diff options
| author | Simon Glass <sjg@chromium.org> | 2012-05-10 11:37:35 +0000 |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2012-05-15 08:31:37 +0200 |
| commit | a35925b8c10c99a7020bfcda74c8a6c72ed90cf5 (patch) | |
| tree | 897969251fd788554a574d944fc173cb61891b2c /include/common.h | |
| parent | 3ddecfc74086aa185a2f671cc07cb826b72d35f0 (diff) | |
Add abs() macro to return absolute value
This macro is generally useful to make it available in common.
Signed-off-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Warren <twarren@nvidia.com>
Acked-by: Tom Rini <trini@ti.com>
Acked-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'include/common.h')
| -rw-r--r-- | include/common.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/common.h b/include/common.h index 4b5841ef4..ff7126d35 100644 --- a/include/common.h +++ b/include/common.h @@ -222,6 +222,31 @@ typedef void (interrupt_handler_t)(void *); #define MIN(x, y) min(x, y) #define MAX(x, y) max(x, y) +/* + * Return the absolute value of a number. + * + * This handles unsigned and signed longs, ints, shorts and chars. For all + * input types abs() returns a signed long. + * + * For 64-bit types, use abs64() + */ +#define abs(x) ({ \ + long ret; \ + if (sizeof(x) == sizeof(long)) { \ + long __x = (x); \ + ret = (__x < 0) ? -__x : __x; \ + } else { \ + int __x = (x); \ + ret = (__x < 0) ? -__x : __x; \ + } \ + ret; \ + }) + +#define abs64(x) ({ \ + s64 __x = (x); \ + (__x < 0) ? -__x : __x; \ + }) + #if defined(CONFIG_ENV_IS_EMBEDDED) #define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN #elif ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \ |