[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/sysdeps/powerpc/hwcapinfo.c b/ap/libc/glibc/glibc-2.23/sysdeps/powerpc/hwcapinfo.c
new file mode 100644
index 0000000..31a7c5d
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/sysdeps/powerpc/hwcapinfo.c
@@ -0,0 +1,84 @@
+/* powerpc HWCAP/HWCAP2 and AT_PLATFORM data pre-processing.
+ Copyright (C) 2015-2016 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 <unistd.h>
+#include <shlib-compat.h>
+#include <dl-procinfo.h>
+
+uint64_t __tcb_hwcap __attribute__ ((visibility ("hidden")));
+uint32_t __tcb_platform __attribute__ ((visibility ("hidden")));
+
+/* This function parses the HWCAP/HWCAP2 fields, adding the previous supported
+ ISA bits, as well as converting the AT_PLATFORM string to a number. This
+ data is stored in two global variables that can be used later by the
+ powerpc-specific code to store it into the TCB. */
+void
+__tcb_parse_hwcap_and_convert_at_platform (void)
+{
+
+ uint64_t h1, h2;
+
+ /* Read AT_PLATFORM string from auxv and convert it to a number. */
+ __tcb_platform = _dl_string_platform (GLRO (dl_platform));
+
+ /* Read HWCAP and HWCAP2 from auxv. */
+ h1 = GLRO (dl_hwcap);
+ h2 = GLRO (dl_hwcap2);
+
+ /* hwcap contains only the latest supported ISA, the code checks which is
+ and fills the previous supported ones. */
+
+ if (h2 & PPC_FEATURE2_ARCH_2_07)
+ h1 |= PPC_FEATURE_ARCH_2_06
+ | PPC_FEATURE_ARCH_2_05
+ | PPC_FEATURE_POWER5_PLUS
+ | PPC_FEATURE_POWER5
+ | PPC_FEATURE_POWER4;
+ else if (h1 & PPC_FEATURE_ARCH_2_06)
+ h1 |= PPC_FEATURE_ARCH_2_05
+ | PPC_FEATURE_POWER5_PLUS
+ | PPC_FEATURE_POWER5
+ | PPC_FEATURE_POWER4;
+ else if (h1 & PPC_FEATURE_ARCH_2_05)
+ h1 |= PPC_FEATURE_POWER5_PLUS
+ | PPC_FEATURE_POWER5
+ | PPC_FEATURE_POWER4;
+ else if (h1 & PPC_FEATURE_POWER5_PLUS)
+ h1 |= PPC_FEATURE_POWER5
+ | PPC_FEATURE_POWER4;
+ else if (h1 & PPC_FEATURE_POWER5)
+ h1 |= PPC_FEATURE_POWER4;
+
+ /* Consolidate both HWCAP and HWCAP2 into a single doubleword so that
+ we can read both in a single load later. */
+ __tcb_hwcap = h2;
+ __tcb_hwcap = (h1 << 32) | __tcb_hwcap;
+
+}
+#if IS_IN (rtld)
+versioned_symbol (ld, __tcb_parse_hwcap_and_convert_at_platform, \
+ __parse_hwcap_and_convert_at_platform, GLIBC_2_23);
+#endif
+
+/* Export __parse_hwcap_and_convert_at_platform in libc.a. This is used by
+ GCC to make sure that the HWCAP/Platform bits are stored in the TCB when
+ using __builtin_cpu_is()/__builtin_cpu_supports() in the static case. */
+#ifndef SHARED
+weak_alias (__tcb_parse_hwcap_and_convert_at_platform, \
+ __parse_hwcap_and_convert_at_platform);
+#endif