1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _ASM_X86_RMWcc
3 #define _ASM_X86_RMWcc
4
5 #include <linux/args.h>
6
7 #define __CLOBBERS_MEM(clb...) "memory", ## c
8
9 #ifndef __GCC_ASM_FLAG_OUTPUTS__
10
11 /* Use asm goto */
12
13 #define __GEN_RMWcc(fullop, _var, cc, clobbers
14 ({
15 bool c = false;
16 asm goto (fullop "; j" #cc " %l[cc_lab
17 : : [var] "m" (_var),
18 : clobbers : cc_label)
19 if (0) {
20 cc_label: c = true;
21 }
22 c;
23 })
24
25 #else /* defined(__GCC_ASM_FLAG_OUTPUTS__) */
26
27 /* Use flags output or a set instruction */
28
29 #define __GEN_RMWcc(fullop, _var, cc, clobbers
30 ({
31 bool c;
32 asm volatile (fullop CC_SET(cc)
33 : [var] "+m" (_var), C
34 : __VA_ARGS__ : clobbe
35 c;
36 })
37
38 #endif /* defined(__GCC_ASM_FLAG_OUTPUTS__) */
39
40 #define GEN_UNARY_RMWcc_4(op, var, cc, arg0)
41 __GEN_RMWcc(op " " arg0, var, cc, __CL
42
43 #define GEN_UNARY_RMWcc_3(op, var, cc)
44 GEN_UNARY_RMWcc_4(op, var, cc, "%[var]
45
46 #define GEN_UNARY_RMWcc(X...) CONCATENATE(GE
47
48 #define GEN_BINARY_RMWcc_6(op, var, cc, vcon,
49 __GEN_RMWcc(op " %[val], " arg0, var,
50 __CLOBBERS_MEM(), [val] vc
51
52 #define GEN_BINARY_RMWcc_5(op, var, cc, vcon,
53 GEN_BINARY_RMWcc_6(op, var, cc, vcon,
54
55 #define GEN_BINARY_RMWcc(X...) CONCATENATE(GE
56
57 #define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, v
58 __GEN_RMWcc(op " %[var]\n\t" suffix, v
59 __CLOBBERS_MEM(clobbers))
60
61 #define GEN_BINARY_SUFFIXED_RMWcc(op, suffix,
62 __GEN_RMWcc(op " %[val], %[var]\n\t" s
63 __CLOBBERS_MEM(clobbers),
64
65 #endif /* _ASM_X86_RMWcc */
66
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.