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// Copyright 2012 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.
package cgotest
/*
// libgcc on ARM might be compiled as thumb code, but our 5l
// can't handle that, so we have to disable this test on arm.
#ifdef __ARMEL__
#include <stdio.h>
int vabs(int x) {
puts("testLibgcc is disabled on ARM because 5l cannot handle thumb library.");
return (x < 0) ? -x : x;
}
#elif defined(__arm64__) && defined(__clang__)
#include <stdio.h>
int vabs(int x) {
puts("testLibgcc is disabled on ARM64 with clang due to lack of libgcc.");
return (x < 0) ? -x : x;
}
#else
int __absvsi2(int); // dummy prototype for libgcc function
// we shouldn't name the function abs, as gcc might use
// the builtin one.
int vabs(int x) { return __absvsi2(x); }
#endif
*/
import "C"
import "testing"
func testLibgcc(t *testing.T) {
var table = []struct {
in, out C.int
}{
{0, 0},
{1, 1},
{-42, 42},
{1000300, 1000300},
{1 - 1<<31, 1<<31 - 1},
}
for _, v := range table {
if o := C.vabs(v.in); o != v.out {
t.Fatalf("abs(%d) got %d, should be %d", v.in, o, v.out)
return
}
}
}
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