| 1 | #ifndef __ASM_ALTERNATIVE_ASM_H |
| 2 | #define __ASM_ALTERNATIVE_ASM_H |
| 3 | |
| 4 | #ifdef __ASSEMBLY__ |
| 5 | |
| 6 | .macro altinstruction_entry orig_offset alt_offset feature orig_len alt_len |
| 7 | .word \orig_offset - . |
| 8 | .word \alt_offset - . |
| 9 | .hword \feature |
| 10 | .byte \orig_len |
| 11 | .byte \alt_len |
| 12 | .endm |
| 13 | |
| 14 | .macro alternative_insn insn1 insn2 cap |
| 15 | 661: \insn1 |
| 16 | 662: .pushsection .altinstructions, "a" |
| 17 | altinstruction_entry 661b, 663f, \cap, 662b-661b, 664f-663f |
| 18 | .popsection |
| 19 | .pushsection .altinstr_replacement, "ax" |
| 20 | 663: \insn2 |
| 21 | 664: .popsection |
| 22 | .if ((664b-663b) != (662b-661b)) |
| 23 | .error "Alternatives instruction length mismatch" |
| 24 | .endif |
| 25 | .endm |
| 26 | |
| 27 | #endif /* __ASSEMBLY__ */ |
| 28 | |
| 29 | #endif /* __ASM_ALTERNATIVE_ASM_H */ |