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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* Copyright (c) 1988 AT&T */ 23/* All Rights Reserved */ 24 25 26/* Copyright (c) 1989 by Sun Microsystems, Inc. */ 27 28.ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.1 */ 29 30/* 31 * Double long add routine. Ported from pdp 11/70 version 32 * with considerable effort. All supplied comments were ported. 33 * 34 * Ported from m32 version to sparc. No comments about difficulty. 35 * 36 * dl_t 37 * ladd (lop, rop) 38 * dl_t lop; 39 * dl_t rop; 40 */ 41 42 .file "ladd.s" 43 44#include <sys/asm_linkage.h> 45 46 ANSI_PRAGMA_WEAK(ladd,function) 47 48#include "synonyms.h" 49 50 ENTRY(ladd) 51 52 ld [%o7+8],%o4 ! Instruction at ret-addr should be a 53 cmp %o4,8 ! 'unimp 8' indicating a valid call. 54 be 1f ! if OK, go forward. 55 nop ! delay instruction. 56 jmp %o7+8 ! return 57 nop ! delay instruction. 58 591: 60 ld [%o0+0],%o2 ! fetch lop.dl_hop 61 ld [%o0+4],%o3 ! fetch lop.dl_lop 62 ld [%o1+0],%o4 ! fetch rop.dl_hop 63 ld [%o1+4],%o5 ! fetch rop.dl_lop 64 addcc %o3,%o5,%o3 ! lop.dl_lop + rop.dl_lop (set carry) 65 addxcc %o2,%o4,%o2 ! lop.dl_hop + rop.dl_hop + <carry> 66 ld [%sp+(16*4)],%o0 ! address to store result into 67 st %o2,[%o0+0] ! store result, dl_hop 68 jmp %o7+12 ! return 69 st %o3,[%o0+4] ! store result, dl_lop 70 71 SET_SIZE(ladd) 72