reactos/lib/fast486/fpu.h

   1 /*
   2  * Fast486 386/486 CPU Emulation Library
   3  * fpu.h
   4  *
   5  * Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  20  */
  21
  22 #ifndef _FPU_H_
  23 #define _FPU_H_
  24
  25 #pragma once
  26
  27 /* DEFINES ********************************************************************/
  28
  29 #define FPU_CHECK() if (State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_EM) \
  30                     { \
  31                         Fast486Exception(State, FAST486_EXCEPTION_NM); \
  32                         return FALSE; \
  33                     }
  34 #define FPU_ST(i) State->FpuRegisters[(State->FpuStatus.Top + (i)) % FAST486_NUM_FPU_REGS]
  35
  36 enum
  37 {
  38     FPU_SINGLE_PRECISION = 0,
  39     FPU_DOUBLE_PRECISION = 2,
  40     FPU_DOUBLE_EXT_PRECISION = 3
  41 };
  42
  43 enum
  44 {
  45     FPU_TAG_VALID = 0,
  46     FPU_TAG_ZERO = 1,
  47     FPU_TAG_SPECIAL = 2,
  48     FPU_TAG_EMPTY = 3
  49 };
  50
  51 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8);
  52 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9);
  53 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDA);
  54 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDB);
  55 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDC);
  56 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDD);
  57 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDE);
  58 FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDF);
  59
  60 #endif // _FPU_H_
  61
  62 /* EOF */