2019-01-24 17:59:53 -08:00
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using ChocolArm64.Instructions;
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namespace ChocolArm64.Decoders
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{
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Implement some ARM32 memory instructions and CMP (#565)
* Implement ARM32 memory instructions: LDM, LDR, LDRB, LDRD, LDRH, LDRSB, LDRSH, STM, STR, STRB, STRD, STRH (immediate and register + immediate variants), implement CMP (immediate and register shifted by immediate variants)
* Rename some opcode classes and flag masks for consistency
* Fix a few suboptimal ARM32 codegen issues, only loads should be considered on decoder when checking if Rt == PC, and only NZCV flags should be considered for comparison optimizations
* Take into account Rt2 for LDRD instructions aswell when checking if the instruction changes PC
* Re-align arm32 instructions on the opcode table
2019-01-29 08:06:11 -08:00
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class OpCodeT16AluImm8 : OpCodeT16, IOpCode32Alu
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2019-01-24 17:59:53 -08:00
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{
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private int _rdn;
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public int Rd => _rdn;
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public int Rn => _rdn;
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public bool SetFlags => false;
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public int Imm { get; private set; }
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Implement some ARM32 memory instructions and CMP (#565)
* Implement ARM32 memory instructions: LDM, LDR, LDRB, LDRD, LDRH, LDRSB, LDRSH, STM, STR, STRB, STRD, STRH (immediate and register + immediate variants), implement CMP (immediate and register shifted by immediate variants)
* Rename some opcode classes and flag masks for consistency
* Fix a few suboptimal ARM32 codegen issues, only loads should be considered on decoder when checking if Rt == PC, and only NZCV flags should be considered for comparison optimizations
* Take into account Rt2 for LDRD instructions aswell when checking if the instruction changes PC
* Re-align arm32 instructions on the opcode table
2019-01-29 08:06:11 -08:00
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public OpCodeT16AluImm8(Inst inst, long position, int opCode) : base(inst, position, opCode)
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2019-01-24 17:59:53 -08:00
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{
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Imm = (opCode >> 0) & 0xff;
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_rdn = (opCode >> 8) & 0x7;
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}
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}
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}
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