osspsetpc OK (#384)

src/libultra/io/spsetpc.c

@@ -1,3 +1,13 @@
 #include "global.h"
 
-#pragma GLOBAL_ASM("asm/non_matchings/boot/spsetpc/__osSpSetPc.s")
+s32 __osSpSetPc(void* pc) {
+    register u32 spStatus = HW_REG(SP_STATUS_REG, u32);
+
+    if (!(spStatus & SP_STATUS_HALT)) {
+        return -1;
+    } else {
+        HW_REG(SP_PC_REG, void*) = pc;
+    }
+
+    return 0;
+}