| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| |
| /* Return X rotated left by N bits, where 0 < N < 64. */ |
| #define u64rol(x, n) u64or (u64shl (x, n), u64shr (x, 64 - n)) |
| |
| #ifdef UINT64_MAX |
| |
| /* Native implementations are trivial. See below for comments on what |
| these operations do. */ |
| typedef uint64_t u64; |
| # define u64hilo(hi, lo) ((u64) (((u64) (hi) << 32) + (lo))) |
| # define u64init(hi, lo) u64hilo (hi, lo) |
| # define u64lo(x) ((u64) (x)) |
| # define u64lt(x, y) ((x) < (y)) |
| # define u64and(x, y) ((x) & (y)) |
| # define u64or(x, y) ((x) | (y)) |
| # define u64xor(x, y) ((x) ^ (y)) |
| # define u64plus(x, y) ((x) + (y)) |
| # define u64shl(x, n) ((x) << (n)) |
| # define u64shr(x, n) ((x) >> (n)) |
| |
| #else |
| |
| /* u64 is a 64-bit unsigned integer value. |
| u64init (HI, LO), is like u64hilo (HI, LO), but for use in |
| initializer contexts. */ |
| # ifdef WORDS_BIGENDIAN |
| typedef struct { uint32_t hi, lo; } u64; |
| # define u64init(hi, lo) { hi, lo } |
| # else |
| typedef struct { uint32_t lo, hi; } u64; |
| # define u64init(hi, lo) { lo, hi } |
| # endif |
| |
| /* Given the high and low-order 32-bit quantities HI and LO, return a u64 |
| value representing (HI << 32) + LO. */ |
| static inline u64 |
| u64hilo (uint32_t hi, uint32_t lo) |
| { |
| u64 r; |
| r.hi = hi; |
| r.lo = lo; |
| return r; |
| } |
| |
| /* Return a u64 value representing LO. */ |
| static inline u64 |
| u64lo (uint32_t lo) |
| { |
| u64 r; |
| r.hi = 0; |
| r.lo = lo; |
| return r; |
| } |
| |
| /* Return X < Y. */ |
| static inline int |
| u64lt (u64 x, u64 y) |
| { |
| return x.hi < y.hi || (x.hi == y.hi && x.lo < y.lo); |
| } |
| |
| /* Return X & Y. */ |
| static inline u64 |
| u64and (u64 x, u64 y) |
| { |
| u64 r; |
| r.hi = x.hi & y.hi; |
| r.lo = x.lo & y.lo; |
| return r; |
| } |
| |
| /* Return X | Y. */ |
| static inline u64 |
| u64or (u64 x, u64 y) |
| { |
| u64 r; |
| r.hi = x.hi | y.hi; |
| r.lo = x.lo | y.lo; |
| return r; |
| } |
| |
| /* Return X ^ Y. */ |
| static inline u64 |
| u64xor (u64 x, u64 y) |
| { |
| u64 r; |
| r.hi = x.hi ^ y.hi; |
| r.lo = x.lo ^ y.lo; |
| return r; |
| } |
| |
| /* Return X + Y. */ |
| static inline u64 |
| u64plus (u64 x, u64 y) |
| { |
| u64 r; |
| r.lo = x.lo + y.lo; |
| r.hi = x.hi + y.hi + (r.lo < x.lo); |
| return r; |
| } |
| |
| /* Return X << N. */ |
| static inline u64 |
| u64shl (u64 x, int n) |
| { |
| u64 r; |
| if (n < 32) |
| { |
| r.hi = (x.hi << n) | (x.lo >> (32 - n)); |
| r.lo = x.lo << n; |
| } |
| else |
| { |
| r.hi = x.lo << (n - 32); |
| r.lo = 0; |
| } |
| return r; |
| } |
| |
| /* Return X >> N. */ |
| static inline u64 |
| u64shr (u64 x, int n) |
| { |
| u64 r; |
| if (n < 32) |
| { |
| r.hi = x.hi >> n; |
| r.lo = (x.hi << (32 - n)) | (x.lo >> n); |
| } |
| else |
| { |
| r.hi = 0; |
| r.lo = x.hi >> (n - 32); |
| } |
| return r; |
| } |
| |
| #endif |