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30 lines
495 B
30 lines
495 B
/* NG4fls.S: SPARC optimized fls and __fls for T4 and above. |
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* |
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* Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved. |
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*/ |
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#include <linux/linkage.h> |
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#define LZCNT_O0_G2 \ |
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.word 0x85b002e8 |
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.text |
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.register %g2, #scratch |
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.register %g3, #scratch |
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ENTRY(NG4fls) |
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LZCNT_O0_G2 !lzcnt %o0, %g2 |
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mov 64, %g3 |
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retl |
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sub %g3, %g2, %o0 |
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ENDPROC(NG4fls) |
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ENTRY(__NG4fls) |
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brz,pn %o0, 1f |
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LZCNT_O0_G2 !lzcnt %o0, %g2 |
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mov 63, %g3 |
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sub %g3, %g2, %o0 |
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1: |
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retl |
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nop |
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ENDPROC(__NG4fls)
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