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diff --git a/code/handmade_intrinsics.h b/code/handmade_intrinsics.h
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+++ b/code/handmade_intrinsics.h
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+/* date = May 13th 2025 1:41 pm */
+
+#ifndef HANDMADE_INTRINSICS_H
+#define HANDMADE_INTRINSICS_H
+
+//
+// TODO(casey): Remove math.h
+//
+#include <math.h>
+
+inline s32
+RoundReal32ToInt32(r32 Real32)
+{
+    s32 Result = (s32)(roundf(Real32));
+    return Result;
+}
+
+inline u32
+RoundReal32ToUInt32(r32 Real32)
+{
+    u32 Result = (u32)(roundf(Real32));
+    return Result;
+}
+
+inline u32
+TruncateReal32ToUInt32(r32 Real32)
+{
+    u32 Result = (u32)Real32;
+    return Result;
+}
+
+inline s32
+TruncateReal32ToInt32(r32 Real32)
+{
+    s32 Result = (s32)Real32;
+    return Result;
+}
+
+inline s32
+FloorReal32ToInt32(r32 Real32)
+{
+    s32 Result = (s32)floorf(Real32);
+    return Result;
+}
+
+inline r32
+Sin(r32 Angle)
+{
+    r32 Result = sinf(Angle);
+    return Result;
+}
+
+inline r32
+Cos(r32 Angle)
+{
+    r32 Result = cosf(Angle);
+    return Result;
+}
+
+inline r32
+Atan2(r32 Y, r32 X)
+{
+    r32 Result = atan2f(Y, X);
+    return Result;
+}
+
+struct bit_scan_result
+{
+    b32 Found;
+    u32 Index;
+};
+
+internal inline bit_scan_result
+FindLeastSignificantSetBit(u32 Value)
+{
+    bit_scan_result Result = {};
+    
+#if 0
+#elif COMPILER_GNU
+    Result.Index = __builtin_ffs(Value);
+    if(Result.Index)
+    {
+        Result.Found = true;
+        Result.Index--;
+    }
+#else
+    for(u32 Test = 0;
+        Test < 32;
+        Test++)
+    {
+        if(Value & (1 << Test))
+        {
+            Result.Index = Test;
+            Result.Found = true;
+            break;
+        }
+    }
+#endif
+    
+    return Result;
+}
+
+#endif //HANDMADE_INTRINSICS_H