| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #ifndef _ASM_X86_RMWcc |
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| 3 | #define _ASM_X86_RMWcc |
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| 4 | |
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| 5 | #include <linux/args.h> |
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| 6 | |
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| 7 | #define __CLOBBERS_MEM(clb...) "memory", ## clb |
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| 8 | |
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| 9 | #define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \ |
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| 10 | ({ \ |
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| 11 | bool c; \ |
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| 12 | asm_inline volatile (fullop \ |
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| 13 | : [var] "+m" (_var), "=@cc" #cc (c) \ |
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| 14 | : __VA_ARGS__ : clobbers); \ |
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| 15 | c; \ |
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| 16 | }) |
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| 17 | |
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| 18 | #define GEN_UNARY_RMWcc_4(op, var, cc, arg0) \ |
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| 19 | __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM()) |
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| 20 | |
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| 21 | #define GEN_UNARY_RMWcc_3(op, var, cc) \ |
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| 22 | GEN_UNARY_RMWcc_4(op, var, cc, "%[var]") |
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| 23 | |
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| 24 | #define GEN_UNARY_RMWcc(X...) CONCATENATE(GEN_UNARY_RMWcc_, COUNT_ARGS(X))(X) |
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| 25 | |
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| 26 | #define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0) \ |
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| 27 | __GEN_RMWcc(op " %[val], " arg0, var, cc, \ |
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| 28 | __CLOBBERS_MEM(), [val] vcon (_val)) |
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| 29 | |
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| 30 | #define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val) \ |
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| 31 | GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]") |
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| 32 | |
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| 33 | #define GEN_BINARY_RMWcc(X...) CONCATENATE(GEN_BINARY_RMWcc_, COUNT_ARGS(X))(X) |
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| 34 | |
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| 35 | #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...) \ |
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| 36 | __GEN_RMWcc(op " %[var]\n\t" suffix, var, cc, \ |
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| 37 | __CLOBBERS_MEM(clobbers)) |
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| 38 | |
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| 39 | #define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, cc, vcon, _val, clobbers...)\ |
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| 40 | __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc, \ |
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| 41 | __CLOBBERS_MEM(clobbers), [val] vcon (_val)) |
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| 42 | |
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| 43 | #endif /* _ASM_X86_RMWcc */ |
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| 44 | |
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