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/* Basic test of runtime equality comparisons using simple values that

   are not affected by rounding.  */

#include <stdlib.h>

static int failcnt;

#define PASTE2(A,B) A ## B

#define PASTE(A,B) PASTE2(A,B)

#ifdef DBG

#include <stdio.h>

#define FAILURE(OP,KIND) \

  { printf ("failed at line %d: %s for %s values\n", __LINE__, OP, KIND); \

    failcnt++; }

#else

#define FAILURE(OP,KIND) abort ();

#endif

#ifndef WIDTH

#error define WIDTH as decimal float size in bytes

#endif

#if WIDTH == 32

#define DTYPE _Decimal32

#define SUFFIX DF

#elif WIDTH == 64

#define DTYPE _Decimal64

#define SUFFIX DD

#elif WIDTH == 128

#define DTYPE _Decimal128

#define SUFFIX DL

#elif WIDTH == 0

/* This is for testing the test using a type known to work.  */

#define DTYPE double

#define SUFFIX

#else

#error invalid width for decimal float type

#endif

DTYPE m_two = PASTE(-2.0, SUFFIX);

DTYPE m_one = PASTE(-1.0, SUFFIX);

DTYPE zero  = PASTE(0.0, SUFFIX);

DTYPE one   = PASTE(1.0, SUFFIX);

DTYPE two   = PASTE(2.0, SUFFIX);

void

test_compares (void)

{

  DTYPE x = one;

  DTYPE y = zero;

  DTYPE z = m_one;

  /* Equal to: comparisons against equal values.  */

  if (! (x == one))   FAILURE ("==", "equal")

  if (! (y == zero))  FAILURE ("==", "equal")

  if (! (z == m_one)) FAILURE ("==", "equal")

  /* Equal to: comparisons against lesser values.  */

  if (x == m_one)     FAILURE ("==", "lesser")

  if (x == zero)      FAILURE ("==", "lesser")

  if (y == m_one)     FAILURE ("==", "lesser")

  if (z == m_two)     FAILURE ("==", "lesser")

  /* Equal to: comparisons against greater values.  */

  if (x == two)       FAILURE ("==", "greater")

  if (y == one)       FAILURE ("==", "greater")

  if (z == zero)      FAILURE ("==", "greater")

  if (z == one)       FAILURE ("==", "greater")

  /* Not equal to: comparisons against equal values.  */

  if (x != one)        FAILURE ("!=", "equal")

  if (y != zero)       FAILURE ("!=", "equal")

  if (z != m_one)      FAILURE ("!=", "equal")

  /* Not equal to: comparisons against lesser values.  */

  if (! (x != m_one))  FAILURE ("!=", "lesser")

  if (! (x != zero))   FAILURE ("!=", "lesser")

  if (! (y != m_one))  FAILURE ("!=", "lesser")

  if (! (z != m_two))  FAILURE ("!=", "lesser")

  /* Not equal to: comparisons against greater values.  */

  if (! (x != m_one)) FAILURE ("!=", "greater")

  if (! (x != zero))  FAILURE ("!=", "greater")

  if (! (y != m_one)) FAILURE ("!=", "greater")

  if (! (z != m_two)) FAILURE ("!=", "greater")

  if (failcnt)

    abort ();

}