From: Julian Seward <jseward@acm.org>
Date: Sat, 23 Oct 2004 01:13:57 +0000 (+0000)
Subject: Fast-case some more stuff.
X-Git-Tag: svn/VALGRIND_3_0_1^2~932
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=29ab2efe621dda9630a07b3a3cfc42c3a83e0b97;p=thirdparty%2Fvalgrind.git

Fast-case some more stuff.


git-svn-id: svn://svn.valgrind.org/vex/trunk@402
---

diff --git a/VEX/priv/guest-x86/ghelpers.c b/VEX/priv/guest-x86/ghelpers.c
index 122c8ccd29..1717a7dc55 100644
--- a/VEX/priv/guest-x86/ghelpers.c
+++ b/VEX/priv/guest-x86/ghelpers.c
@@ -494,12 +494,23 @@ UInt calculate_eflags_all ( UInt cc_op, UInt cc_src_formal, UInt cc_dst_formal )
 static UInt calculate_eflags_c ( UInt cc_op, UInt cc_src, UInt cc_dst )
 {
    /* Fast-case some common ones. */
-   if (cc_op == CC_OP_LOGICL)
-      return 0;
-   if (cc_op == CC_OP_DECL)
-      return cc_src;
-   if (cc_op == CC_OP_SUBL)
-      return ( ((UInt)cc_src) > ((UInt)cc_dst) ) ? CC_MASK_C : 0;
+   switch (cc_op) {
+      case CC_OP_LOGICL: case CC_OP_LOGICW: case CC_OP_LOGICB:
+         return 0;
+      case CC_OP_DECL:
+         return cc_src;
+      case CC_OP_SUBL:
+         return ( ((UInt)cc_src) > ((UInt)cc_dst) ) 
+                   ? CC_MASK_C : 0;
+      case CC_OP_ADDL:
+         return ( ((UInt)cc_src + (UInt)cc_dst) < ((UInt)cc_src) ) 
+                   ? CC_MASK_C : 0;
+      case CC_OP_SUBB:
+         return ( ((UInt)(cc_src & 0xFF)) > ((UInt)(cc_dst & 0xFF)) ) 
+                   ? CC_MASK_C : 0;
+      default: 
+         break;
+   }
 
 #  if PROFILE_EFLAGS
    if (!initted)