2 static char sfs_xdr_float_id[] = "@(#)xdr_float.c 2.1 97/10/23";
4 /* @(#)xdr_float.c 2.1 88/07/29 4.0 RPCSRC */
6 * Copyright (c) 1992-1997,2001 by Standard Performance Evaluation Corporation
8 * Standard Performance Evaluation Corporation (SPEC)
9 * 6585 Merchant Place, Suite 100
12 * This product contains benchmarks acquired from several sources who
13 * understand and agree with SPEC's goal of creating fair and objective
14 * benchmarks to measure computer performance.
16 * This copyright notice is placed here only to protect SPEC in the
17 * event the source is misused in any manner that is contrary to the
18 * spirit, the goals and the intent of SPEC.
20 * The source code is provided to the user or company under the license
21 * agreement for the SPEC Benchmark Suite for this product.
24 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
25 * unrestricted use provided that this legend is included on all tape
26 * media and as a part of the software program in whole or part. Users
27 * may copy or modify Sun RPC without charge, but are not authorized
28 * to license or distribute it to anyone else except as part of a product or
29 * program developed by the user.
31 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
32 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
33 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
35 * Sun RPC is provided with no support and without any obligation on the
36 * part of Sun Microsystems, Inc. to assist in its use, correction,
37 * modification or enhancement.
39 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
40 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
41 * OR ANY PART THEREOF.
43 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
44 * or profits or other special, indirect and consequential damages, even if
45 * Sun has been advised of the possibility of such damages.
47 * Sun Microsystems, Inc.
49 * Mountain View, California 94043
51 #if !defined(lint) && defined(SCCSIDS)
52 static char sccsid[] = "@(#)xdr_float.c 1.12 87/08/11 Copyr 1984 Sun Micro";
56 * xdr_float.c, Generic XDR routines impelmentation.
58 * Copyright (C) 1984, Sun Microsystems, Inc.
60 * These are the "floating point" xdr routines used to (de)serialize
61 * most common data items. See xdr.h for more info on the interface to
67 #include "rpc/types.h"
72 * This routine works on Suns (Sky / 68000's) and Vaxen.
77 /* What IEEE single precision floating point looks like on a Vax */
79 unsigned int mantissa: 23;
81 unsigned int sign : 1;
84 /* Vax single precision floating point */
86 unsigned int mantissa1 : 7;
88 unsigned int sign : 1;
89 unsigned int mantissa2 : 16;
92 #define VAX_SNG_BIAS 0x81
93 #define IEEE_SNG_BIAS 0x7f
95 static struct sgl_limits {
97 struct ieee_single ieee;
99 {{ 0x7f, 0xff, 0x0, 0xffff }, /* Max Vax */
100 { 0x0, 0xff, 0x0 }}, /* Max IEEE */
101 {{ 0x0, 0x0, 0x0, 0x0 }, /* Min Vax */
102 { 0x0, 0x0, 0x0 }} /* Min IEEE */
112 struct ieee_single is;
113 struct vax_single vs, *vsp;
114 struct sgl_limits *lim;
117 switch (xdrs->x_op) {
121 return (XDR_PUTLONG(xdrs, (int32_t *)fp));
123 vs = *((struct vax_single *)fp);
124 for (i = 0, lim = sgl_limits;
125 i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
127 if ((vs.mantissa2 == lim->s.mantissa2) &&
128 (vs.exp == lim->s.exp) &&
129 (vs.mantissa1 == lim->s.mantissa1)) {
134 is.exp = vs.exp - VAX_SNG_BIAS + IEEE_SNG_BIAS;
135 is.mantissa = (vs.mantissa1 << 16) | vs.mantissa2;
138 return (XDR_PUTLONG(xdrs, (int32_t *)&is));
143 return (XDR_GETLONG(xdrs, (int32_t *)fp));
145 vsp = (struct vax_single *)fp;
146 if (!XDR_GETLONG(xdrs, (int32_t *)&is))
148 for (i = 0, lim = sgl_limits;
149 i < sizeof(sgl_limits)/sizeof(struct sgl_limits);
151 if ((is.exp == lim->ieee.exp) &&
152 (is.mantissa == lim->ieee.mantissa)) {
157 vsp->exp = is.exp - IEEE_SNG_BIAS + VAX_SNG_BIAS;
158 vsp->mantissa2 = is.mantissa;
159 vsp->mantissa1 = (is.mantissa >> 16);
172 * This routine works on Suns (Sky / 68000's) and Vaxen.
176 /* What IEEE double precision floating point looks like on a Vax */
178 unsigned int mantissa1 : 20;
179 unsigned int exp : 11;
180 unsigned int sign : 1;
181 unsigned int mantissa2 : 32;
184 /* Vax double precision floating point */
186 unsigned int mantissa1 : 7;
187 unsigned int exp : 8;
188 unsigned int sign : 1;
189 unsigned int mantissa2 : 16;
190 unsigned int mantissa3 : 16;
191 unsigned int mantissa4 : 16;
194 #define VAX_DBL_BIAS 0x81
195 #define IEEE_DBL_BIAS 0x3ff
196 #define MASK(nbits) ((1 << nbits) - 1)
198 static struct dbl_limits {
200 struct ieee_double ieee;
202 {{ 0x7f, 0xff, 0x0, 0xffff, 0xffff, 0xffff }, /* Max Vax */
203 { 0x0, 0x7ff, 0x0, 0x0 }}, /* Max IEEE */
204 {{ 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, /* Min Vax */
205 { 0x0, 0x0, 0x0, 0x0 }} /* Min IEEE */
216 register int32_t *lp;
218 struct ieee_double id;
219 struct vax_double vd;
220 register struct dbl_limits *lim;
224 switch (xdrs->x_op) {
230 vd = *((struct vax_double *)dp);
231 for (i = 0, lim = dbl_limits;
232 i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
234 if ((vd.mantissa4 == lim->d.mantissa4) &&
235 (vd.mantissa3 == lim->d.mantissa3) &&
236 (vd.mantissa2 == lim->d.mantissa2) &&
237 (vd.mantissa1 == lim->d.mantissa1) &&
238 (vd.exp == lim->d.exp)) {
243 id.exp = vd.exp - VAX_DBL_BIAS + IEEE_DBL_BIAS;
244 id.mantissa1 = (vd.mantissa1 << 13) | (vd.mantissa2 >> 3);
245 id.mantissa2 = ((vd.mantissa2 & MASK(3)) << 29) |
246 (vd.mantissa3 << 13) |
247 ((vd.mantissa4 >> 3) & MASK(13));
252 return (XDR_PUTLONG(xdrs, lp++) && XDR_PUTLONG(xdrs, lp));
257 return (XDR_GETLONG(xdrs, lp++) && XDR_GETLONG(xdrs, lp));
260 if (!XDR_GETLONG(xdrs, lp++) || !XDR_GETLONG(xdrs, lp))
262 for (i = 0, lim = dbl_limits;
263 i < sizeof(dbl_limits)/sizeof(struct dbl_limits);
265 if ((id.mantissa2 == lim->ieee.mantissa2) &&
266 (id.mantissa1 == lim->ieee.mantissa1) &&
267 (id.exp == lim->ieee.exp)) {
272 vd.exp = id.exp - IEEE_DBL_BIAS + VAX_DBL_BIAS;
273 vd.mantissa1 = (id.mantissa1 >> 13);
274 vd.mantissa2 = ((id.mantissa1 & MASK(13)) << 3) |
275 (id.mantissa2 >> 29);
276 vd.mantissa3 = (id.mantissa2 >> 13);
277 vd.mantissa4 = (id.mantissa2 << 3);
280 *dp = *((double *)&vd);