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Implement PLD and SUB (imm16) on T32, plus UADD8, SADD8, USUB8 and SSUB8 on both A32 and T32 (#3693)

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gdkchan 2022-09-13 19:51:40 -03:00 • committed by GitHub
parent e05bf90af6
commit 8e119a1e96
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6 changed files with 168 additions and 41 deletions
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88
ARMeilleure/Instructions/InstEmitAlu32.cs
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@ -363,6 +363,11 @@ namespace ARMeilleure.Instructions
EmitAluStore(context, res);
}
public static void Sadd8(ArmEmitterContext context)
{
EmitAddSub8(context, add: true, unsigned: false);
}
public static void Sbc(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
@ -401,17 +406,38 @@ namespace ARMeilleure.Instructions
public static void Sdiv(ArmEmitterContext context)
{
EmitDiv(context, false);
EmitDiv(context, unsigned: false);
}
public static void Sel(ArmEmitterContext context)
{
IOpCode32AluReg op = (IOpCode32AluReg)context.CurrOp;
Operand n = GetIntA32(context, op.Rn);
Operand m = GetIntA32(context, op.Rm);
Operand ge0 = context.ZeroExtend8(OperandType.I32, context.Negate(GetFlag(PState.GE0Flag)));
Operand ge1 = context.ZeroExtend8(OperandType.I32, context.Negate(GetFlag(PState.GE1Flag)));
Operand ge2 = context.ZeroExtend8(OperandType.I32, context.Negate(GetFlag(PState.GE2Flag)));
Operand ge3 = context.Negate(GetFlag(PState.GE3Flag));
Operand mask = context.BitwiseOr(ge0, context.ShiftLeft(ge1, Const(8)));
mask = context.BitwiseOr(mask, context.ShiftLeft(ge2, Const(16)));
mask = context.BitwiseOr(mask, context.ShiftLeft(ge3, Const(24)));
Operand res = context.BitwiseOr(context.BitwiseAnd(n, mask), context.BitwiseAnd(m, context.BitwiseNot(mask)));
SetIntA32(context, op.Rd, res);
}
public static void Shadd8(ArmEmitterContext context)
{
EmitHadd8(context, false);
EmitHadd8(context, unsigned: false);
}
public static void Shsub8(ArmEmitterContext context)
{
EmitHsub8(context, false);
EmitHsub8(context, unsigned: false);
}
public static void Ssat(ArmEmitterContext context)
@ -428,6 +454,11 @@ namespace ARMeilleure.Instructions
EmitSat16(context, -(1 << op.SatImm), (1 << op.SatImm) - 1);
}
public static void Ssub8(ArmEmitterContext context)
{
EmitAddSub8(context, add: false, unsigned: false);
}
public static void Sub(ArmEmitterContext context)
{
IOpCode32Alu op = (IOpCode32Alu)context.CurrOp;
@ -482,6 +513,11 @@ namespace ARMeilleure.Instructions
EmitNZFlagsCheck(context, res);
}
public static void Uadd8(ArmEmitterContext context)
{
EmitAddSub8(context, add: true, unsigned: true);
}
public static void Ubfx(ArmEmitterContext context)
{
IOpCode32AluBf op = (IOpCode32AluBf)context.CurrOp;
@ -496,17 +532,17 @@ namespace ARMeilleure.Instructions
public static void Udiv(ArmEmitterContext context)
{
EmitDiv(context, true);
EmitDiv(context, unsigned: true);
}
public static void Uhadd8(ArmEmitterContext context)
{
EmitHadd8(context, true);
EmitHadd8(context, unsigned: true);
}
public static void Uhsub8(ArmEmitterContext context)
{
EmitHsub8(context, true);
EmitHsub8(context, unsigned: true);
}
public static void Usat(ArmEmitterContext context)
@ -523,6 +559,11 @@ namespace ARMeilleure.Instructions
EmitSat16(context, 0, (1 << op.SatImm) - 1);
}
public static void Usub8(ArmEmitterContext context)
{
EmitAddSub8(context, add: false, unsigned: true);
}
public static void Uxtb(ArmEmitterContext context)
{
EmitSignExtend(context, false, 8);
@ -678,9 +719,40 @@ namespace ARMeilleure.Instructions
context.MarkLabel(lblEnd);
}
private static void EmitAddSub8(ArmEmitterContext context, bool add, bool unsigned)
{
IOpCode32AluReg op = (IOpCode32AluReg)context.CurrOp;
Operand n = GetIntA32(context, op.Rn);
Operand m = GetIntA32(context, op.Rm);
Operand res = Const(0);
for (int byteSel = 0; byteSel < 4; byteSel++)
{
Operand shift = Const(byteSel * 8);
Operand nByte = context.ShiftRightUI(n, shift);
Operand mByte = context.ShiftRightUI(m, shift);
nByte = unsigned ? context.ZeroExtend8(OperandType.I32, nByte) : context.SignExtend8(OperandType.I32, nByte);
mByte = unsigned ? context.ZeroExtend8(OperandType.I32, mByte) : context.SignExtend8(OperandType.I32, mByte);
Operand resByte = add ? context.Add(nByte, mByte) : context.Subtract(nByte, mByte);
res = context.BitwiseOr(res, context.ShiftLeft(context.ZeroExtend8(OperandType.I32, resByte), shift));
SetFlag(context, PState.GE0Flag + byteSel, unsigned && add
? context.ShiftRightUI(resByte, Const(8))
: context.ShiftRightUI(context.BitwiseNot(resByte), Const(31)));
}
SetIntA32(context, op.Rd, res);
}
private static void EmitHadd8(ArmEmitterContext context, bool unsigned)
{
OpCode32AluReg op = (OpCode32AluReg)context.CurrOp;
IOpCode32AluReg op = (IOpCode32AluReg)context.CurrOp;
Operand m = GetIntA32(context, op.Rm);
Operand n = GetIntA32(context, op.Rn);
@ -710,7 +782,7 @@ namespace ARMeilleure.Instructions
private static void EmitHsub8(ArmEmitterContext context, bool unsigned)
{
OpCode32AluReg op = (OpCode32AluReg)context.CurrOp;
IOpCode32AluReg op = (IOpCode32AluReg)context.CurrOp;
Operand m = GetIntA32(context, op.Rm);
Operand n = GetIntA32(context, op.Rn);