gcc/testsuite/go.test/test/ken/shift.go

   1 // $G $D/$F.go && $L $F.$A && ./$A.out
   2
   3 // Copyright 2009 The Go Authors. All rights reserved.
   4 // Use of this source code is governed by a BSD-style
   5 // license that can be found in the LICENSE file.
   6
   7 package main
   8
   9 var     ians    [18]int;
  10 var     uans    [18]uint;
  11 var     pass    string;
  12
  13 func
  14 testi(i int, t1,t2,t3 int) {
  15         n := ((t1*3) + t2)*2 + t3;
  16         if i != ians[n] {
  17                 print("itest ", t1,t2,t3,pass,
  18                         " is ", i, " sb ", ians[n], "\n");
  19         }
  20 }
  21
  22 func
  23 index(t1,t2,t3 int) int {
  24         return ((t1*3) + t2)*2 + t3;
  25 }
  26
  27 func
  28 testu(u uint, t1,t2,t3 int) {
  29         n := index(t1,t2,t3);
  30         if u != uans[n] {
  31                 print("utest ", t1,t2,t3,pass,
  32                         " is ", u, " sb ", uans[n], "\n");
  33         }
  34 }
  35
  36 func
  37 main() {
  38         var i int;
  39         var u,c uint;
  40
  41         /*
  42          * test constant evaluations
  43          */
  44         pass = "con";   // constant part
  45
  46         testi( int(1234) <<    0, 0,0,0);
  47         testi( int(1234) >>    0, 0,0,1);
  48         testi( int(1234) <<    5, 0,1,0);
  49         testi( int(1234) >>    5, 0,1,1);
  50
  51         testi(int(-1234) <<    0, 1,0,0);
  52         testi(int(-1234) >>    0, 1,0,1);
  53         testi(int(-1234) <<    5, 1,1,0);
  54         testi(int(-1234) >>    5, 1,1,1);
  55
  56         testu(uint(5678) <<    0, 2,0,0);
  57         testu(uint(5678) >>    0, 2,0,1);
  58         testu(uint(5678) <<    5, 2,1,0);
  59         testu(uint(5678) >>    5, 2,1,1);
  60
  61         /*
  62          * test variable evaluations
  63          */
  64         pass = "var";   // variable part
  65
  66         for t1:=0; t1<3; t1++ { // +int, -int, uint
  67         for t2:=0; t2<3; t2++ { // 0, +small, +large
  68         for t3:=0; t3<2; t3++ { // <<, >>
  69                 switch t1 {
  70                 case 0: i =  1234;
  71                 case 1: i = -1234;
  72                 case 2: u =  5678;
  73                 }
  74                 switch t2 {
  75                 case 0: c =    0;
  76                 case 1: c =    5;
  77                 case 2: c = 1025;
  78                 }
  79                 switch t3 {
  80                 case 0: i <<= c; u <<= c;
  81                 case 1: i >>= c; u >>= c;
  82                 }
  83                 switch t1 {
  84                 case 0: testi(i,t1,t2,t3);
  85                 case 1: testi(i,t1,t2,t3);
  86                 case 2: testu(u,t1,t2,t3);
  87                 }
  88         }
  89         }
  90         }
  91 }
  92
  93 func
  94 init() {
  95         /*
  96          * set the 'correct' answer
  97          */
  98
  99         ians[index(0,0,0)] =   1234;
 100         ians[index(0,0,1)] =   1234;
 101         ians[index(0,1,0)] =  39488;
 102         ians[index(0,1,1)] =     38;
 103         ians[index(0,2,0)] =      0;
 104         ians[index(0,2,1)] =      0;
 105
 106         ians[index(1,0,0)] =  -1234;
 107         ians[index(1,0,1)] =  -1234;
 108         ians[index(1,1,0)] = -39488;
 109         ians[index(1,1,1)] =    -39;
 110         ians[index(1,2,0)] =      0;
 111         ians[index(1,2,1)] =     -1;
 112
 113         uans[index(2,0,0)] =   5678;
 114         uans[index(2,0,1)] =   5678;
 115         uans[index(2,1,0)] = 181696;
 116         uans[index(2,1,1)] =    177;
 117         uans[index(2,2,0)] =      0;
 118         uans[index(2,2,1)] =      0;
 119 }