From: Christian Borntraeger <borntraeger@de.ibm.com>
Date: Fri, 8 Jun 2012 06:39:43 +0000 (+0000)
Subject: CDSG needs quad word (16 byte) aligned data structures. Since the stack
X-Git-Tag: svn/VALGRIND_3_8_0~248
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=22e12f07a186ff9773d47d0d663cc8ee361e69c6;p=thirdparty%2Fvalgrind.git

CDSG needs quad word (16 byte) aligned data structures. Since the stack
on s390 has only 8 byte alignment gcc cant guarantee 16 byte alignment
for local variables. As a global variable gcc can do that.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12620
---

diff --git a/none/tests/s390x/cdsg.c b/none/tests/s390x/cdsg.c
index b1392d3ec2..f4f7f9f855 100644
--- a/none/tests/s390x/cdsg.c
+++ b/none/tests/s390x/cdsg.c
@@ -4,21 +4,26 @@
 typedef struct {
    uint64_t high;
    uint64_t low;
-} quad_word;
+} __attribute__((aligned(16))) quad_word;
 
-void 
+
+/* CDSG needs quad-word alignment */
+quad_word op1, op2, op3;
+
+void
 test(quad_word op1_init, quad_word op2_init, quad_word op3_init,
      int expected_cc)
 {
+   quad_word op1_before, op2_before, op3_before;
    int cc = 1 - expected_cc;
 
-   quad_word op1 = op1_init;
-   quad_word op2 = op2_init;
-   quad_word op3 = op3_init;
+   op1 = op1_init;
+   op2 = op2_init;
+   op3 = op3_init;
 
-   quad_word op1_before = op1;
-   quad_word op2_before = op2;
-   quad_word op3_before = op3;
+   op1_before = op1;
+   op2_before = op2;
+   op3_before = op3;
 
    printf("before op1 = (%#lx, %#lx)\n", op1.high, op1.low);
    printf("before op2 = (%#lx, %#lx)\n", op2.high, op2.low);