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[Qemu-devel] Bug in ppc/BookE wait instruction

From: Jakub Horak
Subject: [Qemu-devel] Bug in ppc/BookE wait instruction
Date: Fri, 3 Jun 2016 17:45:49 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

I think there's a bug in "wait" instruction code generator for PowerPC
architecture. It doesn't make sense to store a non-initialized register.

Best regards,
Jakub Horak

diff --git a/target-ppc/translate.c b/target-ppc/translate.c
index f5ceae5..6af567b 100644
--- a/target-ppc/translate.c
+++ b/target-ppc/translate.c
@@ -3439,7 +3439,7 @@ 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));

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