mirror of
https://github.com/netwide-assembler/nasm.git
synced 2024-12-27 09:29:06 +08:00
264 lines
9.3 KiB
Plaintext
264 lines
9.3 KiB
Plaintext
;
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; Smart alignment macros
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;
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USE: smartalign
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%imacro alignmode 1-2.nolist
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%ifidni %1,nop
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%define __ALIGN_JMP_THRESHOLD__ 16
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%define __ALIGN_16BIT_1B__ 0x90
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%define __ALIGN_16BIT_2B__ 0x90,0x90
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%define __ALIGN_16BIT_3B__ 0x90,0x90,0x90
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%define __ALIGN_16BIT_4B__ 0x90,0x90,0x90,0x90
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%define __ALIGN_16BIT_5B__ 0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_16BIT_6B__ 0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_16BIT_7B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_16BIT_8B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_32BIT_1B__ 0x90
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%define __ALIGN_32BIT_2B__ 0x90,0x90
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%define __ALIGN_32BIT_3B__ 0x90,0x90,0x90
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%define __ALIGN_32BIT_4B__ 0x90,0x90,0x90,0x90
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%define __ALIGN_32BIT_5B__ 0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_32BIT_6B__ 0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_32BIT_7B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_32BIT_8B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_64BIT_1B__ 0x90
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%define __ALIGN_64BIT_2B__ 0x90,0x90
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%define __ALIGN_64BIT_3B__ 0x90,0x90,0x90
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%define __ALIGN_64BIT_4B__ 0x90,0x90,0x90,0x90
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%define __ALIGN_64BIT_5B__ 0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_64BIT_6B__ 0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_64BIT_7B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90
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%define __ALIGN_64BIT_8B__ 0x90,0x90,0x90,0x90,0x90,0x90,0x90,0x90
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%elifidni %1,generic
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%define __ALIGN_JMP_THRESHOLD__ 8
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%define __ALIGN_16BIT_1B__ 0x90
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%define __ALIGN_16BIT_2B__ 0x89,0xf6
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%define __ALIGN_16BIT_3B__ 0x8d,0x74,0x00
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%define __ALIGN_16BIT_4B__ 0x8d,0xb4,0x00,0x00
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%define __ALIGN_16BIT_5B__ 0x90,0x8d,0xb4,0x00,0x00
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%define __ALIGN_16BIT_6B__ 0x89,0xf6,0x8d,0xbd,0x00,0x00
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%define __ALIGN_16BIT_7B__ 0x8d,0x74,0x00,0x8d,0xbd,0x00,0x00
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%define __ALIGN_16BIT_8B__ 0x8d,0xb4,0x00,0x00,0x8d,0xbd,0x00,0x00
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%define __ALIGN_32BIT_1B__ 0x90
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%define __ALIGN_32BIT_2B__ 0x89,0xf6
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%define __ALIGN_32BIT_3B__ 0x8d,0x76,0x00
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%define __ALIGN_32BIT_4B__ 0x8d,0x74,0x26,0x00
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%define __ALIGN_32BIT_5B__ 0x90,0x8d,0x74,0x26,0x00
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%define __ALIGN_32BIT_6B__ 0x8d,0xb6,0x00,0x00,0x00,0x00
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%define __ALIGN_32BIT_7B__ 0x8d,0xb4,0x26,0x00,0x00,0x00,0x00
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%undef __ALIGN_32BIT_8B__
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%define __ALIGN_64BIT_1B__ 0x90
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%define __ALIGN_64BIT_2B__ 0x66,0x90
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%define __ALIGN_64BIT_3B__ 0x66,0x66,0x90
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%define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90
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%define __ALIGN_64BIT_5B__ 0x66,0x66,0x90,0x66,0x90
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%define __ALIGN_64BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_64BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_64BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
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%elifidni %1,k8
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%define __ALIGN_JMP_THRESHOLD__ 16
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%define __ALIGN_16BIT_1B__ 0x90
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%define __ALIGN_16BIT_2B__ 0x66,0x90
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%define __ALIGN_16BIT_3B__ 0x66,0x66,0x90
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%define __ALIGN_16BIT_4B__ 0x66,0x66,0x66,0x90
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%define __ALIGN_16BIT_5B__ 0x66,0x66,0x90,0x66,0x90
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%define __ALIGN_16BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_16BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_16BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
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%define __ALIGN_32BIT_1B__ 0x90
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%define __ALIGN_32BIT_2B__ 0x66,0x90
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%define __ALIGN_32BIT_3B__ 0x66,0x66,0x90
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%define __ALIGN_32BIT_4B__ 0x66,0x66,0x66,0x90
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%define __ALIGN_32BIT_5B__ 0x66,0x66,0x90,0x66,0x90
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%define __ALIGN_32BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_32BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_32BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
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%define __ALIGN_64BIT_1B__ 0x90
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%define __ALIGN_64BIT_2B__ 0x66,0x90
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%define __ALIGN_64BIT_3B__ 0x66,0x66,0x90
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%define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90
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%define __ALIGN_64BIT_5B__ 0x66,0x66,0x90,0x66,0x90
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%define __ALIGN_64BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_64BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_64BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
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%elifidni %1,k7
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%define __ALIGN_JMP_THRESHOLD__ 16
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%define __ALIGN_16BIT_1B__ 0x90
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%define __ALIGN_16BIT_2B__ 0x66,0x90
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%define __ALIGN_16BIT_3B__ 0x66,0x66,0x90
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%define __ALIGN_16BIT_4B__ 0x66,0x66,0x66,0x90
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%define __ALIGN_16BIT_5B__ 0x66,0x66,0x90,0x66,0x90
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%define __ALIGN_16BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_16BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_16BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
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%define __ALIGN_32BIT_1B__ 0x90
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%define __ALIGN_32BIT_2B__ 0x8b,0xc0
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%define __ALIGN_32BIT_3B__ 0x8d,0x04,0x20
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%define __ALIGN_32BIT_4B__ 0x8d,0x44,0x20,0x00
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%define __ALIGN_32BIT_5B__ 0x8d,0x44,0x20,0x00,0x90
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%define __ALIGN_32BIT_6B__ 0x8d,0x80,0x00,0x00,0x00,0x00
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%define __ALIGN_32BIT_7B__ 0x8d,0x04,0x05,0x00,0x00,0x00,0x00
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%undef __ALIGN_32BIT_8B__
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%define __ALIGN_64BIT_1B__ 0x90
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%define __ALIGN_64BIT_2B__ 0x66,0x90
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%define __ALIGN_64BIT_3B__ 0x66,0x66,0x90
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%define __ALIGN_64BIT_4B__ 0x66,0x66,0x66,0x90
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%define __ALIGN_64BIT_5B__ 0x66,0x66,0x90,0x66,0x90
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%define __ALIGN_64BIT_6B__ 0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_64BIT_7B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x90
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%define __ALIGN_64BIT_8B__ 0x66,0x66,0x66,0x90,0x66,0x66,0x66,0x90
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%elifidni %1,p6
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%define __ALIGN_JMP_THRESHOLD__ 16
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%define __ALIGN_16BIT_1B__ 0x90
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%define __ALIGN_16BIT_2B__ 0x66,0x90
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%define __ALIGN_16BIT_3B__ 0x0f,0x1f,0x00
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%define __ALIGN_16BIT_4B__ 0x0f,0x1f,0x40,0x00
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%define __ALIGN_16BIT_5B__ 0x90,0x0f,0x1f,0x40,0x00
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%define __ALIGN_16BIT_6B__ 0x0f,0x1f,0x00,0x0f,0x1f,0x00
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%define __ALIGN_16BIT_7B__ 0x0f,0x1f,0x00,0x0f,0x1f,0x40,0x00
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%define __ALIGN_16BIT_8B__ 0x0f,0x1f,0x40,0x00,0x0f,0x1f,0x40,0x00
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%define __ALIGN_32BIT_1B__ 0x90
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%define __ALIGN_32BIT_2B__ 0x66,0x90
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%define __ALIGN_32BIT_3B__ 0x0f,0x1f,0x00
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%define __ALIGN_32BIT_4B__ 0x0f,0x1f,0x40,0x00
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%define __ALIGN_32BIT_5B__ 0x0f,0x1f,0x44,0x00,0x00
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%define __ALIGN_32BIT_6B__ 0x66,0x0f,0x1f,0x44,0x00,0x00
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%define __ALIGN_32BIT_7B__ 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00
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%define __ALIGN_32BIT_8B__ 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00
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%define __ALIGN_64BIT_1B__ 0x90
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%define __ALIGN_64BIT_2B__ 0x66,0x90
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%define __ALIGN_64BIT_3B__ 0x0f,0x1f,0x00
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%define __ALIGN_64BIT_4B__ 0x0f,0x1f,0x40,0x00
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%define __ALIGN_64BIT_5B__ 0x0f,0x1f,0x44,0x00,0x00
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%define __ALIGN_64BIT_6B__ 0x66,0x0f,0x1f,0x44,0x00,0x00
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%define __ALIGN_64BIT_7B__ 0x0f,0x1f,0x80,0x00,0x00,0x00,0x00
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%define __ALIGN_64BIT_8B__ 0x0f,0x1f,0x84,0x00,0x00,0x00,0x00,0x00
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%else
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%error unknown alignment mode: %1
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%endif
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%ifnempty %2
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%xdefine __ALIGN_JMP_THRESHOLD__ %2
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%endif
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%xdefine __ALIGNMODE__ %1,__ALIGN_JMP_THRESHOLD__
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%endmacro
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%unimacro align 1-2+.nolist
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%imacro align 1-2+.nolist
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%ifnempty %2
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times ($$-$) % (%1) %2
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%else
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%push
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%assign %$pad ($$-$) % %1
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%if %$pad > __ALIGN_JMP_THRESHOLD__
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jmp %$end
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; We can't re-use %$pad here as $ will have changed!
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times ($$-$) % %1 db 90h
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%$end:
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%else
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%if __BITS__ == 16
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%ifdef __ALIGN_16BIT_8B__
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%rep %$pad / 8
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db __ALIGN_16BIT_8B__
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%endrep
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%assign %$pad %$pad % 8
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%else
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%rep %$pad / 7
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db __ALIGN_16BIT_7B__
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%endrep
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%assign %$pad %$pad % 7
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%endif
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%if %$pad == 1
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db __ALIGN_16BIT_1B__
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%elif %$pad == 2
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db __ALIGN_16BIT_2B__
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%elif %$pad == 3
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db __ALIGN_16BIT_3B__
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%elif %$pad == 4
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db __ALIGN_16BIT_4B__
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%elif %$pad == 5
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db __ALIGN_16BIT_5B__
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%elif %$pad == 6
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db __ALIGN_16BIT_6B__
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%elif %$pad == 7
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db __ALIGN_16BIT_7B__
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%endif
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%elif __BITS__ == 32
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%ifdef __ALIGN_32BIT_8B__
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%rep %$pad / 8
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db __ALIGN_32BIT_8B__
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%endrep
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%assign %$pad %$pad % 8
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%else
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%rep %$pad / 7
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db __ALIGN_32BIT_7B__
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%endrep
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%assign %$pad %$pad % 7
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%endif
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%if %$pad == 1
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db __ALIGN_32BIT_1B__
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%elif %$pad == 2
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db __ALIGN_32BIT_2B__
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%elif %$pad == 3
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db __ALIGN_32BIT_3B__
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%elif %$pad == 4
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db __ALIGN_32BIT_4B__
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%elif %$pad == 5
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db __ALIGN_32BIT_5B__
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%elif %$pad == 6
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db __ALIGN_32BIT_6B__
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%elif %$pad == 7
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db __ALIGN_32BIT_7B__
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%endif
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%elif __BITS__ == 64
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%ifdef __ALIGN_64BIT_8B__
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%rep %$pad / 8
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db __ALIGN_64BIT_8B__
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%endrep
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%assign %$pad %$pad % 8
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%else
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%rep %$pad / 7
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db __ALIGN_64BIT_7B__
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%endrep
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%assign %$pad %$pad % 7
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%endif
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%if %$pad == 1
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db __ALIGN_64BIT_1B__
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%elif %$pad == 2
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db __ALIGN_64BIT_2B__
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%elif %$pad == 3
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db __ALIGN_64BIT_3B__
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%elif %$pad == 4
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db __ALIGN_64BIT_4B__
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%elif %$pad == 5
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db __ALIGN_64BIT_5B__
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%elif %$pad == 6
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db __ALIGN_64BIT_6B__
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%elif %$pad == 7
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db __ALIGN_64BIT_7B__
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%endif
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%else
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%error "Invalid __BITS__ value"
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%endif
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%endif
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%pop
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%endif
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%endmacro
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alignmode generic
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