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-rw-r--r--gcc-4.9/gcc/testsuite/gcc.target/arm/fp16-rounding-alt-1.c47
1 files changed, 47 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.target/arm/fp16-rounding-alt-1.c b/gcc-4.9/gcc/testsuite/gcc.target/arm/fp16-rounding-alt-1.c
new file mode 100644
index 000000000..f50b4475f
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.target/arm/fp16-rounding-alt-1.c
@@ -0,0 +1,47 @@
+/* Test intermediate rounding of double to float and then to __fp16, using
+ an example of a number that would round differently if it went directly
+ from double to __fp16. */
+
+/* { dg-do run } */
+/* { dg-options "-mfp16-format=alternative" } */
+
+#include <stdlib.h>
+
+/* The original double value. */
+#define ORIG 0x1.0020008p0
+
+/* The expected (double)((__fp16)((float)ORIG)) value. */
+#define ROUNDED 0x1.0000000p0
+
+typedef union u {
+ __fp16 f;
+ unsigned short h;
+} ufh;
+
+ufh s = { ORIG };
+ufh r = { ROUNDED };
+
+double d = ORIG;
+
+int
+main (void)
+{
+ ufh x;
+
+ /* Test that the rounding is correct for static initializers. */
+ if (s.h != r.h)
+ abort ();
+
+ /* Test that the rounding is correct for a casted constant expression
+ not in a static initializer. */
+ x.f = (__fp16)ORIG;
+ if (x.h != r.h)
+ abort ();
+
+ /* Test that the rounding is correct for a runtime conversion. */
+ x.f = (__fp16)d;
+ if (x.h != r.h)
+ abort ();
+
+ return 0;
+}