code_80106550 / llcvt.c and code_80104450 / ortho.c OK (#163)

* llcvt.c OK, added script from mm decomp to set mips3

* ortho.c OK

* added entries to functions.h

* named guNormalize.s

src/libultra_code/llcvt.c

@@ -0,0 +1,33 @@
+#include <global.h>
+
+s64 __d_to_ll(f64 d) {
+    return d;
+}
+
+s64 __f_to_ll(f32 f) {
+    return f;
+}
+
+u64 __d_to_ull(f64 d) {
+    return d;
+}
+
+u64 __f_to_ull(f32 f) {
+    return f;
+}
+
+f64 __ll_to_d(s64 l) {
+    return l;
+}
+
+f32 __ll_to_f(s64 l) {
+    return l;
+}
+
+f64 __ull_to_d(u64 l) {
+    return l;
+}
+
+f32 __ull_to_f(u64 l) {
+    return l;
+}

src/libultra_code/ortho.c

@@ -0,0 +1,30 @@
+#include <ultra64.h>
+#include <global.h>
+
+void guOrthoF(f32 mf[4][4], f32 left, f32 right, f32 bottom, f32 top, f32 near, f32 far, f32 scale) {
+    s32 i, j;
+
+    guMtxIdentF(mf);
+
+    mf[0][0] = 2 / (right - left);
+    mf[1][1] = 2 / (top - bottom);
+    mf[2][2] = -2 / (far - near);
+    mf[3][0] = -(right + left) / (right - left);
+    mf[3][1] = -(top + bottom) / (top - bottom);
+    mf[3][2] = -(far + near) / (far - near);
+    mf[3][3] = 1;
+
+    for (i = 0; i < 4; i++) {
+        for (j = 0; j < 4; j++) {
+            mf[i][j] *= scale;
+        }
+    }
+}
+
+void guOrtho(Mtx* mtx, f32 left, f32 right, f32 bottom, f32 top, f32 near, f32 far, f32 scale) {
+    MtxF_t mf;
+
+    guOrthoF(mf, left, right, bottom, top, near, far, scale);
+
+    guMtxF2L(mf, mtx);
+}