diff options
Diffstat (limited to 'payloads/libpayload/include/libpayload.h')
| -rw-r--r-- | payloads/libpayload/include/libpayload.h | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/payloads/libpayload/include/libpayload.h b/payloads/libpayload/include/libpayload.h index 0b9ab0dcd5e7..3a84b3b03827 100644 --- a/payloads/libpayload/include/libpayload.h +++ b/payloads/libpayload/include/libpayload.h @@ -66,10 +66,32 @@ #include <pci.h> #include <archive.h> -#define MIN(a,b) ((a) < (b) ? (a) : (b)) -#define MAX(a,b) ((a) > (b) ? (a) : (b)) +/* Double-evaluation unsafe min/max, for bitfields and outside of functions */ +#define __CMP_UNSAFE(a, b, op) ((a) op (b) ? (a) : (b)) +#define MIN_UNSAFE(a, b) __CMP_UNSAFE(a, b, <) +#define MAX_UNSAFE(a, b) __CMP_UNSAFE(a, b, >) + +#define __CMP_SAFE(a, b, op, var_a, var_b) ({ \ + __TYPEOF_UNLESS_CONST(a, b) var_a = (a); \ + __TYPEOF_UNLESS_CONST(b, a) var_b = (b); \ + var_a op var_b ? var_a : var_b; \ +}) + +#define __CMP(a, b, op) __builtin_choose_expr( \ + __builtin_constant_p(a) && __builtin_constant_p(b), \ + __CMP_UNSAFE(a, b, op), __CMP_SAFE(a, b, op, __TMPNAME, __TMPNAME)) + +#define MIN(a, b) __CMP(a, b, <) +#define MAX(a, b) __CMP(a, b, >) + #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0])) +#define DIV_ROUND_UP(x, y) ({ \ + typeof(x) _div_local_x = (x); \ + typeof(y) _div_local_y = (y); \ + (_div_local_x + _div_local_y - 1) / _div_local_y; \ +}) + static inline u32 div_round_up(u32 n, u32 d) { return (n + d - 1) / d; } #define LITTLE_ENDIAN 1234 |