kc3-lang/gnulib/lib/setpayload.c

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• Hash : dbc692b7
  Author :
  Date : 2024-04-19T02:14:41
  

  setpayload*: Support newer MIPS CPUs.
  
  * lib/setpayload.c (setpayload): On MIPS CPUs with MIPS_NAN2008_DOUBLE,
  accept a zero payload.
  * lib/setpayloadf.c (setpayloadf): On MIPS CPUs with MIPS_NAN2008_FLOAT,
  accept a zero payload.
  * lib/setpayloadl.c (setpayloadl): On MIPS CPUs with
  MIPS_NAN2008_LONG_DOUBLE, accept a zero payload.
  * m4/setpayload.m4 (gl_FUNC_SETPAYLOADF, gl_FUNC_SETPAYLOAD,
  gl_FUNC_SETPAYLOADL): Invoke gl_NAN_MIPS.
  * modules/setpayload (Files): Add m4/nan-mips.m4.
  * modules/setpayloadf (Files): Likewise.
  * modules/setpayloadl (Files): Likewise.
  

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• lib/setpayload.c

• /* Construct a quiet NaN 'double' with a given payload.
     Copyright 2024 Free Software Foundation, Inc.
  
     This file is free software: you can redistribute it and/or modify
     it under the terms of the GNU Lesser General Public License as
     published by the Free Software Foundation, either version 3 of the
     License, or (at your option) any later version.
  
     This file is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU Lesser General Public License for more details.
  
     You should have received a copy of the GNU Lesser General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  /* Written by Bruno Haible.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include <math.h>
  
  #include <float.h>
  #include <stdint.h>
  
  #include "signed-nan.h"
  
  int
  setpayload (double *result, double payload)
  {
  #if DBL_MANT_DIG == 53
    if (
  # if defined __hppa || (defined __mips__ && !MIPS_NAN2008_DOUBLE) || defined __sh__
        /* A zero payload is not allowed, because that would denote Infinity.
           Cf. snan.h.  */
        payload > 0.0
  # else
        payload >= 0.0
  # endif
        && payload < 2251799813685248.0 /* (double) (1ULL << (DBL_MANT_DIG - 2)) */
        && payload == (double) (int64_t) payload)
      {
        union { uint64_t i; double f; } x;
        x.f = positive_NaNd ();
        x.i = (x.i & ~(((uint64_t) 1 << (DBL_MANT_DIG - 2)) - 1))
              | (int64_t) payload;
        *result = x.f;
        return 0;
      }
    else
      {
        *result = 0.0;
        return -1;
      }
  #else
  # error "Please port gnulib setpayload.c to your platform!"
  #endif
  }
  

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