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nasm/macros/smartalign.mac

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smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
;
; Smart alignment macros
;
USE: smartalign
%imacro alignmode 1-2.nolist
%ifidni %1,nop
smartalign: adjust the alignment threshold Apparently the current recommendation is for a smaller threshold when using the "generic"-style alignment macros (short jumps are cheaper on newer CPUs.) Also change the alignment threshold definition to reflect the maximum number of padding instead of when to start using jumps.
2008-07-18 05:22:10 +08:00
%define __ALIGN_JMP_THRESHOLD__ 16
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%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
smartalign: adjust the alignment threshold Apparently the current recommendation is for a smaller threshold when using the "generic"-style alignment macros (short jumps are cheaper on newer CPUs.) Also change the alignment threshold definition to reflect the maximum number of padding instead of when to start using jumps.
2008-07-18 05:22:10 +08:00
%define __ALIGN_JMP_THRESHOLD__ 8
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%define __ALIGN_16BIT_1B__ 0x90
smartalign: 16-bit generic alignment macros Smart alignment content for 16-bit "generic" mode
2008-07-18 05:20:06 +08:00
%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
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%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
smartalign: adjust the alignment threshold Apparently the current recommendation is for a smaller threshold when using the "generic"-style alignment macros (short jumps are cheaper on newer CPUs.) Also change the alignment threshold definition to reflect the maximum number of padding instead of when to start using jumps.
2008-07-18 05:22:10 +08:00
%define __ALIGN_JMP_THRESHOLD__ 16
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%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
smartalign: adjust the alignment threshold Apparently the current recommendation is for a smaller threshold when using the "generic"-style alignment macros (short jumps are cheaper on newer CPUs.) Also change the alignment threshold definition to reflect the maximum number of padding instead of when to start using jumps.
2008-07-18 05:22:10 +08:00
%define __ALIGN_JMP_THRESHOLD__ 16
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%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
smartalign: adjust the alignment threshold Apparently the current recommendation is for a smaller threshold when using the "generic"-style alignment macros (short jumps are cheaper on newer CPUs.) Also change the alignment threshold definition to reflect the maximum number of padding instead of when to start using jumps.
2008-07-18 05:22:10 +08:00
%define __ALIGN_JMP_THRESHOLD__ 16
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%define __ALIGN_16BIT_1B__ 0x90
%define __ALIGN_16BIT_2B__ 0x66,0x90
smartalign: 16-bit P6 NOPs Add 16-bit P6 NOPs
2008-07-18 05:13:53 +08:00
%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
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%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
smartalign: 16-bit generic alignment macros Smart alignment content for 16-bit "generic" mode
2008-07-18 05:20:06 +08:00
%ifnempty %2
%xdefine __ALIGN_JMP_THRESHOLD__ %2
%endif
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%xdefine __ALIGNMODE__ %1,__ALIGN_JMP_THRESHOLD__
%endmacro
%unimacro align 1-2+.nolist
%imacro align 1-2+.nolist
%ifnempty %2
Actually make non-power-of-2 alignments work We can't use ($$-$) % (%1) since the wraparound will be wrong except for powers of 2. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-09-25 17:31:50 +08:00
times ((%1) - (($-$$) % (%1))) %2
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%else
%push
Actually make non-power-of-2 alignments work We can't use ($$-$) % (%1) since the wraparound will be wrong except for powers of 2. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-09-25 17:31:50 +08:00
%assign %$pad (%1) - (($-$$) % (%1))
smartalign: adjust the alignment threshold Apparently the current recommendation is for a smaller threshold when using the "generic"-style alignment macros (short jumps are cheaper on newer CPUs.) Also change the alignment threshold definition to reflect the maximum number of padding instead of when to start using jumps.
2008-07-18 05:22:10 +08:00
%if %$pad > __ALIGN_JMP_THRESHOLD__
smartalign: use context-local label Use a context-local label in the smart align macro.
2008-07-18 05:28:29 +08:00
jmp %$end
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
; We can't re-use %$pad here as $ will have changed!
Actually make non-power-of-2 alignments work We can't use ($$-$) % (%1) since the wraparound will be wrong except for powers of 2. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-09-25 17:31:50 +08:00
times ((%1) - (($-$$) % (%1))) nop
smartalign: use context-local label Use a context-local label in the smart align macro.
2008-07-18 05:28:29 +08:00
%$end:
smartalign.mac: smart alignments macro package "%use smartalign" followed by an optional "alignmode" can be used to enable smart macros.
2008-07-17 05:41:39 +08:00
%else
%if __BITS__ == 16
%ifdef __ALIGN_16BIT_8B__
%rep %$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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