17c478bd9Sstevel@tonic-gate/* 27c478bd9Sstevel@tonic-gate * CDDL HEADER START 37c478bd9Sstevel@tonic-gate * 47c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 59a70fc3bSMark J. Nelson * Common Development and Distribution License (the "License"). 69a70fc3bSMark J. Nelson * You may not use this file except in compliance with the License. 77c478bd9Sstevel@tonic-gate * 87c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 97c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 107c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 117c478bd9Sstevel@tonic-gate * and limitations under the License. 127c478bd9Sstevel@tonic-gate * 137c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 147c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 157c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 167c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 177c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 187c478bd9Sstevel@tonic-gate * 197c478bd9Sstevel@tonic-gate * CDDL HEADER END 207c478bd9Sstevel@tonic-gate */ 217c478bd9Sstevel@tonic-gate/* 227c478bd9Sstevel@tonic-gate * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 237c478bd9Sstevel@tonic-gate * Use is subject to license terms. 247c478bd9Sstevel@tonic-gate */ 257c478bd9Sstevel@tonic-gate 269a70fc3bSMark J. Nelson .file "_xtoull.s" 277c478bd9Sstevel@tonic-gate 287c478bd9Sstevel@tonic-gate#include <SYS.h> 297c478bd9Sstevel@tonic-gate 307c478bd9Sstevel@tonic-gate .set cw,0 317c478bd9Sstevel@tonic-gate .set cw_old,2 327c478bd9Sstevel@tonic-gate .text 337c478bd9Sstevel@tonic-gate .align 16 347c478bd9Sstevel@tonic-gatetwo_to_63: .4byte 0x5f000000 357c478bd9Sstevel@tonic-gate 367c478bd9Sstevel@tonic-gate ENTRY(__xtoull) /* 387-stack to unsigned long long */ 377c478bd9Sstevel@tonic-gate subq $16,%rsp 387c478bd9Sstevel@tonic-gate fstcw cw_old(%rsp) 397c478bd9Sstevel@tonic-gate movw cw_old(%rsp),%ax 407c478bd9Sstevel@tonic-gate movw %ax,%cx 417c478bd9Sstevel@tonic-gate andw $0x0c00,%cx /* save RC */ 427c478bd9Sstevel@tonic-gate orw $0x0c00,%ax 437c478bd9Sstevel@tonic-gate movw %ax,cw(%rsp) 447c478bd9Sstevel@tonic-gate fldcw cw(%rsp) 457c478bd9Sstevel@tonic-gate flds two_to_63(%rip) 467c478bd9Sstevel@tonic-gate fcomip %st(1),%st /* compare 2**63 to x */ 477c478bd9Sstevel@tonic-gate jp .donotsub /* jump if x is NaN */ 487c478bd9Sstevel@tonic-gate ja .donotsub /* jump if 2**63 > x */ 497c478bd9Sstevel@tonic-gate fsubs two_to_63(%rip) /* subtract 2**63 */ 507c478bd9Sstevel@tonic-gate.donotsub: 517c478bd9Sstevel@tonic-gate fistpll 8(%rsp) 527c478bd9Sstevel@tonic-gate fwait /* in case fistpll causes exception */ 537c478bd9Sstevel@tonic-gate movq 8(%rsp),%rax 547c478bd9Sstevel@tonic-gate jp .donotadd 557c478bd9Sstevel@tonic-gate ja .donotadd /* flags did not change */ 567c478bd9Sstevel@tonic-gate movq $0x8000000000000000,%rcx 577c478bd9Sstevel@tonic-gate addq %rcx,%rax /* add back 2**63 */ 587c478bd9Sstevel@tonic-gate.donotadd: 597c478bd9Sstevel@tonic-gate fstcw cw(%rsp) /* fetch CW in case masks changed */ 607c478bd9Sstevel@tonic-gate movw cw(%rsp),%dx 617c478bd9Sstevel@tonic-gate andw $0xf3ff,%dx 627c478bd9Sstevel@tonic-gate orw %cx,%dx /* restore RC */ 637c478bd9Sstevel@tonic-gate movw %dx,cw(%rsp) 647c478bd9Sstevel@tonic-gate fldcw cw(%rsp) 657c478bd9Sstevel@tonic-gate addq $16,%rsp 667c478bd9Sstevel@tonic-gate ret 677c478bd9Sstevel@tonic-gate SET_SIZE(__xtoull) 68