PowerPC: initial support for multilib for PowerPC32

This patch add a empty Makefile, the C IFUNC helper macros, and a empty
available IFUNC implementation enumeration.

1 files changed, 50 insertions, 0 deletions

diff --git a/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
new file mode 100644
index 0000000000..f4e55aedfa
--- /dev/null
+++ b/sysdeps/powerpc/powerpc32/power4/multiarch/ifunc-impl-list.c
@@ -0,0 +1,50 @@
+/* Enumerate available IFUNC implementations of a function.  PowerPC32 version.
+   Copyright (C) 2013 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 <assert.h>
+#include <string.h>
+#include <wchar.h>
+#include <ldsodefs.h>
+#include <ifunc-impl-list.h>
+
+/* Maximum number of IFUNC implementations.  */
+#define MAX_IFUNC	6
+
+size_t
+__libc_ifunc_impl_list (const char *name, struct libc_ifunc_impl *array,
+			size_t max)
+{
+  assert (max >= MAX_IFUNC);
+
+  size_t i = 0;
+
+  unsigned long int hwcap = GLRO(dl_hwcap);
+  /* hwcap contains only the latest supported ISA, the code checks which is
+     and fills the previous supported ones.  */
+  if (hwcap & PPC_FEATURE_ARCH_2_06)
+    hwcap |= PPC_FEATURE_ARCH_2_05 | PPC_FEATURE_POWER5_PLUS |
+             PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
+  else if (hwcap & PPC_FEATURE_ARCH_2_05)
+    hwcap |= PPC_FEATURE_POWER5_PLUS | PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
+  else if (hwcap & PPC_FEATURE_POWER5_PLUS)
+    hwcap |= PPC_FEATURE_POWER5 | PPC_FEATURE_POWER4;
+  else if (hwcap & PPC_FEATURE_POWER5)
+    hwcap |= PPC_FEATURE_POWER4;
+
+  return i;
+}