Decompile code_801067F0, 80106860, 801068B0 (#89)

* Decompile code_801067F0, 80106860, 801068B0

* clang format

* Remove unnecessary casts

src/code/code_801067F0.c

@@ -0,0 +1,13 @@
+#include <ultra64.h>
+#include <global.h>
+
+// fmodf? unused
+f32 func_801067F0(f32 arg0, f32 arg1) {
+    s32 sp4;
+
+    if (arg1 == 0.0f) {
+        return 0.0f;
+    }
+    sp4 = arg0 / arg1;
+    return arg0 - (sp4 * arg1);
+}

src/code/code_80106860.c

@@ -0,0 +1,13 @@
+#include <ultra64.h>
+#include <global.h>
+
+// memset used in __osMalloc, z_quake, z_view, and z_camera
+void* func_80106860(void* ptr, s32 val, size_t size) {
+    u8* sp4 = ptr;
+    register s32 a3;
+
+    for (a3 = size--; a3 != 0; a3 = size--) {
+        *sp4++ = val;
+    }
+    return ptr;
+}

src/code/code_801068B0.c

@@ -0,0 +1,28 @@
+#include <ultra64.h>
+#include <global.h>
+
+// memcpy used in __osMalloc.c
+void* func_801068B0(void* dst, void* src, size_t size) {
+    u8* spC;
+    u8* sp8;
+    register s32 a3;
+
+    spC = dst;
+    sp8 = src;
+
+    if (spC == sp8) {
+        return dst;
+    }
+    if (spC < sp8) {
+        for (a3 = size--; a3 != 0; a3 = size--) {
+            *spC++ = *sp8++;
+        }
+    } else {
+        spC += size - 1;
+        sp8 += size - 1;
+        for (a3 = size--; a3 != 0; a3 = size--) {
+            *spC-- = *sp8--;
+        }
+    }
+    return dst;
+}