1*0Sstevel@tonic-gate/* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate/* Copyright (c) 1988 AT&T */ 23*0Sstevel@tonic-gate/* All Rights Reserved */ 24*0Sstevel@tonic-gate 25*0Sstevel@tonic-gate 26*0Sstevel@tonic-gate/* Copyright (c) 1989 by Sun Microsystems, Inc. */ 27*0Sstevel@tonic-gate 28*0Sstevel@tonic-gate.ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.1 */ 29*0Sstevel@tonic-gate 30*0Sstevel@tonic-gate/* 31*0Sstevel@tonic-gate * Shift a double long value. Ported from m32 version to sparc. 32*0Sstevel@tonic-gate * 33*0Sstevel@tonic-gate * dl_t 34*0Sstevel@tonic-gate * lshiftl (op, cnt) 35*0Sstevel@tonic-gate * dl_t op; 36*0Sstevel@tonic-gate * int cnt; 37*0Sstevel@tonic-gate */ 38*0Sstevel@tonic-gate 39*0Sstevel@tonic-gate .file "lshiftl.s" 40*0Sstevel@tonic-gate 41*0Sstevel@tonic-gate#include <sys/asm_linkage.h> 42*0Sstevel@tonic-gate 43*0Sstevel@tonic-gate ANSI_PRAGMA_WEAK(lshiftl,function) 44*0Sstevel@tonic-gate 45*0Sstevel@tonic-gate#include "synonyms.h" 46*0Sstevel@tonic-gate 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate ENTRY(lshiftl) 49*0Sstevel@tonic-gate 50*0Sstevel@tonic-gate ld [%o7+8],%o4 ! Instruction at ret-addr should be a 51*0Sstevel@tonic-gate cmp %o4,8 ! 'unimp 8' indicating a valid call. 52*0Sstevel@tonic-gate be 1f ! if OK, go forward. 53*0Sstevel@tonic-gate nop ! delay instruction. 54*0Sstevel@tonic-gate jmp %o7+8 ! return 55*0Sstevel@tonic-gate nop ! delay instruction. 56*0Sstevel@tonic-gate 57*0Sstevel@tonic-gate1: 58*0Sstevel@tonic-gate ld [%o0+0],%o2 ! fetch op.dl_hop 59*0Sstevel@tonic-gate ld [%o0+4],%o3 ! fetch op.dl_lop 60*0Sstevel@tonic-gate subcc %g0,%o1,%o4 ! test cnt < 0 and save reciprocol 61*0Sstevel@tonic-gate bz .done 62*0Sstevel@tonic-gate ld [%sp+(16*4)],%o0 ! address to store result into 63*0Sstevel@tonic-gate bg .right ! 64*0Sstevel@tonic-gate nop 65*0Sstevel@tonic-gate ! Positive (or null) shift (left) 66*0Sstevel@tonic-gate and %o1,0x3f,%o1 ! Reduce range to 0..63 67*0Sstevel@tonic-gate subcc %o1,32,%o5 ! cnt - 32 (also test cnt >= 32) 68*0Sstevel@tonic-gate bneg,a .leftsmall ! 69*0Sstevel@tonic-gate add %o4,32,%o4 ! 32 - cnt (actually ((-cnt) + 32) 70*0Sstevel@tonic-gate sll %o3,%o5,%o2 ! R.h = R.l << (cnt - 32) 71*0Sstevel@tonic-gate ba .done ! 72*0Sstevel@tonic-gate or %g0,%g0,%o3 ! R.l = 0 73*0Sstevel@tonic-gate 74*0Sstevel@tonic-gate.leftsmall: 75*0Sstevel@tonic-gate srl %o3,%o4,%o5 ! temp = R.l >> (31 - cnt) 76*0Sstevel@tonic-gate sll %o3,%o1,%o3 ! R.l = R.l << cnt 77*0Sstevel@tonic-gate sll %o2,%o1,%o2 ! R.h = R.h << cnt 78*0Sstevel@tonic-gate ba .done ! 79*0Sstevel@tonic-gate or %o2,%o5,%o2 ! R.h = R.h | temp 80*0Sstevel@tonic-gate 81*0Sstevel@tonic-gate.right: ! Negative shift (right) 82*0Sstevel@tonic-gate and %o4,0x3f,%o4 ! Reduce range to 0..63 83*0Sstevel@tonic-gate subcc %o4,32,%o5 ! cnt - 32 (also test cnt >= 32) 84*0Sstevel@tonic-gate bneg,a .rightsmall ! 85*0Sstevel@tonic-gate add %o1,32,%o1 ! 32 - cnt (actually ((-cnt) + 32) 86*0Sstevel@tonic-gate srl %o2,%o5,%o3 ! R.l = R.h >> (cnt - 32) 87*0Sstevel@tonic-gate ba .done ! 88*0Sstevel@tonic-gate or %g0,%g0,%o2 ! R.h = 0 89*0Sstevel@tonic-gate 90*0Sstevel@tonic-gate.rightsmall: 91*0Sstevel@tonic-gate sll %o2,%o1,%o5 ! temp = R.h << (31 - cnt) 92*0Sstevel@tonic-gate srl %o3,%o4,%o3 ! R.l = R.l >> cnt 93*0Sstevel@tonic-gate srl %o2,%o4,%o2 ! R.h = R.h >> cnt 94*0Sstevel@tonic-gate ba .done ! 95*0Sstevel@tonic-gate or %o3,%o5,%o3 ! R.l = R.l | temp 96*0Sstevel@tonic-gate 97*0Sstevel@tonic-gate.done: 98*0Sstevel@tonic-gate st %o2,[%o0+0] ! store result, dl_hop 99*0Sstevel@tonic-gate jmp %o7+12 ! return 100*0Sstevel@tonic-gate st %o3,[%o0+4] ! store result, dl_lop 101*0Sstevel@tonic-gate 102*0Sstevel@tonic-gate SET_SIZE(lshiftl) 103