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Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1#ifndef _ASM_X86_RMWcc
2#define _ASM_X86_RMWcc
3
4#if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CC_HAVE_ASM_GOTO)
5
6/* Use asm goto */
7
8#define __GEN_RMWcc(fullop, var, cc, ...) \
9do { \
10 asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \
11 : : "m" (var), ## __VA_ARGS__ \
12 : "memory" : cc_label); \
13 return 0; \
14cc_label: \
15 return 1; \
16} while (0)
17
18#define GEN_UNARY_RMWcc(op, var, arg0, cc) \
19 __GEN_RMWcc(op " " arg0, var, cc)
20
21#define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \
22 __GEN_RMWcc(op " %1, " arg0, var, cc, vcon (val))
23
24#else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */
25
26/* Use flags output or a set instruction */
27
28#define __GEN_RMWcc(fullop, var, cc, ...) \
29do { \
30 bool c; \
31 asm volatile (fullop ";" CC_SET(cc) \
32 : "+m" (var), CC_OUT(cc) (c) \
33 : __VA_ARGS__ : "memory"); \
34 return c; \
35} while (0)
36
37#define GEN_UNARY_RMWcc(op, var, arg0, cc) \
38 __GEN_RMWcc(op " " arg0, var, cc)
39
40#define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \
41 __GEN_RMWcc(op " %2, " arg0, var, cc, vcon (val))
42
43#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */
44
45#endif /* _ASM_X86_RMWcc */