libgcc/config/aarch64/sfp-machine.h

   1 /* Machine description for AArch64 architecture.
   2    Copyright (C) 2009-2018 Free Software Foundation, Inc.
   3    Contributed by ARM Ltd.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 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 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  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 /* The type of the result of a floating point comparison.  This must
  36    match __libgcc_cmp_return__ in GCC for the target.  */
  37 typedef int __gcc_CMPtype __attribute__ ((mode (__libgcc_cmp_return__)));
  38 #define CMPtype __gcc_CMPtype
  39
  40 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  41   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  42
  43 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
  44
  45 #define _FP_NANFRAC_H           ((_FP_QNANBIT_H << 1) - 1)
  46 #define _FP_NANFRAC_S           ((_FP_QNANBIT_S << 1) - 1)
  47 #define _FP_NANFRAC_D           ((_FP_QNANBIT_D << 1) - 1)
  48 #define _FP_NANFRAC_Q           ((_FP_QNANBIT_Q << 1) - 1), -1
  49 #define _FP_NANSIGN_H           0
  50 #define _FP_NANSIGN_S           0
  51 #define _FP_NANSIGN_D           0
  52 #define _FP_NANSIGN_Q           0
  53
  54 #define _FP_KEEPNANFRACP 1
  55 #define _FP_QNANNEGATEDP 0
  56
  57 /* This appears to be in line with the VFP conventions in the v7-a
  58    ARM-ARM. Need to check with the v8 version.  */
  59 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  60   do {                                                          \
  61     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
  62         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
  63       {                                                         \
  64         R##_s = Y##_s;                                          \
  65         _FP_FRAC_COPY_##wc(R,Y);                                \
  66       }                                                         \
  67     else                                                        \
  68       {                                                         \
  69         R##_s = X##_s;                                          \
  70         _FP_FRAC_COPY_##wc(R,X);                                \
  71       }                                                         \
  72     R##_c = FP_CLS_NAN;                                         \
  73   } while (0)
  74
  75 #define FP_EX_INVALID   0x01
  76 #define FP_EX_DIVZERO   0x02
  77 #define FP_EX_OVERFLOW  0x04
  78 #define FP_EX_UNDERFLOW 0x08
  79 #define FP_EX_INEXACT   0x10
  80 #define FP_EX_SHIFT 8
  81 #define FP_EX_ALL \
  82         (FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
  83          | FP_EX_INEXACT)
  84
  85 #define _FP_TININESS_AFTER_ROUNDING 0
  86
  87 void __sfp_handle_exceptions (int);
  88
  89 #define FP_HANDLE_EXCEPTIONS                    \
  90   do {                                          \
  91     if (__builtin_expect (_fex, 0))             \
  92       __sfp_handle_exceptions (_fex);           \
  93   } while (0)
  94
  95 #define FP_TRAPPING_EXCEPTIONS ((_fpcr >> FP_EX_SHIFT) & FP_EX_ALL)
  96
  97 #define FP_RND_NEAREST          0x000000
  98 #define FP_RND_PINF             0x400000
  99 #define FP_RND_MINF             0x800000
 100 #define FP_RND_ZERO             0xc00000
 101 #define FP_RND_MASK             0xc00000
 102
 103 #define _FP_DECL_EX \
 104   unsigned long int _fpcr __attribute__ ((unused)) = FP_RND_NEAREST
 105
 106 #define FP_INIT_ROUNDMODE                       \
 107   do {                                          \
 108     __asm__ __volatile__ ("mrs  %0, fpcr"       \
 109                           : "=r" (_fpcr));      \
 110   } while (0)
 111
 112 #define FP_ROUNDMODE (_fpcr & FP_RND_MASK)
 113
 114 #define __LITTLE_ENDIAN 1234
 115 #define __BIG_ENDIAN    4321
 116
 117 #if defined __AARCH64EB__
 118 # define __BYTE_ORDER __BIG_ENDIAN
 119 #else
 120 # define __BYTE_ORDER __LITTLE_ENDIAN
 121 #endif
 122
 123
 124 /* Define ALIASNAME as a strong alias for NAME.  */
 125 # define strong_alias(name, aliasname) _strong_alias(name, aliasname)
 126 # define _strong_alias(name, aliasname) \
 127   extern __typeof (name) aliasname __attribute__ ((alias (#name)));