| 1 | /* NG4fls.S: SPARC optimized fls and __fls for T4 and above. |
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| 2 | * |
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| 3 | * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
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| 4 | */ |
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| 5 | |
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| 6 | #include <linux/linkage.h> |
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| 7 | |
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| 8 | #define LZCNT_O0_G2 \ |
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| 9 | .word 0x85b002e8 |
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| 10 | |
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| 11 | .text |
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| 12 | .register %g2, #scratch |
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| 13 | .register %g3, #scratch |
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| 14 | |
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| 15 | ENTRY(NG4fls) |
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| 16 | LZCNT_O0_G2 !lzcnt %o0, %g2 |
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| 17 | mov 64, %g3 |
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| 18 | retl |
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| 19 | sub %g3, %g2, %o0 |
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| 20 | ENDPROC(NG4fls) |
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| 21 | |
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| 22 | ENTRY(__NG4fls) |
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| 23 | brz,pn %o0, 1f |
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| 24 | LZCNT_O0_G2 !lzcnt %o0, %g2 |
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| 25 | mov 63, %g3 |
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| 26 | sub %g3, %g2, %o0 |
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| 27 | 1: |
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| 28 | retl |
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| 29 | nop |
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| 30 | ENDPROC(__NG4fls) |
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| 31 | |
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