Not to be confused with arbitrary-precision arithmetic.
Floating-point formats
IEEE 754
16-bit: Half (binary16)
32-bit: Single (binary32), decimal32
64-bit: Double (binary64), decimal64
128-bit: Quadruple (binary128), decimal128
256-bit: Octuple (binary256)
Extended precision
Other
Minifloat
bfloat16
TensorFloat-32
Microsoft Binary Format
IBM floating-point architecture
PMBus Linear-11
G.711 8-bit floats
Alternatives
Arbitrary precision
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Computer architecture bit widths
Bit
1
4
8
12
16
18
24
26
28
30
31
32
36
45
48
60
64
128
256
512
bit slicing
Application
8
16
32
64
Binary floating-point precision
16 (×½)
24
32 (×1)
40
64 (×2)
80
128 (×4)
256 (×8)
Decimal floating-point precision
32
64
128
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e
Extended precision refers to floating-point number formats that provide greater precision than the basic floating-point formats.[1] Extended precision formats support a basic format by minimizing roundoff and overflow errors in intermediate values of expressions on the base format. In contrast to extended precision, arbitrary-precision arithmetic refers to implementations of much larger numeric types (with a storage count that usually is not a power of two) using special software (or, rarely, hardware).
^IEEE 754 (2008, ¶ 2.1.21) defines extended precision format as "A format that extends a supported basic format by providing wider precision and range."
and 17 Related for: Extended precision information
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