arch/sh/include/asm/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 #ifdef __BIG_ENDIAN__
  29 #define __BYTE_ORDER __BIG_ENDIAN
  30 #define __LITTLE_ENDIAN 0
  31 #else
  32 #define __BYTE_ORDER __LITTLE_ENDIAN
  33 #define __BIG_ENDIAN 0
  34 #endif
  35
  36 #define _FP_W_TYPE_SIZE         32
  37 #define _FP_W_TYPE              unsigned long
  38 #define _FP_WS_TYPE             signed long
  39 #define _FP_I_TYPE              long
  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_udiv(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
  61 /*
  62  * If one NaN is signaling and the other is not,
  63  * we choose that one, otherwise we choose X.
  64  */
  65 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  66   do {                                                          \
  67     if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
  68         && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
  69       {                                                         \
  70         R##_s = Y##_s;                                          \
  71         _FP_FRAC_COPY_##wc(R,Y);                                \
  72       }                                                         \
  73     else                                                        \
  74       {                                                         \
  75         R##_s = X##_s;                                          \
  76         _FP_FRAC_COPY_##wc(R,X);                                \
  77       }                                                         \
  78     R##_c = FP_CLS_NAN;                                         \
  79   } while (0)
  80
  81 //#define FP_ROUNDMODE          FPSCR_RM
  82 #define FP_DENORM_ZERO          1/*FPSCR_DN*/
  83
  84 /* Exception flags. */
  85 #define FP_EX_INVALID           (1<<4)
  86 #define FP_EX_DIVZERO           (1<<3)
  87 #define FP_EX_OVERFLOW          (1<<2)
  88 #define FP_EX_UNDERFLOW         (1<<1)
  89 #define FP_EX_INEXACT           (1<<0)
  90
  91 #endif
  92