smartalign.mac

汇编编译器的最新版本的源码.买了自己动手写操作系统这本书的人一定要下

;
; Smart alignment macros
;
USE: smartalign

%imacro alignmode 1-2.nolist
  %ifidni %1,nop
    %define __ALIGN_JMP_THRESHOLD__ 16

    %define __ALIGN_16BIT_1B__ 0x90
    %define __ALIGN_16BIT_2B__ 0x90,0x90
    %define __ALIGN_16BIT_3B__ 0x90,0x90,0x90
    %define __ALIGN_16BIT_4B__ 0x90,0x90,0x90,0x90
    %define __ALIGN_16BIT_5B__ 0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_16BIT_6B__ 0x90,0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_16BIT_7B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_16BIT_8B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90

    %define __ALIGN_32BIT_1B__ 0x90
    %define __ALIGN_32BIT_2B__ 0x90,0x90
    %define __ALIGN_32BIT_3B__ 0x90,0x90,0x90
    %define __ALIGN_32BIT_4B__ 0x90,0x90,0x90,0x90
    %define __ALIGN_32BIT_5B__ 0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_32BIT_6B__ 0x90,0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_32BIT_7B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_32BIT_8B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90

    %define __ALIGN_64BIT_1B__ 0x90
    %define __ALIGN_64BIT_2B__ 0x90,0x90
    %define __ALIGN_64BIT_3B__ 0x90,0x90,0x90
    %define __ALIGN_64BIT_4B__ 0x90,0x90,0x90,0x90
    %define __ALIGN_64BIT_5B__ 0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_64BIT_6B__ 0x90,0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_64BIT_7B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90
    %define __ALIGN_64BIT_8B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90
  %elifidni %1,generic
    %define __ALIGN_JMP_THRESHOLD__ 8

    %define __ALIGN_16BIT_1B__ 0x90
    %define __ALIGN_16BIT_2B__ 0x89,0xf6
    %define __ALIGN_16BIT_3B__ 0x8d,0x74,0x00
    %define __ALIGN_16BIT_4B__ 0x8d,0xb4,0x00,0x00
    %define __ALIGN_16BIT_5B__ 0x90,0x8d,0xb4,0x00,0x00
    %define __ALIGN_16BIT_6B__ 0x89,0xf6,0x8d,0xbd,0x00,0x00
    %define __ALIGN_16BIT_7B__ 0x8d,0x74,0x00,0x8d,0xbd,0x00,0x00
    %define __ALIGN_16BIT_8B__ 0x8d,0xb4,0x00,0x00,0x8d,0xbd,0x00,0x00

    %define __ALIGN_32BIT_1B__ 0x90
    %define __ALIGN_32BIT_2B__ 0x89,0xf6
    %define __ALIGN_32BIT_3B__ 0x8d,0x76,0x00
    %define __ALIGN_32BIT_4B__ 0x8d,0x74,0x26,0x00
    %define __ALIGN_32BIT_5B__ 0x90,0x8d,0x74,0x26,0x00
    %define __ALIGN_32BIT_6B__ 0x8d,0xb6,0x00,0x00,0x00,0x00
    %define __ALIGN_32BIT_7B__ 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00
    %undef  __ALIGN_32BIT_8B__

    %define __ALIGN_64BIT_1B__ 0x90
    %define __ALIGN_64BIT_2B__ 0x66,0x90
    %define __ALIGN_64BIT_3B__ 0x66,0x66,0x90
    %define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90
    %define __ALIGN_64BIT_5B__ 0x66,0x66,0x90,0x66,0x90
    %define __ALIGN_64BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_64BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_64BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
  %elifidni %1,k8
    %define __ALIGN_JMP_THRESHOLD__ 16

    %define __ALIGN_16BIT_1B__ 0x90
    %define __ALIGN_16BIT_2B__ 0x66,0x90
    %define __ALIGN_16BIT_3B__ 0x66,0x66,0x90
    %define __ALIGN_16BIT_4B__ 0x66,0x66,0x66,0x90
    %define __ALIGN_16BIT_5B__ 0x66,0x66,0x90,0x66,0x90
    %define __ALIGN_16BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_16BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_16BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90

    %define __ALIGN_32BIT_1B__ 0x90
    %define __ALIGN_32BIT_2B__ 0x66,0x90
    %define __ALIGN_32BIT_3B__ 0x66,0x66,0x90
    %define __ALIGN_32BIT_4B__ 0x66,0x66,0x66,0x90
    %define __ALIGN_32BIT_5B__ 0x66,0x66,0x90,0x66,0x90
    %define __ALIGN_32BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_32BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_32BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90

    %define __ALIGN_64BIT_1B__ 0x90
    %define __ALIGN_64BIT_2B__ 0x66,0x90
    %define __ALIGN_64BIT_3B__ 0x66,0x66,0x90
    %define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90
    %define __ALIGN_64BIT_5B__ 0x66,0x66,0x90,0x66,0x90
    %define __ALIGN_64BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_64BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_64BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
  %elifidni %1,k7
    %define __ALIGN_JMP_THRESHOLD__ 16

    %define __ALIGN_16BIT_1B__ 0x90
    %define __ALIGN_16BIT_2B__ 0x66,0x90
    %define __ALIGN_16BIT_3B__ 0x66,0x66,0x90
    %define __ALIGN_16BIT_4B__ 0x66,0x66,0x66,0x90
    %define __ALIGN_16BIT_5B__ 0x66,0x66,0x90,0x66,0x90
    %define __ALIGN_16BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_16BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_16BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90

    %define __ALIGN_32BIT_1B__ 0x90
    %define __ALIGN_32BIT_2B__ 0x8b,0xc0
    %define __ALIGN_32BIT_3B__ 0x8d,0x04,0x20
    %define __ALIGN_32BIT_4B__ 0x8d,0x44,0x20,0x00
    %define __ALIGN_32BIT_5B__ 0x8d,0x44,0x20,0x00,0x90
    %define __ALIGN_32BIT_6B__ 0x8d,0x80,0x00,0x00,0x00,0x00
    %define __ALIGN_32BIT_7B__ 0x8d,0x04,0x05,0x00,0x00,0x00,0x00
    %undef  __ALIGN_32BIT_8B__

    %define __ALIGN_64BIT_1B__ 0x90
    %define __ALIGN_64BIT_2B__ 0x66,0x90
    %define __ALIGN_64BIT_3B__ 0x66,0x66,0x90
    %define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90
    %define __ALIGN_64BIT_5B__ 0x66,0x66,0x90,0x66,0x90
    %define __ALIGN_64BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_64BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
    %define __ALIGN_64BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
  %elifidni %1,p6
    %define __ALIGN_JMP_THRESHOLD__ 16

    %define __ALIGN_16BIT_1B__ 0x90
    %define __ALIGN_16BIT_2B__ 0x66,0x90
    %define __ALIGN_16BIT_3B__ 0x0f,0x1f,0x00
    %define __ALIGN_16BIT_4B__ 0x0f,0x1f,0x40,0x00
    %define __ALIGN_16BIT_5B__ 0x90,0x0f,0x1f,0x40,0x00
    %define __ALIGN_16BIT_6B__ 0x0f,0x1f,0x00,0x0f,0x1f,0x00
    %define __ALIGN_16BIT_7B__ 0x0f,0x1f,0x00,0x0f,0x1f,0x40,0x00
    %define __ALIGN_16BIT_8B__ 0x0f,0x1f,0x40,0x00,0x0f,0x1f,0x40,0x00

    %define __ALIGN_32BIT_1B__ 0x90
    %define __ALIGN_32BIT_2B__ 0x66,0x90
    %define __ALIGN_32BIT_3B__ 0x0f,0x1f,0x00
    %define __ALIGN_32BIT_4B__ 0x0f,0x1f,0x40,0x00
    %define __ALIGN_32BIT_5B__ 0x0f,0x1f,0x44,0x00,0x00
    %define __ALIGN_32BIT_6B__ 0x66,0x0f,0x1f,0x44,0x00,0x00
    %define __ALIGN_32BIT_7B__ 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00
    %define __ALIGN_32BIT_8B__ 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00

    %define __ALIGN_64BIT_1B__ 0x90
    %define __ALIGN_64BIT_2B__ 0x66,0x90
    %define __ALIGN_64BIT_3B__ 0x0f,0x1f,0x00
    %define __ALIGN_64BIT_4B__ 0x0f,0x1f,0x40,0x00
    %define __ALIGN_64BIT_5B__ 0x0f,0x1f,0x44,0x00,0x00
    %define __ALIGN_64BIT_6B__ 0x66,0x0f,0x1f,0x44,0x00,0x00
    %define __ALIGN_64BIT_7B__ 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00
    %define __ALIGN_64BIT_8B__ 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00
  %else
    %error unknown alignment mode: %1
  %endif
  %ifnempty %2
    %xdefine __ALIGN_JMP_THRESHOLD__ %2
  %endif
  %xdefine __ALIGNMODE__ %1,__ALIGN_JMP_THRESHOLD__
%endmacro

%unimacro align 1-2+.nolist
%imacro align 1-2+.nolist
  %ifnempty %2
    times (((%1) - (($-$$) % (%1))) % (%1)) %2
  %else
    %push
    %assign %$pad (((%1) - (($-$$) % (%1))) % (%1))
    %if %$pad > __ALIGN_JMP_THRESHOLD__
      jmp %$end
      ; We can't re-use %$pad here as $ will have changed!
      times (((%1) - (($-$$) % (%1))) % (%1)) nop
%$end:
    %else
      %if __BITS__ == 16
        %ifdef __ALIGN_16BIT_8B__
          %rep %$pad / 8
            db __ALIGN_16BIT_8B__
          %endrep
          %assign %$pad %$pad % 8
        %else
          %rep %$pad / 7
            db __ALIGN_16BIT_7B__
          %endrep
          %assign %$pad %$pad % 7
        %endif
        %if %$pad == 1
          db __ALIGN_16BIT_1B__
        %elif %$pad == 2
          db __ALIGN_16BIT_2B__
        %elif %$pad == 3
          db __ALIGN_16BIT_3B__
        %elif %$pad == 4
          db __ALIGN_16BIT_4B__
        %elif %$pad == 5
          db __ALIGN_16BIT_5B__
        %elif %$pad == 6
          db __ALIGN_16BIT_6B__
        %elif %$pad == 7
          db __ALIGN_16BIT_7B__
        %endif
      %elif __BITS__ == 32
        %ifdef __ALIGN_32BIT_8B__
          %rep %$pad / 8
            db __ALIGN_32BIT_8B__
          %endrep
          %assign %$pad %$pad % 8
        %else
          %rep %$pad / 7
            db __ALIGN_32BIT_7B__
          %endrep
          %assign %$pad %$pad % 7
        %endif
        %if %$pad == 1
          db __ALIGN_32BIT_1B__
        %elif %$pad == 2
          db __ALIGN_32BIT_2B__
        %elif %$pad == 3
          db __ALIGN_32BIT_3B__
        %elif %$pad == 4
          db __ALIGN_32BIT_4B__
        %elif %$pad == 5
          db __ALIGN_32BIT_5B__
        %elif %$pad == 6
          db __ALIGN_32BIT_6B__
        %elif %$pad == 7
          db __ALIGN_32BIT_7B__
        %endif
      %elif __BITS__ == 64
        %ifdef __ALIGN_64BIT_8B__
          %rep %$pad / 8
            db __ALIGN_64BIT_8B__
          %endrep
          %assign %$pad %$pad % 8
        %else
          %rep %$pad / 7
            db __ALIGN_64BIT_7B__
          %endrep
          %assign %$pad %$pad % 7
        %endif
        %if %$pad == 1
          db __ALIGN_64BIT_1B__
        %elif %$pad == 2
          db __ALIGN_64BIT_2B__
        %elif %$pad == 3
          db __ALIGN_64BIT_3B__
        %elif %$pad == 4
          db __ALIGN_64BIT_4B__
        %elif %$pad == 5
          db __ALIGN_64BIT_5B__
        %elif %$pad == 6
          db __ALIGN_64BIT_6B__
        %elif %$pad == 7
          db __ALIGN_64BIT_7B__
        %endif
      %else
        %error "Invalid __BITS__ value"
      %endif
    %endif
    %pop
  %endif
%endmacro

	alignmode generic