math: Additional type conversion tests

[Thomas Schwinge]

Hi!

The following test addition has 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, I'm proposing them anyway, as it's just an
enhancement of tests already present.  Tested for several MIPS multilibs,
x86, x86_64, PowerPC -m64.

	* 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.

diff --git math/basic-test.c math/basic-test.c
index 9e9b848..44145a7 100644
--- math/basic-test.c
+++ 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)								      \
 {									      \
@@ -189,11 +189,14 @@ 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
@@ -201,12 +204,15 @@ 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;


Grüße,
 Thomas
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