Patchwork Support _Float32 in libm_alias_float [committed]

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Submitter Joseph Myers
Date Dec. 6, 2017, 10:15 p.m.
Message ID <alpine.DEB.2.20.1712062214370.19115@digraph.polyomino.org.uk>
Download mbox | patch
Permalink /patch/24766/
State New
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Comments

Joseph Myers - Dec. 6, 2017, 10:15 p.m.
This patch makes the libm_alias_float macro support creating _Float32
aliases, in preparation for enabling glibc support for that type.

Tested for x86_64; also tested with build-many-glibcs.py in
conjunction with other _Float32 changes.  Committed.

2017-12-06  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/generic/libm-alias-float.h: Include <bits/floatn.h>.
	[__HAVE_FLOAT32 && !__HAVE_DISTINCT_FLOAT32]
	(libm_alias_float_other_r): Create f32 alias.
	(libm_alias_float_r): Use semicolon before call to
	libm_alias_float_other_r.

Patch

diff --git a/sysdeps/generic/libm-alias-float.h b/sysdeps/generic/libm-alias-float.h
index 11bd472..b4a5f73 100644
--- a/sysdeps/generic/libm-alias-float.h
+++ b/sysdeps/generic/libm-alias-float.h
@@ -19,11 +19,18 @@ 
 #ifndef _LIBM_ALIAS_FLOAT_H
 #define _LIBM_ALIAS_FLOAT_H
 
+#include <bits/floatn.h>
+
 /* Define _FloatN / _FloatNx aliases for a float libm function that
    has internal name FROM ## f ## R and public names TO ## suffix ## R
    for each suffix of a supported _FloatN / _FloatNx floating-point
    type with the same format as float.  */
-#define libm_alias_float_other_r(from, to, r)
+#if __HAVE_FLOAT32 && !__HAVE_DISTINCT_FLOAT32
+# define libm_alias_float_other_r(from, to, r)	\
+  weak_alias (from ## f ## r, to ## f32 ## r)
+#else
+# define libm_alias_float_other_r(from, to, r)
+#endif
 
 /* Likewise, but without the R suffix.  */
 #define libm_alias_float_other(from, to)	\
@@ -37,7 +44,7 @@ 
    names (where there is one name per format, not per type) or for
    obsolescent functions not provided for _FloatN types.  */
 #define libm_alias_float_r(from, to, r)		\
-  weak_alias (from ## f ## r, to ## f ## r)	\
+  weak_alias (from ## f ## r, to ## f ## r);	\
   libm_alias_float_other_r (from, to, r)
 
 /* Likewise, but without the R suffix.  */