64 lines
1.7 KiB
C
64 lines
1.7 KiB
C
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/****************************************************************************
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* *
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* Project64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2012 Project64. All rights reserved. *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* *
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****************************************************************************/
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#pragma once
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#pragma warning(push)
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#pragma warning(disable : 4201) // warning C4201: nonstandard extension used : nameless struct/union
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union ArmThumbOpcode
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{
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uint16_t Hex;
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uint8_t Ascii[2];
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struct
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{
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unsigned rt : 3;
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unsigned rn : 3;
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unsigned rm : 3;
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unsigned opcode : 7;
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};
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};
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union Arm32Opcode
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{
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uint32_t Hex;
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uint8_t Ascii[4];
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// uint16 + uint16 type instuction
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struct
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{
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unsigned rn : 4;
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unsigned opcode : 12;
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unsigned rm : 4;
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unsigned imm2 : 2;
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unsigned reserved : 6;
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unsigned rt : 4;
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} uint16;
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struct
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{
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unsigned rm : 4;
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unsigned opcode2 : 8;
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unsigned rt : 4;
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unsigned rn : 4;
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unsigned opcode : 12;
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} uint32;
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};
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#pragma warning(pop)
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enum ArmThumbOpCodes
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{
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ArmSTR_Reg = 40,
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ArmLDR_Reg = 44,
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ArmLDRH_Reg = 0xE19,
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ArmLDRH_W = 0xF83,
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};
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