[FAST486]

[reactos.git] / reactos / lib / fast486 / fpu.h

diff --git a/reactos/lib/fast486/fpu.h b/reactos/lib/fast486/fpu.h
index 63128a4..b23c795 100644 (file)
--- a/reactos/lib/fast486/fpu.h
+++ b/reactos/lib/fast486/fpu.h
@@ -2,7 +2,7 @@
  * Fast486 386/486 CPU Emulation Library
  * fpu.h
  *
- * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
+ * Copyright (C) 2014 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
@@ -24,14 +24,34 @@
 
 #pragma once
 
+#include "opcodes.h"
+
 /* DEFINES ********************************************************************/
 
 #define FPU_CHECK() if (State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_EM) \
                     { \
                         Fast486Exception(State, FAST486_EXCEPTION_NM); \
-                        return FALSE; \
+                        return; \
                     }
 #define FPU_ST(i) State->FpuRegisters[(State->FpuStatus.Top + (i)) % FAST486_NUM_FPU_REGS]
+#define FPU_GET_TAG(i)  ((State->FpuTag >> ((i) * 2)) & 3)
+#define FPU_SET_TAG(i, t)   { \
+                                State->FpuTag &= ~((1 << ((i) * 2)) | (1 << (((i) * 2) + 1))); \
+                                State->FpuTag |= ((t) & 3) << ((i) * 2); \
+                            }
+
+#define FPU_REAL4_BIAS 0x7F
+#define FPU_REAL8_BIAS 0x3FF
+#define FPU_REAL10_BIAS 0x3FFF
+#define FPU_MAX_EXPONENT 0x7FFE
+#define FPU_MANTISSA_HIGH_BIT 0x8000000000000000ULL
+
+#define FPU_IS_NORMALIZED(x) (!FPU_IS_ZERO(x) && (((x)->Mantissa & FPU_MANTISSA_HIGH_BIT) != 0ULL))
+#define FPU_IS_ZERO(x) ((x)->Mantissa == 0ULL)
+#define FPU_IS_NAN(x) ((x)->Exponent == (FPU_MAX_EXPONENT + 1))
+#define FPU_IS_INFINITY(x) (FPU_IS_NAN(x) && (x)->Mantissa & FPU_MANTISSA_HIGH_BIT)
+#define FPU_IS_POS_INF(x) (FPU_IS_INFINITY(x) && !(x)->Sign)
+#define FPU_IS_NEG_INF(x) (FPU_IS_INFINITY(x) && (x)->Sign)
 
 enum
 {
@@ -48,11 +68,10 @@ enum
     FPU_TAG_EMPTY = 3
 };
 
-FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8);
+FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8DC);
 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);