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Reference
_chkdouble_
_chkfloat_
_crol_
_cror_
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_irol_
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_lror_
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Appendix
Math Routines
The math routines perform common mathematical calculations. Most of these routines work with floating-point values and include the floating-point libraries and support routines.
All of these routines are implemented as functions. Most are prototyped in the math.h include file. The rand and srand functions are prototyped in the stdlib.h include file.
The _chkfloat_, _crol_, _cror_, _irol_, _iror_, _lrol_, and _lror_ functions are prototyped in the intrins.h include file.
| Routine | Attributes | Description |
|---|---|---|
| acos | reentrant | Calculates the arc cosine of a specified number. |
| asin | reentrant | Calculates the arc sine of a specified number. |
| atan | reentrant | Calculates the arc tangent of a specified number. |
| atan2 | reentrant | Calculates the arc tangent of a fraction. |
| ceil | reentrant | Finds the integer ceiling of a specified number. |
| _chkdouble_ | intrinsic, reentrant |
Checks the status of double precision numbers. |
| _chkfloat_ | intrinsic, reentrant |
Checks the status of float numbers. |
| cos | reentrant | Calculates the cosine of a specified number. |
| cosh | reentrant | Calculates the hyperbolic cosine of a specified number. |
| _crol_ | intrinsic, reentrant |
Rotates an unsigned char left a specified number of bits. |
| _cror_ | intrinsic, reentrant |
Rotates an unsigned char right a specified number of bits. |
| exp | reentrant | Calculates the exponential function of a specified number. |
| fabs | reentrant | Finds the absolute value of a specified number. |
| floor | reentrant | Finds the largest integer less than or equal to a specified number. |
| _irol_ | intrinsic, reentrant |
Rotates an unsigned int left a specified number of bits. |
| _iror_ | intrinsic, reentrant |
Rotates an unsigned int right a specified number of bits. |
| log | reentrant | Calculates the natural logarithm of a specified number. |
| log10 | reentrant | Calculates the common logarithm of a specified number. |
| _irol_ | intrinsic, reentrant |
Rotates an unsigned int left a specified number of bits. |
| _lror_ | intrinsic, reentrant |
Rotates an unsigned int right a specified number of bits. |
| modf | reentrant | Generates integer and fractional components of a specified number. |
| pow | reentrant | Calculates a value raised to a power. |
| rand | reentrant | Generates a pseudo random number. |
| sin | reentrant | Calculates the sine of a specified number. |
| sinh | reentrant | Calculates the hyperbolic sine of a specified number. |
| sqrt | reentrant | Calculates the square root of a specified number. |
| srand | reentrant | Initializes the pseudo random number generator. |
| tan | reentrant | Calculates the tangent of a specified number. |
| tanh | reentrant | Calculates the hyperbolic tangent of a specified number. |
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