mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 07:05:36 +07:00
ba741e356c
Change the GEN_*_RMWcc() macros to use the CC_SET()/CC_OUT() macros defined in <asm/asm.h>, and disable the use of asm goto if __GCC_ASM_FLAG_OUTPUTS__ is enabled. This allows gcc to receive the flags output directly in gcc 6+. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Link: http://lkml.kernel.org/r/1465414726-197858-6-git-send-email-hpa@linux.intel.com Reviewed-by: Andy Lutomirski <luto@kernel.org> Reviewed-by: Borislav Petkov <bp@suse.de> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
#ifndef _ASM_X86_RMWcc
|
|
#define _ASM_X86_RMWcc
|
|
|
|
#if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CC_HAVE_ASM_GOTO)
|
|
|
|
/* Use asm goto */
|
|
|
|
#define __GEN_RMWcc(fullop, var, cc, ...) \
|
|
do { \
|
|
asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \
|
|
: : "m" (var), ## __VA_ARGS__ \
|
|
: "memory" : 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 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, ...) \
|
|
do { \
|
|
bool c; \
|
|
asm volatile (fullop ";" CC_SET(cc) \
|
|
: "+m" (var), CC_OUT(cc) (c) \
|
|
: __VA_ARGS__ : "memory"); \
|
|
return c; \
|
|
} while (0)
|
|
|
|
#define GEN_UNARY_RMWcc(op, var, arg0, cc) \
|
|
__GEN_RMWcc(op " " arg0, var, cc)
|
|
|
|
#define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \
|
|
__GEN_RMWcc(op " %2, " arg0, var, cc, vcon (val))
|
|
|
|
#endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */
|
|
|
|
#endif /* _ASM_X86_RMWcc */
|