LXR linux/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#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
  85