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smartalign.mac: smart alignments macro package

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"%use smartalign" followed by an optional "alignmode" can be used to
enable smart macros.
This commit is contained in:
H. Peter Anvin 2008-07-16 14:41:39 -07:00
parent a26433db68
commit f5975eead1
2 changed files with 278 additions and 0 deletions
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macros/smartalign.mac Normal file
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;
; Smart alignment macros
;
USE: smartalign
%imacro alignmode 1-2.nolist
%ifnempty %2
%xdefine __ALIGN_JMP_THRESHOLD__ %2
%else
%define __ALIGN_JMP_THRESHOLD__ 17
%endif
%ifidni %1,nop
%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_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__ 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_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_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_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__ 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
%xdefine __ALIGNMODE__ %1,__ALIGN_JMP_THRESHOLD__
%endmacro
%unimacro align 1-2+.nolist
%imacro align 1-2+.nolist
%ifnempty %2
times ($$-$) % (%1) %2
%else
%push
%assign %$pad ($$-$) % %1
%if %$pad >= __ALIGN_JMP_THRESHOLD__
jmp %%end
; We can't re-use %$pad here as $ will have changed!
times ($$-$) % %1 db 90h
%%end:
%else
%if __BITS__ == 16
%ifdef __ALIGN_16BIT_8B__
%rep %$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

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%use smartalign
bits 32
alignmode nop
add ax,ax
align 16
alignmode generic
add ax,ax
align 16
alignmode k7
add ax,ax
align 16
alignmode k8
add ax,ax
align 16
alignmode p6
add ax,ax
align 16