rmwcc.h

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