2014-11-14 15:54:08 +00:00
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#ifndef __ASM_ALTERNATIVE_ASM_H
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#define __ASM_ALTERNATIVE_ASM_H
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#ifdef __ASSEMBLY__
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.macro altinstruction_entry orig_offset alt_offset feature orig_len alt_len
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.word \orig_offset - .
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.word \alt_offset - .
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.hword \feature
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.byte \orig_len
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.byte \alt_len
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.endm
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2014-11-14 15:54:10 +00:00
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.macro alternative_insn insn1 insn2 cap
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661: \insn1
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662: .pushsection .altinstructions, "a"
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altinstruction_entry 661b, 663f, \cap, 662b-661b, 664f-663f
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.popsection
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.pushsection .altinstr_replacement, "ax"
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663: \insn2
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664: .popsection
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.if ((664b-663b) != (662b-661b))
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.error "Alternatives instruction length mismatch"
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.endif
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.endm
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2014-11-14 15:54:08 +00:00
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#endif /* __ASSEMBLY__ */
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#endif /* __ASM_ALTERNATIVE_ASM_H */
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