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xdr_float.c @ 39655741

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Last change on this file since 39655741 was 39655741, checked in by Hesham ALMatary <heshamelmatary@…>, on 03/03/15 at 18:48:14

librpc: Include or1knd part of the recongnized CPUs at xdr_float.c

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1	/*
2	* Sun RPC is a product of Sun Microsystems, Inc. and is provided for
3	* unrestricted use provided that this legend is included on all tape
4	* media and as a part of the software program in whole or part. Users
5	* may copy or modify Sun RPC without charge, but are not authorized
6	* to license or distribute it to anyone else except as part of a product or
7	* program developed by the user.
8	*
9	* SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
10	* WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
11	* PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
12	*
13	* Sun RPC is provided with no support and without any obligation on the
14	* part of Sun Microsystems, Inc. to assist in its use, correction,
15	* modification or enhancement.
16	*
17	* SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
18	* INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
19	* OR ANY PART THEREOF.
20	*
21	* In no event will Sun Microsystems, Inc. be liable for any lost revenue
22	* or profits or other special, indirect and consequential damages, even if
23	* Sun has been advised of the possibility of such damages.
24	*
25	* Sun Microsystems, Inc.
26	* 2550 Garcia Avenue
27	* Mountain View, California 94043
28	*/
29
30	#if defined(LIBC_SCCS) && !defined(lint)
31	/static char sccsid = "from: @(#)xdr_float.c 1.12 87/08/11 Copyr 1984 Sun Micro";*/
32	/static char sccsid = "from: @(#)xdr_float.c 2.1 88/07/29 4.0 RPCSRC";*/
33	static char *rcsid = "$FreeBSD: src/lib/libc/xdr/xdr_float.c,v 1.7 1999/08/28 00:02:55 peter Exp $";
34	#endif
35
36	/*
37	* xdr_float.c, Generic XDR routines impelmentation.
38	*
39	* Copyright (C) 1984, Sun Microsystems, Inc.
40	*
41	* These are the "floating point" xdr routines used to (de)serialize
42	* most common data items. See xdr.h for more info on the interface to
43	* xdr.
44	*/
45
46	#ifdef HAVE_CONFIG_H
47	#include "config.h"
48	#endif
49
50	#include <stdio.h>
51	#include <sys/types.h>
52	#include <sys/param.h>
53	#include <rpc/types.h>
54	#include <rpc/xdr.h>
55
56	/*
57	* NB: Not portable.
58	* This routine works on machines with IEEE754 FP and Vaxen.
59	*/
60
61	#if defined(__alpha__) \|\| \
62	defined(_AM29K) \|\| \
63	defined(__arm__) \|\| \
64	defined(__H8300__) \|\| defined(__h8300__) \|\| \
65	defined(__hppa__) \|\| \
66	defined(__i386__) \|\| \
67	defined(__lm32__) \|\| \
68	defined(__m68k__) \|\| defined(__mc68000__) \|\| \
69	defined(__mips__) \|\| defined(__moxie__) \|\| \
70	defined(__nios2__) \|\| \
71	defined(__ns32k__) \|\| \
72	defined(__or1k__) \|\| defined(__or1knd__) \
73	defined(__sparc__) \|\| \
74	defined(__ppc__) \|\| defined(__PPC__) \|\| \
75	defined(__sh__) \|\| \
76	defined(__AVR__) \|\| \
77	defined(__BFIN__) \|\| \
78	defined(__m32c__) \|\| \
79	defined(__M32R__) \|\| \
80	defined(__v850)
81
82	#include <rtems/endian.h>
83	#if !defined(IEEEFP)
84	#define IEEEFP
85	#endif
86
87	#elif defined(_TMS320C3x) \|\| defined(_TMS320C4x)
88	#error "Texas Instruments C3x/C4x Not supported."
89
90	#elif defined(vax)
91
92	/* What IEEE single precision floating point looks like on a Vax */
93	struct ieee_single {
94	unsigned int mantissa: 23;
95	unsigned int exp : 8;
96	unsigned int sign : 1;
97	};
98
99	/* Vax single precision floating point */
100	struct vax_single {
101	unsigned int mantissa1 : 7;
102	unsigned int exp : 8;
103	unsigned int sign : 1;
104	unsigned int mantissa2 : 16;
105	};
106
107	#define VAX_SNG_BIAS 0x81
108	#define IEEE_SNG_BIAS 0x7f
109
110	static struct sgl_limits {
111	struct vax_single s;
112	struct ieee_single ieee;
113	} sgl_limits[2] = {
114	{{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */
115	{ 0x0, 0xff, 0x0 }}, /* Max IEEE */
116	{{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */
117	{ 0x0, 0x0, 0x0 }} /* Min IEEE */
118	};
119	/* end of vax */
120	#else
121	#error "xdr_float.c: unknown CPU"
122	#endif
123
124
125	bool_t
126	xdr_float(
127	register XDR *xdrs,
128	register float *fp)
129	{
130	#ifdef IEEEFP
131	bool_t rv;
132	long tmpl;
133	#else
134	struct ieee_single is;
135	struct vax_single vs, *vsp;
136	struct sgl_limits *lim;
137	int i;
138	#endif
139	switch (xdrs->x_op) {
140
141	case XDR_ENCODE:
142	#ifdef IEEEFP
143	tmpl = (int32_t )fp;
144	return (XDR_PUTLONG(xdrs, &tmpl));
145	#else
146	vs = ((struct vax_single )fp);
147	for (i = 0, lim = sgl_limits;
148	i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
149	i++, lim++) {
150	if ((vs.mantissa2 == lim->s.mantissa2) &&
151	(vs.exp == lim->s.exp) &&
152	(vs.mantissa1 == lim->s.mantissa1)) {
153	is = lim->ieee;
154	goto shipit;
155	}
156	}
157	is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS;
158	is.mantissa = (vs.mantissa1 << 16) \| vs.mantissa2;
159	shipit:
160	is.sign = vs.sign;
161	return (XDR_PUTLONG(xdrs, (long *)&is));
162	#endif
163
164	case XDR_DECODE:
165	#ifdef IEEEFP
166	rv = XDR_GETLONG(xdrs, &tmpl);
167	(int32_t )fp = tmpl;
168	return (rv);
169	#else
170	vsp = (struct vax_single *)fp;
171	if (!XDR_GETLONG(xdrs, (long *)&is))
172	return (FALSE);
173	for (i = 0, lim = sgl_limits;
174	i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
175	i++, lim++) {
176	if ((is.exp == lim->ieee.exp) &&
177	(is.mantissa == lim->ieee.mantissa)) {
178	*vsp = lim->s;
179	goto doneit;
180	}
181	}
182	vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS;
183	vsp->mantissa2 = is.mantissa;
184	vsp->mantissa1 = (is.mantissa >> 16);
185	doneit:
186	vsp->sign = is.sign;
187	return (TRUE);
188	#endif
189
190	case XDR_FREE:
191	return (TRUE);
192	}
193	return (FALSE);
194	}
195
196	#ifdef vax
197	/* What IEEE double precision floating point looks like on a Vax */
198	struct ieee_double {
199	unsigned int mantissa1 : 20;
200	unsigned int exp : 11;
201	unsigned int sign : 1;
202	unsigned int mantissa2 : 32;
203	};
204
205	/* Vax double precision floating point */
206	struct vax_double {
207	unsigned int mantissa1 : 7;
208	unsigned int exp : 8;
209	unsigned int sign : 1;
210	unsigned int mantissa2 : 16;
211	unsigned int mantissa3 : 16;
212	unsigned int mantissa4 : 16;
213	};
214
215	#define VAX_DBL_BIAS 0x81
216	#define IEEE_DBL_BIAS 0x3ff
217	#define MASK(nbits) ((1 << nbits) - 1)
218
219	static struct dbl_limits {
220	struct vax_double d;
221	struct ieee_double ieee;
222	} dbl_limits[2] = {
223	{{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */
224	{ 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */
225	{{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */
226	{ 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */
227	};
228
229	#endif /* vax */
230
231
232	bool_t
233	xdr_double(
234	register XDR *xdrs,
235	double *dp)
236	{
237	#ifdef IEEEFP
238	register int32_t *i32p;
239	bool_t rv;
240	long tmpl;
241	#else
242	register long *lp;
243	struct ieee_double id;
244	struct vax_double vd;
245	register struct dbl_limits *lim;
246	int i;
247	#endif
248
249	switch (xdrs->x_op) {
250
251	case XDR_ENCODE:
252	#ifdef IEEEFP
253	i32p = (int32_t *)dp;
254	#if BYTE_ORDER == BIG_ENDIAN
255	tmpl = *i32p++;
256	rv = XDR_PUTLONG(xdrs, &tmpl);
257	if (!rv)
258	return (rv);
259	tmpl = *i32p;
260	rv = XDR_PUTLONG(xdrs, &tmpl);
261	#else
262	tmpl = *(i32p+1);
263	rv = XDR_PUTLONG(xdrs, &tmpl);
264	if (!rv)
265	return (rv);
266	tmpl = *i32p;
267	rv = XDR_PUTLONG(xdrs, &tmpl);
268	#endif
269	return (rv);
270	#else
271	vd = ((struct vax_double )dp);
272	for (i = 0, lim = dbl_limits;
273	i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
274	i++, lim++) {
275	if ((vd.mantissa4 == lim->d.mantissa4) &&
276	(vd.mantissa3 == lim->d.mantissa3) &&
277	(vd.mantissa2 == lim->d.mantissa2) &&
278	(vd.mantissa1 == lim->d.mantissa1) &&
279	(vd.exp == lim->d.exp)) {
280	id = lim->ieee;
281	goto shipit;
282	}
283	}
284	id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS;
285	id.mantissa1 = (vd.mantissa1 << 13) \| (vd.mantissa2 >> 3);
286	id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) \|
287	(vd.mantissa3 << 13) \|
288	((vd.mantissa4 >> 3) & MASK(13));
289	shipit:
290	id.sign = vd.sign;
291	lp = (long *)&id;
292	return (XDR_PUTLONG(xdrs, lp++) && XDR_PUTLONG(xdrs, lp));
293	#endif
294
295	case XDR_DECODE:
296	#ifdef IEEEFP
297	i32p = (int32_t *)dp;
298	#if BYTE_ORDER == BIG_ENDIAN
299	rv = XDR_GETLONG(xdrs, &tmpl);
300	*i32p++ = tmpl;
301	if (!rv)
302	return (rv);
303	rv = XDR_GETLONG(xdrs, &tmpl);
304	*i32p = tmpl;
305	#else
306	rv = XDR_GETLONG(xdrs, &tmpl);
307	*(i32p+1) = tmpl;
308	if (!rv)
309	return (rv);
310	rv = XDR_GETLONG(xdrs, &tmpl);
311	*i32p = tmpl;
312	#endif
313	return (rv);
314	#else
315	lp = (long *)&id;
316	if (!XDR_GETLONG(xdrs, lp++) \|\| !XDR_GETLONG(xdrs, lp))
317	return (FALSE);
318	for (i = 0, lim = dbl_limits;
319	i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
320	i++, lim++) {
321	if ((id.mantissa2 == lim->ieee.mantissa2) &&
322	(id.mantissa1 == lim->ieee.mantissa1) &&
323	(id.exp == lim->ieee.exp)) {
324	vd = lim->d;
325	goto doneit;
326	}
327	}
328	vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS;
329	vd.mantissa1 = (id.mantissa1 >> 13);
330	vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) \|
331	(id.mantissa2 >> 29);
332	vd.mantissa3 = (id.mantissa2 >> 13);
333	vd.mantissa4 = (id.mantissa2 << 3);
334	doneit:
335	vd.sign = id.sign;
336	dp = ((double *)&vd);
337	return (TRUE);
338	#endif
339
340	case XDR_FREE:
341	return (TRUE);
342	}
343	return (FALSE);
344	}

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source: rtems/cpukit/librpc/src/xdr/xdr_float.c @ 39655741

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