1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22/* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27/* Copyright (c) 1988 AT&T */ 28/* All Rights Reserved */ 29 30 .file "ladd.s" 31 32/* 33 * Double long add routine. Ported from pdp 11/70 version 34 * with considerable effort. All supplied comments were ported. 35 * 36 * Ported from m32 version to sparc. No comments about difficulty. 37 * 38 * dl_t 39 * ladd (lop, rop) 40 * dl_t lop; 41 * dl_t rop; 42 */ 43 44#include "SYS.h" 45 46 ENTRY(ladd) 47 48 ld [%o7+8],%o4 ! Instruction at ret-addr should be a 49 cmp %o4,8 ! 'unimp 8' indicating a valid call. 50 be 1f ! if OK, go forward. 51 nop ! delay instruction. 52 jmp %o7+8 ! return 53 nop ! delay instruction. 54 551: 56 ld [%o0+0],%o2 ! fetch lop.dl_hop 57 ld [%o0+4],%o3 ! fetch lop.dl_lop 58 ld [%o1+0],%o4 ! fetch rop.dl_hop 59 ld [%o1+4],%o5 ! fetch rop.dl_lop 60 addcc %o3,%o5,%o3 ! lop.dl_lop + rop.dl_lop (set carry) 61 addxcc %o2,%o4,%o2 ! lop.dl_hop + rop.dl_hop + <carry> 62 ld [%sp+(16*4)],%o0 ! address to store result into 63 st %o2,[%o0+0] ! store result, dl_hop 64 jmp %o7+12 ! return 65 st %o3,[%o0+4] ! store result, dl_lop 66 67 SET_SIZE(ladd) 68