Tests: Add Fmax_S test (#23)

Ryujinx.Tests/Cpu/CpuTestScalar.cs

@@ -0,0 +1,30 @@
+using ChocolArm64.State;
+using NUnit.Framework;
+
+namespace Ryujinx.Tests.Cpu
+{
+    [TestFixture]
+    public partial class CpuTest
+    {
+        [TestCase(0x00000000u, 0x80000000u, 0x00000000u)]
+        [TestCase(0x80000000u, 0x00000000u, 0x00000000u)]
+        [TestCase(0x80000000u, 0x80000000u, 0x80000000u)]
+        [TestCase(0x3DCCCCCDu, 0x3C9623B1u, 0x3DCCCCCDu)]
+        [TestCase(0x8BA98D27u, 0x00000076u, 0x00000076u)]
+        [TestCase(0x807FFFFFu, 0x7F7FFFFFu, 0x7F7FFFFFu)]
+        [TestCase(0x7F7FFFFFu, 0x807FFFFFu, 0x7F7FFFFFu)]
+        [TestCase(0x7FC00000u, 0x3F800000u, 0x7FC00000u)]
+        [TestCase(0x3F800000u, 0x7FC00000u, 0x7FC00000u)]
+        // NaN tests
+        //[TestCase(0x7F800001u, 0x7FC00042u, 0x7FC00001u)]
+        //[TestCase(0x7FC00042u, 0x7F800001u, 0x7FC00001u)]
+        //[TestCase(0x7FC0000Au, 0x7FC0000Bu, 0x7FC0000Au)]
+        public void Fmax_S(uint A, uint B, uint Result)
+        {
+            // FMAX S0, S1, S2
+            uint Opcode = 0x1E224820;
+            AThreadState ThreadState = SingleOpcode(Opcode, V1: new AVec { W0 = A }, V2: new AVec { W0 = B });
+            Assert.AreEqual(Result, ThreadState.V0.W0);
+        }
+    }
+}