gcc/config/s390/fixdfdi.h

   1 /* Definitions of target machine for GNU compiler, for IBM S/390
   2    Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
   3    Contributed by Hartmut Penner (hpenner@de.ibm.com) and
   4                   Ulrich Weigand (uweigand@de.ibm.com).
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  21 02111-1307, USA.  */
  22
  23 #ifdef L_fixunsdfdi
  24 #define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
  25 #define EXCESSD         1022
  26 #define SIGNBIT         0x80000000
  27 #define SIGND(fp)       ((fp.l.upper) & SIGNBIT)
  28 #define MANTD_LL(fp)    ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
  29 #define FRACD_LL(fp)    (fp.ll & (HIDDEND_LL-1))
  30 #define HIDDEND_LL      ((UDItype_x)1 << 52)
  31
  32 typedef int DItype_x __attribute__ ((mode (DI)));
  33 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
  34 typedef int SItype_x __attribute__ ((mode (SI)));
  35 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
  36
  37 union double_long {
  38     double d;
  39     struct {
  40       SItype_x upper;
  41       USItype_x lower;
  42     } l;
  43     UDItype_x ll;
  44 };
  45
  46 UDItype_x __fixunsdfdi (double a1);
  47
  48 /* convert double to unsigned int */
  49 UDItype_x
  50 __fixunsdfdi (double a1)
  51 {
  52     register union double_long dl1;
  53     register int exp;
  54     register UDItype_x l;
  55
  56     dl1.d = a1;
  57
  58     /* +/- 0, denormalized, negativ */
  59
  60     if (!EXPD (dl1) || SIGND(dl1))
  61       return 0;
  62
  63     exp = EXPD (dl1) - EXCESSD - 53;
  64
  65     /* number < 1 */
  66
  67     if (exp < -53)
  68       return 0;
  69
  70     /* NaN */
  71
  72     if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
  73       return 0x0ULL;
  74
  75     /* Number big number & + inf */
  76
  77     if (exp >= 12) {
  78       return 0xFFFFFFFFFFFFFFFFULL;
  79     }
  80
  81     l = MANTD_LL(dl1);
  82
  83     /* shift down until exp < 12 or l = 0 */
  84     if (exp > 0)
  85       l <<= exp;
  86     else
  87       l >>= -exp;
  88
  89     return l;
  90 }
  91 #define __fixunsdfdi ___fixunsdfdi
  92 #endif
  93 #undef L_fixunsdfdi
  94
  95 #ifdef L_fixdfdi
  96 #define EXPD(fp)        (((fp.l.upper) >> 20) & 0x7FF)
  97 #define EXCESSD         1022
  98 #define SIGNBIT         0x80000000
  99 #define SIGND(fp)       ((fp.l.upper) & SIGNBIT)
 100 #define MANTD_LL(fp)    ((fp.ll & (HIDDEND_LL-1)) | HIDDEND_LL)
 101 #define FRACD_LL(fp)    (fp.ll & (HIDDEND_LL-1))
 102 #define HIDDEND_LL      ((UDItype_x)1 << 52)
 103
 104 typedef int DItype_x __attribute__ ((mode (DI)));
 105 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
 106 typedef int SItype_x __attribute__ ((mode (SI)));
 107 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
 108
 109 union double_long {
 110     double d;
 111     struct {
 112       SItype_x upper;
 113       USItype_x lower;
 114     } l;
 115     UDItype_x ll;
 116 };
 117
 118 DItype_x __fixdfdi (double a1);
 119
 120 /* convert double to int */
 121 DItype_x
 122 __fixdfdi (double a1)
 123 {
 124     register union double_long dl1;
 125     register int exp;
 126     register DItype_x l;
 127
 128     dl1.d = a1;
 129
 130     /* +/- 0, denormalized */
 131
 132     if (!EXPD (dl1))
 133       return 0;
 134
 135     exp = EXPD (dl1) - EXCESSD - 53;
 136
 137     /* number < 1 */
 138
 139     if (exp < -53)
 140       return 0;
 141
 142     /* NaN */
 143
 144     if ((EXPD(dl1) == 0x7ff) && (FRACD_LL(dl1) != 0)) /* NaN */
 145       return 0x8000000000000000ULL;
 146
 147     /* Number big number & +/- inf */
 148
 149     if (exp >= 11) {
 150         l = (long long)1<<63;
 151         if (!SIGND(dl1))
 152             l--;
 153         return l;
 154     }
 155
 156     l = MANTD_LL(dl1);
 157
 158     /* shift down until exp < 12 or l = 0 */
 159     if (exp > 0)
 160       l <<= exp;
 161     else
 162       l >>= -exp;
 163
 164     return (SIGND (dl1) ? -l : l);
 165 }
 166 #define __fixdfdi ___fixdfdi
 167 #endif
 168 #undef L_fixdfdi
 169
 170 #ifdef L_fixunssfdi
 171 #define EXP(fp)         (((fp.l) >> 23) & 0xFF)
 172 #define EXCESS          126
 173 #define SIGNBIT         0x80000000
 174 #define SIGN(fp)        ((fp.l) & SIGNBIT)
 175 #define HIDDEN          (1 << 23)
 176 #define MANT(fp)        (((fp.l) & 0x7FFFFF) | HIDDEN)
 177 #define FRAC(fp)        ((fp.l) & 0x7FFFFF)
 178
 179 typedef int DItype_x __attribute__ ((mode (DI)));
 180 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
 181 typedef int SItype_x __attribute__ ((mode (SI)));
 182 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
 183
 184 union float_long
 185   {
 186     float f;
 187     USItype_x l;
 188   };
 189
 190 UDItype_x __fixunssfdi (float a1);
 191
 192 /* convert float to unsigned int */
 193 UDItype_x
 194 __fixunssfdi (float a1)
 195 {
 196     register union float_long fl1;
 197     register int exp;
 198     register UDItype_x l;
 199
 200     fl1.f = a1;
 201
 202     /* +/- 0, denormalized, negativ */
 203
 204     if (!EXP (fl1) || SIGN(fl1))
 205       return 0;
 206
 207     exp = EXP (fl1) - EXCESS - 24;
 208
 209     /* number < 1 */
 210
 211     if (exp < -24)
 212       return 0;
 213
 214     /* NaN */
 215
 216     if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
 217       return 0x0ULL;
 218
 219     /* Number big number & + inf */
 220
 221     if (exp >= 41) {
 222       return 0xFFFFFFFFFFFFFFFFULL;
 223     }
 224
 225     l = MANT(fl1);
 226
 227     if (exp > 0)
 228       l <<= exp;
 229     else
 230       l >>= -exp;
 231
 232     return l;
 233 }
 234 #define __fixunssfdi ___fixunssfdi
 235 #endif
 236 #undef L_fixunssfdi
 237
 238 #ifdef L_fixsfdi
 239 #define EXP(fp)         (((fp.l) >> 23) & 0xFF)
 240 #define EXCESS          126
 241 #define SIGNBIT         0x80000000
 242 #define SIGN(fp)        ((fp.l) & SIGNBIT)
 243 #define HIDDEN          (1 << 23)
 244 #define MANT(fp)        (((fp.l) & 0x7FFFFF) | HIDDEN)
 245 #define FRAC(fp)        ((fp.l) & 0x7FFFFF)
 246
 247 typedef int DItype_x __attribute__ ((mode (DI)));
 248 typedef unsigned int UDItype_x __attribute__ ((mode (DI)));
 249 typedef int SItype_x __attribute__ ((mode (SI)));
 250 typedef unsigned int USItype_x __attribute__ ((mode (SI)));
 251
 252 union float_long
 253   {
 254     float f;
 255     USItype_x l;
 256   };
 257
 258 DItype_x __fixsfdi (float a1);
 259
 260 /* convert double to int */
 261 DItype_x
 262 __fixsfdi (float a1)
 263 {
 264     register union float_long fl1;
 265     register int exp;
 266     register DItype_x l;
 267
 268     fl1.f = a1;
 269
 270     /* +/- 0, denormalized */
 271
 272     if (!EXP (fl1))
 273       return 0;
 274
 275     exp = EXP (fl1) - EXCESS - 24;
 276
 277     /* number < 1 */
 278
 279     if (exp < -24)
 280       return 0;
 281
 282     /* NaN */
 283
 284     if ((EXP(fl1) == 0xff) && (FRAC(fl1) != 0)) /* NaN */
 285       return 0x8000000000000000ULL;
 286
 287     /* Number big number & +/- inf */
 288
 289     if (exp >= 40) {
 290         l = (long long)1<<63;
 291         if (!SIGN(fl1))
 292             l--;
 293         return l;
 294     }
 295
 296     l = MANT(fl1);
 297
 298     if (exp > 0)
 299       l <<= exp;
 300     else
 301       l >>= -exp;
 302
 303     return (SIGN (fl1) ? -l : l);
 304 }
 305 #define __fixsfdi ___fixsfdi
 306 #endif
 307 #undef L_fixsfdi
 308