[aandrejevic] 60261: [SOFT386] Implement the PUSHF instruction.

Author: aandrejevic
Date: Sat Sep 21 02:33:01 2013
New Revision: 60261

URL: http://svn.reactos.org/svn/reactos?rev=60261&view=rev
Log:
[SOFT386]
Implement the PUSHF instruction.


Modified:
    branches/ntvdm/lib/soft386/opcodes.c

Modified: branches/ntvdm/lib/soft386/opcodes.c
URL:
http://svn.reactos.org/svn/reactos/branches/ntvdm/lib/soft386/opcodes.c?rev…
==============================================================================
--- branches/ntvdm/lib/soft386/opcodes.c	[iso-8859-1] (original)
+++ branches/ntvdm/lib/soft386/opcodes.c	[iso-8859-1] Sat Sep 21 02:33:01 2013
@@ -4132,10 +4132,32 @@
 
 SOFT386_OPCODE_HANDLER(Soft386OpcodePushFlags)
 {
-    // TODO: NOT IMPLEMENTED
-    UNIMPLEMENTED;
-
-    return FALSE;
+    BOOLEAN Size = State->SegmentRegs[SOFT386_REG_CS].Size;
+
+    if (State->PrefixFlags & SOFT386_PREFIX_LOCK)
+    {
+        /* Invalid prefix */
+        Soft386Exception(State, SOFT386_EXCEPTION_UD);
+        return FALSE;
+    }
+
+    if (State->PrefixFlags & SOFT386_PREFIX_OPSIZE)
+    {
+        /* This OPSIZE prefix toggles the size */
+        Size = !Size;
+    }
+
+    /* Check for VM86 mode when IOPL is not 3 */
+    if (State->Flags.Vm && (State->Flags.Iopl != 3))
+    {
+        /* Call the VM86 monitor */
+        Soft386ExceptionWithErrorCode(State, SOFT386_EXCEPTION_GP, 0);
+        return FALSE;
+    }
+
+    /* Push the flags */
+    if (Size) return Soft386StackPush(State, State->Flags.Long);
+    else return Soft386StackPush(State, LOWORD(State->Flags.Long));
 }
 
 SOFT386_OPCODE_HANDLER(Soft386OpcodePopFlags)