kc3-lang/libffi/testsuite/libffi.call/float2.c

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• Hash : 09f9d856
  Author :
  Date : 2019-10-09T16:26:06
  

  Making the change to correct the comment when SUN (#521) and GCC are used together

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• testsuite/libffi.call/float2.c

• /* Area:	ffi_call
     Purpose:	Check return value long double.
     Limitations:	none.
     PR:		none.
     Originator:	From the original ffitest.c  */
  /* { dg-do run } */
  
  #include "ffitest.h"
  #include "float.h"
  
  #include <math.h>
  
  static long double ldblit(float f)
  {
    return (long double) (((long double) f)/ (long double) 3.0);
  }
  
  int main (void)
  {
    ffi_cif cif;
    ffi_type *args[MAX_ARGS];
    void *values[MAX_ARGS];
    float f;
    long double ld;
    long double original;
  
    args[0] = &ffi_type_float;
    values[0] = &f;
  
    /* Initialize the cif */
    CHECK(ffi_prep_cif(&cif, FFI_DEFAULT_ABI, 1,
  		     &ffi_type_longdouble, args) == FFI_OK);
  
    f = 3.14159;
  
  #if defined(__sun) && defined(__GNUC__)
    /* long double support under SunOS/gcc is pretty much non-existent.
       You'll get the odd bus error in library routines like printf() */
  #else
    printf ("%Lf\n", ldblit(f));
  #endif
  
    ld = 666;
    ffi_call(&cif, FFI_FN(ldblit), &ld, values);
  
  #if defined(__sun) && defined(__GNUC__)
    /* long double support under SunOS/gcc is pretty much non-existent.
       You'll get the odd bus error in library routines like printf() */
  #else
    printf ("%Lf, %Lf, %Lf, %Lf\n", ld, ldblit(f), ld - ldblit(f), LDBL_EPSILON);
  #endif
  
    /* These are not always the same!! Check for a reasonable delta */
    original = ldblit(f);
    if (((ld > original) ? (ld - original) : (original - ld)) < LDBL_EPSILON)
      puts("long double return value tests ok!");
    else
      CHECK(0);
  
    exit(0);
  }
  

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