Quelle  sfp-machine.h   Sprache: C

/* SPDX-License-Identifier: GPL-2.0+
 *
 * Machine-dependent software floating-point definitions.
   SuperH kernel version.
   Copyright (C) 1997,1998,1999 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Richard Henderson (rth@cygnus.com),
  Jakub Jelinek (jj@ultra.linux.cz),
  David S. Miller (davem@redhat.com) and
  Peter Maydell (pmaydell@chiark.greenend.org.uk).
*/

#ifndef _SFP_MACHINE_H
#define _SFP_MACHINE_H

#ifdef __BIG_ENDIAN__
#define __BYTE_ORDER __BIG_ENDIAN
#define __LITTLE_ENDIAN 0
#else
#define __BYTE_ORDER __LITTLE_ENDIAN
#define __BIG_ENDIAN 0
#endif

#define _FP_W_TYPE_SIZE  32
#define _FP_W_TYPE  unsigned long
#define _FP_WS_TYPE  signed long
#define _FP_I_TYPE  long

#define _FP_MUL_MEAT_S(R,X,Y)     \
  _FP_MUL_MEAT_1_wide(_FP_WFRACBITS_S,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_D(R,X,Y)     \
  _FP_MUL_MEAT_2_wide(_FP_WFRACBITS_D,R,X,Y,umul_ppmm)
#define _FP_MUL_MEAT_Q(R,X,Y)     \
  _FP_MUL_MEAT_4_wide(_FP_WFRACBITS_Q,R,X,Y,umul_ppmm)

#define _FP_DIV_MEAT_S(R,X,Y) _FP_DIV_MEAT_1_udiv(S,R,X,Y)
#define _FP_DIV_MEAT_D(R,X,Y) _FP_DIV_MEAT_2_udiv(D,R,X,Y)
#define _FP_DIV_MEAT_Q(R,X,Y) _FP_DIV_MEAT_4_udiv(Q,R,X,Y)

#define _FP_NANFRAC_S  ((_FP_QNANBIT_S << 1) - 1)
#define _FP_NANFRAC_D  ((_FP_QNANBIT_D << 1) - 1), -1
#define _FP_NANFRAC_Q  ((_FP_QNANBIT_Q << 1) - 1), -1, -1, -1
#define _FP_NANSIGN_S  0
#define _FP_NANSIGN_D  0
#define _FP_NANSIGN_Q  0

#define _FP_KEEPNANFRACP 1

/*
 * If one NaN is signaling and the other is not,
 * we choose that one, otherwise we choose X.
 */
#define _FP_CHOOSENAN(fs, wc, R, X, Y, OP)                      \
  do {                                                          \
    if ((_FP_FRAC_HIGH_RAW_##fs(X) & _FP_QNANBIT_##fs)          \
        && !(_FP_FRAC_HIGH_RAW_##fs(Y) & _FP_QNANBIT_##fs))     \
      {                                                         \
        R##_s = Y##_s;                                          \
        _FP_FRAC_COPY_##wc(R,Y);                                \
      }                                                         \
    else                                                        \
      {                                                         \
        R##_s = X##_s;                                          \
        _FP_FRAC_COPY_##wc(R,X);                                \
      }                                                         \
    R##_c = FP_CLS_NAN;                                         \
  } while (0)

//#define FP_ROUNDMODE FPSCR_RM
#define FP_DENORM_ZERO  1/*FPSCR_DN*/

/* Exception flags. */
#define FP_EX_INVALID  (1<<4)
#define FP_EX_DIVZERO  (1<<3)
#define FP_EX_OVERFLOW  (1<<2)
#define FP_EX_UNDERFLOW  (1<<1)
#define FP_EX_INEXACT  (1<<0)

#endif