mirror of https://gitee.com/openkylin/linux.git
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
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#ifndef _ASM_X86_RMWcc
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#define _ASM_X86_RMWcc
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#ifdef CC_HAVE_ASM_GOTO
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#define __GEN_RMWcc(fullop, var, cc, ...) \
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do { \
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asm volatile goto (fullop "; j" cc " %l[cc_label]" \
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: : "m" (var), ## __VA_ARGS__ \
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: "memory" : cc_label); \
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return 0; \
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cc_label: \
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return 1; \
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} while (0)
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#define GEN_UNARY_RMWcc(op, var, arg0, cc) \
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__GEN_RMWcc(op " " arg0, var, cc)
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#define GEN_BINARY_RMWcc(op, var, val, arg0, cc) \
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__GEN_RMWcc(op " %1, " arg0, var, cc, "er" (val))
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#else /* !CC_HAVE_ASM_GOTO */
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#define __GEN_RMWcc(fullop, var, cc, ...) \
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do { \
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char c; \
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asm volatile (fullop "; set" cc " %1" \
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: "+m" (var), "=qm" (c) \
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: __VA_ARGS__ : "memory"); \
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return c != 0; \
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} while (0)
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#define GEN_UNARY_RMWcc(op, var, arg0, cc) \
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__GEN_RMWcc(op " " arg0, var, cc)
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#define GEN_BINARY_RMWcc(op, var, val, arg0, cc) \
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__GEN_RMWcc(op " %2, " arg0, var, cc, "er" (val))
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#endif /* CC_HAVE_ASM_GOTO */
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#endif /* _ASM_X86_RMWcc */
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