From 4f293f8cbec33e8edce81ad4980bd532a2464c05 Mon Sep 17 00:00:00 2001
From: merry <git@mary.rs>
Date: Sun, 22 Jan 2023 14:15:49 +0000
Subject: Arm64: Simplify TryEncodeBitMask and use for constants (#4328)

* Arm64: Simplify TryEncodeBitMask

* CodeGenerator: Use TryEncodeBitMask in GenerateConstantCopy

* Ptc: Bump version
---
 Ryujinx.Tests/Cpu/Arm64CodeGenCommonTests.cs | 46 ++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 Ryujinx.Tests/Cpu/Arm64CodeGenCommonTests.cs

(limited to 'Ryujinx.Tests/Cpu/Arm64CodeGenCommonTests.cs')

diff --git a/Ryujinx.Tests/Cpu/Arm64CodeGenCommonTests.cs b/Ryujinx.Tests/Cpu/Arm64CodeGenCommonTests.cs
new file mode 100644
index 00000000..e16361bb
--- /dev/null
+++ b/Ryujinx.Tests/Cpu/Arm64CodeGenCommonTests.cs
@@ -0,0 +1,46 @@
+using ARMeilleure.CodeGen.Arm64;
+using NUnit.Framework;
+
+namespace Ryujinx.Tests.Cpu
+{
+    public class Arm64CodeGenCommonTests
+    {
+        public struct TestCase
+        {
+            public ulong Value;
+            public bool Valid;
+            public int ImmN;
+            public int ImmS;
+            public int ImmR;
+        }
+
+        public static readonly TestCase[] TestCases =
+        {
+            new() { Value = 0, Valid = false, ImmN = 0, ImmS = 0, ImmR = 0 },
+            new() { Value = 0x970977f35f848714, Valid = false, ImmN = 0, ImmS = 0, ImmR = 0 },
+            new() { Value = 0xffffffffffffffff, Valid = false, ImmN = 0, ImmS = 0, ImmR = 0 },
+            new() { Value = 0x5555555555555555, Valid = true, ImmN = 0, ImmS = 0x3c, ImmR = 0 },
+            new() { Value = 0xaaaaaaaaaaaaaaaa, Valid = true, ImmN = 0, ImmS = 0x3c, ImmR = 1 },
+            new() { Value = 0x6666666666666666, Valid = true, ImmN = 0, ImmS = 0x39, ImmR = 3 },
+            new() { Value = 0x1c1c1c1c1c1c1c1c, Valid = true, ImmN = 0, ImmS = 0x32, ImmR = 6 },
+            new() { Value = 0x0f0f0f0f0f0f0f0f, Valid = true, ImmN = 0, ImmS = 0x33, ImmR = 0 },
+            new() { Value = 0xf1f1f1f1f1f1f1f1, Valid = true, ImmN = 0, ImmS = 0x34, ImmR = 4 },
+            new() { Value = 0xe7e7e7e7e7e7e7e7, Valid = true, ImmN = 0, ImmS = 0x35, ImmR = 3 },
+            new() { Value = 0xc001c001c001c001, Valid = true, ImmN = 0, ImmS = 0x22, ImmR = 2 },
+            new() { Value = 0x0000038000000380, Valid = true, ImmN = 0, ImmS = 0x02, ImmR = 25 },
+            new() { Value = 0xffff8fffffff8fff, Valid = true, ImmN = 0, ImmS = 0x1c, ImmR = 17 },
+            new() { Value = 0x000000000ffff800, Valid = true, ImmN = 1, ImmS = 0x10, ImmR = 53 },
+        };
+        
+        [Test]
+        public void BitImmTests([ValueSource(nameof(TestCases))] TestCase test)
+        {
+            bool valid = CodeGenCommon.TryEncodeBitMask(test.Value, out int immN, out int immS, out int immR);
+
+            Assert.That(valid, Is.EqualTo(test.Valid));
+            Assert.That(immN, Is.EqualTo(test.ImmN));
+            Assert.That(immS, Is.EqualTo(test.ImmS));
+            Assert.That(immR, Is.EqualTo(test.ImmR));
+        }
+    }
+}
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