69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2000, 2004 Maciej W. Rozycki
|
||
|
|
* Copyright (C) 2003, 07 Ralf Baechle (ralf@linux-mips.org)
|
||
|
|
*
|
||
|
|
* This file is subject to the terms and conditions of the GNU General Public
|
||
|
|
* License. See the file "COPYING" in the main directory of this archive
|
||
|
|
* for more details.
|
||
|
|
*/
|
||
|
|
#ifndef __ASM_DIV64_H
|
||
|
|
#define __ASM_DIV64_H
|
||
|
|
|
||
|
|
#include <asm-generic/div64.h>
|
||
|
|
|
||
|
|
#if BITS_PER_LONG == 64
|
||
|
|
|
||
|
|
#include <linux/types.h>
|
||
|
|
|
||
|
|
/*
|
||
|
|
* No traps on overflows for any of these...
|
||
|
|
*/
|
||
|
|
|
||
|
|
#define __div64_32(n, base) \
|
||
|
|
({ \
|
||
|
|
unsigned long __cf, __tmp, __tmp2, __i; \
|
||
|
|
unsigned long __quot32, __mod32; \
|
||
|
|
unsigned long __high, __low; \
|
||
|
|
unsigned long long __n; \
|
||
|
|
\
|
||
|
|
__high = *__n >> 32; \
|
||
|
|
__low = __n; \
|
||
|
|
__asm__( \
|
||
|
|
" .set push \n" \
|
||
|
|
" .set noat \n" \
|
||
|
|
" .set noreorder \n" \
|
||
|
|
" move %2, $0 \n" \
|
||
|
|
" move %3, $0 \n" \
|
||
|
|
" b 1f \n" \
|
||
|
|
" li %4, 0x21 \n" \
|
||
|
|
"0: \n" \
|
||
|
|
" sll $1, %0, 0x1 \n" \
|
||
|
|
" srl %3, %0, 0x1f \n" \
|
||
|
|
" or %0, $1, %5 \n" \
|
||
|
|
" sll %1, %1, 0x1 \n" \
|
||
|
|
" sll %2, %2, 0x1 \n" \
|
||
|
|
"1: \n" \
|
||
|
|
" bnez %3, 2f \n" \
|
||
|
|
" sltu %5, %0, %z6 \n" \
|
||
|
|
" bnez %5, 3f \n" \
|
||
|
|
"2: \n" \
|
||
|
|
" addiu %4, %4, -1 \n" \
|
||
|
|
" subu %0, %0, %z6 \n" \
|
||
|
|
" addiu %2, %2, 1 \n" \
|
||
|
|
"3: \n" \
|
||
|
|
" bnez %4, 0b\n\t" \
|
||
|
|
" srl %5, %1, 0x1f\n\t" \
|
||
|
|
" .set pop" \
|
||
|
|
: "=&r" (__mod32), "=&r" (__tmp), \
|
||
|
|
"=&r" (__quot32), "=&r" (__cf), \
|
||
|
|
"=&r" (__i), "=&r" (__tmp2) \
|
||
|
|
: "Jr" (base), "0" (__high), "1" (__low)); \
|
||
|
|
\
|
||
|
|
(__n) = __quot32; \
|
||
|
|
__mod32; \
|
||
|
|
})
|
||
|
|
|
||
|
|
#endif /* BITS_PER_LONG == 64 */
|
||
|
|
|
||
|
|
#endif /* __ASM_DIV64_H */
|