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28f540f4 | 1 | /* |
a7ab6ec8 | 2 | * xdr_float.c, Generic XDR routines implementation. |
ba1ffaa1 | 3 | * |
a7ab6ec8 | 4 | * Copyright (c) 2010, Oracle America, Inc. |
ba1ffaa1 | 5 | * |
a7ab6ec8 UD |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions are | |
8 | * met: | |
cb636bb2 | 9 | * |
a7ab6ec8 UD |
10 | * * Redistributions of source code must retain the above copyright |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * * Redistributions in binary form must reproduce the above | |
13 | * copyright notice, this list of conditions and the following | |
14 | * disclaimer in the documentation and/or other materials | |
15 | * provided with the distribution. | |
16 | * * Neither the name of the "Oracle America, Inc." nor the names of its | |
17 | * contributors may be used to endorse or promote products derived | |
18 | * from this software without specific prior written permission. | |
cb636bb2 | 19 | * |
a7ab6ec8 UD |
20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS | |
23 | * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE | |
24 | * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, | |
25 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE | |
27 | * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
28 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, | |
29 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
28f540f4 RM |
32 | * |
33 | * These are the "floating point" xdr routines used to (de)serialize | |
34 | * most common data items. See xdr.h for more info on the interface to | |
35 | * xdr. | |
36 | */ | |
37 | ||
38 | #include <stdio.h> | |
ba1ffaa1 | 39 | #include <endian.h> |
28f540f4 RM |
40 | |
41 | #include <rpc/types.h> | |
42 | #include <rpc/xdr.h> | |
82f43dd2 | 43 | #include <shlib-compat.h> |
28f540f4 RM |
44 | |
45 | /* | |
46 | * NB: Not portable. | |
47 | * This routine works on Suns (Sky / 68000's) and Vaxen. | |
48 | */ | |
49 | ||
0d57f695 | 50 | #define LSW (__FLOAT_WORD_ORDER == __BIG_ENDIAN) |
ba1ffaa1 | 51 | |
28f540f4 RM |
52 | #ifdef vax |
53 | ||
54 | /* What IEEE single precision floating point looks like on a Vax */ | |
55 | struct ieee_single { | |
56 | unsigned int mantissa: 23; | |
57 | unsigned int exp : 8; | |
58 | unsigned int sign : 1; | |
59 | }; | |
60 | ||
61 | /* Vax single precision floating point */ | |
62 | struct vax_single { | |
63 | unsigned int mantissa1 : 7; | |
64 | unsigned int exp : 8; | |
65 | unsigned int sign : 1; | |
66 | unsigned int mantissa2 : 16; | |
67 | }; | |
68 | ||
69 | #define VAX_SNG_BIAS 0x81 | |
70 | #define IEEE_SNG_BIAS 0x7f | |
71 | ||
72 | static struct sgl_limits { | |
73 | struct vax_single s; | |
74 | struct ieee_single ieee; | |
75 | } sgl_limits[2] = { | |
76 | {{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */ | |
77 | { 0x0, 0xff, 0x0 }}, /* Max IEEE */ | |
78 | {{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */ | |
79 | { 0x0, 0x0, 0x0 }} /* Min IEEE */ | |
80 | }; | |
81 | #endif /* vax */ | |
82 | ||
83 | bool_t | |
9d46370c | 84 | xdr_float (XDR *xdrs, float *fp) |
28f540f4 RM |
85 | { |
86 | #ifdef vax | |
87 | struct ieee_single is; | |
88 | struct vax_single vs, *vsp; | |
89 | struct sgl_limits *lim; | |
90 | int i; | |
91 | #endif | |
92 | switch (xdrs->x_op) { | |
93 | ||
94 | case XDR_ENCODE: | |
ba1ffaa1 | 95 | #ifdef vax |
28f540f4 RM |
96 | vs = *((struct vax_single *)fp); |
97 | for (i = 0, lim = sgl_limits; | |
98 | i < sizeof(sgl_limits)/sizeof(struct sgl_limits); | |
99 | i++, lim++) { | |
100 | if ((vs.mantissa2 == lim->s.mantissa2) && | |
101 | (vs.exp == lim->s.exp) && | |
102 | (vs.mantissa1 == lim->s.mantissa1)) { | |
103 | is = lim->ieee; | |
104 | goto shipit; | |
105 | } | |
106 | } | |
107 | is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS; | |
108 | is.mantissa = (vs.mantissa1 << 16) | vs.mantissa2; | |
109 | shipit: | |
110 | is.sign = vs.sign; | |
111 | return (XDR_PUTLONG(xdrs, (long *)&is)); | |
ba1ffaa1 UD |
112 | #else |
113 | if (sizeof(float) == sizeof(long)) | |
114 | return (XDR_PUTLONG(xdrs, (long *)fp)); | |
115 | else if (sizeof(float) == sizeof(int)) { | |
116 | long tmp = *(int *)fp; | |
117 | return (XDR_PUTLONG(xdrs, &tmp)); | |
118 | } | |
119 | break; | |
28f540f4 RM |
120 | #endif |
121 | ||
122 | case XDR_DECODE: | |
ba1ffaa1 | 123 | #ifdef vax |
28f540f4 RM |
124 | vsp = (struct vax_single *)fp; |
125 | if (!XDR_GETLONG(xdrs, (long *)&is)) | |
126 | return (FALSE); | |
127 | for (i = 0, lim = sgl_limits; | |
128 | i < sizeof(sgl_limits)/sizeof(struct sgl_limits); | |
129 | i++, lim++) { | |
130 | if ((is.exp == lim->ieee.exp) && | |
131 | (is.mantissa == lim->ieee.mantissa)) { | |
132 | *vsp = lim->s; | |
133 | goto doneit; | |
134 | } | |
135 | } | |
136 | vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS; | |
137 | vsp->mantissa2 = is.mantissa; | |
138 | vsp->mantissa1 = (is.mantissa >> 16); | |
139 | doneit: | |
140 | vsp->sign = is.sign; | |
141 | return (TRUE); | |
ba1ffaa1 UD |
142 | #else |
143 | if (sizeof(float) == sizeof(long)) | |
144 | return (XDR_GETLONG(xdrs, (long *)fp)); | |
145 | else if (sizeof(float) == sizeof(int)) { | |
146 | long tmp; | |
147 | if (XDR_GETLONG(xdrs, &tmp)) { | |
148 | *(int *)fp = tmp; | |
149 | return (TRUE); | |
150 | } | |
151 | } | |
152 | break; | |
28f540f4 RM |
153 | #endif |
154 | ||
155 | case XDR_FREE: | |
156 | return (TRUE); | |
157 | } | |
158 | return (FALSE); | |
159 | } | |
021db4be | 160 | libc_hidden_nolink_sunrpc (xdr_float, GLIBC_2_0) |
28f540f4 RM |
161 | |
162 | /* | |
163 | * This routine works on Suns (Sky / 68000's) and Vaxen. | |
164 | */ | |
165 | ||
166 | #ifdef vax | |
167 | /* What IEEE double precision floating point looks like on a Vax */ | |
168 | struct ieee_double { | |
169 | unsigned int mantissa1 : 20; | |
170 | unsigned int exp : 11; | |
171 | unsigned int sign : 1; | |
172 | unsigned int mantissa2 : 32; | |
173 | }; | |
174 | ||
175 | /* Vax double precision floating point */ | |
176 | struct vax_double { | |
177 | unsigned int mantissa1 : 7; | |
178 | unsigned int exp : 8; | |
179 | unsigned int sign : 1; | |
180 | unsigned int mantissa2 : 16; | |
181 | unsigned int mantissa3 : 16; | |
182 | unsigned int mantissa4 : 16; | |
183 | }; | |
184 | ||
185 | #define VAX_DBL_BIAS 0x81 | |
186 | #define IEEE_DBL_BIAS 0x3ff | |
187 | #define MASK(nbits) ((1 << nbits) - 1) | |
188 | ||
189 | static struct dbl_limits { | |
190 | struct vax_double d; | |
191 | struct ieee_double ieee; | |
192 | } dbl_limits[2] = { | |
193 | {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */ | |
194 | { 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */ | |
195 | {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */ | |
196 | { 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */ | |
197 | }; | |
198 | ||
199 | #endif /* vax */ | |
200 | ||
201 | ||
202 | bool_t | |
9d46370c | 203 | xdr_double (XDR *xdrs, double *dp) |
28f540f4 | 204 | { |
28f540f4 RM |
205 | #ifdef vax |
206 | struct ieee_double id; | |
207 | struct vax_double vd; | |
208 | register struct dbl_limits *lim; | |
209 | int i; | |
210 | #endif | |
211 | ||
212 | switch (xdrs->x_op) { | |
213 | ||
214 | case XDR_ENCODE: | |
ba1ffaa1 | 215 | #ifdef vax |
28f540f4 RM |
216 | vd = *((struct vax_double *)dp); |
217 | for (i = 0, lim = dbl_limits; | |
218 | i < sizeof(dbl_limits)/sizeof(struct dbl_limits); | |
219 | i++, lim++) { | |
220 | if ((vd.mantissa4 == lim->d.mantissa4) && | |
221 | (vd.mantissa3 == lim->d.mantissa3) && | |
222 | (vd.mantissa2 == lim->d.mantissa2) && | |
223 | (vd.mantissa1 == lim->d.mantissa1) && | |
224 | (vd.exp == lim->d.exp)) { | |
225 | id = lim->ieee; | |
226 | goto shipit; | |
227 | } | |
228 | } | |
229 | id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS; | |
230 | id.mantissa1 = (vd.mantissa1 << 13) | (vd.mantissa2 >> 3); | |
231 | id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) | | |
232 | (vd.mantissa3 << 13) | | |
233 | ((vd.mantissa4 >> 3) & MASK(13)); | |
234 | shipit: | |
235 | id.sign = vd.sign; | |
ba1ffaa1 | 236 | dp = (double *)&id; |
28f540f4 | 237 | #endif |
ba1ffaa1 UD |
238 | if (2*sizeof(long) == sizeof(double)) { |
239 | long *lp = (long *)dp; | |
240 | return (XDR_PUTLONG(xdrs, lp+!LSW) && | |
241 | XDR_PUTLONG(xdrs, lp+LSW)); | |
242 | } else if (2*sizeof(int) == sizeof(double)) { | |
243 | int *ip = (int *)dp; | |
244 | long tmp[2]; | |
245 | tmp[0] = ip[!LSW]; | |
246 | tmp[1] = ip[LSW]; | |
247 | return (XDR_PUTLONG(xdrs, tmp) && | |
248 | XDR_PUTLONG(xdrs, tmp+1)); | |
249 | } | |
250 | break; | |
28f540f4 RM |
251 | |
252 | case XDR_DECODE: | |
ba1ffaa1 | 253 | #ifdef vax |
28f540f4 RM |
254 | lp = (long *)&id; |
255 | if (!XDR_GETLONG(xdrs, lp++) || !XDR_GETLONG(xdrs, lp)) | |
256 | return (FALSE); | |
257 | for (i = 0, lim = dbl_limits; | |
258 | i < sizeof(dbl_limits)/sizeof(struct dbl_limits); | |
259 | i++, lim++) { | |
260 | if ((id.mantissa2 == lim->ieee.mantissa2) && | |
261 | (id.mantissa1 == lim->ieee.mantissa1) && | |
262 | (id.exp == lim->ieee.exp)) { | |
263 | vd = lim->d; | |
264 | goto doneit; | |
265 | } | |
266 | } | |
267 | vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS; | |
268 | vd.mantissa1 = (id.mantissa1 >> 13); | |
269 | vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) | | |
270 | (id.mantissa2 >> 29); | |
271 | vd.mantissa3 = (id.mantissa2 >> 13); | |
272 | vd.mantissa4 = (id.mantissa2 << 3); | |
273 | doneit: | |
274 | vd.sign = id.sign; | |
275 | *dp = *((double *)&vd); | |
276 | return (TRUE); | |
ba1ffaa1 UD |
277 | #else |
278 | if (2*sizeof(long) == sizeof(double)) { | |
279 | long *lp = (long *)dp; | |
280 | return (XDR_GETLONG(xdrs, lp+!LSW) && | |
281 | XDR_GETLONG(xdrs, lp+LSW)); | |
282 | } else if (2*sizeof(int) == sizeof(double)) { | |
283 | int *ip = (int *)dp; | |
284 | long tmp[2]; | |
285 | if (XDR_GETLONG(xdrs, tmp+!LSW) && | |
286 | XDR_GETLONG(xdrs, tmp+LSW)) { | |
287 | ip[0] = tmp[0]; | |
288 | ip[1] = tmp[1]; | |
289 | return (TRUE); | |
290 | } | |
291 | } | |
292 | break; | |
28f540f4 RM |
293 | #endif |
294 | ||
295 | case XDR_FREE: | |
296 | return (TRUE); | |
297 | } | |
298 | return (FALSE); | |
299 | } | |
021db4be | 300 | libc_hidden_nolink_sunrpc (xdr_double, GLIBC_2_0) |