tools/testing/selftests/powerpc/pmu/loop.S

File Facts

System

Linux kernel

Corpus path

tools/testing/selftests/powerpc/pmu/loop.S

Extension

.S

Size

1300 bytes

Lines

79

Domain

Support Tooling And Documentation

Bucket

tools

Inferred role

Support Tooling And Documentation: tools

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

• ppc-asm.h

Detected Declarations

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

Annotated Snippet

#include <ppc-asm.h>

	.text

FUNC_START(thirty_two_instruction_loop)
	cmpdi	r3,0
	beqlr
	addi	r4,r3,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1
	addi	r4,r4,1	# 28 addi's
	subi	r3,r3,1
	b	FUNC_NAME(thirty_two_instruction_loop)
FUNC_END(thirty_two_instruction_loop)

FUNC_START(thirty_two_instruction_loop_with_ll_sc)
	cmpdi	r3,0
	beqlr
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1		# 5
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
1:	ldarx	r6,0,r4		# 10
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1		# 15
	addi	r5,r5,1
	addi	r5,r5,1
	stdcx.	r6,0,r4
	bne-	1b
	addi	r5,r5,1		# 20
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1		# 25
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1
	addi	r5,r5,1		# 30

Annotation

• Immediate include surface: `ppc-asm.h`.
• Atlas domain: Support Tooling And Documentation / tools.
• 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.