1/* $NetBSD: n_sincos.S,v 1.6 2002/07/14 19:55:24 matt Exp $ */ 2/* 3 * Copyright (c) 1985, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed by the University of 17 * California, Berkeley and its contributors. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)sincos.s 8.1 (Berkeley) 6/4/93 35 */ 36 37/* 38 * This is the implementation of Peter Tang's double precision 39 * sine and cosine for the VAX using Bob Corbett's argument reduction. 40 * 41 * Notes: 42 * under 1,024,000 random arguments testing on [0,2*pi] 43 * sin() observed maximum error = 0.814 ulps 44 * cos() observed maximum error = 0.792 ulps 45 * 46 * double sin(arg) 47 * double arg; 48 * method: true range reduction to [-pi/4,pi/4], P. Tang & B. Corbett 49 * S. McDonald, April 4, 1985 50 */ 51#include <machine/asm.h> 52 53ENTRY(sinf, 0) 54 cvtfd 4(%ap),-(sp) 55 calls $2,sin 56 cvtdf r0,r0 57 ret 58 59ENTRY(sin, 0xfc0) 60 movq 4(%ap),%r0 61 bicw3 $0x807f,%r0,%r2 62 beql 1f # if x is zero or reserved operand then return x 63/* 64 * Save the PSL's IV & FU bits on the stack. 65 */ 66 movpsl %r2 67 bicw3 $0xff9f,%r2,-(%sp) 68/* 69 * Clear the IV & FU bits. 70 */ 71 bicpsw $0x0060 72/* 73 * Entered by sine ; save 0 in %r4 . 74 */ 75 jsb _C_LABEL(__libm_argred)+2 76 movl $0,%r4 77 jsb _C_LABEL(__libm_sincos)+2 78 bispsw (%sp)+ 791: ret 80 81/* 82 * double cos(arg) 83 * double arg; 84 * method: true range reduction to [-pi/4,pi/4], P. Tang & B. Corbett 85 * S. McDonald, April 4, 1985 86 */ 87 88ENTRY(cosf, 0) 89 cvtfd 4(%ap),-(sp) 90 calls $2,cos 91 cvtdf r0,r0 92 ret 93 94ENTRY(cos, 0x0fc0) 95 movq 4(%ap),%r0 96 bicw3 $0x7f,%r0,%r2 97 cmpw $0x8000,%r2 98 beql 1f # if x is reserved operand then return x 99/* 100 * Save the PSL's IV & FU bits on the stack. 101 */ 102 movpsl %r2 103 bicw3 $0xff9f,%r2,-(%sp) 104/* 105 * Clear the IV & FU bits. 106 */ 107 bicpsw $0x0060 108/* 109 * Entered by cosine ; save 1 in %r4 . 110 */ 111 jsb _C_LABEL(__libm_argred)+2 112 movl $1,%r4 113 jsb _C_LABEL(__libm_sincos)+2 114 bispsw (%sp)+ 1151: ret 116