Mercurial > hg > octave-nkf
annotate liboctave/mach-info.cc @ 15283:a95432e7309c stable release-3-6-3
Version 3.6.3 released.
* configure.ac (AC_INIT): Version is now 3.6.3.
(OCTAVE_RELEASE_DATE): Now 2012-09-04.
| author | John W. Eaton <jwe@octave.org> |
|---|---|
| date | Tue, 04 Sep 2012 13:17:13 -0400 |
| parents | 72c96de7a403 |
| children | aa490c112c88 |
| rev | line source |
|---|---|
| 1960 | 1 /* |
| 2 | |
|
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3 Copyright (C) 1996-2012 John W. Eaton |
| 1960 | 4 |
| 5 This file is part of Octave. | |
| 6 | |
| 7 Octave is free software; you can redistribute it and/or modify it | |
| 8 under the terms of the GNU General Public License as published by the | |
| 7016 | 9 Free Software Foundation; either version 3 of the License, or (at your |
| 10 option) any later version. | |
| 1960 | 11 |
| 12 Octave is distributed in the hope that it will be useful, but WITHOUT | |
| 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 15 for more details. | |
| 16 | |
| 17 You should have received a copy of the GNU General Public License | |
| 7016 | 18 along with Octave; see the file COPYING. If not, see |
| 19 <http://www.gnu.org/licenses/>. | |
| 1960 | 20 |
| 21 */ | |
| 22 | |
| 23 #ifdef HAVE_CONFIG_H | |
| 24 #include <config.h> | |
| 25 #endif | |
| 26 | |
| 27 #include "f77-fcn.h" | |
| 2317 | 28 #include "lo-error.h" |
| 29 #include "mach-info.h" | |
|
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30 #include "singleton-cleanup.h" |
| 1960 | 31 |
| 32 extern "C" | |
| 33 { | |
| 5275 | 34 double F77_FUNC (d1mach, D1MACH) (const octave_idx_type&); |
| 1960 | 35 } |
| 36 | |
| 2317 | 37 oct_mach_info *oct_mach_info::instance = 0; |
| 1960 | 38 |
| 39 union equiv | |
| 40 { | |
| 41 double d; | |
| 42 int i[2]; | |
| 43 }; | |
| 44 | |
| 45 struct | |
| 46 float_params | |
| 47 { | |
| 2317 | 48 oct_mach_info::float_format fp_fmt; |
| 1960 | 49 equiv fp_par[4]; |
| 50 }; | |
| 51 | |
| 52 #define INIT_FLT_PAR(fp, fmt, sm1, sm2, lrg1, lrg2, rt1, rt2, dv1, dv2) \ | |
| 53 do \ | |
| 54 { \ | |
| 55 fp.fp_fmt = (fmt); \ | |
| 56 fp.fp_par[0].i[0] = (sm1); fp.fp_par[0].i[1] = (sm2); \ | |
| 57 fp.fp_par[1].i[0] = (lrg1); fp.fp_par[1].i[1] = (lrg2); \ | |
| 58 fp.fp_par[2].i[0] = (rt1); fp.fp_par[2].i[1] = (rt2); \ | |
| 59 fp.fp_par[3].i[0] = (dv1); fp.fp_par[3].i[1] = (dv2); \ | |
| 60 } \ | |
| 61 while (0) | |
| 62 | |
| 63 static int | |
| 64 equiv_compare (const equiv *std, const equiv *v, int len) | |
| 65 { | |
| 66 int i; | |
| 67 for (i = 0; i < len; i++) | |
| 68 if (v[i].i[0] != std[i].i[0] || v[i].i[1] != std[i].i[1]) | |
| 69 return 0; | |
| 70 return 1; | |
| 71 } | |
| 72 | |
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73 static oct_mach_info::float_format |
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74 get_float_format (void) |
| 1960 | 75 { |
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76 oct_mach_info::float_format retval = oct_mach_info::flt_fmt_unknown; |
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77 |
| 4605 | 78 #if defined (CRAY) |
| 79 | |
| 5775 | 80 // FIXME -- this should be determined automatically. |
| 4605 | 81 |
| 82 native_float_fmt = oct_mach_info::flt_fmt_cray; | |
| 83 | |
| 84 #else | |
| 85 | |
| 1960 | 86 float_params fp[5]; |
| 87 | |
| 4574 | 88 INIT_FLT_PAR (fp[0], oct_mach_info::flt_fmt_ieee_big_endian, |
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89 1048576, 0, |
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90 2146435071, -1, |
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91 1017118720, 0, |
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92 1018167296, 0); |
| 1960 | 93 |
| 4574 | 94 INIT_FLT_PAR (fp[1], oct_mach_info::flt_fmt_ieee_little_endian, |
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95 0, 1048576, |
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96 -1, 2146435071, |
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97 0, 1017118720, |
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98 0, 1018167296); |
| 1960 | 99 |
| 4574 | 100 INIT_FLT_PAR (fp[2], oct_mach_info::flt_fmt_vax_d, |
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101 128, 0, |
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102 -32769, -1, |
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103 9344, 0, |
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104 9344, 0); |
| 1960 | 105 |
| 4574 | 106 INIT_FLT_PAR (fp[3], oct_mach_info::flt_fmt_vax_g, |
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107 16, 0, |
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108 -32769, -1, |
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109 15552, 0, |
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110 15552, 0); |
| 1960 | 111 |
| 4574 | 112 INIT_FLT_PAR (fp[4], oct_mach_info::flt_fmt_unknown, |
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113 0, 0, |
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114 0, 0, |
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115 0, 0, |
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116 0, 0); |
| 1960 | 117 |
| 118 equiv mach_fp_par[4]; | |
| 119 | |
| 3887 | 120 mach_fp_par[0].d = F77_FUNC (d1mach, D1MACH) (1); |
| 121 mach_fp_par[1].d = F77_FUNC (d1mach, D1MACH) (2); | |
| 122 mach_fp_par[2].d = F77_FUNC (d1mach, D1MACH) (3); | |
| 123 mach_fp_par[3].d = F77_FUNC (d1mach, D1MACH) (4); | |
| 1960 | 124 |
| 125 int i = 0; | |
| 126 do | |
| 127 { | |
| 128 if (equiv_compare (fp[i].fp_par, mach_fp_par, 4)) | |
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129 { |
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130 retval = fp[i].fp_fmt; |
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131 break; |
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132 } |
| 1960 | 133 } |
| 4574 | 134 while (fp[++i].fp_fmt != oct_mach_info::flt_fmt_unknown); |
| 4605 | 135 |
| 136 #endif | |
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137 |
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138 return retval; |
| 2317 | 139 } |
| 140 | |
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141 static bool |
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142 ten_little_endians (void) |
| 2317 | 143 { |
| 144 // Are we little or big endian? From Harbison & Steele. | |
| 145 | |
| 146 union | |
| 147 { | |
| 148 long l; | |
| 149 char c[sizeof (long)]; | |
| 150 } u; | |
| 151 | |
| 152 u.l = 1; | |
| 153 | |
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154 return (u.c[sizeof (long) - 1] == 1); |
| 2317 | 155 } |
| 156 | |
| 157 oct_mach_info::oct_mach_info (void) | |
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158 : native_float_fmt (get_float_format ()), |
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159 big_chief (ten_little_endians ()) { } |
| 2317 | 160 |
| 2926 | 161 bool |
| 162 oct_mach_info::instance_ok (void) | |
| 163 { | |
| 164 bool retval = true; | |
| 165 | |
| 166 if (! instance) | |
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167 { |
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168 instance = new oct_mach_info (); |
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169 |
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170 if (instance) |
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171 singleton_cleanup_list::add (cleanup_instance); |
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172 } |
| 2926 | 173 |
| 174 if (! instance) | |
| 175 { | |
| 176 (*current_liboctave_error_handler) | |
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177 ("unable to create command history object!"); |
| 2926 | 178 |
| 179 retval = false; | |
| 180 } | |
| 181 | |
| 182 return retval; | |
| 183 } | |
| 184 | |
| 2317 | 185 oct_mach_info::float_format |
| 186 oct_mach_info::native_float_format (void) | |
| 187 { | |
| 2926 | 188 return (instance_ok ()) |
| 4574 | 189 ? instance->native_float_fmt : oct_mach_info::flt_fmt_unknown; |
| 2317 | 190 } |
| 191 | |
| 192 bool | |
| 193 oct_mach_info::words_big_endian (void) | |
| 194 { | |
| 2926 | 195 return (instance_ok ()) |
| 196 ? instance->big_chief : false; | |
| 2317 | 197 } |
| 198 | |
| 199 bool | |
| 200 oct_mach_info::words_little_endian (void) | |
| 201 { | |
| 2926 | 202 return (instance_ok ()) |
| 203 ? (! instance->big_chief) : false; | |
| 2317 | 204 } |
| 205 | |
| 206 oct_mach_info::float_format | |
| 3504 | 207 oct_mach_info::string_to_float_format (const std::string& s) |
| 2317 | 208 { |
| 4574 | 209 oct_mach_info::float_format retval = oct_mach_info::flt_fmt_unknown; |
| 1960 | 210 |
| 2317 | 211 if (s == "native" || s == "n") |
| 5015 | 212 retval = oct_mach_info::native_float_format (); |
| 2317 | 213 else if (s == "ieee-be" || s == "b") |
| 4574 | 214 retval = oct_mach_info::flt_fmt_ieee_big_endian; |
| 2317 | 215 else if (s == "ieee-le" || s == "l") |
| 4574 | 216 retval = oct_mach_info::flt_fmt_ieee_little_endian; |
| 2317 | 217 else if (s == "vaxd" || s == "d") |
| 4574 | 218 retval = oct_mach_info::flt_fmt_vax_d; |
| 2759 | 219 else if (s == "vaxg" || s == "g") |
| 4574 | 220 retval = oct_mach_info::flt_fmt_vax_g; |
| 2317 | 221 else if (s == "cray" || s == "c") |
| 4574 | 222 retval = oct_mach_info::flt_fmt_cray; |
| 2317 | 223 else if (s == "unknown") |
| 4574 | 224 retval = oct_mach_info::flt_fmt_unknown; |
| 2317 | 225 else |
| 226 (*current_liboctave_error_handler) | |
| 227 ("invalid architecture type specified"); | |
| 228 | |
| 229 return retval; | |
| 230 } | |
| 231 | |
| 3504 | 232 std::string |
| 2317 | 233 oct_mach_info::float_format_as_string (float_format flt_fmt) |
| 234 { | |
| 3504 | 235 std::string retval = "unknown"; |
| 2317 | 236 |
| 237 switch (flt_fmt) | |
| 238 { | |
| 4574 | 239 case flt_fmt_ieee_big_endian: |
| 2317 | 240 retval = "ieee_big_endian"; |
| 241 break; | |
| 242 | |
| 4574 | 243 case flt_fmt_ieee_little_endian: |
| 2317 | 244 retval = "ieee_little_endian"; |
| 245 break; | |
| 246 | |
| 4574 | 247 case flt_fmt_vax_d: |
| 2317 | 248 retval = "vax_d_float"; |
| 249 break; | |
| 250 | |
| 4574 | 251 case flt_fmt_vax_g: |
| 2317 | 252 retval = "vax_g_float"; |
| 253 break; | |
| 254 | |
| 4574 | 255 case flt_fmt_cray: |
| 2317 | 256 retval = "cray"; |
| 257 break; | |
| 258 | |
| 259 default: | |
| 260 break; | |
| 261 } | |
| 262 | |
| 263 return retval; | |
| 1960 | 264 } |