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https://github.com/torvalds/linux
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115 lines
2.4 KiB
ArmAsm
115 lines
2.4 KiB
ArmAsm
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* Copyright (C) IBM Corporation, 2010
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*
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* Author: Anton Blanchard <anton@au.ibm.com>
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*/
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#include <asm/processor.h>
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#include <asm/ppc_asm.h>
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#include <asm/export.h>
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/* Note: This code relies on -mminimal-toc */
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_GLOBAL(__arch_hweight8)
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BEGIN_FTR_SECTION
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b __sw_hweight8
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nop
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nop
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FTR_SECTION_ELSE
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PPC_POPCNTB(R3,R3)
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clrldi r3,r3,64-8
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blr
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
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EXPORT_SYMBOL(__arch_hweight8)
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_GLOBAL(__arch_hweight16)
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BEGIN_FTR_SECTION
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b __sw_hweight16
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nop
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nop
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nop
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nop
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FTR_SECTION_ELSE
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BEGIN_FTR_SECTION_NESTED(50)
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PPC_POPCNTB(R3,R3)
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srdi r4,r3,8
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add r3,r4,r3
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clrldi r3,r3,64-8
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blr
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FTR_SECTION_ELSE_NESTED(50)
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clrlwi r3,r3,16
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PPC_POPCNTW(R3,R3)
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clrldi r3,r3,64-8
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blr
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ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 50)
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
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EXPORT_SYMBOL(__arch_hweight16)
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_GLOBAL(__arch_hweight32)
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BEGIN_FTR_SECTION
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b __sw_hweight32
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nop
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nop
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nop
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nop
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nop
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nop
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FTR_SECTION_ELSE
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BEGIN_FTR_SECTION_NESTED(51)
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PPC_POPCNTB(R3,R3)
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srdi r4,r3,16
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add r3,r4,r3
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srdi r4,r3,8
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add r3,r4,r3
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clrldi r3,r3,64-8
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blr
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FTR_SECTION_ELSE_NESTED(51)
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PPC_POPCNTW(R3,R3)
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clrldi r3,r3,64-8
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blr
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ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 51)
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
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EXPORT_SYMBOL(__arch_hweight32)
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_GLOBAL(__arch_hweight64)
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BEGIN_FTR_SECTION
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b __sw_hweight64
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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nop
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FTR_SECTION_ELSE
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BEGIN_FTR_SECTION_NESTED(52)
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PPC_POPCNTB(R3,R3)
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srdi r4,r3,32
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add r3,r4,r3
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srdi r4,r3,16
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add r3,r4,r3
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srdi r4,r3,8
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add r3,r4,r3
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clrldi r3,r3,64-8
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blr
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FTR_SECTION_ELSE_NESTED(52)
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PPC_POPCNTD(R3,R3)
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clrldi r3,r3,64-8
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blr
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ALT_FTR_SECTION_END_NESTED_IFCLR(CPU_FTR_POPCNTD, 52)
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ALT_FTR_SECTION_END_IFCLR(CPU_FTR_POPCNTB)
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EXPORT_SYMBOL(__arch_hweight64)
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