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| /* SPDX-License-Identifier: GPL-2.0 */
| #ifndef _ASM_X86_RMWcc
| #define _ASM_X86_RMWcc
|
| /* This counts to 12. Any more, it will return 13th argument. */
| #define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n
| #define RMWcc_ARGS(X...) __RMWcc_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
|
| #define __RMWcc_CONCAT(a, b) a ## b
| #define RMWcc_CONCAT(a, b) __RMWcc_CONCAT(a, b)
|
| #define __CLOBBERS_MEM(clb...) "memory", ## clb
|
| #if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CONFIG_CC_HAS_ASM_GOTO)
|
| /* Use asm goto */
|
| #define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \
| ({ \
| bool c = false; \
| asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \
| : : [var] "m" (_var), ## __VA_ARGS__ \
| : clobbers : cc_label); \
| if (0) { \
| cc_label: c = true; \
| } \
| c; \
| })
|
| #else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CONFIG_CC_HAS_ASM_GOTO) */
|
| /* Use flags output or a set instruction */
|
| #define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \
| ({ \
| bool c; \
| asm volatile (fullop CC_SET(cc) \
| : [var] "+m" (_var), CC_OUT(cc) (c) \
| : __VA_ARGS__ : clobbers); \
| c; \
| })
|
| #endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CONFIG_CC_HAS_ASM_GOTO) */
|
| #define GEN_UNARY_RMWcc_4(op, var, cc, arg0) \
| __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM())
|
| #define GEN_UNARY_RMWcc_3(op, var, cc) \
| GEN_UNARY_RMWcc_4(op, var, cc, "%[var]")
|
| #define GEN_UNARY_RMWcc(X...) RMWcc_CONCAT(GEN_UNARY_RMWcc_, RMWcc_ARGS(X))(X)
|
| #define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0) \
| __GEN_RMWcc(op " %[val], " arg0, var, cc, \
| __CLOBBERS_MEM(), [val] vcon (_val))
|
| #define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val) \
| GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]")
|
| #define GEN_BINARY_RMWcc(X...) RMWcc_CONCAT(GEN_BINARY_RMWcc_, RMWcc_ARGS(X))(X)
|
| #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...) \
| __GEN_RMWcc(op " %[var]\n\t" suffix, var, cc, \
| __CLOBBERS_MEM(clobbers))
|
| #define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, cc, vcon, _val, clobbers...)\
| __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc, \
| __CLOBBERS_MEM(clobbers), [val] vcon (_val))
|
| #endif /* _ASM_X86_RMWcc */
|
|
