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CPU: This PR fixes Fpscr, among other things. (#1433)

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* CPU: This PR fixes Fpscr, among other things.

* Add Fpscr.Qc = 1 if sat. for Vqrshrn & Vqrshrun.

* Fix Vcmp & Vcmpe opcode table.

* Revert "Fix Vcmp & Vcmpe opcode table."

This reverts commit c117d9410d693185ff5f8ee8e457ffbfb2027dd5.

* Address PR feedbacks.
This commit is contained in:
LDj3SNuD 2020-08-08 17:18:51 +02:00 • committed by GitHub
parent 8d59ad88b4
commit e36e97c64d
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GPG key ID: 4AEE18F83AFDEB23
19 changed files with 342 additions and 178 deletions
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54
ARMeilleure/Instructions/InstEmitSystem32.cs
View file

@ -186,14 +186,12 @@ namespace ARMeilleure.Instructions
return;
}
MethodInfo info;
switch (op.Sreg)
{
case 0b0000: // FPSID
throw new NotImplementedException("Supervisor Only");
case 0b0001: // FPSCR
info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpscr)); break;
EmitGetFpscr(context); return;
case 0b0101: // MVFR2
throw new NotImplementedException("MVFR2");
case 0b0110: // MVFR1
@ -205,22 +203,18 @@ namespace ARMeilleure.Instructions
default:
throw new NotImplementedException($"Unknown VMRS 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
SetIntA32(context, op.Rt, context.Call(info));
}
public static void Vmsr(ArmEmitterContext context)
{
OpCode32SimdSpecial op = (OpCode32SimdSpecial)context.CurrOp;
MethodInfo info;
switch (op.Sreg)
{
case 0b0000: // FPSID
throw new NotImplementedException("Supervisor Only");
case 0b0001: // FPSCR
info = typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetFpscr)); break;
EmitSetFpscr(context); return;
case 0b0101: // MVFR2
throw new NotImplementedException("MVFR2");
case 0b0110: // MVFR1
@ -232,8 +226,6 @@ namespace ARMeilleure.Instructions
default:
throw new NotImplementedException($"Unknown VMSR 0x{op.RawOpCode:X8} at 0x{op.Address:X16}.");
}
context.Call(info, GetIntA32(context, op.Rt));
}
private static void EmitSetNzcv(ArmEmitterContext context, Operand t)
@ -255,5 +247,47 @@ namespace ARMeilleure.Instructions
SetFlag(context, PState.ZFlag, z);
SetFlag(context, PState.NFlag, n);
}
private static void EmitGetFpscr(ArmEmitterContext context)
{
OpCode32SimdSpecial op = (OpCode32SimdSpecial)context.CurrOp;
Operand vSh = context.ShiftLeft(GetFpFlag(FPState.VFlag), Const((int)FPState.VFlag));
Operand cSh = context.ShiftLeft(GetFpFlag(FPState.CFlag), Const((int)FPState.CFlag));
Operand zSh = context.ShiftLeft(GetFpFlag(FPState.ZFlag), Const((int)FPState.ZFlag));
Operand nSh = context.ShiftLeft(GetFpFlag(FPState.NFlag), Const((int)FPState.NFlag));
Operand nzcvSh = context.BitwiseOr(context.BitwiseOr(nSh, zSh), context.BitwiseOr(cSh, vSh));
Operand fpscr = context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.GetFpscr)));
SetIntA32(context, op.Rt, context.BitwiseOr(nzcvSh, fpscr));
}
private static void EmitSetFpscr(ArmEmitterContext context)
{
OpCode32SimdSpecial op = (OpCode32SimdSpecial)context.CurrOp;
Operand t = GetIntA32(context, op.Rt);
Operand v = context.ShiftRightUI(t, Const((int)FPState.VFlag));
v = context.BitwiseAnd(v, Const(1));
Operand c = context.ShiftRightUI(t, Const((int)FPState.CFlag));
c = context.BitwiseAnd(c, Const(1));
Operand z = context.ShiftRightUI(t, Const((int)FPState.ZFlag));
z = context.BitwiseAnd(z, Const(1));
Operand n = context.ShiftRightUI(t, Const((int)FPState.NFlag));
n = context.BitwiseAnd(n, Const(1));
SetFpFlag(context, FPState.VFlag, v);
SetFpFlag(context, FPState.CFlag, c);
SetFpFlag(context, FPState.ZFlag, z);
SetFpFlag(context, FPState.NFlag, n);
context.Call(typeof(NativeInterface).GetMethod(nameof(NativeInterface.SetFpscr)), t);
}
}
}