6 Basics [basic]

6.8 Types [basic.types]

6.8.3 Optional extended floating-point types [basic.extended.fp]

Table 15: Properties of named extended floating-point types [tab:basic.extended.fp]
Parameter
float16_t
float32_t
float64_t
float128_t
bfloat16_t
ISO/IEC/IEEE 60559 name
binary16
binary32
binary64
binary128
k, storage width in bits
16
32
64
128
16
p, precision in bits
11
24
53
113
8
emax, maximum exponent
15
127
1023
16383
127
w, exponent field width in bits
5
8
11
15
8