1 // Copyright 2012 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package cgotest 6 7 /* 8 // libgcc on ARM might be compiled as thumb code, but our 5l 9 // can't handle that, so we have to disable this test on arm. 10 #ifdef __ARMEL__ 11 #include <stdio.h> 12 int vabs(int x) { 13 puts("testLibgcc is disabled on ARM because 5l cannot handle thumb library."); 14 return (x < 0) ? -x : x; 15 } 16 #elif defined(__arm64__) && defined(__clang__) 17 #include <stdio.h> 18 int vabs(int x) { 19 puts("testLibgcc is disabled on ARM64 with clang due to lack of libgcc."); 20 return (x < 0) ? -x : x; 21 } 22 #else 23 int __absvsi2(int); // dummy prototype for libgcc function 24 // we shouldn't name the function abs, as gcc might use 25 // the builtin one. 26 int vabs(int x) { return __absvsi2(x); } 27 #endif 28 */ 29 import "C" 30 31 import "testing" 32 33 func testLibgcc(t *testing.T) { 34 var table = []struct { 35 in, out C.int 36 }{ 37 {0, 0}, 38 {1, 1}, 39 {-42, 42}, 40 {1000300, 1000300}, 41 {1 - 1<<31, 1<<31 - 1}, 42 } 43 for _, v := range table { 44 if o := C.vabs(v.in); o != v.out { 45 t.Fatalf("abs(%d) got %d, should be %d", v.in, o, v.out) 46 return 47 } 48 } 49 } 50
