asm.h

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#ifndef _ASM_X86_ASM_H
#define _ASM_X86_ASM_H

#ifdef __ASSEMBLY__
# define __ASM_FORM(x)  x
# define __ASM_FORM_COMMA(x) x,
#else
# define __ASM_FORM(x)  " " #x " "
# define __ASM_FORM_COMMA(x) " " #x ","
#endif

#ifdef CONFIG_X86_32
# define __ASM_SEL(a,b) __ASM_FORM(a)
#else
# define __ASM_SEL(a,b) __ASM_FORM(b)
#endif

#define __ASM_SIZE(inst, ...)   __ASM_SEL(inst##l##__VA_ARGS__, \
                      inst##q##__VA_ARGS__)
#define __ASM_REG(reg)      __ASM_SEL(e##reg, r##reg)

#define _ASM_PTR    __ASM_SEL(.long, .quad)
#define _ASM_ALIGN  __ASM_SEL(.balign 4, .balign 8)

#define _ASM_MOV    __ASM_SIZE(mov)
#define _ASM_INC    __ASM_SIZE(inc)
#define _ASM_DEC    __ASM_SIZE(dec)
#define _ASM_ADD    __ASM_SIZE(add)
#define _ASM_SUB    __ASM_SIZE(sub)
#define _ASM_XADD   __ASM_SIZE(xadd)

#define _ASM_AX     __ASM_REG(ax)
#define _ASM_BX     __ASM_REG(bx)
#define _ASM_CX     __ASM_REG(cx)
#define _ASM_DX     __ASM_REG(dx)
#define _ASM_SP     __ASM_REG(sp)
#define _ASM_BP     __ASM_REG(bp)
#define _ASM_SI     __ASM_REG(si)
#define _ASM_DI     __ASM_REG(di)

/* Exception table entry */
#ifdef __ASSEMBLY__
# define _ASM_EXTABLE(from,to)                  \
    .pushsection "__ex_table","a" ;             \
    .balign 8 ;                     \
    .long (from) - . ;                  \
    .long (to) - . ;                    \
    .popsection

# define _ASM_EXTABLE_EX(from,to)               \
    .pushsection "__ex_table","a" ;             \
    .balign 8 ;                     \
    .long (from) - . ;                  \
    .long (to) - . + 0x7ffffff0 ;               \
    .popsection
#else
# define _ASM_EXTABLE(from,to)                  \
    " .pushsection \"__ex_table\",\"a\"\n"          \
    " .balign 8\n"                      \
    " .long (" #from ") - .\n"              \
    " .long (" #to ") - .\n"                \
    " .popsection\n"

# define _ASM_EXTABLE_EX(from,to)               \
    " .pushsection \"__ex_table\",\"a\"\n"          \
    " .balign 8\n"                      \
    " .long (" #from ") - .\n"              \
    " .long (" #to ") - . + 0x7ffffff0\n"           \
    " .popsection\n"
#endif

#endif /* _ASM_X86_ASM_H */