[aandrejevic] 60752: [FAST486] Implement the CLTS instruction.

Author: aandrejevic
Date: Sat Oct 26 17:33:10 2013
New Revision: 60752

URL: http://svn.reactos.org/svn/reactos?rev=60752&view=rev
Log:
[FAST486]
Implement the CLTS instruction.


Modified:
    branches/ntvdm/lib/fast486/extraops.c
    branches/ntvdm/lib/fast486/extraops.h

Modified: branches/ntvdm/lib/fast486/extraops.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/fast486/extraops.c?re…
==============================================================================
--- branches/ntvdm/lib/fast486/extraops.c	[iso-8859-1] (original)
+++ branches/ntvdm/lib/fast486/extraops.c	[iso-8859-1] Sat Oct 26 17:33:10 2013
@@ -45,7 +45,7 @@
     NULL, // TODO: OPCODE 0x03 NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0x04 NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0x05 NOT IMPLEMENTED
-    NULL, // TODO: OPCODE 0x06 NOT IMPLEMENTED
+    Fast486ExtOpcodeClts,
     NULL, // TODO: OPCODE 0x07 NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0x08 NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0x09 NOT IMPLEMENTED
@@ -299,6 +299,23 @@
 
 /* PUBLIC FUNCTIONS ***********************************************************/
 
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeClts)
+{
+    NO_LOCK_PREFIX();
+
+    /* The current privilege level must be zero */
+    if (Fast486GetCurrentPrivLevel(State) != 0)
+    {
+        Fast486Exception(State, FAST486_EXCEPTION_GP);
+        return FALSE;
+    }
+
+    /* Clear the task switch bit */
+    State->ControlRegisters[FAST486_REG_CR0] &= ~FAST486_CR0_TS;
+
+    return TRUE;
+}
+
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreControlReg)
 {
     BOOLEAN AddressSize = State->SegmentRegs[FAST486_REG_CS].Size;

Modified: branches/ntvdm/lib/fast486/extraops.h
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/fast486/extraops.h?re…
==============================================================================
--- branches/ntvdm/lib/fast486/extraops.h	[iso-8859-1] (original)
+++ branches/ntvdm/lib/fast486/extraops.h	[iso-8859-1] Sat Oct 26 17:33:10 2013
@@ -23,6 +23,7 @@
 #define _EXTRAOPS_H_
 
 /* DEFINES ********************************************************************/
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodeClts);
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreControlReg);
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeStoreDebugReg);
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeLoadControlReg);