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2b41ce5df2
Defined SPARC optimized __fls using lzcnt opcode. Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
31 lines
495 B
ArmAsm
31 lines
495 B
ArmAsm
/* 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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