPCCPU, env) + offsetof(CPUState, halted));
     tcg_temp_free_i32(t0);