LB3

			AREA STACK, READWRITE
stack_top 	EQU 0x20000000
			PRESERVE8
			AREA RESET, DATA, READONLY
			DCD stack_top

			AREA Prog1, CODE, READONLY
			THUMB

const_delta EQU 0xB4
const_K1	EQU 0xA0;
const_K2_1	EQU 0x80;
const_K2_2 	EQU 0x200;

			EXPORT start
			ENTRY

start
	add r13, #const_delta

	ldr r1, [r13,#4]
	ldr r2, [r13,#8]
	ldr r3, [r13,#12]

	movs r4, #const_K1
;	movs r5, #const_K2_2
	movs r5, #const_K2_1
	lsls r5, 2

	muls r4, r1, r4
	subs r2, r3
	muls r5, r2, r5
	adds r4, r5

	str r4, [r13]

	B .
	END