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-rw-r--r--math/bits/mathcalls.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/math/bits/mathcalls.h b/math/bits/mathcalls.h
index c5853a325f..2fd1d289da 100644
--- a/math/bits/mathcalls.h
+++ b/math/bits/mathcalls.h
@@ -395,6 +395,9 @@ __MATHDECL_1 (int, totalorder,, (_Mdouble_ __x, _Mdouble_ __y))
__MATHDECL_1 (int, totalordermag,, (_Mdouble_ __x, _Mdouble_ __y))
__attribute__ ((__const__));
+/* Canonicalize floating-point representation. */
+__MATHDECL_1 (int, canonicalize,, (_Mdouble_ *__cx, const _Mdouble_ *__x));
+
/* Get NaN payload. */
__MATHCALL (getpayload,, (const _Mdouble_ *__x));
#endif