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Implement some ARM32 memory instructions and CMP (#565)

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* 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
This commit is contained in:
gdkchan 2019-01-29 13:06:11 -03:00 • committed by GitHub
parent 8f7fcede7f
commit c1bdf19061
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29 changed files with 686 additions and 87 deletions
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15
ChocolArm64/Decoders/OpCode32MemImm8.cs Normal file
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using ChocolArm64.Instructions;
namespace ChocolArm64.Decoders
{
class OpCode32MemImm8 : OpCode32Mem
{
public OpCode32MemImm8(Inst inst, long position, int opCode) : base(inst, position, opCode)
{
int imm4L = (opCode >> 0) & 0xf;
int imm4H = (opCode >> 8) & 0xf;
Imm = imm4L | (imm4H << 4);
}
}
}