[aandrejevic] 60621: [SOFT386] Improve the performance of Soft386CalculateParity.

Author: aandrejevic
Date: Fri Oct 11 20:54:46 2013
New Revision: 60621

URL: http://svn.reactos.org/svn/reactos?rev=60621&view=rev
Log:
[SOFT386]
Improve the performance of Soft386CalculateParity.

Modified:
    branches/ntvdm/lib/soft386/common.inl

Modified: branches/ntvdm/lib/soft386/common.inl
URL: http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/soft386/common.inl?rev...
==============================================================================
--- branches/ntvdm/lib/soft386/common.inl	[iso-8859-1] (original)
+++ branches/ntvdm/lib/soft386/common.inl	[iso-8859-1] Fri Oct 11 20:54:46 2013
@@ -436,10 +436,7 @@
 BOOLEAN
 Soft386CalculateParity(UCHAR Number)
 {
-    Number ^= Number >> 1;
-    Number ^= Number >> 2;
-    Number ^= Number >> 4;
-    return !(Number & 1);
+    return (0x9669 >> ((Number & 0x0F) ^ (Number >> 4))) & 1;
 }

FORCEINLINE