9cb57fb4bb
* Change naming convention for Ryujinx project * Change naming convention for ChocolArm64 project * Fix NaN * Remove unneeded this. from Ryujinx project * Adjust naming from new PRs * Name changes based on feedback * How did this get removed? * Rebasing fix * Change FP enum case * Remove prefix from ChocolArm64 classes - Part 1 * Remove prefix from ChocolArm64 classes - Part 2 * Fix alignment from last commit's renaming * Rename namespaces * Rename stragglers * Fix alignment * Rename OpCode class * Missed a few * Adjust alignment
65 lines
No EOL
2.2 KiB
C#
65 lines
No EOL
2.2 KiB
C#
using ChocolArm64.Decoders;
|
|
using ChocolArm64.State;
|
|
using System;
|
|
|
|
namespace ChocolArm64.Instructions32
|
|
{
|
|
static class A32InstInterpretHelper
|
|
{
|
|
public static bool IsConditionTrue(CpuThreadState state, Cond cond)
|
|
{
|
|
switch (cond)
|
|
{
|
|
case Cond.Eq: return state.Zero;
|
|
case Cond.Ne: return !state.Zero;
|
|
case Cond.GeUn: return state.Carry;
|
|
case Cond.LtUn: return !state.Carry;
|
|
case Cond.Mi: return state.Negative;
|
|
case Cond.Pl: return !state.Negative;
|
|
case Cond.Vs: return state.Overflow;
|
|
case Cond.Vc: return !state.Overflow;
|
|
case Cond.GtUn: return state.Carry && !state.Zero;
|
|
case Cond.LeUn: return !state.Carry && state.Zero;
|
|
case Cond.Ge: return state.Negative == state.Overflow;
|
|
case Cond.Lt: return state.Negative != state.Overflow;
|
|
case Cond.Gt: return state.Negative == state.Overflow && !state.Zero;
|
|
case Cond.Le: return state.Negative != state.Overflow && state.Zero;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
public unsafe static uint GetReg(CpuThreadState state, int reg)
|
|
{
|
|
if ((uint)reg > 15)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(reg));
|
|
}
|
|
|
|
fixed (uint* ptr = &state.R0)
|
|
{
|
|
return *(ptr + reg);
|
|
}
|
|
}
|
|
|
|
public unsafe static void SetReg(CpuThreadState state, int reg, uint value)
|
|
{
|
|
if ((uint)reg > 15)
|
|
{
|
|
throw new ArgumentOutOfRangeException(nameof(reg));
|
|
}
|
|
|
|
fixed (uint* ptr = &state.R0)
|
|
{
|
|
*(ptr + reg) = value;
|
|
}
|
|
}
|
|
|
|
public static uint GetPc(CpuThreadState state)
|
|
{
|
|
//Due to the old fetch-decode-execute pipeline of old ARM CPUs,
|
|
//the PC is 4 or 8 bytes (2 instructions) ahead of the current instruction.
|
|
return state.R15 + (state.Thumb ? 2U : 4U);
|
|
}
|
|
}
|
|
} |