Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _ASM_X86_HWEIGHT_H
|
|
#define _ASM_X86_HWEIGHT_H
|
|
|
|
#include <asm/cpufeatures.h>
|
|
|
|
#ifdef CONFIG_64BIT
|
|
#define REG_IN "D"
|
|
#define REG_OUT "a"
|
|
#else
|
|
#define REG_IN "a"
|
|
#define REG_OUT "a"
|
|
#endif
|
|
|
|
static __always_inline unsigned int __arch_hweight32(unsigned int w)
|
|
{
|
|
unsigned int res;
|
|
|
|
asm_inline (ALTERNATIVE("call __sw_hweight32",
|
|
"popcntl %[val], %[cnt]", X86_FEATURE_POPCNT)
|
|
: [cnt] "=" REG_OUT (res), ASM_CALL_CONSTRAINT
|
|
: [val] REG_IN (w));
|
|
|
|
return res;
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight16(unsigned int w)
|
|
{
|
|
return __arch_hweight32(w & 0xffff);
|
|
}
|
|
|
|
static inline unsigned int __arch_hweight8(unsigned int w)
|
|
{
|
|
return __arch_hweight32(w & 0xff);
|
|
}
|
|
|
|
#ifdef CONFIG_X86_32
|
|
static inline unsigned long __arch_hweight64(__u64 w)
|
|
{
|
|
return __arch_hweight32((u32)w) +
|
|
__arch_hweight32((u32)(w >> 32));
|
|
}
|
|
#else
|
|
static __always_inline unsigned long __arch_hweight64(__u64 w)
|
|
{
|
|
unsigned long res;
|
|
|
|
asm_inline (ALTERNATIVE("call __sw_hweight64",
|
|
"popcntq %[val], %[cnt]", X86_FEATURE_POPCNT)
|
|
: [cnt] "=" REG_OUT (res), ASM_CALL_CONSTRAINT
|
|
: [val] REG_IN (w));
|
|
|
|
return res;
|
|
}
|
|
#endif /* CONFIG_X86_32 */
|
|
|
|
#endif
|