include/asm-s390/div64.h

   1 #ifndef __S390_DIV64
   2 #define __S390_DIV64
   3
   4 #ifndef __s390x__
   5
   6 /* for do_div "base" needs to be smaller than 2^31-1 */
   7 #define do_div(n, base) ({                                      \
   8         unsigned long long __n = (n);                           \
   9         unsigned long __r;                                      \
  10                                                                 \
  11         asm ("   slr  0,0\n"                                    \
  12              "   l    1,%1\n"                                   \
  13              "   srdl 0,1\n"                                    \
  14              "   dr   0,%2\n"                                   \
  15              "   alr  1,1\n"                                    \
  16              "   alr  0,0\n"                                    \
  17              "   lhi  2,1\n"                                    \
  18              "   n    2,%1\n"                                   \
  19              "   alr  0,2\n"                                    \
  20              "   clr  0,%2\n"                                   \
  21              "   jl   0f\n"                                     \
  22              "   slr  0,%2\n"                                   \
  23              "   ahi  1,1\n"                                    \
  24              "0: st   1,%1\n"                                   \
  25              "   l    1,4+%1\n"                                 \
  26              "   srdl 0,1\n"                                    \
  27              "   dr   0,%2\n"                                   \
  28              "   alr  1,1\n"                                    \
  29              "   alr  0,0\n"                                    \
  30              "   lhi  2,1\n"                                    \
  31              "   n    2,4+%1\n"                                 \
  32              "   alr  0,2\n"                                    \
  33              "   clr  0,%2\n"                                   \
  34              "   jl   1f\n"                                     \
  35              "   slr  0,%2\n"                                   \
  36              "   ahi  1,1\n"                                    \
  37              "1: st   1,4+%1\n"                                 \
  38              "   lr   %0,0"                                     \
  39              : "=d" (__r), "=m" (__n)                           \
  40              : "d" (base), "m" (__n) : "0", "1", "2", "cc" );   \
  41         (n) = (__n);                                            \
  42         __r;                                                    \
  43 })
  44
  45 #else /* __s390x__ */
  46 #include <asm-generic/div64.h>
  47 #endif /* __s390x__ */
  48
  49 #endif