/*- * Copyright (c) 1985 The Regents of the University of California. * All rights reserved. * * This code is derived from software contributed to Berkeley by * Computer Consoles Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)Kfrexpf.s 7.1 (Berkeley) 12/6/90 */ #include "../tahoe/SYS.h" .text ENTRY(Kfrexpf, 0) subl3 $60,fp,sp clrl -60(fp) # j=0; clrl -56(fp) # neg=0; tstl 4(fp) # if(x<0){ jgeq 1f lnd 4(fp) std 4(fp) # x = -x; movl $1,-56(fp) # neg=1;} 1: cmpd2 4(fp),one # if (x>1){ jleq 1f 2: cmpd2 4(fp),one # while(x>1){ jleq 3f addl2 $1,-60(fp) # j=j+1; pushl 16(fp) # hfs ldd two pushd ldd 4(fp) pushd callf $24,_Kdivd ldd r0 std 4(fp) # x= x/2; jbr 2b 1: cmpd2 4(fp),half # if(x<0.5){ jlss 2f jbr 3f 0: subl2 $1,-60(fp) # j = j-1; pushl 16(fp) # hfs ldd 4(fp) pushd ldd two pushd callf $24,_Kmuld ldd r0 std 4(fp) # x = 2*x; 2: cmpd2 4(fp),half # while (x<0.5){ jlss 0b 3: movl -60(fp),*12(fp) # *i=j; tstl -56(fp) # if (neg) jeql 1f lnd 4(fp) std 4(fp) 1: ldd 4(fp) cvdf stf r0 ret .data .align 2 one: .long 0x40800000, 0x00000000 # .double 1 two: .long 0x41000000, 0x00000000 # .double 2 half: .long 0x40000000, 0x00000000 # .double .5