sysdeps/or1k/sfp-machine.h

   1 /* OpenRISC softfloat definitions.
   2    Copyright (C) 2022-2023 Free Software Foundation, Inc.
   3
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library.  If not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #define _FP_W_TYPE_SIZE         32
  21 #define _FP_W_TYPE              unsigned long
  22 #define _FP_WS_TYPE             signed long
  23 #define _FP_I_TYPE              long
  24
  25 #define _FP_MUL_MEAT_S(R,X,Y)                           \
  26   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  27 #define _FP_MUL_MEAT_D(R,X,Y)                           \
  28   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  29 #define _FP_MUL_MEAT_Q(R,X,Y)                           \
  30   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  31
  32 #define _FP_MUL_MEAT_DW_S(R,X,Y)                                \
  33   _FP_MUL_MEAT_DW_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  34 #define _FP_MUL_MEAT_DW_D(R,X,Y)                                \
  35   _FP_MUL_MEAT_DW_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  36 #define _FP_MUL_MEAT_DW_Q(R,X,Y)                                \
  37   _FP_MUL_MEAT_DW_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  38
  39
  40 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_loop(S,R,X,Y)
  41 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_2_udiv(D,R,X,Y)
  42 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_4_udiv(Q,R,X,Y)
  43
  44 #define _FP_NANFRAC_S           ((_FP_QNANBIT_S << 1) - 1)
  45 #define _FP_NANFRAC_D           ((_FP_QNANBIT_D << 1) - 1), -1
  46 #define _FP_NANFRAC_Q           ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
  47 #define _FP_NANSIGN_S           0
  48 #define _FP_NANSIGN_D           0
  49 #define _FP_NANSIGN_Q           0
  50
  51 #define _FP_KEEPNANFRACP 1
  52 #define _FP_QNANNEGATEDP 0
  53
  54 /* Someone please check this.  */
  55 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  56   do {                                                          \
  57     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
  58         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
  59       {                                                         \
  60         R##_s = Y##_s;                                          \
  61         _FP_FRAC_COPY_##wc(R,Y);                                \
  62       }                                                         \
  63     else                                                        \
  64       {                                                         \
  65         R##_s = X##_s;                                          \
  66         _FP_FRAC_COPY_##wc(R,X);                                \
  67       }                                                         \
  68     R##_c = FP_CLS_NAN;                                         \
  69   } while (0)
  70
  71 /* Handle getting and setting rounding mode for soft fp operations.  */
  72
  73 #define FP_RND_NEAREST          (0x0 << 1)
  74 #define FP_RND_ZERO             (0x1 << 1)
  75 #define FP_RND_PINF             (0x2 << 1)
  76 #define FP_RND_MINF             (0x3 << 1)
  77 #define FP_RND_MASK             (0x3 << 1)
  78
  79 #define FP_EX_OVERFLOW          (1 << 3)
  80 #define FP_EX_UNDERFLOW         (1 << 4)
  81 #define FP_EX_INEXACT           (1 << 8)
  82 #define FP_EX_INVALID           (1 << 9)
  83 #define FP_EX_DIVZERO           (1 << 11)
  84 #define FP_EX_ALL \
  85         (FP_EX_INVALID | FP_EX_DIVZERO | FP_EX_OVERFLOW | FP_EX_UNDERFLOW \
  86          | FP_EX_INEXACT)
  87
  88 #define _FP_DECL_EX \
  89   unsigned int _fpcsr __attribute__ ((unused)) = FP_RND_NEAREST
  90
  91 #define FP_ROUNDMODE (_fpcsr & FP_RND_MASK)
  92
  93 #define _FP_TININESS_AFTER_ROUNDING 0