mirror of
https://github.com/fluencelabs/wasmer
synced 2024-12-15 15:15:40 +00:00
77 lines
2.5 KiB
C
77 lines
2.5 KiB
C
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/*
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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 <cassert>
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#include <inttypes.h>
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#include <stdio.h>
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__attribute((noinline)) bool eq(double d, int64_t i) {
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int64_t i2 = (int64_t)d;
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if (i != i2) {
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printf("%.20g converted to int64 returns %lld, not %lld as expected!\n", d,
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i2, i);
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}
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return i == i2;
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}
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int main() {
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assert(eq(0.0, 0));
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assert(eq(-0.0, 0));
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assert(eq(0.1, 0));
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assert(eq(-0.1, 0));
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assert(eq(0.6, 0));
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assert(eq(-0.6, 0));
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assert(eq(1.0, 1));
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assert(eq(-1.0, -1));
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assert(eq(1.1, 1));
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assert(eq(-1.1, -1));
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assert(eq(1.6, 1));
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assert(eq(-1.6, -1));
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assert(eq(4294967295.0, 4294967295LL));
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assert(eq(4294967295.5, 4294967295LL));
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assert(eq(4294967296.0, 4294967296LL));
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assert(eq(4294967296.5, 4294967296LL));
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assert(eq(14294967295.0, 14294967295LL));
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assert(eq(14294967295.5, 14294967295LL));
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assert(eq(14294967296.0, 14294967296LL));
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assert(eq(14294967296.5, 14294967296LL));
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assert(eq(-4294967295.0, -4294967295LL));
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assert(eq(-4294967295.5, -4294967295LL));
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assert(eq(-4294967296.0, -4294967296LL));
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assert(eq(-4294967296.5, -4294967296LL));
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assert(eq(-14294967295.0, -14294967295LL));
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assert(eq(-14294967295.5, -14294967295LL));
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assert(eq(-14294967296.0, -14294967296LL));
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assert(eq(-14294967296.5, -14294967296LL));
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assert(eq(4294967295.3, 4294967295LL));
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assert(eq(4294967296.3, 4294967296LL));
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assert(eq(14294967295.3, 14294967295LL));
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assert(eq(14294967296.3, 14294967296LL));
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assert(eq(-4294967295.3, -4294967295LL));
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assert(eq(-4294967296.3, -4294967296LL));
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assert(eq(-14294967295.3, -14294967295LL));
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assert(eq(-14294967296.3, -14294967296LL));
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assert(eq(4294967295.8, 4294967295LL));
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assert(eq(4294967296.8, 4294967296LL));
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assert(eq(14294967295.8, 14294967295LL));
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assert(eq(14294967296.8, 14294967296LL));
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assert(eq(-4294967295.8, -4294967295LL));
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assert(eq(-4294967296.8, -4294967296LL));
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assert(eq(-14294967295.8, -14294967295LL));
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assert(eq(-14294967296.8, -14294967296LL));
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// The following number is the largest double such that all integers smaller
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// than this can exactly be represented in a double.
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assert(eq(9007199254740992.0, 9007199254740992LL /* == 2^53 */));
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assert(eq(-9007199254740992.0, -9007199254740992LL /* == -2^53 */));
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printf("OK!\n");
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return 0;
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}
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