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63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/*
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* Fast486 386/486 CPU Emulation Library
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* fpu.h
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*
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* Copyright (C) 2013 Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef _FPU_H_
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#define _FPU_H_
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#pragma once
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/* DEFINES ********************************************************************/
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#define FPU_CHECK() if (State->ControlRegisters[FAST486_REG_CR0] & FAST486_CR0_EM) \
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{ \
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Fast486Exception(State, FAST486_EXCEPTION_NM); \
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return FALSE; \
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}
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#define FPU_ST(i) State->FpuRegisters[(State->FpuStatus.Top + (i)) % FAST486_NUM_FPU_REGS]
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enum
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{
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FPU_SINGLE_PRECISION = 0,
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FPU_DOUBLE_PRECISION = 2,
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FPU_DOUBLE_EXT_PRECISION = 3
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};
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enum
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{
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FPU_TAG_VALID = 0,
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FPU_TAG_ZERO = 1,
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FPU_TAG_SPECIAL = 2,
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FPU_TAG_EMPTY = 3
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};
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD8);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeD9);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDA);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDB);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDC);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDD);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDE);
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FAST486_OPCODE_HANDLER(Fast486FpuOpcodeDF);
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#endif // _FPU_H_
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/* EOF */
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