arch/sparc/lib/hweight.S

Source file repositories/reference/linux-study-clean/arch/sparc/lib/hweight.S

File Facts

System
Linux kernel
Corpus path
arch/sparc/lib/hweight.S
Extension
.S
Size
1181 bytes
Lines
58
Domain
Architecture Layer
Bucket
arch/sparc
Inferred role
Architecture Layer: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

#include <linux/export.h>
#include <linux/linkage.h>

	.text
	.align	32
ENTRY(__arch_hweight8)
	sethi	%hi(__sw_hweight8), %g1
	jmpl	%g1 + %lo(__sw_hweight8), %g0
	 nop
ENDPROC(__arch_hweight8)
EXPORT_SYMBOL(__arch_hweight8)
	.section	.popc_3insn_patch, "ax"
	.word		__arch_hweight8
	sllx		%o0, 64-8, %g1
	retl
	 popc		%g1, %o0
	.previous

ENTRY(__arch_hweight16)
	sethi	%hi(__sw_hweight16), %g1
	jmpl	%g1 + %lo(__sw_hweight16), %g0
	 nop
ENDPROC(__arch_hweight16)
EXPORT_SYMBOL(__arch_hweight16)
	.section	.popc_3insn_patch, "ax"
	.word		__arch_hweight16
	sllx		%o0, 64-16, %g1
	retl
	 popc		%g1, %o0
	.previous

ENTRY(__arch_hweight32)
	sethi	%hi(__sw_hweight32), %g1
	jmpl	%g1 + %lo(__sw_hweight32), %g0
	 nop
ENDPROC(__arch_hweight32)
EXPORT_SYMBOL(__arch_hweight32)
	.section	.popc_3insn_patch, "ax"
	.word		__arch_hweight32
	sllx		%o0, 64-32, %g1
	retl
	 popc		%g1, %o0
	.previous

ENTRY(__arch_hweight64)
	sethi	%hi(__sw_hweight64), %g1
	jmpl	%g1 + %lo(__sw_hweight64), %g0
	 nop
ENDPROC(__arch_hweight64)
EXPORT_SYMBOL(__arch_hweight64)
	.section	.popc_3insn_patch, "ax"
	.word		__arch_hweight64
	retl
	 popc		%o0, %o0
	nop
	.previous

Annotation

Implementation Notes