[06/25] sparc: refactor sparc64 signbit{f} selector to C

Message ID 1509044813-9951-7-git-send-email-adhemerval.zanella@linaro.org
State New
Headers show
Series
  • Refactor IFUNC selection in C
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Commit Message

Adhemerval Zanella Oct. 26, 2017, 7:06 p.m.
This patch refactors the sparc64 ifunc selector to a C implementation.
Also, the generic symbol is moved to its own implementation file
(s_signbit-generic.S).

The patch simplifies the Makefile by moving the common objects from
libm-sysdeps_routines and sysdeps_routines to sysdeps_call rule and
including it where required with the correct prefix.

Checked on sparc64-linux-gnu and sparcv9-linux-gnu.

	* sysdeps/sparc/sparc-ifunc.h (sparc_libm_ifunc_redirected): New
	macro.
	* sysdeps/sparc/sparc64/fpu/multiarch/Makefile (sysdep_calls): New
	rule.
	(sysdep_routines): Use sysdep_calls as base.
	(libm-sysdep_routines): Add generic rule for symbols shared with
	libc.  Add s_signbit-generic and s_signbitf-generic objects.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c: New file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S: Likewise.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S: Remove file.
	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S: Likewise.

Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

---
 ChangeLog                                          | 14 ++++++++
 sysdeps/sparc/sparc-ifunc.h                        |  3 ++
 sysdeps/sparc/sparc64/fpu/multiarch/Makefile       | 20 +++++++-----
 .../sparc64/fpu/multiarch/s_signbit-generic.S      |  6 ++++
 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S    | 20 ------------
 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c    | 37 ++++++++++++++++++++++
 .../sparc64/fpu/multiarch/s_signbitf-generic.S     |  2 ++
 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S   | 10 ------
 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c   | 28 ++++++++++++++++
 9 files changed, 102 insertions(+), 38 deletions(-)
 create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S
 delete mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S
 create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c
 create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S
 delete mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S
 create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c

-- 
2.7.4

Comments

Adhemerval Zanella Nov. 29, 2017, 1:40 p.m. | #1
If no one opposes it, I will commit it shortly.

On 26/10/2017 17:06, Adhemerval Zanella wrote:
> This patch refactors the sparc64 ifunc selector to a C implementation.

> Also, the generic symbol is moved to its own implementation file

> (s_signbit-generic.S).

> 

> The patch simplifies the Makefile by moving the common objects from

> libm-sysdeps_routines and sysdeps_routines to sysdeps_call rule and

> including it where required with the correct prefix.

> 

> Checked on sparc64-linux-gnu and sparcv9-linux-gnu.

> 

> 	* sysdeps/sparc/sparc-ifunc.h (sparc_libm_ifunc_redirected): New

> 	macro.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/Makefile (sysdep_calls): New

> 	rule.

> 	(sysdep_routines): Use sysdep_calls as base.

> 	(libm-sysdep_routines): Add generic rule for symbols shared with

> 	libc.  Add s_signbit-generic and s_signbitf-generic objects.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c: New file.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c: Likewise.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S: Likewise.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S: Likewise.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S: Remove file.

> 	* sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S: Likewise.

> 

> Signed-off-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>

> ---

>  ChangeLog                                          | 14 ++++++++

>  sysdeps/sparc/sparc-ifunc.h                        |  3 ++

>  sysdeps/sparc/sparc64/fpu/multiarch/Makefile       | 20 +++++++-----

>  .../sparc64/fpu/multiarch/s_signbit-generic.S      |  6 ++++

>  sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S    | 20 ------------

>  sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c    | 37 ++++++++++++++++++++++

>  .../sparc64/fpu/multiarch/s_signbitf-generic.S     |  2 ++

>  sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S   | 10 ------

>  sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c   | 28 ++++++++++++++++

>  9 files changed, 102 insertions(+), 38 deletions(-)

>  create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S

>  delete mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S

>  create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c

>  create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S

>  delete mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S

>  create mode 100644 sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c

> 

> diff --git a/sysdeps/sparc/sparc-ifunc.h b/sysdeps/sparc/sparc-ifunc.h

> index 54420d8..4a68cf1 100644

> --- a/sysdeps/sparc/sparc-ifunc.h

> +++ b/sysdeps/sparc/sparc-ifunc.h

> @@ -158,6 +158,9 @@ END (__##name)

>  

>  # define sparc_libc_ifunc(name, expr) sparc_libm_ifunc (name, expr)

>  

> +# define sparc_libm_ifunc_redirected(redirected_name, name, expr)	\

> +  __ifunc (redirected_name, name, expr, int hwcap, libm_ifunc_init)

> +

>  /* It essentially does libc_hidden_builtin_def (name) and redirect

>     the internal redirected symbol to ifunc implementation.  */

>  # if defined SHARED

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/Makefile b/sysdeps/sparc/sparc64/fpu/multiarch/Makefile

> index 2ac4496..702452c 100644

> --- a/sysdeps/sparc/sparc64/fpu/multiarch/Makefile

> +++ b/sysdeps/sparc/sparc64/fpu/multiarch/Makefile

> @@ -1,17 +1,21 @@

>  ifeq ($(subdir),math)

> -libm-sysdep_routines += m_signbitf-vis3 m_signbit-vis3 m_finitef-vis3 \

> -			m_finite-vis3 m_isinff-vis3 m_isinf-vis3 \

> -			m_isnanf-vis3 m_isnan-vis3 s_lrintf-vis3 \

> -			s_lrint-vis3 s_rintf-vis3 s_rint-vis3 \

> +# These functions are built both for libc and libm because they're required

> +# by printf.  While the libc objects have the prefix s_, the libm ones are

> +# prefixed with  m_.

> +sysdep_calls := s_signbitf-vis3 s_signbit-vis3 s_signbitf-generic \

> +		s_signbit-generic s_finitef-vis3 \

> +		s_finite-vis3 s_isinff-vis3 s_isinf-vis3 \

> +		s_isnanf-vis3 s_isnan-vis3

> +

> +sysdep_routines += $(sysdep_calls)

> +libm-sysdep_routines += s_lrintf-vis3 s_lrint-vis3 s_rintf-vis3 s_rint-vis3 \

>  			s_fmaf-vis3 s_fma-vis3 s_fmaf-generic s_fma-generic \

>  			s_nearbyint-vis3 s_nearbyintf-vis3 \

>  			s_ceilf-vis3 s_ceil-vis3 s_ceilf-generic \

>  			s_ceil-generic s_floorf-vis3 s_floor-vis3 \

>  			s_floorf-generic s_floor-generic s_truncf-vis3 \

> -			s_trunc-vis3 s_truncf-generic s_trunc-generic

> -sysdep_routines += s_signbitf-vis3 s_signbit-vis3 s_finitef-vis3 \

> -		   s_finite-vis3 s_isinff-vis3 s_isinf-vis3 \

> -		   s_isnanf-vis3 s_isnan-vis3

> +			s_trunc-vis3 s_truncf-generic s_trunc-generic \

> +			$(sysdep_calls:s_%=m_%)

>  

>  CFLAGS-s_ceilf-vis3.c += -Wa,-Av9d -mvis3

>  CFLAGS-s_ceil-vis3.c += -Wa,-Av9d -mvis3

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S

> new file mode 100644

> index 0000000..dfa40ac

> --- /dev/null

> +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S

> @@ -0,0 +1,6 @@

> +#define __signbit __signbit_generic

> +#undef strong_alias

> +#define strong_alias(a, b)

> +#undef hidden_def

> +#define hidden_def(a)

> +#include <sysdeps/sparc/sparc64/fpu/s_signbit.S>

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S

> deleted file mode 100644

> index b8ff64a..0000000

> --- a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S

> +++ /dev/null

> @@ -1,20 +0,0 @@

> -#include <sparc-ifunc.h>

> -

> -SPARC_ASM_VIS3_IFUNC(signbit)

> -

> -/* On 64-bit the double version will also always work for

> -   long-double-precision since in both cases the word with the

> -   sign bit in it is passed always in register %f0.  */

> -strong_alias (__signbit, __signbitl)

> -hidden_def (__signbitl)

> -

> -# undef weak_alias

> -# define weak_alias(a, b)

> -# undef strong_alias

> -# define strong_alias(a, b)

> -# undef hidden_def

> -# define hidden_def(a)

> -

> -#define __signbit __signbit_generic

> -

> -#include "../s_signbit.S"

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c

> new file mode 100644

> index 0000000..33e69f8

> --- /dev/null

> +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c

> @@ -0,0 +1,37 @@

> +/* signbit ifunc resolver, Linux/sparc64 version. 

> +   Copyright (C) 2017 Free Software Foundation, Inc.

> +   This file is part of the GNU C Library.

> +

> +   The GNU C Library is free software; you can redistribute it and/or

> +   modify it under the terms of the GNU Lesser General Public

> +   License as published by the Free Software Foundation; either

> +   version 2.1 of the License, or (at your option) any later version.

> +

> +   The GNU C Library is distributed in the hope that it will be useful,

> +   but WITHOUT ANY WARRANTY; without even the implied warranty of

> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

> +   Lesser General Public License for more details.

> +

> +   You should have received a copy of the GNU Lesser General Public

> +   License along with the GNU C Library; if not, see

> +   <http://www.gnu.org/licenses/>.  */

> +

> +#define __signbit __redirect_signbit

> +#include <math.h>

> +#undef __signbit

> +

> +#include <sparc-ifunc.h>

> +

> +extern __typeof (__redirect_signbit) __signbit_vis3 attribute_hidden;

> +extern __typeof (__redirect_signbit) __signbit_generic attribute_hidden;

> +

> +sparc_libm_ifunc_redirected (__redirect_signbit, __signbit,

> +			     hwcap & HWCAP_SPARC_VIS3

> +			     ? __signbit_vis3

> +			     : __signbit_generic);

> +

> +/* On 64-bit the double version will also always work for

> +   long-double-precision since in both cases the word with the

> +   sign bit in it is passed always in register %f0.  */

> +strong_alias (__signbit, __signbitl)

> +sparc_ifunc_redirected_hidden_def (__redirect_signbit, __signbitl)

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S

> new file mode 100644

> index 0000000..851ff35

> --- /dev/null

> +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S

> @@ -0,0 +1,2 @@

> +#define __signbitf __signbitf_generic

> +#include <sysdeps/sparc/sparc64/fpu/s_signbitf.S>

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S

> deleted file mode 100644

> index d57e999..0000000

> --- a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S

> +++ /dev/null

> @@ -1,10 +0,0 @@

> -#include <sparc-ifunc.h>

> -

> -SPARC_ASM_VIS3_IFUNC(signbitf)

> -

> -# undef weak_alias

> -# define weak_alias(a, b)

> -

> -#define __signbitf __signbitf_generic

> -

> -#include "../s_signbitf.S"

> diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c

> new file mode 100644

> index 0000000..7e817f0

> --- /dev/null

> +++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c

> @@ -0,0 +1,28 @@

> +/* signbit ifunc resolver, Linux/sparc64 version. 

> +   Copyright (C) 2017 Free Software Foundation, Inc.

> +   This file is part of the GNU C Library.

> +

> +   The GNU C Library is free software; you can redistribute it and/or

> +   modify it under the terms of the GNU Lesser General Public

> +   License as published by the Free Software Foundation; either

> +   version 2.1 of the License, or (at your option) any later version.

> +

> +   The GNU C Library is distributed in the hope that it will be useful,

> +   but WITHOUT ANY WARRANTY; without even the implied warranty of

> +   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

> +   Lesser General Public License for more details.

> +

> +   You should have received a copy of the GNU Lesser General Public

> +   License along with the GNU C Library; if not, see

> +   <http://www.gnu.org/licenses/>.  */

> +

> +#include <math.h>

> +#include <sparc-ifunc.h>

> +

> +extern int __signbitf_vis3 (float) attribute_hidden;

> +extern int __signbitf_generic (float) attribute_hidden;

> +

> +sparc_libm_ifunc(__signbitf,

> +		 hwcap & HWCAP_SPARC_VIS3

> +		 ? __signbitf_vis3

> +		 : __signbitf_generic);

>

Patch

diff --git a/sysdeps/sparc/sparc-ifunc.h b/sysdeps/sparc/sparc-ifunc.h
index 54420d8..4a68cf1 100644
--- a/sysdeps/sparc/sparc-ifunc.h
+++ b/sysdeps/sparc/sparc-ifunc.h
@@ -158,6 +158,9 @@  END (__##name)
 
 # define sparc_libc_ifunc(name, expr) sparc_libm_ifunc (name, expr)
 
+# define sparc_libm_ifunc_redirected(redirected_name, name, expr)	\
+  __ifunc (redirected_name, name, expr, int hwcap, libm_ifunc_init)
+
 /* It essentially does libc_hidden_builtin_def (name) and redirect
    the internal redirected symbol to ifunc implementation.  */
 # if defined SHARED
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/Makefile b/sysdeps/sparc/sparc64/fpu/multiarch/Makefile
index 2ac4496..702452c 100644
--- a/sysdeps/sparc/sparc64/fpu/multiarch/Makefile
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/Makefile
@@ -1,17 +1,21 @@ 
 ifeq ($(subdir),math)
-libm-sysdep_routines += m_signbitf-vis3 m_signbit-vis3 m_finitef-vis3 \
-			m_finite-vis3 m_isinff-vis3 m_isinf-vis3 \
-			m_isnanf-vis3 m_isnan-vis3 s_lrintf-vis3 \
-			s_lrint-vis3 s_rintf-vis3 s_rint-vis3 \
+# These functions are built both for libc and libm because they're required
+# by printf.  While the libc objects have the prefix s_, the libm ones are
+# prefixed with  m_.
+sysdep_calls := s_signbitf-vis3 s_signbit-vis3 s_signbitf-generic \
+		s_signbit-generic s_finitef-vis3 \
+		s_finite-vis3 s_isinff-vis3 s_isinf-vis3 \
+		s_isnanf-vis3 s_isnan-vis3
+
+sysdep_routines += $(sysdep_calls)
+libm-sysdep_routines += s_lrintf-vis3 s_lrint-vis3 s_rintf-vis3 s_rint-vis3 \
 			s_fmaf-vis3 s_fma-vis3 s_fmaf-generic s_fma-generic \
 			s_nearbyint-vis3 s_nearbyintf-vis3 \
 			s_ceilf-vis3 s_ceil-vis3 s_ceilf-generic \
 			s_ceil-generic s_floorf-vis3 s_floor-vis3 \
 			s_floorf-generic s_floor-generic s_truncf-vis3 \
-			s_trunc-vis3 s_truncf-generic s_trunc-generic
-sysdep_routines += s_signbitf-vis3 s_signbit-vis3 s_finitef-vis3 \
-		   s_finite-vis3 s_isinff-vis3 s_isinf-vis3 \
-		   s_isnanf-vis3 s_isnan-vis3
+			s_trunc-vis3 s_truncf-generic s_trunc-generic \
+			$(sysdep_calls:s_%=m_%)
 
 CFLAGS-s_ceilf-vis3.c += -Wa,-Av9d -mvis3
 CFLAGS-s_ceil-vis3.c += -Wa,-Av9d -mvis3
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S
new file mode 100644
index 0000000..dfa40ac
--- /dev/null
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit-generic.S
@@ -0,0 +1,6 @@ 
+#define __signbit __signbit_generic
+#undef strong_alias
+#define strong_alias(a, b)
+#undef hidden_def
+#define hidden_def(a)
+#include <sysdeps/sparc/sparc64/fpu/s_signbit.S>
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S
deleted file mode 100644
index b8ff64a..0000000
--- a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.S
+++ /dev/null
@@ -1,20 +0,0 @@ 
-#include <sparc-ifunc.h>
-
-SPARC_ASM_VIS3_IFUNC(signbit)
-
-/* On 64-bit the double version will also always work for
-   long-double-precision since in both cases the word with the
-   sign bit in it is passed always in register %f0.  */
-strong_alias (__signbit, __signbitl)
-hidden_def (__signbitl)
-
-# undef weak_alias
-# define weak_alias(a, b)
-# undef strong_alias
-# define strong_alias(a, b)
-# undef hidden_def
-# define hidden_def(a)
-
-#define __signbit __signbit_generic
-
-#include "../s_signbit.S"
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c
new file mode 100644
index 0000000..33e69f8
--- /dev/null
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbit.c
@@ -0,0 +1,37 @@ 
+/* signbit ifunc resolver, Linux/sparc64 version. 
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#define __signbit __redirect_signbit
+#include <math.h>
+#undef __signbit
+
+#include <sparc-ifunc.h>
+
+extern __typeof (__redirect_signbit) __signbit_vis3 attribute_hidden;
+extern __typeof (__redirect_signbit) __signbit_generic attribute_hidden;
+
+sparc_libm_ifunc_redirected (__redirect_signbit, __signbit,
+			     hwcap & HWCAP_SPARC_VIS3
+			     ? __signbit_vis3
+			     : __signbit_generic);
+
+/* On 64-bit the double version will also always work for
+   long-double-precision since in both cases the word with the
+   sign bit in it is passed always in register %f0.  */
+strong_alias (__signbit, __signbitl)
+sparc_ifunc_redirected_hidden_def (__redirect_signbit, __signbitl)
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S
new file mode 100644
index 0000000..851ff35
--- /dev/null
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf-generic.S
@@ -0,0 +1,2 @@ 
+#define __signbitf __signbitf_generic
+#include <sysdeps/sparc/sparc64/fpu/s_signbitf.S>
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S
deleted file mode 100644
index d57e999..0000000
--- a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.S
+++ /dev/null
@@ -1,10 +0,0 @@ 
-#include <sparc-ifunc.h>
-
-SPARC_ASM_VIS3_IFUNC(signbitf)
-
-# undef weak_alias
-# define weak_alias(a, b)
-
-#define __signbitf __signbitf_generic
-
-#include "../s_signbitf.S"
diff --git a/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c
new file mode 100644
index 0000000..7e817f0
--- /dev/null
+++ b/sysdeps/sparc/sparc64/fpu/multiarch/s_signbitf.c
@@ -0,0 +1,28 @@ 
+/* signbit ifunc resolver, Linux/sparc64 version. 
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <math.h>
+#include <sparc-ifunc.h>
+
+extern int __signbitf_vis3 (float) attribute_hidden;
+extern int __signbitf_generic (float) attribute_hidden;
+
+sparc_libm_ifunc(__signbitf,
+		 hwcap & HWCAP_SPARC_VIS3
+		 ? __signbitf_vis3
+		 : __signbitf_generic);