include/asm-sparc64/sfp-machine.h

   1 /* Machine-dependent software floating-point definitions.
   2    Sparc64 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) and
   7                   David S. Miller (davem@redhat.com).
   8
   9    The GNU C Library is free software; you can redistribute it and/or
  10    modify it under the terms of the GNU Library General Public License as
  11    published by the Free Software Foundation; either version 2 of the
  12    License, or (at your option) any later version.
  13
  14    The GNU C Library is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17    Library General Public License for more details.
  18
  19    You should have received a copy of the GNU Library General Public
  20    License along with the GNU C Library; see the file COPYING.LIB.  If
  21    not, write to the Free Software Foundation, Inc.,
  22    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  23
  24 #ifndef _SFP_MACHINE_H
  25 #define _SFP_MACHINE_H
  26
  27 #define _FP_W_TYPE_SIZE         64
  28 #define _FP_W_TYPE              unsigned long
  29 #define _FP_WS_TYPE             signed long
  30 #define _FP_I_TYPE              long
  31
  32 #define _FP_MUL_MEAT_S(R,X,Y)                                   \
  33   _FP_MUL_MEAT_1_imm(_FP_WFRACBITS_S,R,X,Y)
  34 #define _FP_MUL_MEAT_D(R,X,Y)                                   \
  35   _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
  36 #define _FP_MUL_MEAT_Q(R,X,Y)                                   \
  37   _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)
  38
  39 #define _FP_DIV_MEAT_S(R,X,Y)   _FP_DIV_MEAT_1_imm(S,R,X,Y,_FP_DIV_HELP_imm)
  40 #define _FP_DIV_MEAT_D(R,X,Y)   _FP_DIV_MEAT_1_udiv_norm(D,R,X,Y)
  41 #define _FP_DIV_MEAT_Q(R,X,Y)   _FP_DIV_MEAT_2_udiv(Q,R,X,Y)
  42
  43 #define _FP_NANFRAC_S           ((_FP_QNANBIT_S << 1) - 1)
  44 #define _FP_NANFRAC_D           ((_FP_QNANBIT_D << 1) - 1)
  45 #define _FP_NANFRAC_Q           ((_FP_QNANBIT_Q << 1) - 1), -1
  46 #define _FP_NANSIGN_S           0
  47 #define _FP_NANSIGN_D           0
  48 #define _FP_NANSIGN_Q           0
  49
  50 #define _FP_KEEPNANFRACP 1
  51
  52 /* If one NaN is signaling and the other is not,
  53  * we choose that one, otherwise we choose X.
  54  */
  55 /* For _Qp_* and _Q_*, this should prefer X, for
  56  * CPU instruction emulation this should prefer Y.
  57  * (see SPAMv9 B.2.2 section).
  58  */
  59 #define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  60   do {                                                          \
  61     if ((_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs)          \
  62         && !(_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs))     \
  63       {                                                         \
  64         R##_s = X##_s;                                          \
  65         _FP_FRAC_COPY_##wc(R,X);                                \
  66       }                                                         \
  67     else                                                        \
  68       {                                                         \
  69         R##_s = Y##_s;                                          \
  70         _FP_FRAC_COPY_##wc(R,Y);                                \
  71       }                                                         \
  72     R##_c = FP_CLS_NAN;                                         \
  73   } while (0)
  74
  75 /* Obtain the current rounding mode. */
  76 #ifndef FP_ROUNDMODE
  77 #define FP_ROUNDMODE    ((current_thread_info()->xfsr[0] >> 30) & 0x3)
  78 #endif
  79
  80 /* Exception flags. */
  81 #define FP_EX_INVALID           (1 << 4)
  82 #define FP_EX_OVERFLOW          (1 << 3)
  83 #define FP_EX_UNDERFLOW         (1 << 2)
  84 #define FP_EX_DIVZERO           (1 << 1)
  85 #define FP_EX_INEXACT           (1 << 0)
  86
  87 #define FP_HANDLE_EXCEPTIONS return _fex
  88
  89 #define FP_INHIBIT_RESULTS ((current_thread_info()->xfsr[0] >> 23) & _fex)
  90
  91 #define FP_TRAPPING_EXCEPTIONS ((current_thread_info()->xfsr[0] >> 23) & 0x1f)
  92
  93 #endif