From f115c1234692364f3f097a416e4a6e21abf0cbf3 Mon Sep 17 00:00:00 2001
From: grischka <grischka>
Date: Sat, 6 Aug 2011 16:08:03 +0200
Subject: x86-64: fix flags and zero-pad long doubles

This fixes a bug introduced in commit
    8d107d9ffd8126d82b1c56be47431a6bcef39f08
that produced wrong code because of interference between
0x10 bits VT_CONST and x86_64-gen.c:TREG_MEM

Also fully zero-pad long doubles on x86-64 to avoid random
bytes in output files which disturb file comparison.
---
 tccgen.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'tccgen.c')

diff --git a/tccgen.c b/tccgen.c
index 2df5de5..c800acc 100644
--- a/tccgen.c
+++ b/tccgen.c
@@ -709,8 +709,12 @@ ST_FUNC int gv(int rc)
             /* XXX: not portable yet */
 #if defined(__i386__) || defined(__x86_64__)
             /* Zero pad x87 tenbyte long doubles */
-            if (size == LDOUBLE_SIZE)
+            if (size == LDOUBLE_SIZE) {
                 vtop->c.tab[2] &= 0xffff;
+#if LDOUBLE_SIZE == 16
+                vtop->c.tab[3] = 0;
+#endif
+            }
 #endif
             ptr = section_ptr_add(data_section, size);
             size = size >> 2;
-- 
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