THIS FILE IS DAMAGED COMPILATION LISTING OF SEGMENT log_ Compiled by: Multics PL/I Compiler, Release 28d, of September 14, 1983 Compiled at: Honeywell LCPD Phoenix, System M Compiled on: 10/03/83 1404.4 mst Mon Options: optimize map 1 /* ****************************************************** 2* * * 3* * * 4* * Copyright (c) 1972 by Massachusetts Institute of * 5* * Technology and Honeywell Information Systems, Inc. * 6* * * 7* * * 8* ****************************************************** */ 9 10 /* modified by A. Downing to remove calls to round_ */ 11 12 log_: procedure (number) returns (float binary (27)); 13 14 /* compute the logarithm or hyperbolic arctangent of a single-precision floating-point number */ 15 declare (number, r) float binary (27), 16 (a, f, n, p) float binary (63), 17 i fixed binary (17); 18 dcl code_ ext entry (fixed bin), 19 (abs, addr, log, log10, log2, round, sign) builtin, 20 1 word aligned based, 21 2 exponent fixed bin (7) unal; 22 return(log(number)); /* Natural log of value. */ 23 24 long: i = addr (f) -> exponent; 25 addr (f) -> exponent = 0; 26 if f < 0.7071067811865475244e0 then lower: do; 27 a = 0.5946035575013605334e0; 28 n = 0.75e0; 29 end lower; else upper: do; 30 a = 0.840896415253714543e0; 31 n = 0.25e0; 32 end upper; 33 f = (f - a) / (f + a); 34 n = i - n; 35 short: if abs (f) < 0.7450580597e-8 then go to finis; 36 a = f*f; 37 f = (((0.2857142857142857143e0 * a + 0.4e0) * a + 0.6666666666666666667e0) * a + 2.e0) * f; 38 finis: f = (0.6931471805599453094e0 * n + f) * p; 39 r = round (f, 28); 40 return (r); 41 42 log2_: entry (number) returns (float binary (27)); 43 return(log2(number)); /* log(2) of value. */ 44 45 log10_: entry (number) returns (float binary (27)); 46 return(log10(number)); /* log(10) of value. */ 47 48 lone_: entry (number) returns (float binary (27)); 49 return(log(number+1.0e0)); /* Natural log of x+1. */ 50 51 atanh_: entry (number) returns (float binary (27)); 52 p = 0.5e0; 53 f = number; 54 a = abs (f); 55 if a < 0.1e0 then do; 56 n = 0.0e0; 57 go to short; 58 end; 59 a = a - 1.e0; 60 if a >= 0.0e0 then err2: do; 61 call code_ (sign (a) + 42); 62 if a = 0.0e0 then f = 170141182.e30 * f; else f = 0.0e0; 63 return (f); 64 end err2; 65 f = (1.e0 + f) / (1.e0 - f); 66 go to long; 67 end log_; SOURCE FILES USED IN THIS COMPILATION. LINE NUMBER DATE MODIFIED NAME PATHNAME 0 10/03/83 1005.1 log_.pl1 >spec>on>pl128d>log_.pl1 NAMES DECLARED IN THIS COMPILATION. IDENTIFIER OFFSET LOC STORAGE CLASS DATA TYPE ATTRIBUTES AND REFERENCES (* indicates a set context) NAMES DECLARED BY DECLARE STATEMENT. a 000102 automatic float bin(63) dcl 15 set ref 27* 30* 33 33 36* 37 37 37 54* 55 59* 59 60 61 62 abs builtin function dcl 18 ref 35 54 addr builtin function dcl 18 ref 24 25 code_ 000010 constant entry external dcl 18 ref 61 exponent based fixed bin(7,O+6x hLS_%iQ&MR12.5 QHo gdKZK6h-$Qp`K6SNuWa[k8(Q&mO#ldKZLj/4)paLSug]Rk8Q-\.O$0C!#0 Η W-.}mx |f+;_M=?y ? 3-_G {0}M/,%z] z@. Q-mQr4svC3'IA"}}6W&o! %ooZ,24b; #  @eOr,X(@?#?#QGàà P1ZQ-_Q-_Q-gQ-jBV#jXB# B#@0ɠ*'#LpB#@~VB[? r9iGj@e~"O+x hLS_%iQ4ŶMR12.5 QHo gStdK}M-l~0plMShud;k8~Q4zOIo0d W-.}; g+;_?ҁ=L ? 3-_G {0}M^,%z] z. | |Q4rC4C3'IA"}}6W&o! %!>},Άrb 36 000117 37 000122 38 000132 39 000137 40 000142 42 000145 43 000154 45 000163 46 000172 48 000201 49 000210 51 000220 52 000227 53 000231 54 000234 55 000237 56 000242 57 000244 59 000245 60 000250 61 000251 62 000263 62 000271 63 000273 65 000276 66 000305 ----------------------------------------------------------- Historical Background This edition of the Multics software materials and documentation is provided and donated to Massachusetts Institute of Technology by Group BULL including BULL HN Information Systems Inc. as a contribution to computer science knowledge. This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology, Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell BULL Inc., Groupe BULL and BULL HN Information Systems Inc. to the development of this operating system. Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970), renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture for managing computer hardware properly and for executing programs. Many subsequent operating systems incorporated Multics principles. Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. . ----------------------------------------------------------- Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without fee is hereby granted,provided that the below copyright notice and historical background appear in all copies and that both the copyright notice and historical background and this permission notice appear in supporting documentation, and that the names of MIT, HIS, BULL or BULL HN not be used in advertising or publicity pertaining to distribution of the programs without specific prior written permission. Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc. Copyright 2006 by BULL HN Information Systems Inc. Copyright 2006 by Bull SAS All Rights Reserved