/*
 * Copyright (C) 2000, 2004, 2021  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/bitsperlong.h>

#if BITS_PER_LONG == 32

/*
 * No traps on overflows for any of these...
 */

#define do_div64_32(res, high, low, base) ({                            \
        unsigned long __cf, __tmp, __tmp2, __i;                         \
        unsigned long __quot32, __mod32;                                \
                                                                        \
        __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"     \
        "        srl    %5, %1, 0x1f                            \n"     \
        "       .set    pop"                                            \
        : "=&r" (__mod32), "=&r" (__tmp),                               \
          "=&r" (__quot32), "=&r" (__cf),                               \
          "=&r" (__i), "=&r" (__tmp2)                                   \
        : "Jr" (base), "0" (high), "1" (low));                          \
                                                                        \
        (res) = __quot32;                                               \
        __mod32;                                                        \
})

#define __div64_32(n, base) ({                                          \
        unsigned long __upper, __low, __high, __radix;                  \
        unsigned long long __quot;                                      \
        unsigned long long __div;                                       \
        unsigned long __mod;                                            \
                                                                        \
        __div = (*n);                                                   \
        __radix = (base);                                               \
                                                                        \
        __high = __div >> 32;                                           \
        __low = __div;                                                  \
                                                                        \
        if (__high < __radix) {                                         \
                __upper = __high;                                       \
                __high = 0;                                             \
        } else {                                                        \
                __upper = __high % __radix;                             \
                __high /= __radix;                                      \
        }                                                               \
                                                                        \
        __mod = do_div64_32(__low, __upper, __low, __radix);            \
                                                                        \
        __quot = __high;                                                \
        __quot = __quot << 32 | __low;                                  \
        (*n) = __quot;                                                  \
        __mod;                                                          \
})

#endif /* BITS_PER_LONG == 32 */

#include <asm-generic/div64.h>

#endif /* __ASM_DIV64_H */