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dtrace.c
(462.18 KB)
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dtrace_xoroshiro128_plus.c
(2.71 KB)
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dtrace_xoroshiro128_plus.h
(1.81 KB)
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fasttrap.c
(69.53 KB)
Editing: dtrace_xoroshiro128_plus.c
/*- * Copyright (c) 2016 (Graeme Jenkinson) * All rights reserved. * * This software was developed by BAE Systems, the University of Cambridge * Computer Laboratory, and Memorial University under DARPA/AFRL contract * FA8650-15-C-7558 ("CADETS"), as part of the DARPA Transparent Computing * (TC) research program. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include <sys/types.h> #include "dtrace_xoroshiro128_plus.h" static __inline uint64_t rotl(const uint64_t x, int k) { return (x << k) | (x >> (64 - k)); } /* * This is the jump function for the generator. It is equivalent to 2^64 calls * to next(); it can be used to generate 2^64 non-overlapping subsequences for * parallel computations. */ void dtrace_xoroshiro128_plus_jump(uint64_t * const state, uint64_t * const jump_state) { static const uint64_t JUMP[] = { 0xbeac0467eba5facb, 0xd86b048b86aa9922 }; uint64_t s0 = 0; uint64_t s1 = 0; int i = 0; int b = 0; for (i = 0; i < sizeof JUMP / sizeof *JUMP; i++) { for (b = 0; b < 64; b++) { if (JUMP[i] & 1ULL << b) { s0 ^= state[0]; s1 ^= state[1]; } dtrace_xoroshiro128_plus_next(state); } } jump_state[0] = s0; jump_state[1] = s1; } /* * xoroshiro128+ - XOR/rotate/shift/rotate * xorshift.di.unimi.it */ uint64_t dtrace_xoroshiro128_plus_next(uint64_t * const state) { const uint64_t s0 = state[0]; uint64_t s1 = state[1]; uint64_t result; result = s0 + s1; s1 ^= s0; state[0] = rotl(s0, 55) ^ s1 ^ (s1 << 14); state[1] = rotl(s1, 36); return result; }
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