| /* |
| * Copyright (C) 2000, 2004 Maciej W. Rozycki |
| * Copyright (C) 2003, 07 Ralf Baechle ([email protected]) |
| * |
| * 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 */ |
