From: Simon Glass <sjg@chromium.org>
Date: Thu, 10 May 2012 11:37:35 +0000 (+0000)
Subject: Add abs() macro to return absolute value
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a35925b8c10c99a7020bfcda74c8a6c72ed90cf5;p=project%2Fbcm63xx%2Fu-boot.git

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>
---

diff --git a/arch/arm/cpu/armv7/omap4/clocks.c b/arch/arm/cpu/armv7/omap4/clocks.c
index dd694c409f..3f0dfd7275 100644
--- a/arch/arm/cpu/armv7/omap4/clocks.c
+++ b/arch/arm/cpu/armv7/omap4/clocks.c
@@ -46,8 +46,6 @@
 #define puts(s)
 #endif
 
-#define abs(x) (((x) < 0) ? ((x)*-1) : (x))
-
 struct omap4_prcm_regs *const prcm = (struct omap4_prcm_regs *)0x4A004100;
 
 const u32 sys_clk_array[8] = {
diff --git a/drivers/bios_emulator/x86emu/prim_ops.c b/drivers/bios_emulator/x86emu/prim_ops.c
index 7553087b26..5f6c795fb7 100644
--- a/drivers/bios_emulator/x86emu/prim_ops.c
+++ b/drivers/bios_emulator/x86emu/prim_ops.c
@@ -118,11 +118,6 @@ static u32 x86emu_parity_tab[8] =
 
 #define PARITY(x)   (((x86emu_parity_tab[(x) / 32] >> ((x) % 32)) & 1) == 0)
 #define XOR2(x)	    (((x) ^ ((x)>>1)) & 0x1)
-/*----------------------------- Implementation ----------------------------*/
-int abs(int v)
-{
-	return (v>0)?v:-v;
-}
 
 /*----------------------------- Implementation ----------------------------*/
 
diff --git a/include/common.h b/include/common.h
index 4b5841ef47..ff7126d35d 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) || \