diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 1eb39df47da..0800359460b 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2007-07-08  Kaveh R. Ghazi  <ghazi@caip.rutgers.edu>
+
+	* gcc.dg/c99-math-double-1.c, gcc.dg/c99-math-float-1.c,
+	c99-math-long-double-1.c, c99-math.h: Test subnormals.
+
 2007-07-08  Manuel Lopez-Ibanez  <manu@gcc.gnu.org>
 
 	PR testsuite/25241
diff --git a/gcc/testsuite/gcc.dg/c99-math-double-1.c b/gcc/testsuite/gcc.dg/c99-math-double-1.c
index 54bdf60dfe7..ef11d1ba317 100644
--- a/gcc/testsuite/gcc.dg/c99-math-double-1.c
+++ b/gcc/testsuite/gcc.dg/c99-math-double-1.c
@@ -10,9 +10,10 @@ int main(void)
   double inf = INFINITY;
   double huge = HUGE_VAL;
   double norm = __DBL_MIN__;
+  double sub = __DBL_MIN__ / 2;
   double zero = 0.0;
 
-  C99_MATH_TESTS (nan, inf, huge, norm, zero)
+  C99_MATH_TESTS (nan, inf, huge, norm, sub, zero)
 
   return 0;
 }
diff --git a/gcc/testsuite/gcc.dg/c99-math-float-1.c b/gcc/testsuite/gcc.dg/c99-math-float-1.c
index ba27a710bde..f377c1af5b8 100644
--- a/gcc/testsuite/gcc.dg/c99-math-float-1.c
+++ b/gcc/testsuite/gcc.dg/c99-math-float-1.c
@@ -10,9 +10,10 @@ int main(void)
   float inf = INFINITY;
   float huge = HUGE_VALF;
   float norm = __FLT_MIN__;
+  float sub = __FLT_MIN__ / 2;
   float zero = 0.0f;
 
-  C99_MATH_TESTS (nan, inf, huge, norm, zero)
+  C99_MATH_TESTS (nan, inf, huge, norm, sub, zero)
 
   return 0;
 }
diff --git a/gcc/testsuite/gcc.dg/c99-math-long-double-1.c b/gcc/testsuite/gcc.dg/c99-math-long-double-1.c
index a8fa4d21fc1..5f1cd3097d3 100644
--- a/gcc/testsuite/gcc.dg/c99-math-long-double-1.c
+++ b/gcc/testsuite/gcc.dg/c99-math-long-double-1.c
@@ -10,9 +10,10 @@ int main(void)
   long double inf = INFINITY;
   long double huge = HUGE_VALL;
   long double norm = __LDBL_MIN__;
+  long double sub = __LDBL_MIN__ / 2;
   long double zero = 0.0l;
 
-  C99_MATH_TESTS (nan, inf, huge, norm, zero)
+  C99_MATH_TESTS (nan, inf, huge, norm, sub, zero)
 
   return 0;
 }
diff --git a/gcc/testsuite/gcc.dg/c99-math.h b/gcc/testsuite/gcc.dg/c99-math.h
index 2f3054ddd56..aff81b319ca 100644
--- a/gcc/testsuite/gcc.dg/c99-math.h
+++ b/gcc/testsuite/gcc.dg/c99-math.h
@@ -2,7 +2,7 @@
 
 extern void abort(void);
 
-#define C99_MATH_TESTS(nan, inf, huge, norm, zero)	\
+#define C99_MATH_TESTS(nan, inf, huge, norm, sub, zero)	\
 {							\
   if (fpclassify (nan) != FP_NAN)			\
     abort ();						\
@@ -16,6 +16,9 @@ extern void abort(void);
   if (fpclassify (norm) != FP_NORMAL)			\
     abort ();						\
 							\
+  if (fpclassify (sub) != FP_SUBNORMAL)			\
+    abort ();						\
+							\
   if (fpclassify (zero) != FP_ZERO)			\
     abort ();						\
 							\
@@ -32,6 +35,9 @@ extern void abort(void);
   if (isnan (norm))					\
     abort ();						\
 							\
+  if (isnan (sub))					\
+    abort ();						\
+							\
   if (isnan (zero))					\
     abort ();						\
 							\
@@ -48,6 +54,9 @@ extern void abort(void);
   if (isinf (norm))					\
     abort ();						\
 							\
+  if (isinf (sub))					\
+    abort ();						\
+							\
   if (isinf (zero))					\
     abort ();						\
 							\
@@ -64,6 +73,9 @@ extern void abort(void);
   if (!isfinite (norm))					\
     abort ();						\
 							\
+  if (!isfinite (sub))					\
+    abort ();						\
+							\
   if (!isfinite (zero))					\
     abort ();						\
 							\
@@ -80,6 +92,9 @@ extern void abort(void);
   if (!isnormal (norm))					\
     abort ();						\
 							\
+  if (isnormal (sub))					\
+    abort ();						\
+							\
   if (isnormal (zero))					\
     abort ();						\
 							\