Function testSpecialCases

numeric_types/half.cpp:88–177

}

void testSpecialCases() {
  half h;
  char message[512];

  // Zero
  h.data = 0x0000;
  snprintf(message, sizeof(message), "0x0000 correctly converted to 0.0f");
  printResult(halfToFloat(h) == 0.0f, message, 0.0f, halfToFloat(h));

  // Negative zero
  h.data = 0x8000;
  snprintf(message, sizeof(message), "0x8000 correctly converted to -0.0f");
  printResult(halfToFloat(h) == -0.0f, message, -0.0f, halfToFloat(h));

  // Infinity
  h.data = 0x7c00;
  snprintf(message, sizeof(message), "0x7c00 correctly converted to positive infinity");
  printResult(isinf(halfToFloat(h)) && halfToFloat(h) > 0, message, INFINITY,
              halfToFloat(h));

  // Negative infinity
  h.data = 0xfc00;
  snprintf(message, sizeof(message), "0xfc00 correctly converted to negative infinity");
  printResult(isinf(halfToFloat(h)) && halfToFloat(h) < 0, message, -INFINITY,
              halfToFloat(h));

  // NaN
  h.data = 0x7e00;
  snprintf(message, sizeof(message), "0x7e00 correctly converted to NaN");
  printResult(isnan(halfToFloat(h)), message, NAN, halfToFloat(h));

  // Smallest positive normal number
  h.data = 0x0400;
  snprintf(message, sizeof(message), "0x0400 correctly converted to 6.10352e-05f");
  printResult(approximatelyEqual(halfToFloat(h), 6.10352e-05f, EPSILON),
              message, 6.10352e-05f, halfToFloat(h));

  // Largest denormalized number
  h.data = 0x03ff;
  snprintf(message, sizeof(message), "0x03ff correctly converted to 6.09756e-05f");
  printResult(approximatelyEqual(halfToFloat(h), 6.09756e-05f, EPSILON),
              message, 6.09756e-05f, halfToFloat(h));

  // Smallest positive denormalized number
  h.data = 0x0001;
  snprintf(message, sizeof(message), "0x0001 correctly converted to 5.96046e-08f");
  printResult(approximatelyEqual(halfToFloat(h), 5.96046e-08f, EPSILON),
              message, 5.96046e-08f, halfToFloat(h));

  // Zero
  h = halfFromFloat(0.0f);
  snprintf(message, sizeof(message), "0.0f correctly converted to 0x0000");
  printResult(h.data == 0x0000, message, 0.0f, h.data);

  // Negative zero
  h = halfFromFloat(-0.0f);
  snprintf(message, sizeof(message), "-0.0f correctly converted to 0x8000");
  printResult(h.data == 0x8000, message, -0.0f, h.data);