arch/x86/include/asm/rmwcc.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_RMWcc
#define _ASM_X86_RMWcc

#include <linux/args.h>

#define __CLOBBERS_MEM(clb...)	"memory", ## clb

#define __GEN_RMWcc(fullop, _var, cc, clobbers, ...)			\
({									\
	bool c;								\
	asm_inline volatile (fullop					\
			: [var] "+m" (_var), "=@cc" #cc (c)		\
			: __VA_ARGS__ : clobbers);			\
	c;								\
})

#define GEN_UNARY_RMWcc_4(op, var, cc, arg0)				\
	__GEN_RMWcc(op " " arg0, var, cc, __CLOBBERS_MEM())

#define GEN_UNARY_RMWcc_3(op, var, cc)					\
	GEN_UNARY_RMWcc_4(op, var, cc, "%[var]")

#define GEN_UNARY_RMWcc(X...)	CONCATENATE(GEN_UNARY_RMWcc_, COUNT_ARGS(X))(X)

#define GEN_BINARY_RMWcc_6(op, var, cc, vcon, _val, arg0)		\
	__GEN_RMWcc(op " %[val], " arg0, var, cc,			\
		    __CLOBBERS_MEM(), [val] vcon (_val))

#define GEN_BINARY_RMWcc_5(op, var, cc, vcon, val)			\
	GEN_BINARY_RMWcc_6(op, var, cc, vcon, val, "%[var]")

#define GEN_BINARY_RMWcc(X...)	CONCATENATE(GEN_BINARY_RMWcc_, COUNT_ARGS(X))(X)

#define GEN_UNARY_SUFFIXED_RMWcc(op, suffix, var, cc, clobbers...)	\
	__GEN_RMWcc(op " %[var]\n\t" suffix, var, cc,			\
		    __CLOBBERS_MEM(clobbers))

#define GEN_BINARY_SUFFIXED_RMWcc(op, suffix, var, cc, vcon, _val, clobbers...)\
	__GEN_RMWcc(op " %[val], %[var]\n\t" suffix, var, cc,		\
		    __CLOBBERS_MEM(clobbers), [val] vcon (_val))

#endif /* _ASM_X86_RMWcc */