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Add abs() macro to return absolute value

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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>
This commit is contained in:
Simon Glass 2012-05-10 11:37:35 +00:00 committed by Albert ARIBAUD
parent 3ddecfc740
commit a35925b8c1
3 changed files with 25 additions and 7 deletions
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2
arch/arm/cpu/armv7/omap4/clocks.c
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@ -46,8 +46,6 @@
#define puts(s) #define puts(s)
#endif #endif
#define abs(x) (((x) < 0) ? ((x)*-1) : (x))
struct omap4_prcm_regs *const prcm = (struct omap4_prcm_regs *)0x4A004100; struct omap4_prcm_regs *const prcm = (struct omap4_prcm_regs *)0x4A004100;
const u32 sys_clk_array[8] = { const u32 sys_clk_array[8] = {

5
drivers/bios_emulator/x86emu/prim_ops.c
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@ -118,11 +118,6 @@ static u32 x86emu_parity_tab[8] =
#define PARITY(x) (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0) #define PARITY(x) (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0)
#define XOR2(x) (((x) ^ ((x)>>1)) & 0x1) #define XOR2(x) (((x) ^ ((x)>>1)) & 0x1)
/*----------------------------- Implementation ----------------------------*/
int abs(int v)
{
return (v>0)?v:-v;
}
/*----------------------------- Implementation ----------------------------*/ /*----------------------------- Implementation ----------------------------*/

25
include/common.h
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@ -222,6 +222,31 @@ typedef void (interrupt_handler_t)(void *);
#define MIN(x, y) min(x, y) #define MIN(x, y) min(x, y)
#define MAX(x, y) max(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) #if defined(CONFIG_ENV_IS_EMBEDDED)
#define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN #define TOTAL_MALLOC_LEN CONFIG_SYS_MALLOC_LEN
#elif ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \ #elif ( ((CONFIG_ENV_ADDR+CONFIG_ENV_SIZE) < CONFIG_SYS_MONITOR_BASE) || \