[Patch ARM/ AArch64] Fix typo in vcvt_f16.c testcase .

[Ramana Radhakrishnan]

Hi,

This test worked by accident. While looking at why this was failing randomly in 
my builds for arm-none-eabi, I discovered a bug in the way in which the 
testcases were written up in this case. Tested on arm-none-eabi cross fixing 
the issues that I was seeing with this test. 

Applied to trunk as obvious.

regards
Ramana


        * gcc.target/aarc64/advsimd-intrinsics/vcvt_f16.c (TEST_MSG): Fix typo.
        (exec_vcvt): Add comments.

diff --git a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vcvt_f16.c 
b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vcvt_f16.c
index 48e50e1..c3e4d4f 100644
--- a/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vcvt_f16.c
+++ b/gcc/testsuite/gcc.target/aarch64/advsimd-intrinsics/vcvt_f16.c
@@ -21,7 +21,7 @@ exec_vcvt (void)
 {
   clean_results ();
 
-#define TEST_MSG vcvt_f32_f16
+#define TEST_MSG "vcvt_f32_f16"
   {
     VECT_VAR_DECL (buffer_src, float, 16, 4) [] = { 16.0, 15.0, 14.0, 13.0 };
 
@@ -39,7 +39,7 @@ exec_vcvt (void)
 
   clean_results ();
 
-#define TEST_MSG vcvt_f16_f32
+#define TEST_MSG "vcvt_f16_f32"
   {
     VECT_VAR_DECL (buffer_src, float, 32, 4) [] = { 1.5, 2.5, 3.5, 4.5 };
     DECL_VARIABLE (vector_src, float, 32, 4);
@@ -54,6 +54,8 @@ exec_vcvt (void)
   }
 #undef TEST_MSG
 
+  /* We run more tests for AArch64 as the relevant intrinsics
+     do not exist on AArch32.  */
 #if defined (__aarch64__)
   clean_results ();