blob: 6b19413b47a6e16e966f641640bbf45dc9e36c07 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
#ifndef __LINUX_COMPILER_H
#define __LINUX_COMPILER_H
/* Somewhere in the middle of the GCC 2.96 development cycle, we implemented
a mechanism by which the user can annotate likely branch directions and
expect the blocks to be reordered appropriately. Define __builtin_expect
to nothing for earlier compilers. */
#if __GNUC__ == 2 && __GNUC_MINOR__ < 96
#define __builtin_expect(x, expected_value) (x)
#endif
#define likely(x) __builtin_expect((x),1)
#define unlikely(x) __builtin_expect((x),0)
/* This macro obfuscates arithmetic on a variable address so that gcc
shouldn't recognize the original var, and make assumptions about it */
#define RELOC_HIDE(ptr, off) \
({ unsigned long __ptr; \
__asm__ ("" : "=g"(__ptr) : "0"(ptr)); \
(typeof(ptr)) (__ptr + (off)); })
#endif /* __LINUX_COMPILER_H */
|
