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| // run
|
| // Copyright 2009 The Go Authors. All rights reserved.
| // Use of this source code is governed by a BSD-style
| // license that can be found in the LICENSE file.
|
| // Test shift.
|
| package main
|
| var ians [18]int;
| var uans [18]uint;
| var pass string;
|
| func
| testi(i int, t1,t2,t3 int) {
| n := ((t1*3) + t2)*2 + t3;
| if i != ians[n] {
| print("itest ", t1,t2,t3,pass,
| " is ", i, " sb ", ians[n], "\n");
| }
| }
|
| func
| index(t1,t2,t3 int) int {
| return ((t1*3) + t2)*2 + t3;
| }
|
| func
| testu(u uint, t1,t2,t3 int) {
| n := index(t1,t2,t3);
| if u != uans[n] {
| print("utest ", t1,t2,t3,pass,
| " is ", u, " sb ", uans[n], "\n");
| }
| }
|
| func
| main() {
| var i int;
| var u,c uint;
|
| /*
| * test constant evaluations
| */
| pass = "con"; // constant part
|
| testi( int(1234) << 0, 0,0,0);
| testi( int(1234) >> 0, 0,0,1);
| testi( int(1234) << 5, 0,1,0);
| testi( int(1234) >> 5, 0,1,1);
|
| testi(int(-1234) << 0, 1,0,0);
| testi(int(-1234) >> 0, 1,0,1);
| testi(int(-1234) << 5, 1,1,0);
| testi(int(-1234) >> 5, 1,1,1);
|
| testu(uint(5678) << 0, 2,0,0);
| testu(uint(5678) >> 0, 2,0,1);
| testu(uint(5678) << 5, 2,1,0);
| testu(uint(5678) >> 5, 2,1,1);
|
| /*
| * test variable evaluations
| */
| pass = "var"; // variable part
|
| for t1:=0; t1<3; t1++ { // +int, -int, uint
| for t2:=0; t2<3; t2++ { // 0, +small, +large
| for t3:=0; t3<2; t3++ { // <<, >>
| switch t1 {
| case 0: i = 1234;
| case 1: i = -1234;
| case 2: u = 5678;
| }
| switch t2 {
| case 0: c = 0;
| case 1: c = 5;
| case 2: c = 1025;
| }
| switch t3 {
| case 0: i <<= c; u <<= c;
| case 1: i >>= c; u >>= c;
| }
| switch t1 {
| case 0: testi(i,t1,t2,t3);
| case 1: testi(i,t1,t2,t3);
| case 2: testu(u,t1,t2,t3);
| }
| }
| }
| }
| }
|
| func
| init() {
| /*
| * set the 'correct' answer
| */
|
| ians[index(0,0,0)] = 1234;
| ians[index(0,0,1)] = 1234;
| ians[index(0,1,0)] = 39488;
| ians[index(0,1,1)] = 38;
| ians[index(0,2,0)] = 0;
| ians[index(0,2,1)] = 0;
|
| ians[index(1,0,0)] = -1234;
| ians[index(1,0,1)] = -1234;
| ians[index(1,1,0)] = -39488;
| ians[index(1,1,1)] = -39;
| ians[index(1,2,0)] = 0;
| ians[index(1,2,1)] = -1;
|
| uans[index(2,0,0)] = 5678;
| uans[index(2,0,1)] = 5678;
| uans[index(2,1,0)] = 181696;
| uans[index(2,1,1)] = 177;
| uans[index(2,2,0)] = 0;
| uans[index(2,2,1)] = 0;
| }
|
|
