/*
 * Copyright 2010 Tom Stellard <tstellar@gmail.com>
 *
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial
 * portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */

/**
 * \file
 */

#include "radeon_compiler_util.h"

/**
 */
unsigned int rc_swizzle_to_writemask(unsigned int swz)
{
	unsigned int mask = 0;
	unsigned int i;

	for(i = 0; i < 4; i++) {
		mask |= 1 << GET_SWZ(swz, i);
	}
	mask &= RC_MASK_XYZW;

	return mask;
}

unsigned int rc_src_reads_dst_mask(
		rc_register_file src_file,
		unsigned int src_idx,
		unsigned int src_swz,
		rc_register_file dst_file,
		unsigned int dst_idx,
		unsigned int dst_mask)
{
	if (src_file != dst_file || src_idx != dst_idx) {
		return RC_MASK_NONE;
	}
	return dst_mask & rc_swizzle_to_writemask(src_swz);
}