xref: /illumos-gate/usr/src/cmd/eqn/sqrt.c (revision 9b9d39d2a32ff806d2431dbcc50968ef1e6d46b2)
1 /*
2  * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
3  * Use is subject to license terms.
4  */
5 
6 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
7 /*	  All Rights Reserved  	*/
8 
9 /*
10  * Copyright (c) 1980 Regents of the University of California.
11  * All rights reserved. The Berkeley software License Agreement
12  * specifies the terms and conditions for redistribution.
13  */
14 
15 #include "e.h"
16 
17 void
18 sqrt(int p2)
19 {
20 #ifndef NEQN
21 	int nps;
22 
23 	nps = EFFPS(((eht[p2]*9)/10+(resolution/POINT-1))/(resolution/POINT));
24 #endif	/* NEQN */
25 	yyval = p2;
26 #ifndef NEQN
27 	eht[yyval] = VERT(EM(1.2, nps));
28 	if (dbg)
29 		printf(".\tsqrt: S%d <- S%d;b=%d, h=%d\n",
30 		    yyval, p2, ebase[yyval], eht[yyval]);
31 	if (rfont[yyval] == ITAL)
32 		printf(".as %d \\|\n", yyval);
33 #endif	/* NEQN */
34 	nrwid(p2, ps, p2);
35 #ifndef NEQN
36 	printf(".ds %d \\v'%du'\\s%d\\v'-.2m'\\(sr\\l'\\n(%du\\"
37 	    "(rn'\\v'.2m'\\s%d", yyval, ebase[p2], nps, p2, ps);
38 	printf("\\v'%du'\\h'-\\n(%du'\\*(%d\n", -ebase[p2], p2, p2);
39 	lfont[yyval] = ROM;
40 #else	/* NEQN */
41 	printf(".ds %d \\v'%du'\\e\\L'%du'\\l'\\n(%du'",
42 	    p2, ebase[p2], -eht[p2], p2);
43 	printf("\\v'%du'\\h'-\\n(%du'\\*(%d\n", eht[p2]-ebase[p2], p2, p2);
44 	eht[p2] += VERT(1);
45 	if (dbg)
46 		printf(".\tsqrt: S%d <- S%d;b=%d, h=%d\n",
47 		    p2, p2, ebase[p2], eht[p2]);
48 #endif	/* NEQN */
49 }
50