https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122129

            Bug ID: 122129
           Summary: DEC_EVAL_METHOD not match constants
           Product: gcc
           Version: 15.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: tydeman at tybor dot com
  Target Milestone: ---

/* Prereq: dnf install libdfp-devel */
#define __STDC_WANT_DEC_FP__ 1
#define __STDC_WANT_IEC_60559_DFP_EXT__ 1

#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <errno.h>
#include <fenv.h>
#include <float.h>
#include <math.h>

#pragma STDC FENV_ACCESS ON
#pragma STDC FP_CONTRACT OFF
#pragma STDC FENV_ROUND FE_TONEAREST
#pragma STDC FENV_DEC_ROUND FE_DEC_TONEAREST
#pragma STDC CX_LIMITED_RANGE OFF

int main(void){

  if(1){
    _Decimal128 dfp37a = 1e300DL;
    _Decimal128 dfp37b = 1e300DD;
    _Decimal128 dfp37c = 1e300DF;       /* not infinity */
    assert( 2 == DEC_EVAL_METHOD );
    assert( dfp37a == dfp37b );
    assert( dfp37b == dfp37c ); /* fails here */
  }
  return 0;
}

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