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div64.h
Package: linux-2.4.20.tar.gz [view]
Upload User: jlfgdled
Upload Date: 2013-04-10
Package Size: 33168k
Code Size: 2k
Category:
Linux-Unix program
Development Platform:
Unix_Linux
- /*
- * Copyright (C) 2000 Maciej W. Rozycki
- *
- * 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/sgidefs.h>
- /*
- * No traps on overflows for any of these...
- */
- #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; })
- #define do_div(n, base) ({
- unsigned long long __quot;
- unsigned long __upper, __low, __high, __mod;
- __quot = (n);
- __high = __quot >> 32;
- __low = __quot;
- __upper = __high;
- if (__high)
- __asm__("divu $0,%z2,%z3"
- : "=h" (__upper), "=l" (__high)
- : "Jr" (__high), "Jr" (base));
- __mod = do_div64_32(__low, __upper, __low, base);
- __quot = __high;
- __quot = __quot << 32 | __low;
- (n) = __quot;
- __mod; })
- #endif /* _ASM_DIV64_H */