arch/sparc/lib/lshrdi3.S

File Facts

System

Linux kernel

Corpus path

arch/sparc/lib/lshrdi3.S

Extension

.S

Size

405 bytes

Lines

31

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.

• CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.
• Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.

Dependency Surface

• linux/export.h
• linux/linkage.h

Detected Declarations

• export __lshrdi3

Annotated Snippet

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

ENTRY(__lshrdi3)
	cmp	%o2, 0
	be	3f
	 mov	0x20, %g2

	sub	%g2, %o2, %g2
	cmp	%g2, 0
	bg	1f
	 srl	%o0, %o2, %o4

	clr	%o4
	neg	%g2
	b	2f
	 srl	%o0, %g2, %o5
1:
	sll  %o0, %g2, %g3
	srl  %o1, %o2, %g2
	or  %g2, %g3, %o5
2:
	mov  %o4, %o0
	mov  %o5, %o1
3:
	retl 
	 nop 
ENDPROC(__lshrdi3)
EXPORT_SYMBOL(__lshrdi3)

Annotation

• Immediate include surface: `linux/export.h`, `linux/linkage.h`.
• Detected declarations: `export __lshrdi3`.
• Atlas domain: Architecture Layer / arch/sparc.
• Implementation status: integration implementation candidate.

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.