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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-10-12 10:53:29 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-10-12 10:53:29 -0600 |
| commit | e7b8284f85e94b738dff37ae80f0874bb1c32b94 (patch) | |
| tree | d622041fb0102ab6cf74a80d0688e70f51d86af6 /nuttx/include/fixedmath.h | |
| parent | c22f584912f0a49a1d25e4e040baa10419ce7a37 (diff) | |
| download | px4-nuttx-e7b8284f85e94b738dff37ae80f0874bb1c32b94.tar.gz px4-nuttx-e7b8284f85e94b738dff37ae80f0874bb1c32b94.tar.bz2 px4-nuttx-e7b8284f85e94b738dff37ae80f0874bb1c32b94.zip | |
Cosmetic update to comments
Diffstat (limited to 'nuttx/include/fixedmath.h')
| -rw-r--r-- | nuttx/include/fixedmath.h | 56 |
1 files changed, 38 insertions, 18 deletions
diff --git a/nuttx/include/fixedmath.h b/nuttx/include/fixedmath.h index 69bb8394a..e1a778650 100644 --- a/nuttx/include/fixedmath.h +++ b/nuttx/include/fixedmath.h @@ -99,7 +99,7 @@ #define b32MIN 0x8000000000000000 /* Min value of b16_t */ #define ub32MIN 0x0000000000000000 /* Min value of ub16_t */ -/* Conversions between b16 and b8 *****************************************/ +/* Conversions between b32, b16, and b8 ***********************************/ #define b8tob16(b) (((b16_t)(b)) << 8) #define ub8toub16(b) (((ub16_t)(b)) << 8) @@ -173,12 +173,20 @@ #define b16idiv(i,j) (((i)<<16)/j) /* Division of integer, b16 result */ #ifdef CONFIG_HAVE_LONG_LONG -# define b16mulb16(a,b) b32tob16((b32_t)(a)*(b32_t)(b)) /* Muliplication */ -# define ub16mulub16(a,b) ub32toub16((ub32_t)(a)*(ub32_t)(b) -# define b16sqr(a) b16mulb16(a,a) /* Square */ -# define ub16sqr(a) ub16mulub16(a,a) /* Square */ -# define b16divb16(a,b) b16tob32(a)/(b32_t)(b) /* Division */ -# define ub16divub16(a,b) ub16toub32(a)/(ub32_t)(b) +/* Multiplication operators */ + +# define b16mulb16(a,b) b32tob16((b32_t)(a)*(b32_t)(b)) +# define ub16mulub16(a,b) ub32toub16((ub32_t)(a)*(ub32_t)(b)) + +/* Square operators */ + +# define b16sqr(a) b16mulb16(a,a) +# define ub16sqr(a) ub16mulub16(a,a) + +/* Division operators */ + +# define b16divb16(a,b) b32tob16(b16tob32(a)/(b32_t)(b)) +# define ub16divub16(a,b) ub32toub16(ub16toub32(a)/(ub32_t)(b)) #endif /************************************************************************** @@ -195,32 +203,44 @@ typedef uint64_t ub32_t; #endif /************************************************************************** - * Global Functions + * Public Functions **************************************************************************/ #undef EXTERN #if defined(__cplusplus) #define EXTERN extern "C" -extern "C" { +extern "C" +{ #else #define EXTERN extern #endif #ifndef CONFIG_HAVE_LONG_LONG -EXTERN b16_t b16mulb16(b16_t m1, b16_t m2); -EXTERN ub16_t ub16mulub16(ub16_t m1, ub16_t m2); -EXTERN b16_t b16sqr(b16_t a); -EXTERN ub16_t ub16sqr(ub16_t a); -EXTERN b16_t b16divb16(b16_t num, b16_t denom); -EXTERN ub16_t ub16divub16(ub16_t num, ub16_t denom); +/* Multiplication operators */ + +b16_t b16mulb16(b16_t m1, b16_t m2); +ub16_t ub16mulub16(ub16_t m1, ub16_t m2); + +/* Square operators */ + +b16_t b16sqr(b16_t a); +ub16_t ub16sqr(ub16_t a); + +/* Division operators */ + +b16_t b16divb16(b16_t num, b16_t denom); +ub16_t ub16divub16(ub16_t num, ub16_t denom); #endif -EXTERN b16_t b16sin(b16_t rad); -EXTERN b16_t b16cos(b16_t rad); -EXTERN b16_t b16atan2(b16_t y, b16_t x); +/* Trigonometric Functions */ + +b16_t b16sin(b16_t rad); +b16_t b16cos(b16_t rad); +b16_t b16atan2(b16_t y, b16_t x); #undef EXTERN #if defined(__cplusplus) } #endif + #endif /* __INCLUDE_FIXEDMATH_H */ |