diff options
Diffstat (limited to 'firmware/export/system.h')
-rw-r--r-- | firmware/export/system.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/firmware/export/system.h b/firmware/export/system.h index c7f5a8112c..f26b3d7f56 100644 --- a/firmware/export/system.h +++ b/firmware/export/system.h @@ -97,6 +97,11 @@ int get_cpu_boost_counter(void); #define MAX(a, b) (((a)>(b))?(a):(b)) #endif +#ifndef SGN +#define SGN(a) \ + ({ typeof (a) ___a = (a); (___a > 0) - (___a < 0); }) +#endif + /* return number of elements in array a */ #define ARRAYLEN(a) (sizeof(a)/sizeof((a)[0])) |