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Linux/include/asm-s390/div64.h

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  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) : "", "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
 50 

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