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/* 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__) */
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