From: "H.J. Lu" <hjl.tools@gmail.com>
To: libc-alpha@sourceware.org
Subject: [PATCH] Don't provide scalb/significand _FloatN aliases [BZ #31760]
Date: Mon, 20 May 2024 09:56:36 -0700 [thread overview]
Message-ID: <20240520165636.311074-1-hjl.tools@gmail.com> (raw)
scalb is a deprecated interface which was obsolescent in POSIX.1-2001,
removed in POSIX.1-2008, never made to C standard. significant was
originally from BSD and never made in any standard. Fix BZ #31760 by
not providing _FloatN aliases for them.
Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
math/s_significand_template.c | 12 ++++++++++++
math/w_scalb_template.c | 12 ++++++++++++
2 files changed, 24 insertions(+)
diff --git a/math/s_significand_template.c b/math/s_significand_template.c
index a351390411..0c8a1c3d75 100644
--- a/math/s_significand_template.c
+++ b/math/s_significand_template.c
@@ -30,4 +30,16 @@ M_DECL_FUNC (__significand) (FLOAT x)
{
return M_SUF (__ieee754_scalb) (x,(FLOAT) - M_SUF (__ilogb) (x));
}
+
+/* Don't provide _FloatN aliases for significand which was originally
+ from BSD and never made in any standard. */
+#undef libm_alias_float_other_r
+#define libm_alias_float_other_r(from, to, r)
+#undef libm_alias_double_other_r
+#define libm_alias_double_other_r(from, to, r)
+#undef libm_alias_ldouble_other_r
+#define libm_alias_ldouble_other_r(from, to, r)
+#undef libm_alias_float128_other_r
+#define libm_alias_float128_other_r(from, to, r)
+
declare_mgen_alias (__significand, significand)
diff --git a/math/w_scalb_template.c b/math/w_scalb_template.c
index 2fd5ca1878..f9f98508e9 100644
--- a/math/w_scalb_template.c
+++ b/math/w_scalb_template.c
@@ -52,6 +52,18 @@ FLOAT M_DECL_FUNC (__scalb) (FLOAT x, FLOAT fn)
return z;
}
+/* Don't provide _FloatN aliases for scalb which is a deprecated interface,
+ was obsolescent in POSIX.1-2001, removed in POSIX.1-2008, never made to
+ C standard. */
+#undef libm_alias_float_other_r
+#define libm_alias_float_other_r(from, to, r)
+#undef libm_alias_double_other_r
+#define libm_alias_double_other_r(from, to, r)
+#undef libm_alias_ldouble_other_r
+#define libm_alias_ldouble_other_r(from, to, r)
+#undef libm_alias_float128_other_r
+#define libm_alias_float128_other_r(from, to, r)
+
declare_mgen_alias (__scalb, scalb);
#endif /* __USE_WRAPPER_TEMPLATE. */
--
2.45.1
next reply other threads:[~2024-05-20 16:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-05-20 16:56 H.J. Lu [this message]
2024-05-22 12:38 ` Adhemerval Zanella Netto
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