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significand(3) Library Functions Manual significand(3)
significand, significandf, significandl - get mantissa of floating-point number
Math library (libm, -lm)
#include <math.h> double significand(double x); float significandf(float x); long double significandl(long double x); Feature Test Macro Requirements for glibc (see feature_test_macros(7)): significand(), significandf(), significandl(): /* Since glibc 2.19: */ _DEFAULT_SOURCE || /* glibc <= 2.19: */ _BSD_SOURCE || _SVID_SOURCE
These functions return the mantissa of x scaled to the range [1,2). They are equivalent to scalb(x, (double) -ilogb(x)) This function exists mainly for use in certain standardized tests for IEEE 754 conformance.
For an explanation of the terms used in this section, see attributes(7). ┌─────────────────────────────────────┬───────────────┬─────────┐ │ Interface │ Attribute │ Value │ ├─────────────────────────────────────┼───────────────┼─────────┤ │ significand(), significandf(), │ Thread safety │ MT-Safe │ │ significandl() │ │ │ └─────────────────────────────────────┴───────────────┴─────────┘
None. significand() BSD.
significand() BSD.
ilogb(3), scalb(3)
Linux man-pages (unreleased) (date) significand(3)
Pages that refer to this page: ilogb(3)