[v2] powerpc: Add log IFUNC multiarch support for POWER10
Commit Message
Changes since v1:
- Checks for the -mcpu=power10 support on configure instead of
checking GCC's version.
- Don't build __log_power10 without -mcpu=power10.
---8<---
Checked on ppc64le built without --with-cpu, with --with-cpu=power9
and with --disable-multi-arch.
---
config.h.in | 3 ++
.../powerpc64/le/fpu/multiarch/Makefile | 8 ++++
.../powerpc64/le/fpu/multiarch/configure | 33 +++++++++++++++++
.../powerpc64/le/fpu/multiarch/configure.ac | 14 +++++++
.../le/fpu/multiarch/e_log-power10.c | 4 ++
.../powerpc64/le/fpu/multiarch/e_log-ppc64.c | 4 ++
.../powerpc64/le/fpu/multiarch/e_log.c | 37 +++++++++++++++++++
.../powerpc64/le/fpu/multiarch/w_log.c | 1 +
8 files changed, 104 insertions(+)
create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
Comments
Raphael Moreira Zinsly via Libc-alpha <libc-alpha@sourceware.org> writes:
> Changes since v1:
> - Checks for the -mcpu=power10 support on configure instead of
> checking GCC's version.
> - Don't build __log_power10 without -mcpu=power10.
>
> ---8<---
>
> Checked on ppc64le built without --with-cpu, with --with-cpu=power9
> and with --disable-multi-arch.
> ---
> config.h.in | 3 ++
> .../powerpc64/le/fpu/multiarch/Makefile | 8 ++++
> .../powerpc64/le/fpu/multiarch/configure | 33 +++++++++++++++++
> .../powerpc64/le/fpu/multiarch/configure.ac | 14 +++++++
> .../le/fpu/multiarch/e_log-power10.c | 4 ++
> .../powerpc64/le/fpu/multiarch/e_log-ppc64.c | 4 ++
> .../powerpc64/le/fpu/multiarch/e_log.c | 37 +++++++++++++++++++
> .../powerpc64/le/fpu/multiarch/w_log.c | 1 +
> 8 files changed, 104 insertions(+)
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
>
> diff --git a/config.h.in b/config.h.in
> index ca1547ae67..14c3bf0f0d 100644
> --- a/config.h.in
> +++ b/config.h.in
> @@ -23,6 +23,9 @@
> /* On powerpc64, use @notoc. */
> #undef USE_PPC64_NOTOC
>
> +/* On powerpc64, define if the compiler supports -mcpu=power10. */
> +#undef USE_PPC64_MCPU_POWER10
> +
> /* Define if _Unwind_Find_FDE should be exported from glibc. */
> #undef EXPORT_UNWIND_FIND_FDE
>
Ok.
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
> index 22252d9e0a..cc073b53d3 100644
> --- a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
> @@ -208,4 +208,12 @@ object-suffixes-left := $(all-object-suffixes)
> include $(o-iterator)
>
> endif # do_f128_multiarch
> +
> +libm-sysdep_routines += e_log-ppc64
> +
> +ifeq ($(mcpu-power10), yes)
> +libm-sysdep_routines += e_log-power10
> +CFLAGS-e_log-power10.c += -mcpu=power10
> +endif
> +
> endif
Ok. Compiling __log_ppc64 with default flags and __log_power10 with
-mcpu=power10 based on flag defined in
sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> new file mode 100644
> index 0000000000..4ca1d15833
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> @@ -0,0 +1,33 @@
> +# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
> +
> +OLD_CFLAGS="$CFLAGS"
> +CFLAGS="$CFLAGS -mcpu=power10"
> +
> +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the compiler supports -mcpu=power10" >&5
> +$as_echo_n "checking if the compiler supports -mcpu=power10... " >&6; }
> +if ${libc_cv_mcpu_power10+:} false; then :
> + $as_echo_n "(cached) " >&6
> +else
> +
> +cat confdefs.h - <<_ACEOF >conftest.$ac_ext
> +/* end confdefs.h. */
> +
> +
> +_ACEOF
> +if ac_fn_c_try_compile "$LINENO"; then :
> + libc_cv_mcpu_power10=yes
> +else
> + libc_cv_mcpu_power10=no
> +fi
> +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
> +fi
> +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_mcpu_power10" >&5
> +$as_echo "$libc_cv_mcpu_power10" >&6; }
> +config_vars="$config_vars
> +mcpu-power10 = $libc_cv_mcpu_power10"
> +if test "$libc_cv_mcpu_power10" == "yes"; then :
> +
> + $as_echo "#define USE_PPC64_MCPU_POWER10 1" >>confdefs.h
> +
> +fi
> +CFLAGS="$OLD_CFLAGS"
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
> new file mode 100644
> index 0000000000..ceb578cc59
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
> @@ -0,0 +1,14 @@
> +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
> +
> +OLD_CFLAGS="$CFLAGS"
> +CFLAGS="$CFLAGS -mcpu=power10"
> +AC_CACHE_CHECK([if the compiler supports -mcpu=power10],
> + libc_cv_mcpu_power10, [
> +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
> +]])],
> + [libc_cv_mcpu_power10=yes],
> + [libc_cv_mcpu_power10=no])])
> +LIBC_CONFIG_VAR([mcpu-power10], [$libc_cv_mcpu_power10])
> +AS_IF([[test "$libc_cv_mcpu_power10" == "yes"]],[
> + AC_DEFINE(USE_PPC64_MCPU_POWER10)])
> +CFLAGS="$OLD_CFLAGS"
Ok.
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
> new file mode 100644
> index 0000000000..4226e07643
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
> @@ -0,0 +1,4 @@
> +#include <math.h>
> +
> +#define __log __log_power10
> +#include <sysdeps/ieee754/dbl-64/e_log.c>
Ok.
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
> new file mode 100644
> index 0000000000..cb902d727a
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
> @@ -0,0 +1,4 @@
> +#include <math.h>
> +#define __log __log_ppc64
> +
Ok.
> +#include <sysdeps/ieee754/dbl-64/e_log.c>
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
> new file mode 100644
> index 0000000000..b7961096a5
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
> @@ -0,0 +1,37 @@
> +/* Multiple versions of IEEE 754 log.
> + Copyright (C) 2021 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
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <math.h>
> +#include "init-arch.h"
> +#include <libm-alias-finite.h>
> +
> +extern double __redirect_ieee754_log (double);
> +
> +extern __typeof (log) __log_ppc64 attribute_hidden;
> +#ifdef USE_PPC64_MCPU_POWER10
> +extern __typeof (log) __log_power10 attribute_hidden;
> +#endif
> +
> +libc_ifunc_redirected (__redirect_ieee754_log, __ieee754_log,
> +#ifdef USE_PPC64_MCPU_POWER10
> + (hwcap2 & PPC_FEATURE2_ARCH_3_1)
> + ? __log_power10 :
> +#endif
> + __log_ppc64);
> +
> +libm_alias_finite (__ieee754_log, __log)
Ok. In case -mcpu=power10 is not supported, __log_ppc64 will be used.
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
> new file mode 100644
> index 0000000000..9b2b018711
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
> @@ -0,0 +1 @@
> +#include <sysdeps/../math/w_log.c>
Also tested with and without multiarch and --with-cpu=power[9,10].
LGTM.
Reviewed-by: Matheus Castanho <msc@linux.ibm.com>
--
Matheus Castanho
LGTM. All tests with -mcpu=power10.
Quoting Raphael Moreira Zinsly via Libc-alpha (2021-04-08 15:15:11)
> Changes since v1:
> - Checks for the -mcpu=power10 support on configure instead of
> checking GCC's version.
> - Don't build __log_power10 without -mcpu=power10.
>
> ---8<---
>
> Checked on ppc64le built without --with-cpu, with --with-cpu=power9
> and with --disable-multi-arch.
> ---
> config.h.in | 3 ++
> .../powerpc64/le/fpu/multiarch/Makefile | 8 ++++
> .../powerpc64/le/fpu/multiarch/configure | 33 +++++++++++++++++
> .../powerpc64/le/fpu/multiarch/configure.ac | 14 +++++++
> .../le/fpu/multiarch/e_log-power10.c | 4 ++
> .../powerpc64/le/fpu/multiarch/e_log-ppc64.c | 4 ++
> .../powerpc64/le/fpu/multiarch/e_log.c | 37 +++++++++++++++++++
> .../powerpc64/le/fpu/multiarch/w_log.c | 1 +
> 8 files changed, 104 insertions(+)
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
> create mode 100644 sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
>
> diff --git a/config.h.in b/config.h.in
> index ca1547ae67..14c3bf0f0d 100644
> --- a/config.h.in
> +++ b/config.h.in
> @@ -23,6 +23,9 @@
> /* On powerpc64, use @notoc. */
> #undef USE_PPC64_NOTOC
>
> +/* On powerpc64, define if the compiler supports -mcpu=power10. */
> +#undef USE_PPC64_MCPU_POWER10
> +
> /* Define if _Unwind_Find_FDE should be exported from glibc. */
> #undef EXPORT_UNWIND_FIND_FDE
>
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
> index 22252d9e0a..cc073b53d3 100644
> --- a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/Makefile
> @@ -208,4 +208,12 @@ object-suffixes-left := $(all-object-suffixes)
> include $(o-iterator)
>
> endif # do_f128_multiarch
> +
> +libm-sysdep_routines += e_log-ppc64
> +
> +ifeq ($(mcpu-power10), yes)
> +libm-sysdep_routines += e_log-power10
> +CFLAGS-e_log-power10.c += -mcpu=power10
> +endif
> +
> endif
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> new file mode 100644
> index 0000000000..4ca1d15833
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure
> @@ -0,0 +1,33 @@
> +# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
> +
> +OLD_CFLAGS="$CFLAGS"
> +CFLAGS="$CFLAGS -mcpu=power10"
> +
> +{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the compiler supports -mcpu=power10" >&5
> +$as_echo_n "checking if the compiler supports -mcpu=power10... " >&6; }
> +if ${libc_cv_mcpu_power10+:} false; then :
> + $as_echo_n "(cached) " >&6
> +else
> +
> +cat confdefs.h - <<_ACEOF >conftest.$ac_ext
> +/* end confdefs.h. */
> +
> +
> +_ACEOF
> +if ac_fn_c_try_compile "$LINENO"; then :
> + libc_cv_mcpu_power10=yes
> +else
> + libc_cv_mcpu_power10=no
> +fi
> +rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
> +fi
> +{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_mcpu_power10" >&5
> +$as_echo "$libc_cv_mcpu_power10" >&6; }
> +config_vars="$config_vars
> +mcpu-power10 = $libc_cv_mcpu_power10"
> +if test "$libc_cv_mcpu_power10" == "yes"; then :
> +
> + $as_echo "#define USE_PPC64_MCPU_POWER10 1" >>confdefs.h
> +
> +fi
> +CFLAGS="$OLD_CFLAGS"
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
> new file mode 100644
> index 0000000000..ceb578cc59
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/configure.ac
> @@ -0,0 +1,14 @@
> +GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
> +
> +OLD_CFLAGS="$CFLAGS"
> +CFLAGS="$CFLAGS -mcpu=power10"
> +AC_CACHE_CHECK([if the compiler supports -mcpu=power10],
> + libc_cv_mcpu_power10, [
> +AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
> +]])],
> + [libc_cv_mcpu_power10=yes],
> + [libc_cv_mcpu_power10=no])])
> +LIBC_CONFIG_VAR([mcpu-power10], [$libc_cv_mcpu_power10])
> +AS_IF([[test "$libc_cv_mcpu_power10" == "yes"]],[
> + AC_DEFINE(USE_PPC64_MCPU_POWER10)])
> +CFLAGS="$OLD_CFLAGS"
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
> new file mode 100644
> index 0000000000..4226e07643
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-power10.c
> @@ -0,0 +1,4 @@
> +#include <math.h>
> +
> +#define __log __log_power10
> +#include <sysdeps/ieee754/dbl-64/e_log.c>
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
> new file mode 100644
> index 0000000000..cb902d727a
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log-ppc64.c
> @@ -0,0 +1,4 @@
> +#include <math.h>
> +#define __log __log_ppc64
> +
> +#include <sysdeps/ieee754/dbl-64/e_log.c>
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
> new file mode 100644
> index 0000000000..b7961096a5
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/e_log.c
> @@ -0,0 +1,37 @@
> +/* Multiple versions of IEEE 754 log.
> + Copyright (C) 2021 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
> + <https://www.gnu.org/licenses/>. */
> +
> +#include <math.h>
> +#include "init-arch.h"
> +#include <libm-alias-finite.h>
> +
> +extern double __redirect_ieee754_log (double);
> +
> +extern __typeof (log) __log_ppc64 attribute_hidden;
> +#ifdef USE_PPC64_MCPU_POWER10
> +extern __typeof (log) __log_power10 attribute_hidden;
> +#endif
> +
> +libc_ifunc_redirected (__redirect_ieee754_log, __ieee754_log,
> +#ifdef USE_PPC64_MCPU_POWER10
> + (hwcap2 & PPC_FEATURE2_ARCH_3_1)
> + ? __log_power10 :
> +#endif
> + __log_ppc64);
> +
> +libm_alias_finite (__ieee754_log, __log)
> diff --git a/sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
> new file mode 100644
> index 0000000000..9b2b018711
> --- /dev/null
> +++ b/sysdeps/powerpc/powerpc64/le/fpu/multiarch/w_log.c
> @@ -0,0 +1 @@
> +#include <sysdeps/../math/w_log.c>
> --
> 2.29.2
>
I pushed as 25cb72820ac40e73acf130edf97c895cf9b0b43a thanks!
@@ -23,6 +23,9 @@
/* On powerpc64, use @notoc. */
#undef USE_PPC64_NOTOC
+/* On powerpc64, define if the compiler supports -mcpu=power10. */
+#undef USE_PPC64_MCPU_POWER10
+
/* Define if _Unwind_Find_FDE should be exported from glibc. */
#undef EXPORT_UNWIND_FIND_FDE
@@ -208,4 +208,12 @@ object-suffixes-left := $(all-object-suffixes)
include $(o-iterator)
endif # do_f128_multiarch
+
+libm-sysdep_routines += e_log-ppc64
+
+ifeq ($(mcpu-power10), yes)
+libm-sysdep_routines += e_log-power10
+CFLAGS-e_log-power10.c += -mcpu=power10
+endif
+
endif
new file mode 100644
@@ -0,0 +1,33 @@
+# This file is generated from configure.ac by Autoconf. DO NOT EDIT!
+
+OLD_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -mcpu=power10"
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking if the compiler supports -mcpu=power10" >&5
+$as_echo_n "checking if the compiler supports -mcpu=power10... " >&6; }
+if ${libc_cv_mcpu_power10+:} false; then :
+ $as_echo_n "(cached) " >&6
+else
+
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ libc_cv_mcpu_power10=yes
+else
+ libc_cv_mcpu_power10=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $libc_cv_mcpu_power10" >&5
+$as_echo "$libc_cv_mcpu_power10" >&6; }
+config_vars="$config_vars
+mcpu-power10 = $libc_cv_mcpu_power10"
+if test "$libc_cv_mcpu_power10" == "yes"; then :
+
+ $as_echo "#define USE_PPC64_MCPU_POWER10 1" >>confdefs.h
+
+fi
+CFLAGS="$OLD_CFLAGS"
new file mode 100644
@@ -0,0 +1,14 @@
+GLIBC_PROVIDES dnl See aclocal.m4 in the top level source directory.
+
+OLD_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -mcpu=power10"
+AC_CACHE_CHECK([if the compiler supports -mcpu=power10],
+ libc_cv_mcpu_power10, [
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+]])],
+ [libc_cv_mcpu_power10=yes],
+ [libc_cv_mcpu_power10=no])])
+LIBC_CONFIG_VAR([mcpu-power10], [$libc_cv_mcpu_power10])
+AS_IF([[test "$libc_cv_mcpu_power10" == "yes"]],[
+ AC_DEFINE(USE_PPC64_MCPU_POWER10)])
+CFLAGS="$OLD_CFLAGS"
new file mode 100644
@@ -0,0 +1,4 @@
+#include <math.h>
+
+#define __log __log_power10
+#include <sysdeps/ieee754/dbl-64/e_log.c>
new file mode 100644
@@ -0,0 +1,4 @@
+#include <math.h>
+#define __log __log_ppc64
+
+#include <sysdeps/ieee754/dbl-64/e_log.c>
new file mode 100644
@@ -0,0 +1,37 @@
+/* Multiple versions of IEEE 754 log.
+ Copyright (C) 2021 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
+ <https://www.gnu.org/licenses/>. */
+
+#include <math.h>
+#include "init-arch.h"
+#include <libm-alias-finite.h>
+
+extern double __redirect_ieee754_log (double);
+
+extern __typeof (log) __log_ppc64 attribute_hidden;
+#ifdef USE_PPC64_MCPU_POWER10
+extern __typeof (log) __log_power10 attribute_hidden;
+#endif
+
+libc_ifunc_redirected (__redirect_ieee754_log, __ieee754_log,
+#ifdef USE_PPC64_MCPU_POWER10
+ (hwcap2 & PPC_FEATURE2_ARCH_3_1)
+ ? __log_power10 :
+#endif
+ __log_ppc64);
+
+libm_alias_finite (__ieee754_log, __log)
new file mode 100644
@@ -0,0 +1 @@
+#include <sysdeps/../math/w_log.c>