linux/lib/math/test_mul_u64_u64_div_u64.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2024 BayLibre SAS
 */

#define pr_fmt(fmt) …

#include <linux/init.h>
#include <linux/module.h>
#include <linux/printk.h>
#include <linux/math64.h>

test_params;

static test_params test_values[] = …;

/*
 * The above table can be verified with the following shell script:
 *
 * #!/bin/sh
 * sed -ne 's/^{ \+\(.*\), \+\(.*\), \+\(.*\), \+\(.*\) },$/\1 \2 \3 \4/p' \
 *     lib/math/test_mul_u64_u64_div_u64.c |
 * while read a b c r; do
 *   expected=$( printf "obase=16; ibase=16; %X * %X / %X\n" $a $b $c | bc )
 *   given=$( printf "%X\n" $r )
 *   if [ "$expected" = "$given" ]; then
 *     echo "$a * $b / $c = $r OK"
 *   else
 *     echo "$a * $b / $c = $r is wrong" >&2
 *     echo "should be equivalent to 0x$expected" >&2
 *     exit 1
 *   fi
 * done
 */

static int __init test_init(void)
{ … }

static void __exit test_exit(void)
{ … }

module_init(…) …;
module_exit(test_exit);

MODULE_AUTHOR(…) …;
MODULE_LICENSE(…) …;
MODULE_DESCRIPTION(…) …;