< Ada Programming < Attributes
Description
X'Machine_Emin is an Ada attribute where X is any floating point type.
Floating point types are represented as:
where
- sign is 1 or -1
- mantissa is a fraction in base radix
- radix is the hardware radix (usually 2)
- exponent is an integer
'Machine_Emin returns the smallest exponent.
Example
with Ada.Text_IO; procedure Machine_Emin is package T_IO renames Ada.Text_IO; package I_IO is new Ada.Text_IO.Integer_IO (Integer); begin T_IO.Put ("Emin of Float type = "); I_IO.Put (Float'Machine_Emin); T_IO.New_Line; T_IO.Put ("Emin of Long_Float type = "); I_IO.Put (Long_Float'Machine_Emin); T_IO.New_Line; end Machine_Emin;
The output with GNAT 4.6 on the x86-64 architecture is:
Emin of Float type = -125 Emin of Long_Float type = -1021
See also
Wikibook
Ada Reference Manual
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