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Added some function attributes when using GCC; these may help the optimizer a bit.

This commit is contained in:
Petteri.Aimonen 2012-01-27 15:06:46 +00:00
parent 03f046b59d
commit eb1cb67561
1 changed files with 32 additions and 21 deletions
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53
libfixmath/fix16.h
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@ -6,6 +6,17 @@ extern "C"
{
#endif
/* These options may let the optimizer to remove some calls to the functions.
* Refer to http://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
*/
#ifndef FIXMATH_FUNC_ATTRS
# ifdef __GNUC__
# define FIXMATH_FUNC_ATTRS __attribute__((leaf, nothrow, pure))
# else
# define FIXMATH_FUNC_ATTRS
# endif
#endif
#include <stdint.h>
typedef int32_t fix16_t;
@ -69,84 +80,84 @@ static inline fix16_t fix16_sub(fix16_t inArg0, fix16_t inArg1) { return (inArg0
#else
extern fix16_t fix16_add(fix16_t a, fix16_t b);
extern fix16_t fix16_sub(fix16_t a, fix16_t b);
extern fix16_t fix16_add(fix16_t a, fix16_t b) FIXMATH_FUNC_ATTRS;
extern fix16_t fix16_sub(fix16_t a, fix16_t b) FIXMATH_FUNC_ATTRS;
/* Saturating arithmetic */
extern fix16_t fix16_sadd(fix16_t a, fix16_t b);
extern fix16_t fix16_ssub(fix16_t a, fix16_t b);
extern fix16_t fix16_sadd(fix16_t a, fix16_t b) FIXMATH_FUNC_ATTRS;
extern fix16_t fix16_ssub(fix16_t a, fix16_t b) FIXMATH_FUNC_ATTRS;
#endif
/*! Multiplies the two given fix16_t's and returns the result.
*/
extern fix16_t fix16_mul(fix16_t inArg0, fix16_t inArg1);
extern fix16_t fix16_mul(fix16_t inArg0, fix16_t inArg1) FIXMATH_FUNC_ATTRS;
/*! Divides the first given fix16_t by the second and returns the result.
*/
extern fix16_t fix16_div(fix16_t inArg0, fix16_t inArg1);
extern fix16_t fix16_div(fix16_t inArg0, fix16_t inArg1) FIXMATH_FUNC_ATTRS;
#ifndef FIXMATH_NO_OVERFLOW
/*! Performs a saturated multiplication (overflow-protected) of the two given fix16_t's and returns the result.
*/
extern fix16_t fix16_smul(fix16_t inArg0, fix16_t inArg1);
extern fix16_t fix16_smul(fix16_t inArg0, fix16_t inArg1) FIXMATH_FUNC_ATTRS;
/*! Performs a saturated division (overflow-protected) of the first fix16_t by the second and returns the result.
*/
extern fix16_t fix16_sdiv(fix16_t inArg0, fix16_t inArg1);
extern fix16_t fix16_sdiv(fix16_t inArg0, fix16_t inArg1) FIXMATH_FUNC_ATTRS;
#endif
/*! Returns the linear interpolation: (inArg0 * (1 - inFract)) + (inArg1 * inFract)
*/
extern fix16_t fix16_lerp8(fix16_t inArg0, fix16_t inArg1, uint8_t inFract);
extern fix16_t fix16_lerp16(fix16_t inArg0, fix16_t inArg1, uint16_t inFract);
extern fix16_t fix16_lerp8(fix16_t inArg0, fix16_t inArg1, uint8_t inFract) FIXMATH_FUNC_ATTRS;
extern fix16_t fix16_lerp16(fix16_t inArg0, fix16_t inArg1, uint16_t inFract) FIXMATH_FUNC_ATTRS;
#ifndef FIXMATH_NO_64BIT
extern fix16_t fix16_lerp32(fix16_t inArg0, fix16_t inArg1, uint32_t inFract);
extern fix16_t fix16_lerp32(fix16_t inArg0, fix16_t inArg1, uint32_t inFract) FIXMATH_FUNC_ATTRS;
#endif
/*! Returns the sine of the given fix16_t.
*/
extern fix16_t fix16_sin_parabola(fix16_t inAngle);
extern fix16_t fix16_sin_parabola(fix16_t inAngle) FIXMATH_FUNC_ATTRS;
/*! Returns the sine of the given fix16_t.
*/
extern fix16_t fix16_sin(fix16_t inAngle);
extern fix16_t fix16_sin(fix16_t inAngle) FIXMATH_FUNC_ATTRS;
/*! Returns the cosine of the given fix16_t.
*/
extern fix16_t fix16_cos(fix16_t inAngle);
extern fix16_t fix16_cos(fix16_t inAngle) FIXMATH_FUNC_ATTRS;
/*! Returns the tangent of the given fix16_t.
*/
extern fix16_t fix16_tan(fix16_t inAngle);
extern fix16_t fix16_tan(fix16_t inAngle) FIXMATH_FUNC_ATTRS;
/*! Returns the arcsine of the given fix16_t.
*/
extern fix16_t fix16_asin(fix16_t inValue);
extern fix16_t fix16_asin(fix16_t inValue) FIXMATH_FUNC_ATTRS;
/*! Returns the arccosine of the given fix16_t.
*/
extern fix16_t fix16_acos(fix16_t inValue);
extern fix16_t fix16_acos(fix16_t inValue) FIXMATH_FUNC_ATTRS;
/*! Returns the arctangent of the given fix16_t.
*/
extern fix16_t fix16_atan(fix16_t inValue);
extern fix16_t fix16_atan(fix16_t inValue) FIXMATH_FUNC_ATTRS;
/*! Returns the arctangent of inY/inX.
*/
extern fix16_t fix16_atan2(fix16_t inY, fix16_t inX);
extern fix16_t fix16_atan2(fix16_t inY, fix16_t inX) FIXMATH_FUNC_ATTRS;
/*! Returns the square root of the given fix16_t.
*/
extern fix16_t fix16_sqrt(fix16_t inValue);
extern fix16_t fix16_sqrt(fix16_t inValue) FIXMATH_FUNC_ATTRS;
/*! Returns the exponent (e^) of the given fix16_t.
*/
extern fix16_t fix16_exp(fix16_t inValue);
extern fix16_t fix16_exp(fix16_t inValue) FIXMATH_FUNC_ATTRS;
#ifdef __cplusplus
}