Initial trivial prototype of malloc. Need to figure out standard stack and heap space blocks

Library function prototypes/malloc.s

@@ -0,0 +1,37 @@
+	# We will be using R0 request a number of bytes
+	# The pointer to the block of that size is to be
+	# passed back in R0, for simplicity sake
+	# R15 will be used as the stack pointer
+:start
+	LOADUI R15 @stack
+	LOADUI R0 22				; Allocate 22 bytes
+	CALLI R15 @malloc
+	LOADUI R0 42				; Allocate 42 bytes
+	CALLI R15 @malloc
+	HALT
+
+;;  Our simple malloc function
+:malloc
+	;; Preserve registers
+	PUSHR R1 R15
+	;; Get current malloc pointer
+	LOADR R1 @malloc_pointer
+	;; Deal with special case
+	CMPSKIP.NE R1 0			; If Zero set to our start of heap space
+	LOADUI R1 0x600
+
+	;; update malloc pointer
+	SWAP R0 R1
+	ADD R1 R0 R1
+	STORER R1 @malloc_pointer
+
+;; Done
+	;; Restore registers
+	POPR R1 R15
+	RET R15
+;; Our static value for malloc pointer
+:malloc_pointer
+	NOP
+
+;; Start stack at end of instructions
+:stack