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-rw-r--r--ChangeLog6
-rw-r--r--math/tgmath.h9
2 files changed, 14 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog
index e590178a40..bfd6957368 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-10-24 Joseph Myers <joseph@codesourcery.com>
+ Ulrich Drepper <drepper@redhat.com>
+
+ * math/tgmath.h (__floating_type): Use __builtin_classify_type in
+ definition for GCC 3.1 and later.
+
2008-10-31 Jakub Jelinek <jakub@redhat.com>
* elf/dl-tls.c (__tls_get_addr): After calling _dl_update_slotinfo
diff --git a/math/tgmath.h b/math/tgmath.h
index 4f45aaa0f2..eefdd26c9c 100644
--- a/math/tgmath.h
+++ b/math/tgmath.h
@@ -48,7 +48,14 @@
/* 1 if 'type' is a floating type, 0 if 'type' is an integer type.
Allows for _Bool. Expands to an integer constant expression. */
-# define __floating_type(type) (((type) 0.25) && ((type) 0.25 - 1))
+# if __GNUC_PREREQ (3, 1)
+# define __floating_type(type) \
+ (__builtin_classify_type ((type) 0) == 8 \
+ || (__builtin_classify_type ((type) 0) == 9 \
+ && __builtin_classify_type (__real__ ((type) 0)) == 8))
+# else
+# define __floating_type(type) (((type) 0.25) && ((type) 0.25 - 1))
+# endif
/* The tgmath real type for T, where E is 0 if T is an integer type and
1 for a floating type. */