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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef __BITUTILS_H
#define __BITUTILS_H
/* PPC bit number conversion */
#ifdef __ASSEMBLY__
#define PPC_BIT(bit) (0x8000000000000000 >> (bit))
#define PPC_BIT32(bit) (0x80000000 >> (bit))
#define PPC_BIT16(bit) (0x8000 >> (bit))
#define PPC_BIT8(bit) (0x80 >> (bit))
#else
#define PPC_BIT(bit) (0x8000000000000000UL >> (bit))
#define PPC_BIT32(bit) (0x80000000UL >> (bit))
#define PPC_BIT16(bit) (0x8000UL >> (bit))
#define PPC_BIT8(bit) (0x80UL >> (bit))
#endif
#define PPC_BITMASK(bs,be) ((PPC_BIT(bs) - PPC_BIT(be)) | PPC_BIT(bs))
#define PPC_BITMASK32(bs,be) ((PPC_BIT32(bs) - PPC_BIT32(be))|PPC_BIT32(bs))
#define PPC_BITMASK16(bs,be) ((PPC_BIT16(bs) - PPC_BIT16(be))|PPC_BIT16(bs))
#define PPC_BITMASK8(bs,be) ((PPC_BIT8(bs) - PPC_BIT8(be))|PPC_BIT8(bs))
#define PPC_BITLSHIFT(be) (63 - (be))
#define PPC_BITLSHIFT32(be) (31 - (be))
/*
* PPC bitmask field manipulation
*/
/* Find left shift from first set bit in mask */
#define MASK_TO_LSH(m) (__builtin_ffsl(m) - 1)
/* Extract field fname from val */
#define GETFIELD(m, v) (((v) & (m)) >> MASK_TO_LSH(m))
/* Set field fname of oval to fval
* NOTE: oval isn't modified, the combined result is returned
*/
#define SETFIELD(m, v, val) \
(((v) & ~(m)) | ((((typeof(v))(val)) << MASK_TO_LSH(m)) & (m)))
#endif /* __BITUTILS_H */
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