arch/sh/lib/div64-generic.c

Source file repositories/reference/linux-study-clean/arch/sh/lib/div64-generic.c

File Facts

System
Linux kernel
Corpus path
arch/sh/lib/div64-generic.c
Extension
.c
Size
319 bytes
Lines
21
Domain
Architecture Layer
Bucket
arch/sh
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.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Generic __div64_32 wrapper for __xdiv64_32.
 */

#include <linux/types.h>
#include <asm/div64.h>

extern uint64_t __xdiv64_32(u64 n, u32 d);

uint32_t __div64_32(u64 *xp, u32 y)
{
	uint32_t rem;
	uint64_t q = __xdiv64_32(*xp, y);

	rem = *xp - q * y;
	*xp = q;

	return rem;
}

Annotation

Implementation Notes