1 // run 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 // Test shift. 8 9 package main 10 11 var ians [18]int; 12 var uans [18]uint; 13 var pass string; 14 15 func 16 testi(i int, t1,t2,t3 int) { 17 n := ((t1*3) + t2)*2 + t3; 18 if i != ians[n] { 19 print("itest ", t1,t2,t3,pass, 20 " is ", i, " sb ", ians[n], "\n"); 21 } 22 } 23 24 func 25 index(t1,t2,t3 int) int { 26 return ((t1*3) + t2)*2 + t3; 27 } 28 29 func 30 testu(u uint, t1,t2,t3 int) { 31 n := index(t1,t2,t3); 32 if u != uans[n] { 33 print("utest ", t1,t2,t3,pass, 34 " is ", u, " sb ", uans[n], "\n"); 35 } 36 } 37 38 func 39 main() { 40 var i int; 41 var u,c uint; 42 43 /* 44 * test constant evaluations 45 */ 46 pass = "con"; // constant part 47 48 testi( int(1234) << 0, 0,0,0); 49 testi( int(1234) >> 0, 0,0,1); 50 testi( int(1234) << 5, 0,1,0); 51 testi( int(1234) >> 5, 0,1,1); 52 53 testi(int(-1234) << 0, 1,0,0); 54 testi(int(-1234) >> 0, 1,0,1); 55 testi(int(-1234) << 5, 1,1,0); 56 testi(int(-1234) >> 5, 1,1,1); 57 58 testu(uint(5678) << 0, 2,0,0); 59 testu(uint(5678) >> 0, 2,0,1); 60 testu(uint(5678) << 5, 2,1,0); 61 testu(uint(5678) >> 5, 2,1,1); 62 63 /* 64 * test variable evaluations 65 */ 66 pass = "var"; // variable part 67 68 for t1:=0; t1<3; t1++ { // +int, -int, uint 69 for t2:=0; t2<3; t2++ { // 0, +small, +large 70 for t3:=0; t3<2; t3++ { // <<, >> 71 switch t1 { 72 case 0: i = 1234; 73 case 1: i = -1234; 74 case 2: u = 5678; 75 } 76 switch t2 { 77 case 0: c = 0; 78 case 1: c = 5; 79 case 2: c = 1025; 80 } 81 switch t3 { 82 case 0: i <<= c; u <<= c; 83 case 1: i >>= c; u >>= c; 84 } 85 switch t1 { 86 case 0: testi(i,t1,t2,t3); 87 case 1: testi(i,t1,t2,t3); 88 case 2: testu(u,t1,t2,t3); 89 } 90 } 91 } 92 } 93 } 94 95 func 96 init() { 97 /* 98 * set the 'correct' answer 99 */ 100 101 ians[index(0,0,0)] = 1234; 102 ians[index(0,0,1)] = 1234; 103 ians[index(0,1,0)] = 39488; 104 ians[index(0,1,1)] = 38; 105 ians[index(0,2,0)] = 0; 106 ians[index(0,2,1)] = 0; 107 108 ians[index(1,0,0)] = -1234; 109 ians[index(1,0,1)] = -1234; 110 ians[index(1,1,0)] = -39488; 111 ians[index(1,1,1)] = -39; 112 ians[index(1,2,0)] = 0; 113 ians[index(1,2,1)] = -1; 114 115 uans[index(2,0,0)] = 5678; 116 uans[index(2,0,1)] = 5678; 117 uans[index(2,1,0)] = 181696; 118 uans[index(2,1,1)] = 177; 119 uans[index(2,2,0)] = 0; 120 uans[index(2,2,1)] = 0; 121 } 122
