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using ChocolArm64.Decoders;
using ChocolArm64.Translation;
using System.Reflection.Emit;
namespace ChocolArm64.Instructions
{
static partial class InstEmit
{
public static void Madd(ILEmitterCtx context) => EmitMul(context, OpCodes.Add);
public static void Msub(ILEmitterCtx context) => EmitMul(context, OpCodes.Sub);
private static void EmitMul(ILEmitterCtx context, OpCode ilOp)
{
OpCodeMul64 op = (OpCodeMul64)context.CurrOp;
context.EmitLdintzr(op.Ra);
context.EmitLdintzr(op.Rn);
context.EmitLdintzr(op.Rm);
context.Emit(OpCodes.Mul);
context.Emit(ilOp);
context.EmitStintzr(op.Rd);
}
public static void Smaddl(ILEmitterCtx context) => EmitMull(context, OpCodes.Add, true);
public static void Smsubl(ILEmitterCtx context) => EmitMull(context, OpCodes.Sub, true);
public static void Umaddl(ILEmitterCtx context) => EmitMull(context, OpCodes.Add, false);
public static void Umsubl(ILEmitterCtx context) => EmitMull(context, OpCodes.Sub, false);
private static void EmitMull(ILEmitterCtx context, OpCode addSubOp, bool signed)
{
OpCodeMul64 op = (OpCodeMul64)context.CurrOp;
OpCode castOp = signed
? OpCodes.Conv_I8
: OpCodes.Conv_U8;
context.EmitLdintzr(op.Ra);
context.EmitLdintzr(op.Rn);
context.Emit(OpCodes.Conv_I4);
context.Emit(castOp);
context.EmitLdintzr(op.Rm);
context.Emit(OpCodes.Conv_I4);
context.Emit(castOp);
context.Emit(OpCodes.Mul);
context.Emit(addSubOp);
context.EmitStintzr(op.Rd);
}
public static void Smulh(ILEmitterCtx context)
{
OpCodeMul64 op = (OpCodeMul64)context.CurrOp;
context.EmitLdintzr(op.Rn);
context.EmitLdintzr(op.Rm);
SoftFallback.EmitCall(context, nameof(SoftFallback.SMulHi128));
context.EmitStintzr(op.Rd);
}
public static void Umulh(ILEmitterCtx context)
{
OpCodeMul64 op = (OpCodeMul64)context.CurrOp;
context.EmitLdintzr(op.Rn);
context.EmitLdintzr(op.Rm);
SoftFallback.EmitCall(context, nameof(SoftFallback.UMulHi128));
context.EmitStintzr(op.Rd);
}
}
}
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