arch/x86/include/asm/simd.h

File Facts

System

Linux kernel

Corpus path

arch/x86/include/asm/simd.h

Extension

.h

Size

417 bytes

Lines

19

Domain

Architecture Layer

Bucket

arch/x86

Inferred role

Architecture Layer: implementation source

Status

source 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.

Dependency Surface

• asm/fpu/api.h
• linux/compiler_attributes.h
• linux/types.h

Detected Declarations

• function may_use_simd

Annotated Snippet

#ifndef _ASM_SIMD_H
#define _ASM_SIMD_H

#include <asm/fpu/api.h>
#include <linux/compiler_attributes.h>
#include <linux/types.h>

/*
 * may_use_simd - whether it is allowable at this time to issue SIMD
 *                instructions or access the SIMD register file
 */
static __must_check inline bool may_use_simd(void)
{
	return irq_fpu_usable();
}

#endif	/* _ASM_SIMD_H */

Annotation

• Immediate include surface: `asm/fpu/api.h`, `linux/compiler_attributes.h`, `linux/types.h`.
• Detected declarations: `function may_use_simd`.
• Atlas domain: Architecture Layer / arch/x86.
• Implementation status: source 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.