Subversion Repositories HelenOS

/********************************************************************************************/

	.auto

	cover			/*Allocate zerro size frame (Step 1(from Intel Docs))*/

	add r31 = STACK_SCRATCH_AREA_SIZE, r12;;

	mov r28 = ar.bspstore   /*Calculate loadrs (step 2)*/

	ld8 r29 = [r31], +8     

	sub r27 = r29 , r28

	shl r27 = r27, 16

	mov r24 = ar.rsc

	and r30 = ~3, r24

	or  r24 = r30 , r27     

	mov ar.rsc = r24	/* place RSE in enforced lazy mode */

	loadrs 			/*(Step 3)*/

				/*Read saved registers*/

	ld8 r28 = [r31], +8     /*ar.bspstore*/

	ld8 r27 = [r31], +8 	/*ar.rnat*/

	ld8 r26 = [r31], +8 	/*cr.ifs*/

	ld8 r25 = [r31], +8 	/*ar.pfs*/

	ld8 r24 = [r31], +8 	/*ar.rsc*/

	mov ar.bspstore = r28	/*(Step 4)*/

	mov ar.rnat = r27	/*(Step 5)*/

	mov ar.pfs = r25	/*(Step 6)*/

	mov cr.ifs = r26	

	mov ar.rsc = r24	/*(Step 7)*/

	.explicit	

/********************************************************************************************/

	ld8 r28 = [r31] , +8 ;;	/* load cr.ifa */		

	ld8 r27 = [r31] , +8 ;;	/* load cr.isr */

	ld8 r26 = [r31] , +8 ;;	/* load cr.iipa */

	ld8 r25 = [r31] , +8 ;;	/* load cr.ipsr */

	ld8 r24 = [r31] , +8 ;;	/* load cr.iip */

	mov cr.iip = r24

	mov cr.ipsr = r25

	mov cr.iipa = r26

	mov cr.isr = r27

	mov cr.ifa = r28

	ld8 r29 = [r31] , -8 ;;	/* load predicate registers */

	mov pr =r29 ;;

	add r12 = STACK_FRAME_SIZE,r12;;

    /* 19. return from interruption */

	rfi;;