1 files changed, 122 insertions, 0 deletions
diff --git a/config/cmake/ConversionTests.c b/config/cmake/ConversionTests.c
index 725f049..8e103bd 100644
--- a/config/cmake/ConversionTests.c
+++ b/config/cmake/ConversionTests.c
@@ -285,3 +285,125 @@ int HDF_NO_UBSAN main(void)
 }
 
 #endif
+
+#ifdef H5_FLOAT16_CONVERSION_FUNCS_LINK_TEST
+
+#define __STDC_WANT_IEC_60559_TYPES_EXT__
+
+#include <stdlib.h>
+#include <float.h>
+
+int HDF_NO_UBSAN main(void)
+{
+    _Float16           fl16_var;
+    signed char        sc;
+    unsigned char      usc;
+    short              s;
+    unsigned short     us;
+    int                i;
+    unsigned int       ui;
+    long               l;
+    unsigned long      ul;
+    long long          ll;
+    unsigned long long ull;
+    float              f;
+    double             d;
+    long double        ld;
+    int                ret = 0;
+
+    /*
+     * Cast the _Float16 type between all the different C datatypes
+     * we support conversions for in H5Tconv.c to check if the compiler
+     * properly links any software conversion functions it may generate
+     * for the casts, such as __extendhfsf2 or __truncdfhf2.
+     */
+
+    fl16_var = 3.0f16;
+
+    sc  = (signed char)fl16_var;
+    usc = (unsigned char)fl16_var;
+    s   = (short)fl16_var;
+    us  = (unsigned short)fl16_var;
+    i   = (int)fl16_var;
+    ui  = (unsigned int)fl16_var;
+    l   = (long)fl16_var;
+    ul  = (unsigned long)fl16_var;
+    ll  = (long long)fl16_var;
+    ull = (unsigned long long)fl16_var;
+    f   = (float)fl16_var;
+    d   = (double)fl16_var;
+    ld  = (long double)fl16_var;
+
+    sc       = (signed char)3;
+    fl16_var = (_Float16)sc;
+
+    usc      = (unsigned char)3;
+    fl16_var = (_Float16)usc;
+
+    s        = (short)3;
+    fl16_var = (_Float16)s;
+
+    us       = (unsigned short)3;
+    fl16_var = (_Float16)us;
+
+    i        = (int)3;
+    fl16_var = (_Float16)i;
+
+    ui       = (unsigned int)3;
+    fl16_var = (_Float16)ui;
+
+    l        = (long)3;
+    fl16_var = (_Float16)l;
+
+    ul       = (unsigned long)3;
+    fl16_var = (_Float16)ul;
+
+    ll       = (long long)3;
+    fl16_var = (_Float16)ll;
+
+    ull      = (unsigned long long)3;
+    fl16_var = (_Float16)ull;
+
+    f        = (float)3.0f;
+    fl16_var = (_Float16)f;
+
+    d        = (double)3.0;
+    fl16_var = (_Float16)d;
+
+    ld       = (long double)3.0l;
+    fl16_var = (_Float16)ld;
+
+done:
+    exit(ret);
+}
+
+#endif
+
+#ifdef H5_LDOUBLE_TO_FLOAT16_CORRECT_TEST
+
+#define __STDC_WANT_IEC_60559_TYPES_EXT__
+
+#include <stdlib.h>
+#include <float.h>
+#include <math.h>
+#include <limits.h>
+
+int HDF_NO_UBSAN main(void)
+{
+    long double ld;
+    _Float16    half;
+    int         ret = 1;
+
+    ld   = 32.0L;
+    half = 64.0f16;
+
+    half = (_Float16)ld;
+
+    if (fabsl(ld - (long double)half) < LDBL_EPSILON)
+        ret = 0;
+
+done:
+    exit(ret);
+}
+
+#endif