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 * Copyright 2011 Nexenta Systems, Inc. All rights reserved. 23 */ 24/* 25 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 .file "finitel.s" 30 31#include "libm.h" 32 33 ENTRY(finitel) 34 movl 12(%esp),%eax / %ax <-- sign&bexp(x) 35 testl $0x80000000,8(%esp) / ZF = 1 iff hi_32(sgnfcnd(x))'s msb = 0 36 jz .chk_denormal_or_0 37 notl %eax / not(bexp) = 0 iff bexp = all 1's 38 andl $0x00007fff,%eax / ZF <-- 1 iff not(bexp) = 0 39 jz .done / no jump if arg. is finite 40 movl $1,%eax / ansi needs %eax = 1 41.done: 42 ret 43 44.chk_denormal_or_0: 45 andl $0x00007fff,%eax / ZF <-- 1 iff bexp = 0 iff denormal or 0 46 jnz .unsupported / jump if arg has unsupported format 47 movl $1,%eax / ansi needs %eax = 1 48 ret 49 50.unsupported: 51 movl $0,%eax / unsupported format does not represent 52 ret / a finite number 53 .align 4 54 SET_SIZE(finitel) 55