/*
	ENDIANAC.h

	Copyright (C) 2006 Bernd Schmidt, Paul C. Pratt

	You can redistribute this file and/or modify it under the terms
	of version 2 of the GNU General Public License as published by
	the Free Software Foundation.  You should have received a copy
	of the license along with this file; see the file COPYING.

	This file 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
	license for more details.
*/

/*
	ENDIAN ACcess

	Deals with endian issues in memory access.

	This code is adapted from code in the Un*x Amiga Emulator by
	Bernd Schmidt, as found in vMac by Philip Cummins.
*/

#ifdef ENDIANAC_H
#ifndef AllFiles
#error "header already included"
#endif
#else
#define ENDIANAC_H
#endif

#define do_get_mem_byte(a) (*((ui3b *)(a)))

#if BigEndianUnaligned
#define do_get_mem_word(a) (*((ui4b *)(a)))
#else
static MayInline ui4b do_get_mem_word(ui3p a)
{
	ui3b *b = a;

	return (*b << 8) | (*(b + 1));
}
#endif

#if BigEndianUnaligned
#define do_get_mem_long(a) (*((ui5b *)(a)))
#else
static MayInline ui5b do_get_mem_long(ui3p a)
{
	ui3b *b = a;

	return (*b << 24) | (*(b + 1) << 16)
		| (*(b + 2) << 8) | (*(b + 3));
}
#endif

#define do_put_mem_byte(a, v) ((*((ui3b *)(a))) = (v))

#if BigEndianUnaligned
#define do_put_mem_word(a, v) ((*((ui4b *)(a))) = (v))
#else
static MayInline void do_put_mem_word(ui3p a, ui4b v)
{
	ui3b *b = a;

	*b = v >> 8;
	*(b + 1) = v;
}
#endif

#if BigEndianUnaligned
#define do_put_mem_long(a, v) ((*((ui5b *)(a))) = (v))
#else
static MayInline void do_put_mem_long(ui3p a, ui5b v)
{
	ui3b *b = a;

	*b = v >> 24;
	*(b + 1) = v >> 16;
	*(b + 2) = v >> 8;
	*(b + 3) = v;
}
#endif