div64.h
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:1k
- /*
- * 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
- /*
- * Don't use this one in new code
- */
- #define do_div64_32(res, high, low, base) ({
- unsigned long __quot, __mod;
- unsigned long __cf, __tmp, __tmp2, __i;
-
- __asm__(".set pushnt"
- ".set noatnt"
- ".set noreordernt"
- "move %2, $0nt"
- "move %3, $0nt"
- "b 1fnt"
- " li %4, 0x21n"
- "0:nt"
- "sll $1, %0, 0x1nt"
- "srl %3, %0, 0x1fnt"
- "or %0, $1, %5nt"
- "sll %1, %1, 0x1nt"
- "sll %2, %2, 0x1n"
- "1:nt"
- "bnez %3, 2fnt"
- "sltu %5, %0, %z6nt"
- "bnez %5, 3fnt"
- "2:nt"
- " addiu %4,%4,-1nt"
- "subu %0, %0, %z6nt"
- "addiu %2, %2, 1n"
- "3:nt"
- "bnez %4, 0bnt"
- " srl %5, %1, 0x1fnt"
- ".set pop"
- : "=&r" (__mod), "=&r" (__tmp), "=&r" (__quot), "=&r" (__cf),
- "=&r" (__i), "=&r" (__tmp2)
- : "Jr" (base), "0" (high), "1" (low));
-
- (res) = __quot;
- __mod; })
- /*
- * Hey, we're already 64-bit, no
- * need to play games..
- */
- #define do_div(n,base) ({
- int __res;
- __res = ((unsigned long) n) % (unsigned) base;
- n = ((unsigned long) n) / (unsigned) base;
- __res; })
- #endif /* _ASM_DIV64_H */