problem code

ddhook_applypatch:
//Format:
//rrrrrrrr Tsssssss dddddddd ...
//r = RAM address, T = Type, s = Size in bytes (aligned to 4), d = Data (size)
//repeat until r = 0
//T = 0, then copy (rrrrrrrr 0sssssss dddddddd ...)
//T = 1, then fill (rrrrrrrr 1sssssss 000000dd)

	addiu sp,sp,-0x20
	sw ra,0x20(sp)

	addiu s0,0,0

	li at,DDHOOK_PATCH
	sw at,0x1C(sp)
	sw s0,0x18(sp)
    -;
	li v0,ddhook_printf_copy_out_set
	li a3,ddhook_string_temp
	sw a3,0(v0)

	addiu a3,sp,0x18
	n64dd_dprintf_num(ddhook_string_text)

	li a1,ddhook_string_temp
	li a2,(ddhook_end - ddhook_string_temp)
	jal ddhook00_printf_out
	nop

	lw s0,0x18(sp)
	addiu s0,s0,1
	sw s0,0x18(sp)

	lw at,0x1C(sp)
	lw a0,0(at)		//Get Dest
	nop
	beq a0,0,++			//If 0 then done
	nop
	lw a2,4(at)			//Get Size
	addiu a1,at,8		//Get Source
	//Check type
	sra v0,a2,28
	bne v0,0,+
	nop

	//Type 0: Copy
	addu at,a1,a2		//Prepare at for next patch
	sw at,0x1C(sp)
	n64dd_CallRamCopy()	//Patch
	b -					//Loop
	nop

	//Type 1: Fill
	+; li a3,0x0FFFFFFF
	and a2,a2,a3
	addiu at,a1,4		//Prepare at for next patch
	lw a1,0(a1)
	sw at,0x1C(sp)
	n64dd_CallRamFill()	//Patch
	b -
	nop

	+;
	lw ra,0x20(sp)
	addiu sp,sp,0x20
	jr ra
	nop