Release 4.14 arch/x86/include/asm/rmwcc.h

/* SPDX-License-Identifier: GPL-2.0 */
#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, clobbers, ...)			\
do {                                                                    \
        asm_volatile_goto (fullop "; j" #cc " %l[cc_label]"             \
                        : : [counter] "m" (var), ## __VA_ARGS__         \
                        : clobbers : cc_label);                         \
        return 0;                                                       \
cc_label:                                                               \
        return 1;                                                       \
} while (0)


#define __BINARY_RMWcc_ARG	" %1, "


#else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */

/* Use flags output or a set instruction */


#define __GEN_RMWcc(fullop, var, cc, clobbers, ...)			\
do {                                                                    \
        bool c;                                                         \
        asm volatile (fullop ";" CC_SET(cc)                             \
                        : [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, __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 __BINARY_RMWcc_ARG arg0, var, cc,                \
                    __CLOBBERS_MEM, vcon (val))


#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 */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
68
46.58%
1
20.00%
Kees Cook
61
41.78%
1
20.00%
H. Peter Anvin
16
10.96%
2
40.00%
Greg Kroah-Hartman
1
0.68%
1
20.00%
Total
146
100.00%
5
100.00%
Directory: arch/x86/include/asm

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