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<?php $a = INF; $n = pow(2,64); var_dump( $a/$n ); // floating point div with non-zero value echo $a - ($n * (int) ($a/$n) ),"\n"; // INF but s/b NAN echo fmod(INF,pow(2,64)),"\n"; // NAN correct! echo INF % pow(2,64); // integer div b/c % so pow(2,64) becomes 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/2ZjTO
function name:  (null)
number of ops:  33
compiled vars:  !0 = $a, !1 = $n
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, INF
    3     1        INIT_FCALL                                               'pow'
          2        SEND_VAL                                                 2
          3        SEND_VAL                                                 64
          4        DO_ICALL                                         $3      
          5        ASSIGN                                                   !1, $3
    5     6        INIT_FCALL                                               'var_dump'
          7        DIV                                              ~5      !0, !1
          8        SEND_VAL                                                 ~5
          9        DO_ICALL                                                 
    7    10        DIV                                              ~7      !0, !1
         11        CAST                                          4  ~8      ~7
         12        MUL                                              ~9      !1, ~8
         13        SUB                                              ~10     !0, ~9
         14        ECHO                                                     ~10
         15        ECHO                                                     '%0A'
   10    16        INIT_FCALL                                               'fmod'
         17        SEND_VAL                                                 INF
         18        INIT_FCALL                                               'pow'
         19        SEND_VAL                                                 2
         20        SEND_VAL                                                 64
         21        DO_ICALL                                         $11     
         22        SEND_VAR                                                 $11
         23        DO_ICALL                                         $12     
         24        ECHO                                                     $12
         25        ECHO                                                     '%0A'
   12    26        INIT_FCALL                                               'pow'
         27        SEND_VAL                                                 2
         28        SEND_VAL                                                 64
         29        DO_ICALL                                         $13     
         30        MOD                                              ~14     INF, $13
         31        ECHO                                                     ~14
         32      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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