diff options
Diffstat (limited to 'arch/x86/include/asm/rmwcc.h')
| -rw-r--r-- | arch/x86/include/asm/rmwcc.h | 37 |
1 files changed, 24 insertions, 13 deletions
diff --git a/arch/x86/include/asm/rmwcc.h b/arch/x86/include/asm/rmwcc.h index 661dd305694a..045f99211a99 100644 --- a/arch/x86/include/asm/rmwcc.h +++ b/arch/x86/include/asm/rmwcc.h @@ -1,45 +1,56 @@ #ifndef _ASM_X86_RMWcc #define _ASM_X86_RMWcc +#define __CLOBBERS_MEM "memory" +#define __CLOBBERS_MEM_CC_CX "memory", "cc", "cx" + #if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CC_HAVE_ASM_GOTO) /* Use asm goto */ -#define __GEN_RMWcc(fullop, var, cc, ...) \ +#define __GEN_RMWcc(fullop, var, cc, clobbers, ...) \ do { \ asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ - : : "m" (var), ## __VA_ARGS__ \ - : "memory" : cc_label); \ + : : [counter] "m" (var), ## __VA_ARGS__ \ + : clobbers : cc_label); \ return 0; \ cc_label: \ return 1; \ } while (0) -#define GEN_UNARY_RMWcc(op, var, arg0, cc) \ - __GEN_RMWcc(op " " arg0, var, cc) +#define __BINARY_RMWcc_ARG " %1, " -#define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \ - __GEN_RMWcc(op " %1, " arg0, var, cc, vcon (val)) #else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ /* Use flags output or a set instruction */ -#define __GEN_RMWcc(fullop, var, cc, ...) \ +#define __GEN_RMWcc(fullop, var, cc, clobbers, ...) \ do { \ bool c; \ asm volatile (fullop ";" CC_SET(cc) \ - : "+m" (var), CC_OUT(cc) (c) \ - : __VA_ARGS__ : "memory"); \ + : [counter] "+m" (var), CC_OUT(cc) (c) \ + : __VA_ARGS__ : clobbers); \ return c; \ } while (0) +#define __BINARY_RMWcc_ARG " %2, " + +#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ + #define GEN_UNARY_RMWcc(op, var, arg0, cc) \ - __GEN_RMWcc(op " " arg0, var, cc) + __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM) + +#define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, arg0, cc) \ + __GEN_RMWcc(op " " arg0 "\n\t" suffix, var, cc, \ + __CLOBBERS_MEM_CC_CX) #define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \ - __GEN_RMWcc(op " %2, " arg0, var, cc, vcon (val)) + __GEN_RMWcc(op __BINARY_RMWcc_ARG arg0, var, cc, \ + __CLOBBERS_MEM, vcon (val)) -#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ +#define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, vcon, val, arg0, cc) \ + __GEN_RMWcc(op __BINARY_RMWcc_ARG arg0 "\n\t" suffix, var, cc, \ + __CLOBBERS_MEM_CC_CX, vcon (val)) #endif /* _ASM_X86_RMWcc */ |