·  Home
+   man pages
 -> Linux -> FreeBSD -> OpenBSD -> NetBSD -> Tru64 Unix -> HP-UX 11i -> IRIX
·  Linux HOWTOs
·  FreeBSD Tips
·  *niX Forums

man pages->NetBSD man pages -> ieee_test (3)
 Title
 Content
 Arch
 Section All Sections 1 - General Commands 2 - System Calls 3 - Subroutines 4 - Special Files 5 - File Formats 6 - Games 7 - Macros and Conventions 8 - Maintenance Commands 9 - Kernel Interface n - New Commands

## IEEE_TEST(3)

```
```

### NAME[Toc][Back]

```     logb, logbf, scalb, scalbf, significand, significandf - IEEE test functions

```

### LIBRARY[Toc][Back]

```     Math Library (libm, -lm)
```

### SYNOPSIS[Toc][Back]

```     #include <math.h>

double
logb(double x);

float
logbf(float x);

double
scalb(double x, double n);

float
scalbf(float x, float n);

double
significand(double x);

float
significandf(float x);
```

### DESCRIPTION[Toc][Back]

```     These functions allow users to test conformance to IEEE Std 754-1985.
Their use is not otherwise recommended.

logb(x) returns x's exponent n, a signed integer converted to double-precision
floating-point.  logb(+-infinity) = +infinity; logb(0) = -infinity
with a division by zero exception.

scalbn(x, n) returns x*(2**n) computed by exponent manipulation.

significand(x) returns sig, where x := sig * 2**n with 1 <= sig < 2.
significand(x) is not defined when x is 0, +-infinity, or NaN.
```

```     ieee(3), math(3)
```

### STANDARDS[Toc][Back]

```     IEEE Std 754-1985

BSD                             March 10, 1994                             BSD
```
[ Back ]
Similar pages
 Name OS Title nextafter NetBSD Functions for IEEE arithmetic remainder NetBSD Functions for IEEE arithmetic remainder FreeBSD functions for IEEE arithmetic remainderf FreeBSD functions for IEEE arithmetic ilogb OpenBSD functions for IEEE arithmetic scalbn FreeBSD functions for IEEE arithmetic scalbnf FreeBSD functions for IEEE arithmetic ieee FreeBSD functions for IEEE arithmetic remainderf NetBSD Functions for IEEE arithmetic ilogbf NetBSD Functions for IEEE arithmetic