1*5d9d9091SRichard Lowe/* 2*5d9d9091SRichard Lowe * CDDL HEADER START 3*5d9d9091SRichard Lowe * 4*5d9d9091SRichard Lowe * The contents of this file are subject to the terms of the 5*5d9d9091SRichard Lowe * Common Development and Distribution License (the "License"). 6*5d9d9091SRichard Lowe * You may not use this file except in compliance with the License. 7*5d9d9091SRichard Lowe * 8*5d9d9091SRichard Lowe * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*5d9d9091SRichard Lowe * or http://www.opensolaris.org/os/licensing. 10*5d9d9091SRichard Lowe * See the License for the specific language governing permissions 11*5d9d9091SRichard Lowe * and limitations under the License. 12*5d9d9091SRichard Lowe * 13*5d9d9091SRichard Lowe * When distributing Covered Code, include this CDDL HEADER in each 14*5d9d9091SRichard Lowe * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*5d9d9091SRichard Lowe * If applicable, add the following below this CDDL HEADER, with the 16*5d9d9091SRichard Lowe * fields enclosed by brackets "[]" replaced with your own identifying 17*5d9d9091SRichard Lowe * information: Portions Copyright [yyyy] [name of copyright owner] 18*5d9d9091SRichard Lowe * 19*5d9d9091SRichard Lowe * CDDL HEADER END 20*5d9d9091SRichard Lowe */ 21*5d9d9091SRichard Lowe/* 22*5d9d9091SRichard Lowe * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23*5d9d9091SRichard Lowe */ 24*5d9d9091SRichard Lowe/* 25*5d9d9091SRichard Lowe * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 26*5d9d9091SRichard Lowe * Use is subject to license terms. 27*5d9d9091SRichard Lowe */ 28*5d9d9091SRichard Lowe 29*5d9d9091SRichard Lowe .file "remquo.s" 30*5d9d9091SRichard Lowe 31*5d9d9091SRichard Lowe#include "libm.h" 32*5d9d9091SRichard LoweLIBM_ANSI_PRAGMA_WEAK(remquo,function) 33*5d9d9091SRichard Lowe#include "libm_protos.h" 34*5d9d9091SRichard Lowe 35*5d9d9091SRichard Lowe ENTRY(remquo) 36*5d9d9091SRichard Lowe fldl 12(%esp) / load arg y 37*5d9d9091SRichard Lowe fldl 4(%esp) / load arg x 38*5d9d9091SRichard Lowe.Lrem_loop: 39*5d9d9091SRichard Lowe fprem1 / partial remainder 40*5d9d9091SRichard Lowe fstsw %ax / store status word 41*5d9d9091SRichard Lowe andw $0x400,%ax / check whether reduction complete 42*5d9d9091SRichard Lowe jne .Lrem_loop / while reduction incomplete, do fprem1 43*5d9d9091SRichard Lowe fstsw %ax 44*5d9d9091SRichard Lowe fwait 45*5d9d9091SRichard Lowe fstp %st(1) 46*5d9d9091SRichard Lowe movw %ax,%dx 47*5d9d9091SRichard Lowe andw $0x4000,%dx / get C3 48*5d9d9091SRichard Lowe sarw $13,%dx 49*5d9d9091SRichard Lowe movw %ax,%cx 50*5d9d9091SRichard Lowe andw $0x100,%cx / get C0 51*5d9d9091SRichard Lowe sarw $6,%cx 52*5d9d9091SRichard Lowe addw %cx,%dx 53*5d9d9091SRichard Lowe andw $0x200,%ax / get C1 54*5d9d9091SRichard Lowe sarw $9,%ax 55*5d9d9091SRichard Lowe addw %dx,%ax 56*5d9d9091SRichard Lowe cwtl 57*5d9d9091SRichard Lowe movl 8(%esp),%edx / sign and bexp of x 58*5d9d9091SRichard Lowe movl 16(%esp),%ecx / sign and bexp of y 59*5d9d9091SRichard Lowe andl $0x80000000,%edx / edx <- sign(x) 60*5d9d9091SRichard Lowe andl $0x80000000,%ecx / ecx <- sign(y) 61*5d9d9091SRichard Lowe cmpl %edx,%ecx 62*5d9d9091SRichard Lowe je .pos 63*5d9d9091SRichard Lowe negl %eax / negative n 64*5d9d9091SRichard Lowe.pos: 65*5d9d9091SRichard Lowe movl 20(%esp),%ecx 66*5d9d9091SRichard Lowe movl %eax,0(%ecx) / last 3 significant bits of quotient 67*5d9d9091SRichard Lowe ret 68*5d9d9091SRichard Lowe .align 4 69*5d9d9091SRichard Lowe SET_SIZE(remquo) 70