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/// Gets a hex constant value for a single value in the argument values array in a determistic way
/// * `bits`: The number of bits for the type, only 8, 16, 32, 64 are valid values
/// * `index`: The position in the array we are generating for
pub fn value_for_array(bits: u32, index: u32) -> String {
let index = index as usize;
if bits == 8 {
format!("{:#X}", VALUES_8[index % VALUES_8.len()])
} else if bits == 16 {
format!("{:#X}", VALUES_16[index % VALUES_16.len()])
} else if bits == 32 {
format!("{:#X}", VALUES_32[index % VALUES_32.len()])
} else if bits == 64 {
format!("{:#X}", VALUES_64[index % VALUES_64.len()])
} else {
panic!("Unknown size: {bits}");
}
}
pub const VALUES_8: &[u8] = &[
0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0xf0, 0x80, 0x3b, 0xff,
];
pub const VALUES_16: &[u16] = &[
0x0000, // 0.0
0x0400, // The smallest normal value.
0x37ff, // The value just below 0.5.
0x3800, // 0.5
0x3801, // The value just above 0.5.
0x3bff, // The value just below 1.0.
0x3c00, // 1.0
0x3c01, // The value just above 1.0.
0x3e00, // 1.5
0x4900, // 10
0x7bff, // The largest finite value.
0x7c00, // Infinity.
// NaNs.
// - Quiet NaNs
0x7f23, 0x7e00, // - Signalling NaNs
0x7d23, 0x7c01, // Subnormals.
// - A recognisable bit pattern.
0x0012, // - The largest subnormal value.
0x03ff, // - The smallest subnormal value.
0x0001, // The same values again, but negated.
0x8000, 0x8400, 0xb7ff, 0xb800, 0xb801, 0xbbff, 0xbc00, 0xbc01, 0xbe00, 0xc900, 0xfbff, 0xfc00,
0xff23, 0xfe00, 0xfd23, 0xfc01, 0x8012, 0x83ff, 0x8001,
];
pub const VALUES_32: &[u32] = &[
// Simple values.
0x00000000, // 0.0
0x00800000, // The smallest normal value.
0x3effffff, // The value just below 0.5.
0x3f000000, // 0.5
0x3f000001, // The value just above 0.5.
0x3f7fffff, // The value just below 1.0.
0x3f800000, // 1.0
0x3f800001, // The value just above 1.0.
0x3fc00000, // 1.5
0x41200000, // 10
0x7f8fffff, // The largest finite value.
0x7f800000, // Infinity.
// NaNs.
// - Quiet NaNs
0x7fd23456, 0x7fc00000, // - Signalling NaNs
0x7f923456, 0x7f800001, // Subnormals.
// - A recognisable bit pattern.
0x00123456, // - The largest subnormal value.
0x007fffff, // - The smallest subnormal value.
0x00000001, // The same values again, but negated.
0x80000000, 0x80800000, 0xbeffffff, 0xbf000000, 0xbf000001, 0xbf7fffff, 0xbf800000, 0xbf800001,
0xbfc00000, 0xc1200000, 0xff8fffff, 0xff800000, 0xffd23456, 0xffc00000, 0xff923456, 0xff800001,
0x80123456, 0x807fffff, 0x80000001,
];
pub const VALUES_64: &[u64] = &[
// Simple values.
0x0000000000000000, // 0.0
0x0010000000000000, // The smallest normal value.
0x3fdfffffffffffff, // The value just below 0.5.
0x3fe0000000000000, // 0.5
0x3fe0000000000001, // The value just above 0.5.
0x3fefffffffffffff, // The value just below 1.0.
0x3ff0000000000000, // 1.0
0x3ff0000000000001, // The value just above 1.0.
0x3ff8000000000000, // 1.5
0x4024000000000000, // 10
0x7fefffffffffffff, // The largest finite value.
0x7ff0000000000000, // Infinity.
// NaNs.
// - Quiet NaNs
0x7ff923456789abcd,
0x7ff8000000000000,
// - Signalling NaNs
0x7ff123456789abcd,
0x7ff0000000000000,
// Subnormals.
// - A recognisable bit pattern.
0x000123456789abcd,
// - The largest subnormal value.
0x000fffffffffffff,
// - The smallest subnormal value.
0x0000000000000001,
// The same values again, but negated.
0x8000000000000000,
0x8010000000000000,
0xbfdfffffffffffff,
0xbfe0000000000000,
0xbfe0000000000001,
0xbfefffffffffffff,
0xbff0000000000000,
0xbff0000000000001,
0xbff8000000000000,
0xc024000000000000,
0xffefffffffffffff,
0xfff0000000000000,
0xfff923456789abcd,
0xfff8000000000000,
0xfff123456789abcd,
0xfff0000000000000,
0x800123456789abcd,
0x800fffffffffffff,
0x8000000000000001,
];
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