projects / linux-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 70cbec0c VK |
1 | /* NG4fls.S: SPARC optimized fls and __fls for T4 and above. |
| 2 | * | |
| 3 | * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. | |
| 4 | */ | |
| 5 | ||
| 6 | #include <linux/linkage.h> | |
| 7 | ||
| 8 | #define LZCNT_O0_G2 \ | |
| 9 | .word 0x85b002e8 | |
| 10 | ||
| 11 | .text | |
| 12 | .register %g2, #scratch | |
| 13 | .register %g3, #scratch | |
| 14 | ||
| 15 | ENTRY(NG4fls) | |
| 16 | LZCNT_O0_G2 !lzcnt %o0, %g2 | |
| 17 | mov 64, %g3 | |
| 18 | retl | |
| 19 | sub %g3, %g2, %o0 | |
| 20 | ENDPROC(NG4fls) | |
| 2b41ce5d VK |
21 | |
| 22 | ENTRY(__NG4fls) | |
| 23 | brz,pn %o0, 1f | |
| 24 | LZCNT_O0_G2 !lzcnt %o0, %g2 | |
| 25 | mov 63, %g3 | |
| 26 | sub %g3, %g2, %o0 | |
| 27 | 1: | |
| 28 | retl | |
| 29 | nop | |
| 30 | ENDPROC(__NG4fls) |