commit c7b412ec6eab85152d75c9568221fe1eeb6edd55
author florian <florian@a5019735-40e9-0310-863c-91ae7b9d1cf9> Sat Sep 17 22:18:01 2011 +0000
committer florian <florian@a5019735-40e9-0310-863c-91ae7b9d1cf9> Sat Sep 17 22:18:01 2011 +0000
tree 774c239c9adac823391ffc5da9a11e24cb38ab83
parent 21f8bcf6850734ebdf773f5f6a071fa99fb1b765

Tweak s390x dispatcher. Using CG elminates two load insns.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12037 a5019735-40e9-0310-863c-91ae7b9d1cf9

coregrind/m_dispatch/dispatch-s390x-linux.S

diff --git a/coregrind/m_dispatch/dispatch-s390x-linux.S b/coregrind/m_dispatch/dispatch-s390x-linux.S
index b04d4fe..a3fbab4 100644
--- a/coregrind/m_dispatch/dispatch-s390x-linux.S
+++ b/coregrind/m_dispatch/dispatch-s390x-linux.S
@@ -173,10 +173,8 @@
         ahi  S390_REGNO_DISPATCH_CTR,-1
         jz   counter_is_zero
 
-
-        lg   %r10, 0(%r8,%r7)      /* .guest */
         lg   %r11, 8(%r8,%r7)      /* .host */
-        cgr  %r2, %r10
+        cg   %r2,  0(%r8,%r7)      /* next guest address == .guest ? */
         jne  fast_lookup_failed
 
         /* Found a match.  Call .host.
@@ -230,9 +228,8 @@
         ahi  S390_REGNO_DISPATCH_CTR,-1
         jz   counter_is_zero
 
-        lg   %r10, 0(%r8,%r7)      /* .guest */
         lg   %r11, 8(%r8,%r7)      /* .host */
-        cgr  %r2, %r10
+        cg   %r2,  0(%r8,%r7)      /* next guest address == .guest ? */
         jne  fast_lookup_failed
 
         /* sizeof(FastCacheEntry) == 16, sizeof(*UInt)==8 */