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authorJiyoung Yun <jy910.yun@samsung.com>2016-12-27 07:46:08 (GMT)
committerJiyoung Yun <jy910.yun@samsung.com>2016-12-27 07:46:08 (GMT)
commitdb20f3f1bb8595633a7e16c8900fd401a453a6b5 (patch)
treee5435159cd1bf0519276363a6fe1663d1721bed3 /src/pal/tests/palsuite/c_runtime/_isnanf/test1/test1.c
parent4b4aad7217d3292650e77eec2cf4c198ea9c3b4b (diff)
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Imported Upstream version 1.0.0.9127upstream/1.0.0.9127
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+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*============================================================================
+**
+** Source: test1.c
+**
+** Purpose:
+** Test _isnanf with a number of trivial values, to ensure they indicated that
+** they are numbers. Then try with Positive/Negative Infinite, which should
+** also be numbers. Finally set the least and most significant bits of
+** the fraction to positive and negative, at which point it should return
+** the true value.
+**
+**==========================================================================*/
+
+#include <palsuite.h>
+
+#define TO_FLOAT(x) (*((float*)((void*)&x)))
+#define TO_I32(x) (*((INT32*)((void*)&x)))
+
+/*
+ * NaN: any float with maximum exponent (0x7f8) and non-zero fraction
+ */
+int __cdecl main(int argc, char *argv[])
+{
+ /*
+ * Initialize the PAL and return FAIL if this fails
+ */
+ if (PAL_Initialize(argc, argv) != 0)
+ {
+ return FAIL;
+ }
+
+ /*
+ * Try some trivial values
+ */
+ if (_isnanf(0.0f))
+ {
+ Fail("_isnanf() incorrectly identified %f as NaN!\n", 0.0f);
+ }
+
+ if (_isnanf(1.234567f))
+ {
+ Fail("_isnanf() incorrectly identified %f as NaN!\n", 1.234567f);
+ }
+
+ if (_isnanf(42.0f))
+ {
+ Fail("_isnanf() incorrectly identified %f as NaN!\n", 42.0f);
+ }
+
+ UINT32 lneginf = 0xff800000u;
+ UINT32 lposinf = 0x7f800000u;
+
+ float neginf = TO_FLOAT(lneginf);
+ float posinf = TO_FLOAT(lposinf);
+
+ /*
+ * Try positive and negative infinity
+ */
+ if (_isnanf(neginf))
+ {
+ Fail("_isnanf() incorrectly identified negative infinity as NaN!\n");
+ }
+
+ if (_isnanf(posinf))
+ {
+ Fail("_isnanf() incorrectly identified infinity as NaN!\n");
+ }
+
+ /*
+ * Try setting the least significant bit of the fraction,
+ * positive and negative
+ */
+ UINT32 lsnan = 0xff800001u;
+ float snan = TO_FLOAT(lsnan);
+
+ if (!_isnanf(snan))
+ {
+ Fail("_isnanf() failed to identify %I32x as NaN!\n", lsnan);
+ }
+
+ UINT32 lqnan = 0x7f800001u;
+ float qnan = TO_FLOAT(lqnan);
+
+ if (!_isnanf(qnan))
+ {
+ Fail("_isnanf() failed to identify %I32x as NaN!\n", lqnan);
+ }
+
+ /*
+ * Try setting the most significant bit of the fraction,
+ * positive and negative
+ */
+ lsnan = 0xffc00000u;
+ snan = TO_FLOAT(lsnan);
+
+ if (!_isnanf(snan))
+ {
+ Fail ("_isnanf() failed to identify %I32x as NaN!\n", lsnan);
+ }
+
+ lqnan = 0x7fc00000u;
+ qnan = TO_FLOAT(lqnan);
+
+ if (!_isnanf(qnan))
+ {
+ Fail ("_isnanf() failed to identify %I32x as NaN!\n", lqnan);
+ }
+
+ PAL_Terminate();
+ return PASS;
+}