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C/C++ Source or Header  |  2008-12-24  |  3.3 KB  |  85 lines
  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.