[FAST486]

Start implementing the FPU. Stubplement the FPU opcode handlers.


svn path=/branches/ntvdm/; revision=61141

include/reactos/libs/fast486/fast486.h

@@ -34,6 +34,7 @@
 #define FAST486_NUM_SEG_REGS    6
 #define FAST486_NUM_CTRL_REGS   3
 #define FAST486_NUM_DBG_REGS    6
+#define FAST486_NUM_FPU_REGS    8
 
 #define FAST486_CR0_PE  (1 << 0)
 #define FAST486_CR0_MP  (1 << 1)
@@ -376,6 +377,55 @@ typedef struct _FAST486_TSS
     ULONG IopbOffset;
 } FAST486_TSS, *PFAST486_TSS;
 
+typedef struct _FAST486_FPU_DATA_REG
+{
+    ULONGLONG Mantissa;
+    USHORT Exponent;
+} FAST486_FPU_DATA_REG, *PFAST486_FPU_DATA_REG;
+
+typedef union _FAST486_FPU_STATUS_REG
+{
+    USHORT Value;
+
+    struct
+    {
+        ULONG Ie : 1;
+        ULONG De : 1;
+        ULONG Ze : 1;
+        ULONG Oe : 1;
+        ULONG Ue : 1;
+        ULONG Pe : 1;
+        ULONG Sf : 1;
+        ULONG Es : 1;
+        ULONG Code0 : 1;
+        ULONG Code1 : 1;
+        ULONG Code2 : 1;
+        ULONG Top : 3;
+        ULONG Code3 : 1;
+        ULONG Busy : 1;
+    };
+} FAST486_FPU_STATUS_REG, *PFAST486_FPU_STATUS_REG;
+
+typedef union _FAST486_FPU_CONTROL_REG
+{
+    USHORT Value;
+
+    struct
+    {
+        ULONG Im : 1;
+        ULONG Dm : 1;
+        ULONG Zm : 1;
+        ULONG Om : 1;
+        ULONG Um : 1;
+        ULONG Pm : 1;
+        ULONG Reserved : 2;
+        ULONG Pc : 2;
+        ULONG Rc : 2;
+        ULONG Inf : 1;
+        // ULONG Reserved1 : 3;
+    };
+} FAST486_FPU_CONTROL_REG, *PFAST486_FPU_CONTROL_REG;
+
 struct _FAST486_STATE
 {
     FAST486_MEM_READ_PROC MemReadCallback;
@@ -399,6 +449,10 @@ struct _FAST486_STATE
     FAST486_INT_STATUS IntStatus;
     UCHAR PendingIntNum;
     PULONG Tlb;
+    FAST486_FPU_DATA_REG FpuRegisters[FAST486_NUM_FPU_REGS];
+    FAST486_FPU_STATUS_REG FpuStatus;
+    FAST486_FPU_CONTROL_REG FpuControl;
+    USHORT FpuTag;
 };
 
 /* FUNCTIONS ******************************************************************/

lib/fast486/CMakeLists.txt

@@ -6,6 +6,7 @@ list(APPEND SOURCE
     opcodes.c
     opgroups.c
     extraops.c
-    common.c)
+    common.c
+    fpu.c)
 
 add_library(fast486 ${SOURCE})

lib/fast486/fpu.c

@@ -0,0 +1,100 @@
+/*
+ * Fast486 386/486 CPU Emulation Library
+ * fpu.c
+ *
+ * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+/* INCLUDES *******************************************************************/
+
+#include <windef.h>
+
+// #define NDEBUG
+#include <debug.h>
+
+#include <fast486.h>
+#include "common.h"
+#include "opcodes.h"
+#include "fpu.h"
+
+/* PUBLIC FUNCTIONS ***********************************************************/
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDA)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDB)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDC)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDD)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDE)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDF)
+{
+    // TODO: NOT IMPLEMENTED
+    UNIMPLEMENTED;
+    Fast486Exception(State, FAST486_EXCEPTION_UD);
+    return FALSE;
+}
+
+/* EOF */

lib/fast486/fpu.h

@@ -0,0 +1,55 @@
+/*
+ * Fast486 386/486 CPU Emulation Library
+ * fpu.h
+ *
+ * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef _FPU_H_
+#define _FPU_H_
+
+#pragma once
+
+/* DEFINES ********************************************************************/
+
+enum
+{
+    FPU_SINGLE_PRECISION = 0,
+    FPU_DOUBLE_PRECISION = 2,
+    FPU_DOUBLE_EXT_PRECISION = 3
+};
+
+enum
+{
+    FPU_TAG_VALID = 0,
+    FPU_TAG_ZERO = 1,
+    FPU_TAG_SPECIAL = 2,
+    FPU_TAG_EMPTY = 3
+};
+
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDA);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDB);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDC);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDD);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDE);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDF);
+
+#endif // _FPU_H_
+
+/* EOF */

lib/fast486/opcodes.c

@@ -31,6 +31,7 @@
 #include "opgroups.h"
 #include "extraops.h"
 #include "common.h"
+#include "fpu.h"
 
 /* PUBLIC VARIABLES ***********************************************************/
 
@@ -253,14 +254,14 @@ Fast486OpcodeHandlers[FAST486_NUM_OPCODE_HANDLERS] =
     Fast486OpcodeAad,
     Fast486OpcodeSalc,
     Fast486OpcodeXlat,
-    NULL, // TODO: OPCODE 0xD8 NOT SUPPORTED
+    Fast486FpuOpcodeD8,
-    NULL, // TODO: OPCODE 0xD9 NOT SUPPORTED
+    Fast486FpuOpcodeD9,
-    NULL, // TODO: OPCODE 0xDA NOT SUPPORTED
+    Fast486FpuOpcodeDA,
-    NULL, // TODO: OPCODE 0xDB NOT SUPPORTED
+    Fast486FpuOpcodeDB,
-    NULL, // TODO: OPCODE 0xDC NOT SUPPORTED
+    Fast486FpuOpcodeDC,
-    NULL, // TODO: OPCODE 0xDD NOT SUPPORTED
+    Fast486FpuOpcodeDD,
-    NULL, // TODO: OPCODE 0xDE NOT SUPPORTED
+    Fast486FpuOpcodeDE,
-    NULL, // TODO: OPCODE 0xDF NOT SUPPORTED
+    Fast486FpuOpcodeDF,
     Fast486OpcodeLoop,
     Fast486OpcodeLoop,
     Fast486OpcodeLoop,