Names:
double,
D
rounding to the nearest IEEE 754 double (binary64).
Library names:
sollya_obj_t sollya_lib_double(sollya_obj_t)
sollya_obj_t sollya_lib_double_obj()
int sollya_lib_is_double_obj(sollya_obj_t)
sollya_obj_t sollya_lib_build_function_double(sollya_obj_t)
#define SOLLYA_D(x) sollya_lib_build_function_double(x)
Description:
- double is both a function and a constant.
- As a function, it rounds its argument to the nearest IEEE 754 double precision (i.e. IEEE754-2008 binary64) number.
Subnormal numbers are supported as well as standard numbers: it is the real
rounding described in the standard.
- As a constant, it symbolizes the double precision format. It is used in
contexts when a precision format is necessary, e.g. in the commands
round, roundcoefficients and implementpoly.
See the corresponding help pages for examples.
Example 1:
> display=binary!;
> D(0.1);
1.100110011001100110011001100110011001100110011001101_2 * 2^(-4)
> D(4.17);
1.000010101110000101000111101011100001010001111010111_2 * 2^(2)
> D(1.011_2 * 2^(-1073));
1.1_2 * 2^(-1073)
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