Import gx, PadClamp, rest of mtx, TRK 2.6 and MSL (#525)

* Match mtx and Padclamp.c

* Match the rest of GX

* Import TRK 2.6

* Import MSL headers and files

* Merge some MSL headers into ours

src/MSL_C.PPCEABI.bare.H/mem.c

@@ -0,0 +1,75 @@
+#include "string.h"
+#include "PowerPC_EABI_Support/Msl/MSL_C/MSL_Common/mem_funcs.h"
+
+void* memmove(void* dst, const void* src, size_t n)
+{
+	unsigned char* csrc;
+	unsigned char* cdst;
+
+	int reverse = (unsigned int)src < (unsigned int)dst;
+
+	if (n >= 32) {
+		if (((unsigned int)dst ^ (unsigned int)src) & 3) {
+			if (!reverse) {
+				__copy_longs_unaligned(dst, src, n);
+			} else {
+				__copy_longs_rev_unaligned(dst, src, n);
+			}
+		} else {
+			if (!reverse) {
+				__copy_longs_aligned(dst, src, n);
+			} else {
+				__copy_longs_rev_aligned(dst, src, n);
+			}
+		}
+
+		return dst;
+	} else {
+		if (!reverse) {
+			csrc = ((unsigned char*)src) - 1;
+			cdst = ((unsigned char*)dst) - 1;
+			n++;
+
+			while (--n > 0) {
+				*++cdst = *++csrc;
+			}
+		} else {
+			csrc = (unsigned char*)src + n;
+			cdst = (unsigned char*)dst + n;
+			n++;
+
+			while (--n > 0) {
+				*--cdst = *--csrc;
+			}
+		}
+	}
+
+	return dst;
+}
+
+void* memchr(const void* ptr, int ch, size_t count)
+{
+	const unsigned char* p;
+
+	unsigned long v = (ch & 0xff);
+
+	for (p = (unsigned char*)ptr - 1, count++; --count;)
+		if ((*++p & 0xff) == v)
+			return (void*)p;
+
+	return NULL;
+}
+
+int memcmp(const void* lhs, const void* rhs, size_t count)
+{
+	const unsigned char* p1;
+	const unsigned char* p2;
+
+	for (p1 = (const unsigned char*)lhs - 1, p2 = (const unsigned char*)rhs - 1,
+	    count++;
+	     --count;)
+		if (*++p1 != *++p2)
+			return ((*p1 < *p2) ? -1 : +1);
+
+	return 0;
+}