bool isNaN(double x) {
// Wipe out the sign bit
const uint64 y = *(uint64*)(&x) &
((uint64(BIN32(01111111,11111111,11111111,11111111)) << 32) +
0xFFFFFFFF);
// If the remaining number has all of the exponent bits set and atleast one
// fraction bit set, then it is NaN
return (y > (uint64(BIN32(01111111,11110000,00000000,00000000)) << 32));
}
void test_binary_32()
{
TEST_ASSERT_EQUAL_HEX32(0x00000000, BIN32(00000000, 00000000, 00000000, 00000000));
TEST_ASSERT_EQUAL_HEX32(0x0000000f, BIN32(00000000, 00000000, 00000000, 00001111));
TEST_ASSERT_EQUAL_HEX32(0x000000f0, BIN32(00000000, 00000000, 00000000, 11110000));
TEST_ASSERT_EQUAL_HEX32(0x00000f00, BIN32(00000000, 00000000, 00001111, 00000000));
TEST_ASSERT_EQUAL_HEX32(0x0000f000, BIN32(00000000, 00000000, 11110000, 00000000));
TEST_ASSERT_EQUAL_HEX32(0x000f0000, BIN32(00000000, 00001111, 00000000, 00000000));
TEST_ASSERT_EQUAL_HEX32(0x00f00000, BIN32(00000000, 11110000, 00000000, 00000000));
TEST_ASSERT_EQUAL_HEX32(0x0f000000, BIN32(00001111, 00000000, 00000000, 00000000));
TEST_ASSERT_EQUAL_HEX32(0xf0000000, BIN32(11110000, 00000000, 00000000, 00000000));
TEST_ASSERT_EQUAL_HEX32(0xffffffff, BIN32(11111111, 11111111, 11111111, 11111111));
}
bool isNaN(float x) {
// Wipe out the sign bit
const uint32 y = *(uint32*)(&x) & BIN32(01111111,11111111,11111111,11111111);
// If the remaining number has all of the exponent bits set and atleast one
// fraction bit set, then it is NaN
return (y > 0x7F800000);
}