mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-13 14:25:32 +00:00
58 lines
1.2 KiB
C
58 lines
1.2 KiB
C
/*
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* Copyright 2016 The Emscripten Authors. All rights reserved.
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* Emscripten is available under two separate licenses, the MIT license and the
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* University of Illinois/NCSA Open Source License. Both these licenses can be
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* found in the LICENSE file.
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*/
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#include <stdio.h>
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#include <math.h>
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// test copysign of 0
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int __attribute__((noinline))
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copysign_bug (double x)
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{
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if (x != 0.0 && (x * 0.5 == x)) {
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printf("1\n");
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return 1;
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}
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printf("f: %f\n", x);
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if (__builtin_copysign(1.0, x) < 0.0) {
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printf("2\n");
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return 2;
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} else {
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printf("3\n");
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return 3;
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}
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}
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int main() {
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#define TEST(x, y) printf("%.2f, %.2f ==> %.2f\n", x, y, copysign(x, y));
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TEST(5.0f, 5.0f);
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TEST(5.0f, -5.0f);
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TEST(-5.0f, 5.0f);
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TEST(-5.0f, -5.0f);
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TEST(5.0f, 4.0f);
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TEST(5.0f, -4.0f);
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TEST(-5.0f, 4.0f);
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TEST(-5.0f, -4.0f);
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TEST(0.0f, 5.0f);
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TEST(0.0f, -5.0f);
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TEST(-0.0f, 5.0f);
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TEST(-0.0f, -5.0f);
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TEST(5.0f, 0.0f);
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TEST(5.0f, -0.0f);
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TEST(-5.0f, 0.0f);
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TEST(-5.0f, -0.0f);
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TEST(0.0f, 0.0f);
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TEST(0.0f, -0.0f);
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TEST(-0.0f, 0.0f);
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TEST(-0.0f, -0.0f);
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double x = -0.0;
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if (copysign_bug (x) != 2)
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__builtin_abort ();
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return 0;
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}
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