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The DEC VAX supported operations on 128-bit integer ('O' or octaword) and 128-bit floating-point ('H-float' or HFLOAT) datatypes. Support for such operations was an upgrade option rather than being a standard feature. Since the VAX's registers were 32 bits wide, a 128-bit operation used four consecutive registers or four longwords in memory.
It is therefore the maximum value for variables declared as integers (e.g., as int) in many programming languages. The data type time_t, used on operating systems such as Unix, is a signed integer counting the number of seconds since the start of the Unix epoch (midnight UTC of 1 January 1970), and is often implemented as a 32-bit integer. [8]
IPv6 uses 128-bit (16-byte) addresses; Any bit with a binary prefix is 128 bytes of a lesser binary prefix value, such as 1 gibibit is 128 mebibytes; 128-bit integers, memory addresses, or other data units are those that are at most 128 bits 16 octets wide; All 128 possible states of the seven-segment display. Seven-segment displays have 128 ...
128-bit: Quadruple (binary128), ... Another is in situations where artificial limits and overflows would be ... a sixteen-bit integer is certainly adequate as it ...
The minimum size for char is 8 bits, the minimum size for short and int is 16 bits, for long it is 32 bits and long long must contain at least 64 bits. The type int should be the integer type that the target processor is most efficiently working with. This allows great flexibility: for example, all types can be 64-bit.
The sign bit determines the sign of the number (including when this number is zero, which is signed), "1" stands for negative.; The exponent bits encode a binary integer from 0 up to 32767, from which a 'bias' of 16383 is subtracted to get the 'effective exponent' between -16382 and +16383.
A signed 32-bit integer variable has a maximum value of 2 31 − 1 = 2,147,483,647, ... Integers between 2 127 and 2 128 round to a multiple of 2 104;
If the 2 bits after the sign bit are "11", then the 14-bit exponent field is shifted 2 bits to the right (after both the sign bit and the "11" bits thereafter), and the represented significand is in the remaining 111 bits. In this case there is an implicit (that is, not stored) leading 3-bit sequence "100" in the true significand.