Release 4.14 arch/x86/include/asm/arch_hweight.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_HWEIGHT_H
#define _ASM_X86_HWEIGHT_H
#include <asm/cpufeatures.h>
#ifdef CONFIG_64BIT
/* popcnt %edi, %eax */
#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc7"
/* popcnt %rdi, %rax */
#define POPCNT64 ".byte 0xf3,0x48,0x0f,0xb8,0xc7"
#define REG_IN "D"
#define REG_OUT "a"
#else
/* popcnt %eax, %eax */
#define POPCNT32 ".byte 0xf3,0x0f,0xb8,0xc0"
#define REG_IN "a"
#define REG_OUT "a"
#endif
#define __HAVE_ARCH_SW_HWEIGHT
static __always_inline unsigned int __arch_hweight32(unsigned int w)
{
unsigned int res;
asm (ALTERNATIVE("call __sw_hweight32", POPCNT32, X86_FEATURE_POPCNT)
: "="REG_OUT (res)
: REG_IN (w));
return res;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 19 | 95.00% | 2 | 66.67% |
| Denys Vlasenko | 1 | 5.00% | 1 | 33.33% |
| Total | 20 | 100.00% | 3 | 100.00% |
static inline unsigned int __arch_hweight16(unsigned int w)
{
return __arch_hweight32(w & 0xffff);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
static inline unsigned int __arch_hweight8(unsigned int w)
{
return __arch_hweight32(w & 0xff);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
#ifdef CONFIG_X86_32
static inline unsigned long __arch_hweight64(__u64 w)
{
return __arch_hweight32((u32)w) +
__arch_hweight32((u32)(w >> 32));
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 31 | 96.88% | 1 | 50.00% |
| Denys Vlasenko | 1 | 3.12% | 1 | 50.00% |
| Total | 32 | 100.00% | 2 | 100.00% |
#else
static __always_inline unsigned long __arch_hweight64(__u64 w)
{
unsigned long res;
asm (ALTERNATIVE("call __sw_hweight64", POPCNT64, X86_FEATURE_POPCNT)
: "="REG_OUT (res)
: REG_IN (w));
return res;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Denys Vlasenko | 14 | 73.68% | 1 | 33.33% |
| Borislav Petkov | 5 | 26.32% | 2 | 66.67% |
| Total | 19 | 100.00% | 3 | 100.00% |
#endif /* CONFIG_X86_32 */
#endif
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Borislav Petkov | 144 | 83.72% | 3 | 50.00% |
| Denys Vlasenko | 22 | 12.79% | 1 | 16.67% |
| H. Peter Anvin | 5 | 2.91% | 1 | 16.67% |
| Greg Kroah-Hartman | 1 | 0.58% | 1 | 16.67% |
| Total | 172 | 100.00% | 6 | 100.00% |
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.