1/****************************************************************
2
3The author of this software is David M. Gay.
4
5Copyright (C) 1998, 2000 by Lucent Technologies
6All Rights Reserved
7
8Permission to use, copy, modify, and distribute this software and
9its documentation for any purpose and without fee is hereby
10granted, provided that the above copyright notice appear in all
11copies and that both that the copyright notice and this
12permission notice and warranty disclaimer appear in supporting
13documentation, and that the name of Lucent or any of its entities
14not be used in advertising or publicity pertaining to
15distribution of the software without specific, written prior
16permission.
17
18LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
20IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
21SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
22WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
23IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
24ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
25THIS SOFTWARE.
26
27****************************************************************/
28
29/* Please send bug reports to David M. Gay (dmg at acm dot org,
30 * with " at " changed at "@" and " dot " changed to ".").	*/
31
32#include "gdtoaimp.h"
33
34#undef _0
35#undef _1
36
37/* one or the other of IEEE_MC68k or IEEE_8087 should be #defined */
38
39#ifdef IEEE_MC68k
40#define _0 0
41#define _1 1
42#define _2 2
43#define _3 3
44#endif
45#ifdef IEEE_8087
46#define _0 3
47#define _1 2
48#define _2 1
49#define _3 0
50#endif
51
52 void
53#ifdef KR_headers
54ULtoQ(L, bits, exp, k) ULong *L; ULong *bits; Long exp; int k;
55#else
56ULtoQ(ULong *L, ULong *bits, Long exp, int k)
57#endif
58{
59	switch(k & STRTOG_Retmask) {
60	  case STRTOG_NoNumber:
61	  case STRTOG_Zero:
62		L[0] = L[1] = L[2] = L[3] = 0;
63		break;
64
65	  case STRTOG_Normal:
66	  case STRTOG_NaNbits:
67		L[_3] = bits[0];
68		L[_2] = bits[1];
69		L[_1] = bits[2];
70		L[_0] = (bits[3] & ~0x10000) | ((exp + 0x3fff + 112) << 16);
71		break;
72
73	  case STRTOG_Denormal:
74		L[_3] = bits[0];
75		L[_2] = bits[1];
76		L[_1] = bits[2];
77		L[_0] = bits[3];
78		break;
79
80	  case STRTOG_NoMemory:
81		errno = ERANGE;
82		/* FALLTHROUGH */
83	  case STRTOG_Infinite:
84		L[_0] = 0x7fff0000;
85		L[_1] = L[_2] = L[_3] = 0;
86		break;
87
88	  case STRTOG_NaN:
89		L[0] = ld_QNAN0;
90		L[1] = ld_QNAN1;
91		L[2] = ld_QNAN2;
92		L[3] = ld_QNAN3;
93	  }
94	if (k & STRTOG_Neg)
95		L[_0] |= 0x80000000L;
96	}
97
98 int
99#ifdef KR_headers
100strtorQ(s, sp, rounding, L) CONST char *s; char **sp; int rounding; void *L;
101#else
102strtorQ(CONST char *s, char **sp, int rounding, void *L)
103#endif
104{
105	static FPI fpi0 = { 113, 1-16383-113+1, 32766-16383-113+1, 1, SI };
106	FPI *fpi, fpi1;
107	ULong bits[4];
108	Long exp;
109	int k;
110
111	fpi = &fpi0;
112	if (rounding != FPI_Round_near) {
113		fpi1 = fpi0;
114		fpi1.rounding = rounding;
115		fpi = &fpi1;
116		}
117	k = strtodg(s, sp, fpi, &exp, bits);
118	ULtoQ((ULong*)L, bits, exp, k);
119	return k;
120	}
121