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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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GPG key ID: 4AEE18F83AFDEB23
29 changed files with 686 additions and 87 deletions
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26
ChocolArm64/Instructions/InstEmitAlu32.cs
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@ -12,7 +12,7 @@ namespace ChocolArm64.Instructions
{
public static void Add(ILEmitterCtx context)
{
IOpCodeAlu32 op = (IOpCodeAlu32)context.CurrOp;
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOpers(context, setCarry: false);
@ -29,9 +29,25 @@ namespace ChocolArm64.Instructions
EmitAluStore(context);
}
public static void Cmp(ILEmitterCtx context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOpers(context, setCarry: false);
context.Emit(OpCodes.Sub);
context.EmitZnFlagCheck();
EmitSubsCCheck(context);
EmitSubsVCheck(context);
context.Emit(OpCodes.Pop);
}
public static void Mov(ILEmitterCtx context)
{
IOpCodeAlu32 op = (IOpCodeAlu32)context.CurrOp;
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOper2(context);
@ -45,7 +61,7 @@ namespace ChocolArm64.Instructions
public static void Sub(ILEmitterCtx context)
{
IOpCodeAlu32 op = (IOpCodeAlu32)context.CurrOp;
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
EmitAluLoadOpers(context, setCarry: false);
@ -64,7 +80,7 @@ namespace ChocolArm64.Instructions
private static void EmitAluStore(ILEmitterCtx context)
{
IOpCodeAlu32 op = (IOpCodeAlu32)context.CurrOp;
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
if (op.Rd == RegisterAlias.Aarch32Pc)
{
@ -106,6 +122,8 @@ namespace ChocolArm64.Instructions
private static void EmitAluWritePc(ILEmitterCtx context)
{
context.EmitStoreState();
if (IsThumb(context.CurrOp))
{
context.EmitLdc_I4(~1);