Floating-point number utility functions
Functions | |
| OSREAL | rtxGetMinusInfinity (void) |
| OSREAL | rtxGetMinusZero (void) |
| OSREAL | rtxGetNaN (void) |
| OSREAL | rtxGetPlusInfinity (void) |
| OSBOOL | rtxIsMinusInfinity (OSREAL value) |
| OSBOOL | rtxIsMinusZero (OSREAL value) |
| OSBOOL | rtxIsNaN (OSREAL value) |
| OSBOOL | rtxIsPlusInfinity (OSREAL value) |
| OSBOOL | rtxIsApproximate (OSREAL a, OSREAL b, OSREAL delta) |
| OSBOOL | rtxIsApproximateAbs (OSREAL a, OSREAL b, OSREAL delta) |
Detailed Description
Floating-point utility function provide run-time functions for handling floating-point number types defined within a schema.
Function Documentation
| OSREAL rtxGetMinusInfinity | ( | void | ) |
Returns the IEEE negative infinity value. This is defined as 0xfff0000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.
| OSREAL rtxGetMinusZero | ( | void | ) |
Returns the IEEE minus zero value. This is defined as 0x8000000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.
| OSREAL rtxGetNaN | ( | void | ) |
Returns the IEEE Not-A-Number (NaN) value. This is defined as 0x7ff8000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.
| OSREAL rtxGetPlusInfinity | ( | void | ) |
Returns the IEEE posative infinity value. This is defined as 0x7ff0000000000000 in IEEE standard 754. We assume the presence of the IEEE double type, that is, 64-bits of precision.
| OSBOOL rtxIsApproximate | ( | OSREAL | a, | |
| OSREAL | b, | |||
| OSREAL | delta | |||
| ) |
A utility function that return TRUE when first number are approximate to second number with given precision.
- Parameters:
-
a The input real value. b The input real value. delta difference must be low than delta * a 1E-7 - set best precision for float; 1E-15 - set best precision for double.
| OSBOOL rtxIsApproximateAbs | ( | OSREAL | a, | |
| OSREAL | b, | |||
| OSREAL | delta | |||
| ) |
A utility function that return TRUE when first number are approximate to second number with given absolute precision.
- Parameters:
-
a The input real value. b The input real value. delta difference must be low than delta
| OSBOOL rtxIsMinusInfinity | ( | OSREAL | value | ) |
A utility function that compares the given input value to the IEEE 754 value for negative infinity.
- Parameters:
-
value The input real value.
| OSBOOL rtxIsMinusZero | ( | OSREAL | value | ) |
A utility function that compares the given input value to the IEEE 754 value for minus zero.
- Parameters:
-
value The input real value.
| OSBOOL rtxIsNaN | ( | OSREAL | value | ) |
A utility function that compares the given input value to the IEEE 754 value for Not-A-Number (NaN).
- Parameters:
-
value The input real value.
| OSBOOL rtxIsPlusInfinity | ( | OSREAL | value | ) |
A utility function that compares the given input value to the IEEE 754 value for positive infinity.
- Parameters:
-
value The input real value.