math: Additional type conversion tests

These have helped me find and fix type conversion issues in QEMU's MIPS
hardware emulation.  While certainly glibc is not the best place for such
tests, they're just an enhancement of tests already present.

ChangeLog

@@ -1,3 +1,14 @@
+2013-08-29  Thomas Schwinge  <thomas@codesourcery.com>
+
+	* math/basic-test.c (TEST_CONVERT): New macro, renamed from
+	TEST_TRUNC.
+	(convert_dfsf_test, convert_tfsf_test, convert_tfdf_test): New
+	functions, renamed from truncdfsf_test, trunctfsf_test,
+	trunctfdf_test.
+	(convert_sfdf_test, convert_sftf_test, convert_dftf_test): New
+	functions.
+	(do_test): Run all these.
+
 2013-08-29   Ondřej Bílka  <neleai@seznam.cz>
 
 	* argp/argp-help.c: Fix typos.

math/basic-test.c

@@ -148,7 +148,7 @@ NAME (void)								      \
   check (#FLOAT " isinf (-HUGE_VALx) == -1", isinf (x1) == -1);		      \
 }
 
-#define TEST_TRUNC(NAME, FLOAT, DOUBLE, SUFFIX)				      \
+#define TEST_CONVERT(NAME, FLOAT, DOUBLE, SUFFIX)			      \
 void									      \
 NAME (void)								      \
 {									      \
@@ -189,24 +189,30 @@ NAME (void)								      \
 
 TEST_FUNC (float_test, float, f, FLT_EPSILON, HUGE_VALF)
 TEST_FUNC (double_test, double, , DBL_EPSILON, HUGE_VAL)
-TEST_TRUNC (truncdfsf_test, float, double, )
+TEST_CONVERT (convert_dfsf_test, float, double, )
+TEST_CONVERT (convert_sfdf_test, double, float, f)
 #ifndef NO_LONG_DOUBLE
 TEST_FUNC (ldouble_test, long double, l, LDBL_EPSILON, HUGE_VALL)
-TEST_TRUNC (trunctfsf_test, float, long double, l)
-TEST_TRUNC (trunctfdf_test, double, long double, l)
+TEST_CONVERT (convert_tfsf_test, float, long double, l)
+TEST_CONVERT (convert_sftf_test, long double, float, f)
+TEST_CONVERT (convert_tfdf_test, double, long double, l)
+TEST_CONVERT (convert_dftf_test, long double, double, )
 #endif
 
 int
 do_test (void)
 {
   float_test ();
   double_test ();
-  truncdfsf_test();
+  convert_dfsf_test();
+  convert_sfdf_test();
 
 #ifndef NO_LONG_DOUBLE
   ldouble_test ();
-  trunctfsf_test();
-  trunctfdf_test();
+  convert_tfsf_test();
+  convert_sftf_test();
+  convert_tfdf_test();
+  convert_dftf_test();
 #endif
 
   return errors != 0;