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-rw-r--r--math/test-math-scalar.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/math/test-math-scalar.h b/math/test-math-scalar.h
index 764db89f35..8df0d5ddc5 100644
--- a/math/test-math-scalar.h
+++ b/math/test-math-scalar.h
@@ -1,4 +1,4 @@
-/* Common definitions for libm tests for scalar functions.
+/* Common definitions for libm tests for scalar (non-narrowing) functions.
    Copyright (C) 1997-2018 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -18,3 +18,4 @@
 
 #define FUNC_TEST(function) FUNC (function)
 #define TEST_MATHVEC 0
+#define TEST_NARROW 0