llvm/compiler-rt/test/builtins/Unit/floatditf_test.c

// RUN: %clang_builtins %s %librt -o %t && %run %t
// REQUIRES: librt_has_floatditf

#include "int_lib.h"
#include <complex.h>
#include <math.h>
#include <stdio.h>

// The testcase currently assumes IEEE TF format, once that has been
// fixed the defined(CRT_HAS_IEEE_TF) guard can be removed to enable it for
// IBM 128 floats as well.
#if defined(CRT_HAS_IEEE_TF)

#  include "fp_test.h"

// Returns: long integer converted to tf_float

COMPILER_RT_ABI tf_float __floatditf(di_int a);

int test__floatditf(di_int a, uint64_t expectedHi, uint64_t expectedLo) {
  tf_float x = __floatditf(a);
  int ret = compareResultF128(x, expectedHi, expectedLo);

  if (ret)
    printf("error in __floatditf(%Ld) = %.20Lf, "
           "expected %.20Lf\n",
           a, x, fromRep128(expectedHi, expectedLo));
  return ret;
}

char assumption_1[sizeof(long double) * CHAR_BIT == 128] = {0};

#endif

int main() {
#if defined(CRT_HAS_IEEE_TF)
  if (test__floatditf(0x7fffffffffffffff, UINT64_C(0x403dffffffffffff),
                      UINT64_C(0xfffc000000000000)))
    return 1;
  if (test__floatditf(0x123456789abcdef1, UINT64_C(0x403b23456789abcd),
                      UINT64_C(0xef10000000000000)))
    return 1;
  if (test__floatditf(0x2, UINT64_C(0x4000000000000000), UINT64_C(0x0)))
    return 1;
  if (test__floatditf(0x1, UINT64_C(0x3fff000000000000), UINT64_C(0x0)))
    return 1;
  if (test__floatditf(0x0, UINT64_C(0x0), UINT64_C(0x0)))
    return 1;
  if (test__floatditf(0xffffffffffffffff, UINT64_C(0xbfff000000000000),
                      UINT64_C(0x0)))
    return 1;
  if (test__floatditf(0xfffffffffffffffe, UINT64_C(0xc000000000000000),
                      UINT64_C(0x0)))
    return 1;
  if (test__floatditf(-0x123456789abcdef1, UINT64_C(0xc03b23456789abcd),
                      UINT64_C(0xef10000000000000)))
    return 1;
  if (test__floatditf(0x8000000000000000, UINT64_C(0xc03e000000000000),
                      UINT64_C(0x0)))
    return 1;

#else
  printf("skipped\n");

#endif
  return 0;
}