From: Julian Seward <jseward@acm.org>
Date: Tue, 26 Dec 2006 02:24:12 +0000 (+0000)
Subject: Merge r1675 (x86 COPY-CondP rule)
X-Git-Tag: svn/VALGRIND_3_2_3^2~29
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=27f5f4f88190bc8e65cc7550cec3269bfda588ee;p=thirdparty%2Fvalgrind.git

Merge r1675 (x86 COPY-CondP rule)


git-svn-id: svn://svn.valgrind.org/vex/branches/VEX_3_2_BRANCH@1697
---

diff --git a/VEX/priv/guest-x86/ghelpers.c b/VEX/priv/guest-x86/ghelpers.c
index 9cfe7379b7..5ad6210aed 100644
--- a/VEX/priv/guest-x86/ghelpers.c
+++ b/VEX/priv/guest-x86/ghelpers.c
@@ -1161,6 +1161,23 @@ IRExpr* guest_x86_spechelper ( HChar* function_name,
             );
       }
 
+      if (isU32(cc_op, X86G_CC_OP_COPY) && isU32(cond, X86CondP)) {
+         /* COPY, then P --> extract P from dep1, and test (P == 1). */
+         return
+            unop(
+               Iop_1Uto32,
+               binop(
+                  Iop_CmpNE32,
+                  binop(
+                     Iop_And32,
+                     binop(Iop_Shr32, cc_dep1, mkU8(X86G_CC_SHIFT_P)),
+                     mkU32(1)
+                  ),
+                  mkU32(0)
+               )
+            );
+      }
+
       return NULL;
    }