| // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later |
| /* Copyright 2013-2016 IBM Corp. */ |
| |
| #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 from 'v' according to mask 'm' */ |
| #define GETFIELD(m, v) (((v) & (m)) >> MASK_TO_LSH(m)) |
| |
| /* Set field specified by mask 'm' of 'v' to value 'val' |
| * NOTE: 'v' 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 */ |
