/usr/arm-linux-androideabi/include/asm/div64.h is in gcc-arm-linux-androideabi 0.20130705.1-0ubuntu7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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****************************************************************************
***
*** This header was automatically generated from a Linux kernel header
*** of the same name, to make information necessary for userspace to
*** call into the kernel available to libc. It contains only constants,
*** structures, and macros generated from the original header, and thus,
*** contains no copyrightable information.
***
*** To edit the content of this header, modify the corresponding
*** source file (e.g. under external/kernel-headers/original/) then
*** run bionic/libc/kernel/tools/update_all.py
***
*** Any manual change here will be lost the next time this script will
*** be run. You've been warned!
***
****************************************************************************
****************************************************************************/
#ifndef __ASM_ARM_DIV64
#define __ASM_ARM_DIV64
#include <asm/system.h>
#ifdef __ARMEB__
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define __xh "r0"
#define __xl "r1"
#else
#define __xl "r0"
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define __xh "r1"
#endif
#define do_div(n,base) ({ register unsigned int __base asm("r4") = base; register unsigned long long __n asm("r0") = n; register unsigned long long __res asm("r2"); register unsigned int __rem asm(__xh); asm( __asmeq("%0", __xh) __asmeq("%1", "r2") __asmeq("%2", "r0") __asmeq("%3", "r4") "bl __do_div64" : "=r" (__rem), "=r" (__res) : "r" (__n), "r" (__base) : "ip", "lr", "cc"); n = __res; __rem; })
#endif
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
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