From a98544e517b5b3f8340422cef2018e0bad58ed12 Mon Sep 17 00:00:00 2001
From: Aleksandar Andrejevic <aandrejevic@reactos.org>
Date: Sat, 19 Oct 2013 18:36:04 +0000
Subject: [PATCH] [FAST486] Implement PUSH/POP FS/GS.

svn path=/branches/ntvdm/; revision=60711
---
 lib/fast486/extraops.c | 48 ++++++++++++++++++++++++++++++++++++++----
 lib/fast486/extraops.h |  4 ++++
 2 files changed, 48 insertions(+), 4 deletions(-)

diff --git a/lib/fast486/extraops.c b/lib/fast486/extraops.c
index 18dc09aaaec..de06eff2ed3 100644
--- a/lib/fast486/extraops.c
+++ b/lib/fast486/extraops.c
@@ -198,16 +198,16 @@ Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
     Fast486ExtOpcodeConditionalSet,
     Fast486ExtOpcodeConditionalSet,
     Fast486ExtOpcodeConditionalSet,
-    NULL, // TODO: OPCODE 0xA0 NOT IMPLEMENTED
-    NULL, // TODO: OPCODE 0xA1 NOT IMPLEMENTED
+    Fast486ExtOpcodePushFs,
+    Fast486ExtOpcodePopFs,
     NULL, // Invalid
     NULL, // TODO: OPCODE 0xA3 NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0xA4 NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0xA5 NOT IMPLEMENTED
     NULL, // Invalid
     NULL, // Invalid
-    NULL, // TODO: OPCODE 0xA8 NOT IMPLEMENTED
-    NULL, // TODO: OPCODE 0xA9 NOT IMPLEMENTED
+    Fast486ExtOpcodePushGs,
+    Fast486ExtOpcodePopGs,
     NULL, // TODO: OPCODE 0xAA NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0xAB NOT IMPLEMENTED
     NULL, // TODO: OPCODE 0xAC NOT IMPLEMENTED
@@ -298,6 +298,46 @@ Fast486ExtendedHandlers[FAST486_NUM_OPCODE_HANDLERS] =
 
 /* PUBLIC FUNCTIONS ***********************************************************/
 
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushFs)
+{
+    /* Call the internal API */
+    return Fast486StackPush(State, State->SegmentRegs[FAST486_REG_FS].Selector);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePopFs)
+{
+    ULONG NewSelector;
+
+    if (!Fast486StackPop(State, &NewSelector))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
+
+    /* Call the internal API */
+    return Fast486LoadSegment(State, FAST486_REG_FS, LOWORD(NewSelector));
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushGs)
+{
+    /* Call the internal API */
+    return Fast486StackPush(State, State->SegmentRegs[FAST486_REG_GS].Selector);
+}
+
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePopGs)
+{
+    ULONG NewSelector;
+
+    if (!Fast486StackPop(State, &NewSelector))
+    {
+        /* Exception occurred */
+        return FALSE;
+    }
+
+    /* Call the internal API */
+    return Fast486LoadSegment(State, FAST486_REG_GS, LOWORD(NewSelector));
+}
+
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeConditionalJmp)
 {
     BOOLEAN Jump = FALSE;
diff --git a/lib/fast486/extraops.h b/lib/fast486/extraops.h
index 8b3eeefdd76..7010ffc163c 100644
--- a/lib/fast486/extraops.h
+++ b/lib/fast486/extraops.h
@@ -23,6 +23,10 @@
 #define _EXTRAOPS_H_
 
 /* DEFINES ********************************************************************/
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushFs);
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePopFs);
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePushGs);
+FAST486_OPCODE_HANDLER(Fast486ExtOpcodePopGs);
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeConditionalJmp);
 FAST486_OPCODE_HANDLER(Fast486ExtOpcodeConditionalSet);
 FAST486_OPCODE_HANDLER(Fast486OpcodeExtended);
-- 
2.17.1