diff -urN pspsdk-2450-orig/src/gu/sceGuDepthRange.c pspsdk-2450/src/gu/sceGuDepthRange.c
--- pspsdk-2450-orig/src/gu/sceGuDepthRange.c	2009-01-09 03:15:40 +0900
+++ pspsdk-2450/src/gu/sceGuDepthRange.c	2009-10-02 09:20:53 +0900
@@ -12,9 +12,7 @@
 {
 	GuContext* context = &gu_contexts[gu_curr_context];              
 
-	unsigned int max = (unsigned int)near + (unsigned int)far;
-	int val = (int)((max >> 31) + max);
-	float z = (float)(val >> 1);
+	float z = (float)((near + far) / 2);
 
 	context->near_plane = near;
         context->far_plane = far;
diff -urN pspsdk-2450-orig/src/gu/sceGuGetMemory.c pspsdk-2450/src/gu/sceGuGetMemory.c
--- pspsdk-2450-orig/src/gu/sceGuGetMemory.c	2009-01-09 03:15:40 +0900
+++ pspsdk-2450/src/gu/sceGuGetMemory.c	2009-10-02 09:20:53 +0900
@@ -13,10 +13,8 @@
 
 void* sceGuGetMemory(int size)
 {
-	// some kind of 4-byte alignment?
-	size += 3;
-	size += ((unsigned int)(size >> 31)) >> 30;
-	size = (size >> 2) << 2;
+	// Round up to a multiple of 4 bytes
+	size = ((size+3) / 4) * 4;
 
 	unsigned int* orig_ptr = gu_list->current;
 	unsigned int* new_ptr = (unsigned int*)(((unsigned int)orig_ptr) + size + 8);