File 0039-s390x-Fix-stoc-direction.patch of Package qemu

Overview Repositories Revisions Requests Users Attributes Meta

File 0039-s390x-Fix-stoc-direction.patch of Package qemu (Revision b5ade076287b37753a59df835e377cdb)

Currently displaying revision b5ade076287b37753a59df835e377cdb , Show latest

From a8187b81c7ac84123ac4e4fb78d9219473fae1fa Mon Sep 17 00:00:00 2001
From: Alexander Graf <agraf@suse.de>
Date: Wed, 15 Apr 2015 02:28:05 +0200
Subject: [PATCH] s390x: Fix stoc direction

The store conditional instruction wants to store when the condition
is fulfilled, so we should branch out when it's not true.

The code today branches out when the condition is true, clearly
reversing the logic. Fix it up by negating the condition.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 target-s390x/translate.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/target-s390x/translate.c b/target-s390x/translate.c
index 4f82edd..8ae4912 100644
--- a/target-s390x/translate.c
+++ b/target-s390x/translate.c
@@ -3082,6 +3082,10 @@ static ExitStatus op_soc(DisasContext *s, DisasOps *o)
 
     disas_jcc(s, &c, get_field(s->fields, m3));
 
+    /* We want to store when the condition is fulfilled, so branch
+       out when it's not */
+    c.cond = tcg_invert_cond(c.cond);
+
     lab = gen_new_label();
     if (c.is_64) {
         tcg_gen_brcond_i64(c.cond, c.u.s64.a, c.u.s64.b, lab);

Places

File 0039-s390x-Fix-stoc-direction.patch of Package qemu (Revision b5ade076287b37753a59df835e377cdb)

Places