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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 | ||
df340524 KC |
5 | #define __CLOBBERS_MEM "memory" |
6 | #define __CLOBBERS_MEM_CC_CX "memory", "cc", "cx" | |
7 | ||
ba741e35 PA |
8 | #if !defined(__GCC_ASM_FLAG_OUTPUTS__) && defined(CC_HAVE_ASM_GOTO) |
9 | ||
10 | /* Use asm goto */ | |
0c44c2d0 | 11 | |
df340524 | 12 | #define __GEN_RMWcc(fullop, var, cc, clobbers, ...) \ |
0c44c2d0 | 13 | do { \ |
18fe5822 | 14 | asm_volatile_goto (fullop "; j" #cc " %l[cc_label]" \ |
df340524 KC |
15 | : : [counter] "m" (var), ## __VA_ARGS__ \ |
16 | : clobbers : cc_label); \ | |
0c44c2d0 PZ |
17 | return 0; \ |
18 | cc_label: \ | |
19 | return 1; \ | |
20 | } while (0) | |
21 | ||
df340524 | 22 | #define __BINARY_RMWcc_ARG " %1, " |
0c44c2d0 | 23 | |
0c44c2d0 | 24 | |
ba741e35 PA |
25 | #else /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ |
26 | ||
27 | /* Use flags output or a set instruction */ | |
0c44c2d0 | 28 | |
df340524 | 29 | #define __GEN_RMWcc(fullop, var, cc, clobbers, ...) \ |
0c44c2d0 | 30 | do { \ |
117780ee | 31 | bool c; \ |
ba741e35 | 32 | asm volatile (fullop ";" CC_SET(cc) \ |
df340524 KC |
33 | : [counter] "+m" (var), CC_OUT(cc) (c) \ |
34 | : __VA_ARGS__ : clobbers); \ | |
117780ee | 35 | return c; \ |
0c44c2d0 PZ |
36 | } while (0) |
37 | ||
df340524 KC |
38 | #define __BINARY_RMWcc_ARG " %2, " |
39 | ||
40 | #endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) || !defined(CC_HAVE_ASM_GOTO) */ | |
41 | ||
0c44c2d0 | 42 | #define GEN_UNARY_RMWcc(op, var, arg0, cc) \ |
df340524 KC |
43 | __GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM) |
44 | ||
45 | #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, arg0, cc) \ | |
46 | __GEN_RMWcc(op " " arg0 "\n\t" suffix, var, cc, \ | |
47 | __CLOBBERS_MEM_CC_CX) | |
0c44c2d0 | 48 | |
e0f6dec3 | 49 | #define GEN_BINARY_RMWcc(op, var, vcon, val, arg0, cc) \ |
df340524 KC |
50 | __GEN_RMWcc(op __BINARY_RMWcc_ARG arg0, var, cc, \ |
51 | __CLOBBERS_MEM, vcon (val)) | |
0c44c2d0 | 52 | |
df340524 KC |
53 | #define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, vcon, val, arg0, cc) \ |
54 | __GEN_RMWcc(op __BINARY_RMWcc_ARG arg0 "\n\t" suffix, var, cc, \ | |
55 | __CLOBBERS_MEM_CC_CX, vcon (val)) | |
0c44c2d0 PZ |
56 | |
57 | #endif /* _ASM_X86_RMWcc */ |