5c7dd7acc3
repo: https://github.com/T-head-Semi/linux commit: b1313fe517ca3703119dcc99ef3bbf75ab42bcfb Change-Id: I6cbb35294024ea3a66140e311f4bb705fd7fd626
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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