Names:
quad,
QD
rounding to the nearest IEEE 754 quad (binary128).
Library names:
sollya_obj_t sollya_lib_quad(sollya_obj_t)
sollya_obj_t sollya_lib_quad_obj()
int sollya_lib_is_quad_obj(sollya_obj_t)
sollya_obj_t sollya_lib_build_function_quad(sollya_obj_t)
#define SOLLYA_QD(x) sollya_lib_build_function_quad(x)
Description:
- quad is both a function and a constant.
- As a function, it rounds its argument to the nearest IEEE 754 quad precision (i.e. IEEE754-2008 binary128) 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 quad precision format. It is used in
contexts when a precision format is necessary, e.g. in the commands
round and roundcoefficients. It is not supported for implementpoly.
See the corresponding help pages for examples.
Example 1:
> display=binary!;
> QD(0.1);
1.100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001100110011001101_2 * 2^(-4)
> QD(4.17);
1.000010101110000101000111101011100001010001111010111000010100011110101110000101000111101011100001010001111010111_2 * 2^(2)
> QD(1.011_2 * 2^(-16493));
1.1_2 * 2^(-16493)
See also: halfprecision,
single,
double,
doubleextended,
doubledouble,
tripledouble,
roundcoefficients,
implementpoly,
fpminimax,
round,
printsingle
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