From cee712105850ac3385cd0091a923438167433f9f Mon Sep 17 00:00:00 2001
From: TSR Berry <20988865+TSRBerry@users.noreply.github.com>
Date: Sat, 8 Apr 2023 01:22:00 +0200
Subject: Move solution and projects to src

---
 .../Tamper/CodeEmitters/LoadRegisterWithMemory.cs  | 58 ++++++++++++++++++++++
 1 file changed, 58 insertions(+)
 create mode 100644 src/Ryujinx.HLE/HOS/Tamper/CodeEmitters/LoadRegisterWithMemory.cs

(limited to 'src/Ryujinx.HLE/HOS/Tamper/CodeEmitters/LoadRegisterWithMemory.cs')

diff --git a/src/Ryujinx.HLE/HOS/Tamper/CodeEmitters/LoadRegisterWithMemory.cs b/src/Ryujinx.HLE/HOS/Tamper/CodeEmitters/LoadRegisterWithMemory.cs
new file mode 100644
index 00000000..87b37a1e
--- /dev/null
+++ b/src/Ryujinx.HLE/HOS/Tamper/CodeEmitters/LoadRegisterWithMemory.cs
@@ -0,0 +1,58 @@
+using Ryujinx.HLE.Exceptions;
+
+namespace Ryujinx.HLE.HOS.Tamper.CodeEmitters
+{
+    /// <summary>
+    /// Code type 5 allows loading a value from memory into a register, either using a fixed address or by
+    /// dereferencing the destination register.
+    /// </summary>
+    class LoadRegisterWithMemory
+    {
+        private const int OperationWidthIndex = 1;
+        private const int MemoryRegionIndex = 2;
+        private const int DestinationRegisterIndex = 3;
+        private const int UseDestinationAsSourceIndex = 4;
+        private const int OffsetImmediateIndex = 6;
+
+        private const int OffsetImmediateSize = 10;
+
+        public static void Emit(byte[] instruction, CompilationContext context)
+        {
+            // 5TMR00AA AAAAAAAA
+            // T: Width of memory read (1, 2, 4, or 8 bytes).
+            // M: Memory region to write to (0 = Main NSO, 1 = Heap).
+            // R: Register to load value into.
+            // A: Immediate offset to use from memory region base.
+
+            // 5TMR10AA AAAAAAAA
+            // T: Width of memory read(1, 2, 4, or 8 bytes).
+            // M: Ignored.
+            // R: Register to use as base address and to load value into.
+            // A: Immediate offset to use from register R.
+
+            byte operationWidth = instruction[OperationWidthIndex];
+            MemoryRegion memoryRegion = (MemoryRegion)instruction[MemoryRegionIndex];
+            Register destinationRegister = context.GetRegister(instruction[DestinationRegisterIndex]);
+            byte useDestinationAsSourceIndex = instruction[UseDestinationAsSourceIndex];
+            ulong address = InstructionHelper.GetImmediate(instruction, OffsetImmediateIndex, OffsetImmediateSize);
+
+            Pointer sourceMemory;
+
+            switch (useDestinationAsSourceIndex)
+            {
+                case 0:
+                    // Don't use the source register as an additional address offset.
+                    sourceMemory = MemoryHelper.EmitPointer(memoryRegion, address, context);
+                    break;
+                case 1:
+                    // Use the source register as the base address.
+                    sourceMemory = MemoryHelper.EmitPointer(destinationRegister, address, context);
+                    break;
+                default:
+                    throw new TamperCompilationException($"Invalid source mode {useDestinationAsSourceIndex} in Atmosphere cheat");
+            }
+
+            InstructionHelper.EmitMov(operationWidth, context, destinationRegister, sourceMemory);
+        }
+    }
+}
-- 
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