libgcc/config/mips/sfp-machine.h

   1 /* softfp machine description for MIPS.
   2    Copyright (C) 2009-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 #ifdef __mips64
  26 #define _FP_W_TYPE_SIZE         64
  27 #define _FP_W_TYPE              unsigned long long
  28 #define _FP_WS_TYPE             signed long long
  29 #define _FP_I_TYPE              long long
  30
  31 typedef int TItype __attribute__ ((mode (TI)));
  32 typedef unsigned int UTItype __attribute__ ((mode (TI)));
  33 #define TI_BITS (__CHAR_BIT__ * (int) sizeof (TItype))
  34
  35 #define _FP_MUL_MEAT_S(R,X,Y)                           \
  36   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  37 #define _FP_MUL_MEAT_D(R,X,Y)                           \
  38   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  39 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  40   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  41
  42 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
  43 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
  44 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
  45
  46 #ifdef __mips_nan2008
  47 # define _FP_NANFRAC_S          ((_FP_QNANBIT_S << 1) - 1)
  48 # define _FP_NANFRAC_D          ((_FP_QNANBIT_D << 1) - 1)
  49 # define _FP_NANFRAC_Q          ((_FP_QNANBIT_Q << 1) - 1), -1
  50 #else
  51 # define _FP_NANFRAC_S          (_FP_QNANBIT_S - 1)
  52 # define _FP_NANFRAC_D          (_FP_QNANBIT_D - 1)
  53 # define _FP_NANFRAC_Q          (_FP_QNANBIT_Q - 1), -1
  54 #endif
  55 #else
  56 #define _FP_W_TYPE_SIZE         32
  57 #define _FP_W_TYPE              unsigned int
  58 #define _FP_WS_TYPE             signed int
  59 #define _FP_I_TYPE              int
  60
  61 #define _FP_MUL_MEAT_S(R,X,Y)                           \
  62   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  63 #define _FP_MUL_MEAT_D(R,X,Y)                           \
  64   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  65 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  66   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  67
  68 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(S,R,X,Y)
  69 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
  70 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
  71
  72 #ifdef __mips_nan2008
  73 # define _FP_NANFRAC_S          ((_FP_QNANBIT_S << 1) - 1)
  74 # define _FP_NANFRAC_D          ((_FP_QNANBIT_D << 1) - 1), -1
  75 # define _FP_NANFRAC_Q          ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
  76 #else
  77 # define _FP_NANFRAC_S          (_FP_QNANBIT_S - 1)
  78 # define _FP_NANFRAC_D          (_FP_QNANBIT_D - 1), -1
  79 # define _FP_NANFRAC_Q          (_FP_QNANBIT_Q - 1), -1, -1, -1
  80 #endif
  81 #endif
  82
  83 /* The type of the result of a floating point comparison.  This must
  84    match __libgcc_cmp_return__ in GCC for the target.  */
  85 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
  86 #define CMPtype __gcc_CMPtype
  87
  88 #define _FP_NANSIGN_S           0
  89 #define _FP_NANSIGN_D           0
  90 #define _FP_NANSIGN_Q           0
  91
  92 #define _FP_KEEPNANFRACP 1
  93 #ifdef __mips_nan2008
  94 # define _FP_QNANNEGATEDP 0
  95 #else
  96 # define _FP_QNANNEGATEDP 1
  97 #endif
  98
  99 #ifdef __mips_nan2008
 100 /* NaN payloads should be preserved for NAN2008.  */
 101 # define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)     \
 102   do                                            \
 103     {                                           \
 104       R##_s = X##_s;                            \
 105       _FP_FRAC_COPY_##wc (R, X);                \
 106       R##_c = FP_CLS_NAN;                       \
 107     }                                           \
 108   while (0)
 109 #else
 110 /* Comment from glibc: */
 111 /* From my experiments it seems X is chosen unless one of the
 112    NaNs is sNaN,  in which case the result is NANSIGN/NANFRAC.  */
 113 # define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                     \
 114   do {                                                          \
 115     if ((_FP_FRAC_HIGH_RAW_##fs(X) |                            \
 116          _FP_FRAC_HIGH_RAW_##fs(Y)) & _FP_QNANBIT_##fs)         \
 117       {                                                         \
 118         R##_s = _FP_NANSIGN_##fs;                               \
 119         _FP_FRAC_SET_##wc(R,_FP_NANFRAC_##fs);                  \
 120       }                                                         \
 121     else                                                        \
 122       {                                                         \
 123         R##_s = X##_s;                                          \
 124         _FP_FRAC_COPY_##wc(R,X);                                \
 125       }                                                         \
 126     R##_c = FP_CLS_NAN;                                         \
 127   } while (0)
 128 #endif
 129
 130 #ifdef __mips_hard_float
 131 #define FP_EX_INVALID           0x40
 132 #define FP_EX_DIVZERO           0x20
 133 #define FP_EX_OVERFLOW          0x10
 134 #define FP_EX_UNDERFLOW         0x08
 135 #define FP_EX_INEXACT           0x04
 136 #define FP_EX_ALL \
 137         (FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
 138          | FP_EX_INEXACT)
 139
 140 #define FP_EX_ENABLE_SHIFT      5
 141 #define FP_EX_CAUSE_SHIFT       10
 142
 143 #define FP_RND_NEAREST          0x0
 144 #define FP_RND_ZERO             0x1
 145 #define FP_RND_PINF             0x2
 146 #define FP_RND_MINF             0x3
 147 #define FP_RND_MASK             0x3
 148
 149 #define _FP_DECL_EX \
 150   unsigned long int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST
 151
 152 #define FP_INIT_ROUNDMODE                       \
 153   do {                                          \
 154     _fcsr = __builtin_mips_get_fcsr ();         \
 155   } while (0)
 156
 157 #define FP_ROUNDMODE (_fcsr & FP_RND_MASK)
 158
 159 #define FP_TRAPPING_EXCEPTIONS ((_fcsr >> FP_EX_ENABLE_SHIFT) & FP_EX_ALL)
 160
 161 #define FP_HANDLE_EXCEPTIONS                            \
 162   do {                                                  \
 163     _fcsr &= ~(FP_EX_ALL << FP_EX_CAUSE_SHIFT);         \
 164     /* Also clear Unimplemented Operation.  */          \
 165     _fcsr &= ~(1 << 17);                                \
 166     _fcsr |= _fex | (_fex << FP_EX_CAUSE_SHIFT);        \
 167     __builtin_mips_set_fcsr (_fcsr);                    \
 168   } while (0);
 169
 170 #else
 171 #define FP_EX_INVALID           (1 << 4)
 172 #define FP_EX_DIVZERO           (1 << 3)
 173 #define FP_EX_OVERFLOW          (1 << 2)
 174 #define FP_EX_UNDERFLOW         (1 << 1)
 175 #define FP_EX_INEXACT           (1 << 0)
 176 #endif
 177
 178 #define _FP_TININESS_AFTER_ROUNDING 1
 179
 180 #define __LITTLE_ENDIAN 1234
 181 #define __BIG_ENDIAN    4321
 182
 183 #if defined _MIPSEB
 184 # define __BYTE_ORDER __BIG_ENDIAN
 185 #else
 186 # define __BYTE_ORDER __LITTLE_ENDIAN
 187 #endif
 188
 189 /* Define ALIASNAME as a strong alias for NAME.  */
 190 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
 191 # define _strong_alias(name, aliasname) \
 192   extern __typeof (name) aliasname __attribute__ ((alias (#name)));