Rename Smilebit library to MUSASHI

Strings in the .rdata portion of the Smilebit in-house library code
suggest that this was its name, with its contents having names beginning
with an M (whence MMATRIX, for example).

decompile/src/MUSASHI/MMatrix.cpp

@@ -0,0 +1,66 @@
+/* JSRF Decompilation: Smilebit/MMatrix.cpp
+Smilebit's stack-based matrix math library.
+*/
+
+#pragma code_seg("MMATRIX")
+#pragma bss_seg (".data"  )
+
+
+#include "../XDK/CRT/stddef.h"
+#include "../XDK/Win32.h"
+#include "MMatrix.hpp"
+
+
+// Address: 0x00264C04
+Mat4 * * g_matricesHead;
+
+// Address: 0x00264C08
+Mat4 * g_matrices[3];
+
+
+// Address: 0x001BB690
+// Status: matching
+HRESULT __stdcall initMatrices(unsigned const count) {
+/* Initialize the matrix stack with the given number of matrices.
+The requested number of matrices is rounded up to the nearest multiple of two.
+The initialized matrices are accessible through g_matrices.
+*/
+	// Allocate matrices
+	unsigned     i    = (count + 1) & 0xFFFFFFFE; // Round up
+	Mat4 * const mats = (Mat4 *)VirtualAlloc(
+		NULL,
+		(i + 2) * sizeof *mats,
+		MEM_COMMIT|MEM_RESERVE,
+		PAGE_READWRITE
+	);
+	if (mats != NULL) {
+		Mat4 * mat = mats + 2;
+
+		// Initialize each matrix to identity
+		if (i > 0) for (; i > 0; i--) {
+			float * entry = (float *)mat;
+
+			for (unsigned j = 0; j < sizeof *mat/sizeof *entry; j++) {
+				*entry  = 0;
+				entry  += 1;
+			}
+
+			(*mat)[3].w = 1;
+			(*mat)[2].z = 1;
+			(*mat)[1].y = 1;
+			(*mat)[0].x = 1;
+			mat++;
+		}
+
+		// Assign to g_matrices for later access
+		mat            = mats + 2;
+		g_matrices[1]  = mats;
+		g_matrices[2]  = mat;
+		g_matrices[0]  = mats;
+		g_matricesHead = g_matrices + 2;
+
+		return ERROR_SUCCESS;
+	}
+
+	return E_OUTOFMEMORY;
+}

decompile/src/MUSASHI/MMatrix.hpp

@@ -0,0 +1,14 @@
+/* JSRF Decompilation: Smilebit/MMatrix.hpp
+Smilebit's stack-based matrix math library.
+*/
+
+#ifndef MMATRIX_HPP
+#define MMATRIX_HPP
+
+#include "../XDK/D3D.h"
+
+
+// 4x4 matrix type
+typedef D3DVECTOR4 Mat4[4];
+
+#endif