3 files changed, 23 insertions, 0 deletions
diff --git a/arm9/lib/include/MSL.h b/arm9/lib/include/MSL.h
new file mode 100644
index 00000000..a1709bc4
--- /dev/null
+++ b/arm9/lib/include/MSL.h
@@ -0,0 +1,8 @@
+#ifndef MSL_H
+#define MSL_H
+
+//include all msl files here
+
+#include "MSL_Common_arith.h"
+
+#endif //MSL_H
diff --git a/arm9/lib/include/MSL_Common_arith.h b/arm9/lib/include/MSL_Common_arith.h
new file mode 100644
index 00000000..3ec6bdbc
--- /dev/null
+++ b/arm9/lib/include/MSL_Common_arith.h
@@ -0,0 +1,8 @@
+#ifndef MSL_COMMON_ARITH_H
+#define MSL_COMMON_ARITH_H
+
+#include "nitro/types.h"
+
+s32 abs(s32 val);
+
+#endif //MSL_COMMON_ARITH_H
diff --git a/arm9/lib/src/MSL_Common_arith.c b/arm9/lib/src/MSL_Common_arith.c
new file mode 100644
index 00000000..d4a2e834
--- /dev/null
+++ b/arm9/lib/src/MSL_Common_arith.c
@@ -0,0 +1,7 @@
+#include "MSL_Common_arith.h"
+#include "function_target.h"
+
+ARM_FUNC s32 abs(s32 val)
+{
+    return val < 0 ? -val : val;
+}