diff options
Diffstat (limited to 'lib/igt_aux.h')
| -rw-r--r-- | lib/igt_aux.h | 48 |
1 files changed, 33 insertions, 15 deletions
diff --git a/lib/igt_aux.h b/lib/igt_aux.h index bf57ccf5..30b175d7 100644 --- a/lib/igt_aux.h +++ b/lib/igt_aux.h @@ -40,6 +40,8 @@ #include <i915/gem_submission.h> +#include "igt_core.h" + /* signal interrupt helpers */ #ifdef __linux__ # ifndef HAVE_GETTID @@ -212,26 +214,42 @@ void intel_require_files(uint64_t count); #define CHECK_RAM 0x1 #define CHECK_SWAP 0x2 -#define min(a, b) ({ \ - typeof(a) _a = (a); \ - typeof(b) _b = (b); \ - _a < _b ? _a : _b; \ -}) -#define max(a, b) ({ \ - typeof(a) _a = (a); \ - typeof(b) _b = (b); \ - _a > _b ? _a : _b; \ -}) +#define __typecheck(x, y) \ + (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) -#define clamp(x, min, max) ({ \ - typeof(min) _min = (min); \ - typeof(max) _max = (max); \ - typeof(x) _x = (x); \ - _x < _min ? _min : _x > _max ? _max : _x; \ +#define __cmp(x, y, op) ((x) op (y) ? (x) : (y)) + +#define __cmp_once(x, y, unique_x, unique_y, op) ({ \ + typeof(x) unique_x = (x); \ + typeof(y) unique_y = (y); \ + __cmp(unique_x, unique_y, op); \ }) +#define __is_constexpr(x) \ + (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) + +#define __no_side_effects(x, y) \ + (__is_constexpr(x) && __is_constexpr(y)) + +#define __safe_cmp(x, y) \ + (__typecheck(x, y) && __no_side_effects(x, y)) + +#define __careful_cmp(x, y, op, prefix) \ + __builtin_choose_expr(__safe_cmp(x, y), \ + __cmp(x, y, op), \ + __cmp_once(x, y, igt_unique(igt_tokencat(prefix, __x)), igt_unique(igt_tokencat(prefix, __y)), op)) + +#define min(x, y) __careful_cmp(x, y, <, min) +#define max(x, y) __careful_cmp(x, y, >, max) + +#define clamp(val, lo, hi) min(max(val, lo), hi) + +#define min_t(t, x, y) __careful_cmp((typeof(t))x, (typeof(t))y, <, min_t) +#define max_t(t, x, y) __careful_cmp((typeof(t))x, (typeof(t))y, >, max_t) + #define igt_swap(a, b) do { \ typeof(a) _tmp = (a); \ + _Static_assert(__typecheck(a, b), "type mismatch for swap"); \ (a) = (b); \ (b) = _tmp; \ } while (0) |