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Add Mrs & Msr (Nzcv) Inst., with Tests. (#819)

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* Add Mrs & Msr (Nzcv) Inst., with Tests.

* Don't use `NativeInterface`.
This commit is contained in:
LDj3SNuD 2019-11-14 03:08:07 +01:00 • committed by jduncanator
parent f0188bb345
commit 7c111a3567
2 changed files with 115 additions and 0 deletions
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42
ARMeilleure/Instructions/InstEmitSystem.cs
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@ -1,5 +1,6 @@
using ARMeilleure.Decoders;
using ARMeilleure.IntermediateRepresentation;
using ARMeilleure.State;
using ARMeilleure.Translation;
using System;
@ -32,6 +33,7 @@ namespace ARMeilleure.Instructions
{
case 0b11_011_0000_0000_001: dlg = new _U64(NativeInterface.GetCtrEl0); break;
case 0b11_011_0000_0000_111: dlg = new _U64(NativeInterface.GetDczidEl0); break;
case 0b11_011_0100_0010_000: EmitGetNzcv(context); return;
case 0b11_011_0100_0100_000: dlg = new _U64(NativeInterface.GetFpcr); break;
case 0b11_011_0100_0100_001: dlg = new _U64(NativeInterface.GetFpsr); break;
case 0b11_011_1101_0000_010: dlg = new _U64(NativeInterface.GetTpidrEl0); break;
@ -53,6 +55,7 @@ namespace ARMeilleure.Instructions
switch (GetPackedId(op))
{
case 0b11_011_0100_0010_000: EmitSetNzcv(context); return;
case 0b11_011_0100_0100_000: dlg = new _Void_U64(NativeInterface.SetFpcr); break;
case 0b11_011_0100_0100_001: dlg = new _Void_U64(NativeInterface.SetFpsr); break;
case 0b11_011_1101_0000_010: dlg = new _Void_U64(NativeInterface.SetTpidrEl0); break;
@ -110,5 +113,44 @@ namespace ARMeilleure.Instructions
return id;
}
private static void EmitGetNzcv(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Operand vSh = context.ShiftLeft(GetFlag(PState.VFlag), Const((int)PState.VFlag));
Operand cSh = context.ShiftLeft(GetFlag(PState.CFlag), Const((int)PState.CFlag));
Operand zSh = context.ShiftLeft(GetFlag(PState.ZFlag), Const((int)PState.ZFlag));
Operand nSh = context.ShiftLeft(GetFlag(PState.NFlag), Const((int)PState.NFlag));
Operand nzcvSh = context.BitwiseOr(context.BitwiseOr(nSh, zSh), context.BitwiseOr(cSh, vSh));
SetIntOrZR(context, op.Rt, nzcvSh);
}
private static void EmitSetNzcv(ArmEmitterContext context)
{
OpCodeSystem op = (OpCodeSystem)context.CurrOp;
Operand t = GetIntOrZR(context, op.Rt);
t = context.ConvertI64ToI32(t);
Operand v = context.ShiftRightUI(t, Const((int)PState.VFlag));
v = context.BitwiseAnd (v, Const(1));
Operand c = context.ShiftRightUI(t, Const((int)PState.CFlag));
c = context.BitwiseAnd (c, Const(1));
Operand z = context.ShiftRightUI(t, Const((int)PState.ZFlag));
z = context.BitwiseAnd (z, Const(1));
Operand n = context.ShiftRightUI(t, Const((int)PState.NFlag));
n = context.BitwiseAnd (n, Const(1));
SetFlag(context, PState.VFlag, v);
SetFlag(context, PState.CFlag, c);
SetFlag(context, PState.ZFlag, z);
SetFlag(context, PState.NFlag, n);
}
}
}