arch/sparc/lib/NG4fls.S

File Facts

System

Linux kernel

Corpus path

arch/sparc/lib/NG4fls.S

Extension

.S

Size

495 bytes

Lines

31

Domain

Architecture Layer

Bucket

arch/sparc

Inferred role

Architecture Layer: arch/sparc

Status

atlas-only

Why This File Exists

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

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

Dependency Surface

• linux/linkage.h

Detected Declarations

• No top-level syscall, struct, function, initcall, or export declaration detected by the generator.

Annotated Snippet

#include <linux/linkage.h>

#define LZCNT_O0_G2	\
	.word	0x85b002e8

	.text
	.register	%g2, #scratch
	.register	%g3, #scratch

ENTRY(NG4fls)
	LZCNT_O0_G2	!lzcnt	%o0, %g2
	mov	64, %g3
	retl
	 sub	%g3, %g2, %o0
ENDPROC(NG4fls)

ENTRY(__NG4fls)
	brz,pn	%o0, 1f
	LZCNT_O0_G2	!lzcnt	%o0, %g2
	mov	63, %g3
	sub	%g3, %g2, %o0
1:
	retl
	 nop
ENDPROC(__NG4fls)

Annotation

• Immediate include surface: `linux/linkage.h`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: atlas-only.

Implementation Notes

• This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
• Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
• Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.