release/src-rt-6.x/linux/linux-2.6/include/asm-sh/sfp-machine.h

   1 /* Machine-dependent software floating-point definitions.
   2    SuperH kernel version.
   3    Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5    Contributed by Richard Henderson (rth@cygnus.com),
   6                   Jakub Jelinek (jj@ultra.linux.cz),
   7                   David S. Miller (davem@redhat.com) and
   8                   Peter Maydell (pmaydell@chiark.greenend.org.uk).
   9
  10    The GNU C Library is free software; you can redistribute it and/or
  11    modify it under the terms of the GNU Library General Public License as
  12    published by the Free Software Foundation; either version 2 of the
  13    License, or (at your option) any later version.
  14
  15    The GNU C Library is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18    Library General Public License for more details.
  19
  20    You should have received a copy of the GNU Library General Public
  21    License along with the GNU C Library; see the file COPYING.LIB.  If
  22    not, write to the Free Software Foundation, Inc.,
  23    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  24
  25 #ifndef _SFP_MACHINE_H
  26 #define _SFP_MACHINE_H
  27
  28 #define _FP_W_TYPE_SIZE         32
  29 #define _FP_W_TYPE              unsigned long
  30 #define _FP_WS_TYPE             signed long
  31 #define _FP_I_TYPE              long
  32
  33 #define _FP_MUL_MEAT_S(R,X,Y)                                   \
  34   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
  35 #define _FP_MUL_MEAT_D(R,X,Y)                                   \
  36   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  37 #define _FP_MUL_MEAT_Q(R,X,Y)                                   \
  38   _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  39
  40 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_udiv(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
  53 /*
  54  * If one NaN is signaling and the other is not,
  55  * we choose that one, otherwise we choose X.
  56  */
  57 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  58   do {                                                          \
  59     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
  60         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
  61       {                                                         \
  62         R##_s = Y##_s;                                          \
  63         _FP_FRAC_COPY_##wc(R,Y);                                \
  64       }                                                         \
  65     else                                                        \
  66       {                                                         \
  67         R##_s = X##_s;                                          \
  68         _FP_FRAC_COPY_##wc(R,X);                                \
  69       }                                                         \
  70     R##_c = FP_CLS_NAN;                                         \
  71   } while (0)
  72
  73 //#define FP_ROUNDMODE          FPSCR_RM
  74 #define FP_DENORM_ZERO          1/*FPSCR_DN*/
  75
  76 /* Exception flags. */
  77 #define FP_EX_INVALID           (1<<4)
  78 #define FP_EX_DIVZERO           (1<<3)
  79 #define FP_EX_OVERFLOW          (1<<2)
  80 #define FP_EX_UNDERFLOW         (1<<1)
  81 #define FP_EX_INEXACT           (1<<0)
  82
  83 #endif
  84