libc cleanup (#1568)

* libc cleanup

* Suggested changes, small alloca tweak

* Remove printf include

src/libultra/libc/llcvt.c

@@ -1,33 +1,33 @@
-#include "global.h"
+// IDO Compiler Intrinsics for 64-bit conversion
 
-s64 __d_to_ll(f64 d) {
+long long __d_to_ll(double d) {
     return d;
 }
 
-s64 __f_to_ll(f32 f) {
+long long __f_to_ll(float f) {
     return f;
 }
 
-u64 __d_to_ull(f64 d) {
+unsigned long long __d_to_ull(double d) {
     return d;
 }
 
-u64 __f_to_ull(f32 f) {
+unsigned long long __f_to_ull(float f) {
     return f;
 }
 
-f64 __ll_to_d(s64 l) {
+double __ll_to_d(long long l) {
     return l;
 }
 
-f32 __ll_to_f(s64 l) {
+float __ll_to_f(long long l) {
     return l;
 }
 
-f64 __ull_to_d(u64 l) {
+double __ull_to_d(unsigned long long l) {
     return l;
 }
 
-f32 __ull_to_f(u64 l) {
+float __ull_to_f(unsigned long long l) {
     return l;
 }