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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
0c44c2d0 PZ |
2 | #ifndef _ASM_X86_RMWcc |
3 | #define _ASM_X86_RMWcc | |
4 | ||
288e4521 PZ |
5 | /* This counts to 12. Any more, it will return 13th argument. */ |
6 | #define __RMWcc_ARGS(_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10, _11, _12, _n, X...) _n | |
7 | #define RMWcc_ARGS(X...) __RMWcc_ARGS(, ##X, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0) | |
8 | ||
9 | #define __RMWcc_CONCAT(a, b) a ## b | |
10 | #define RMWcc_CONCAT(a, b) __RMWcc_CONCAT(a, b) | |
11 | ||
700b7c54 | 12 | #define __CLOBBERS_MEM(clb...) "memory", ## clb |
df340524 | 13 | |
e9666d10 | 14 | #if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CONFIG_CC_HAS_ASM_GOTO) |
ba741e35 PA |
15 | |
16 | /* Use asm goto */ | |
0c44c2d0 | 17 | |
288e4521 PZ |
18 | #define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \ |
19 | ({ \ | |
20 | bool c = false; \ | |
18fe5822 | 21 | asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ |
288e4521 | 22 | : : [var] "m" (_var), ## __VA_ARGS__ \ |
df340524 | 23 | : clobbers : cc_label); \ |
288e4521 PZ |
24 | if (0) { \ |
25 | cc_label: c = true; \ | |
26 | } \ | |
27 | c; \ | |
28 | }) | |
0c44c2d0 | 29 | |
e9666d10 | 30 | #else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CONFIG_CC_HAS_ASM_GOTO) */ |
ba741e35 PA |
31 | |
32 | /* Use flags output or a set instruction */ | |
0c44c2d0 | 33 | |
288e4521 PZ |
34 | #define __GEN_RMWcc(fullop, _var, cc, clobbers, ...) \ |
35 | ({ \ | |
117780ee | 36 | bool c; \ |
3c52b5c6 | 37 | asm volatile (fullop CC_SET(cc) \ |
288e4521 | 38 | : [var] "+m" (_var), CC_OUT(cc) (c) \ |
df340524 | 39 | : __VA_ARGS__ : clobbers); \ |
288e4521 PZ |
40 | c; \ |
41 | }) | |
df340524 | 42 | |
e9666d10 | 43 | #endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CONFIG_CC_HAS_ASM_GOTO) */ |
df340524 | 44 | |
288e4521 | 45 | #define GEN_UNARY_RMWcc_4(op, var, cc, arg0) \ |
700b7c54 | 46 | __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM()) |
df340524 | 47 | |
288e4521 PZ |
48 | #define GEN_UNARY_RMWcc_3(op, var, cc) \ |
49 | GEN_UNARY_RMWcc_4(op, var, cc, "%[var]") | |
0c44c2d0 | 50 | |
288e4521 PZ |
51 | #define GEN_UNARY_RMWcc(X...) RMWcc_CONCAT(GEN_UNARY_RMWcc_, RMWcc_ARGS(X))(X) |
52 | ||
53 | #define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0) \ | |
54 | __GEN_RMWcc(op " %[val], " arg0, var, cc, \ | |
55 | __CLOBBERS_MEM(), [val] vcon (_val)) | |
56 | ||
57 | #define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val) \ | |
58 | GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]") | |
59 | ||
60 | #define GEN_BINARY_RMWcc(X...) RMWcc_CONCAT(GEN_BINARY_RMWcc_, RMWcc_ARGS(X))(X) | |
61 | ||
62 | #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...) \ | |
63 | __GEN_RMWcc(op " %[var]\n\t" suffix, var, cc, \ | |
64 | __CLOBBERS_MEM(clobbers)) | |
0c44c2d0 | 65 | |
288e4521 PZ |
66 | #define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, cc, vcon, _val, clobbers...)\ |
67 | __GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc, \ | |
68 | __CLOBBERS_MEM(clobbers), [val] vcon (_val)) | |
0c44c2d0 PZ |
69 | |
70 | #endif /* _ASM_X86_RMWcc */ |