#
/*
 * VideoCore IV support library for the ACK
 * © 2013 David Given
 * This file is redistributable under the terms of the 3-clause BSD license.
 * See the file 'Copying' in the root of the distribution for the full text.
 */

#include "videocore.h"

.define	.csa
.sect .data
.csa:
	! on entry:
	!   r0 = un-fixed-up descriptor
	!   r1 = value
	add r0, gp

	ld r2, 4 (r0)            ! check lower bound
	cmp r1, r2
	mov.lo r1, r2            ! r1 = min(r1, r2)

	sub r1, r2               ! adjust value to be 0-based

	ld r2, 8 (r0)            ! check upper bound
	cmp r1, r2
	mov.hi r1, r2            ! r1 = max(r1, r2)

    add r1, #3
    ld r1, (r0, r1)          ! load destination address
    add r1, gp
    b r1                     ! ...and go