libgcc/config/nds32/sfp-machine.h

   1 /* Machine settings for software floating-point emulation
   2    of Andes NDS32 cpu for GNU compiler
   3    Copyright (C) 2012-2018 Free Software Foundation, Inc.
   4    Contributed by Andes Technology Corporation.
   5
   6    This file is part of GNU C Library.
   7
   8    The GNU C Library is free software; you can redistribute it and/or
   9    modify it under the terms of the GNU Lesser General Public
  10    License as published by the Free Software Foundation; either
  11    version 2.1 of the License, or (at your option) any later version.
  12
  13    In addition to the permissions in the GNU Lesser General Public
  14    License, the Free Software Foundation gives you unlimited
  15    permission to link the compiled version of this file into
  16    combinations with other programs, and to distribute those
  17    combinations without any restriction coming from the use of this
  18    file.  (The Lesser General Public License restrictions do apply in
  19    other respects; for example, they cover modification of the file,
  20    and distribution when not linked into a combine executable.)
  21
  22    The GNU C Library is distributed in the hope that it will be useful,
  23    but WITHOUT ANY WARRANTY; without even the implied warranty of
  24    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  25    Lesser General Public License for more details.
  26
  27    You should have received a copy of the GNU Lesser General Public
  28    License along with the GNU C Library; if not, see
  29    <http://www.gnu.org/licenses/>.  */
  30
  31 #define _FP_W_TYPE_SIZE         32
  32 #define _FP_W_TYPE              unsigned long
  33 #define _FP_WS_TYPE             signed long
  34 #define _FP_I_TYPE              long
  35
  36 /* The type of the result of a floating point comparison.  This must
  37    match `__libgcc_cmp_return__' in GCC for the target.  */
  38 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
  39 #define CMPtype __gcc_CMPtype
  40
  41 #define _FP_MUL_MEAT_S(R,X,Y)                           \
  42   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  43 #define _FP_MUL_MEAT_D(R,X,Y)                           \
  44   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  45 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  46   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  47
  48 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_loop(S,R,X,Y)
  49 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
  50 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
  51
  52 #define _FP_NANFRAC_S           ((_FP_QNANBIT_S << 1) - 1)
  53 #define _FP_NANFRAC_D           ((_FP_QNANBIT_D << 1) - 1), -1
  54 #define _FP_NANFRAC_Q           ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
  55 #define _FP_NANSIGN_S           0
  56 #define _FP_NANSIGN_D           0
  57 #define _FP_NANSIGN_Q           0
  58
  59 #define _FP_KEEPNANFRACP 1
  60 #define _FP_QNANNEGATEDP 0
  61
  62 /* Someone please check this.  */
  63 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  64   do {                                                          \
  65     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
  66         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
  67       {                                                         \
  68         R##_s = Y##_s;                                          \
  69         _FP_FRAC_COPY_##wc(R,Y);                                \
  70       }                                                         \
  71     else                                                        \
  72       {                                                         \
  73         R##_s = X##_s;                                          \
  74         _FP_FRAC_COPY_##wc(R,X);                                \
  75       }                                                         \
  76     R##_c = FP_CLS_NAN;                                         \
  77   } while (0)
  78
  79 #ifdef NDS32_ABI_2FP_PLUS
  80 #define FP_RND_NEAREST          0x0
  81 #define FP_RND_PINF             0x1
  82 #define FP_RND_MINF             0x2
  83 #define FP_RND_ZERO             0x3
  84 #define FP_RND_MASK             0x3
  85
  86 #define _FP_DECL_EX \
  87   unsigned long int _fcsr __attribute__ ((unused)) = FP_RND_NEAREST
  88
  89 #define FP_INIT_ROUNDMODE                       \
  90   do {                                          \
  91     _fcsr = __builtin_nds32_fmfcsr ();          \
  92   } while (0)
  93
  94 #define FP_ROUNDMODE (_fcsr & FP_RND_MASK)
  95
  96 #endif
  97
  98 /* Not checked.  */
  99 #define _FP_TININESS_AFTER_ROUNDING 0
 100
 101 #define __LITTLE_ENDIAN 1234
 102 #define __BIG_ENDIAN    4321
 103
 104 #if defined __big_endian__
 105 # define __BYTE_ORDER __BIG_ENDIAN
 106 #else
 107 # define __BYTE_ORDER __LITTLE_ENDIAN
 108 #endif
 109
 110 /* Define ALIASNAME as a strong alias for NAME.  */
 111 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
 112 # define _strong_alias(name, aliasname) \
 113   extern __typeof (name) aliasname __attribute__ ((alias (#name)));