1 files changed, 118 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/config/arm/arm-libgcc2.c b/gcc-4.2.1/gcc/config/arm/arm-libgcc2.c
new file mode 100644
index 000000000..d81cc5080
--- /dev/null
+++ b/gcc-4.2.1/gcc/config/arm/arm-libgcc2.c
@@ -0,0 +1,118 @@
+/* This file contains libgcc2 functions we want to override for the
+   ARM target.  */
+
+/* Copyright (C) 2008  Free Software Foundation, Inc.
+
+   This file is part of GCC.
+
+   GCC is free software; you can redistribute it and/or modify it under
+   the terms of the GNU General Public License as published by the Free
+   Software Foundation; either version 2, or (at your option) any later
+   version.
+
+   In addition to the permissions in the GNU General Public License, the
+   Free Software Foundation gives you unlimited permission to link the
+   compiled version of this file into combinations with other programs,
+   and to distribute those combinations without any restriction coming
+   from the use of this file.  (The General Public License restrictions
+   do apply in other respects; for example, they cover modification of
+   the file, and distribution when not linked into a combine
+   executable.)
+
+   GCC 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 General Public License
+   for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with GCC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+   02110-1301, USA.  */
+
+#include "tconfig.h"
+#include "tsystem.h"
+#include "coretypes.h"
+#include "tm.h"
+
+#ifdef HAVE_GAS_HIDDEN
+#define ATTRIBUTE_HIDDEN  __attribute__ ((__visibility__ ("hidden")))
+#else
+#define ATTRIBUTE_HIDDEN
+#endif
+
+#ifndef MIN_UNITS_PER_WORD
+#define MIN_UNITS_PER_WORD UNITS_PER_WORD
+#endif
+
+#define LIBGCC2_UNITS_PER_WORD UNITS_PER_WORD
+
+#include "libgcc2.h"
+#undef int
+
+#define __ARM_ARCH__ 3
+
+#if defined(__ARM_ARCH_3M__) || defined(__ARM_ARCH_4__) \
+	|| defined(__ARM_ARCH_4T__)
+/* We use __ARM_ARCH__ set to 4 here, but in reality it's any processor with
+   long multiply instructions.  That includes v3M.  */
+# undef __ARM_ARCH__
+# define __ARM_ARCH__ 4
+#endif
+	
+#if defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5T__) \
+	|| defined(__ARM_ARCH_5E__) || defined(__ARM_ARCH_5TE__) \
+	|| defined(__ARM_ARCH_5TEJ__)
+# undef __ARM_ARCH__
+# define __ARM_ARCH__ 5
+#endif
+
+#if defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \
+	|| defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6Z__) \
+	|| defined(__ARM_ARCH_6ZK__)
+# undef __ARM_ARCH__
+# define __ARM_ARCH__ 6
+#endif
+
+#ifndef __ARM_ARCH__
+#error Unable to determine architecture.
+#endif
+
+/* The CLZ instruction is only available for some v5 architectures. */
+
+#if __ARM_ARCH__ < 6 \
+	&& !defined(__ARM_ARCH_5E__) && !defined(__ARM_ARCH_5TE__) \
+        && !defined(__ARM_ARCH_5TEJ__)
+
+/*  The C implementations of the clz*2 functions are only compiled for
+    architectures which lack the clz instruction.  For architectures
+    with the DSP extension,  we use the ones in lib1funcs.asm.  */
+    
+int
+__clzsi2 (USItype x)
+{
+  Wtype ret;
+
+  count_leading_zeros (ret, x);
+
+  return ret;
+}
+
+int
+__clzdi2 (UDItype x)
+{
+  const DWunion uu = {.ll = x};
+  UWtype word;
+  Wtype ret, add;
+
+  if (uu.s.high)
+    word = uu.s.high, add = 0;
+  else
+    word = uu.s.low, add = W_TYPE_SIZE;
+
+  count_leading_zeros (ret, word);
+  return ret + add;
+}
+
+#endif	/* __ARM_ARCH__ < 6  */ \
+	/* && !defined(__ARM_ARCH_5E__) && !defined(__ARM_ARCH_5TE__) */ \
+        /* && !defined(__ARM_ARCH_5TEJ__) */