From a06d48d91f1613878d0d3c57980451aac15e3f75 Mon Sep 17 00:00:00 2001
From: Richard Henderson <rth@twiddle.net>
Date: Fri, 11 Dec 2009 13:21:02 -0800
Subject: [PATCH] target-alpha: Fix FMOV.

Properly handle move from the zero register.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target-alpha/translate.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index 1c809b7611..8a9aeb744f 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -1834,12 +1834,16 @@ static inline int translate_one(DisasContext *ctx, uint32_t insn)
             break;
         case 0x020:
             if (likely(rc != 31)) {
-                if (ra == rb)
+                if (ra == rb) {
                     /* FMOV */
-                    tcg_gen_mov_i64(cpu_fir[rc], cpu_fir[ra]);
-                else
+                    if (ra == 31)
+                        tcg_gen_movi_i64(cpu_fir[rc], 0);
+                    else
+                        tcg_gen_mov_i64(cpu_fir[rc], cpu_fir[ra]);
+                } else {
                     /* CPYS */
                     gen_fcpys(ra, rb, rc);
+                }
             }
             break;
         case 0x021: