Contributors: 3
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Heiko Carstens |
283 |
98.61% |
1 |
33.33% |
| Vasily Gorbik |
3 |
1.05% |
1 |
33.33% |
| Greg Kroah-Hartman |
1 |
0.35% |
1 |
33.33% |
| Total |
287 |
|
3 |
|
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_S390_ARCH_HWEIGHT_H
#define _ASM_S390_ARCH_HWEIGHT_H
#include <linux/types.h>
static __always_inline unsigned long popcnt_z196(unsigned long w)
{
unsigned long cnt;
asm volatile(".insn rrf,0xb9e10000,%[cnt],%[w],0,0"
: [cnt] "=d" (cnt)
: [w] "d" (w)
: "cc");
return cnt;
}
static __always_inline unsigned long popcnt_z15(unsigned long w)
{
unsigned long cnt;
asm volatile(".insn rrf,0xb9e10000,%[cnt],%[w],8,0"
: [cnt] "=d" (cnt)
: [w] "d" (w)
: "cc");
return cnt;
}
static __always_inline unsigned long __arch_hweight64(__u64 w)
{
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z15_FEATURES))
return popcnt_z15(w);
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z196_FEATURES)) {
w = popcnt_z196(w);
w += w >> 32;
w += w >> 16;
w += w >> 8;
return w & 0xff;
}
return __sw_hweight64(w);
}
static __always_inline unsigned int __arch_hweight32(unsigned int w)
{
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z15_FEATURES))
return popcnt_z15(w);
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z196_FEATURES)) {
w = popcnt_z196(w);
w += w >> 16;
w += w >> 8;
return w & 0xff;
}
return __sw_hweight32(w);
}
static __always_inline unsigned int __arch_hweight16(unsigned int w)
{
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z15_FEATURES))
return popcnt_z15((unsigned short)w);
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z196_FEATURES)) {
w = popcnt_z196(w);
w += w >> 8;
return w & 0xff;
}
return __sw_hweight16(w);
}
static __always_inline unsigned int __arch_hweight8(unsigned int w)
{
if (IS_ENABLED(CONFIG_HAVE_MARCH_Z196_FEATURES))
return popcnt_z196((unsigned char)w);
return __sw_hweight8(w);
}
#endif /* _ASM_S390_ARCH_HWEIGHT_H */