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hypernewbie/uaa_minimal_rng.h

Created April 14, 2026 08:55
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Probably Good Enough Man RNG
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uaa_minimal_rng.h
/*
-- Probably Good Enough Man RNG --
Copyright 2025 UAA Software
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 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*/
#pragma once
// "Probably good enough man" random number generator.
// Simple minimal PCG-XSH.
/*
#=============================================================================#
# dieharder version 3.31.1 Copyright 2003 Robert G. Brown #
#=============================================================================#
rng_name |rands/second| Seed |
stdin_input_raw| 5.45e+07 |3873166694|
#=============================================================================#
test_name |ntup| tsamples |psamples| p-value |Assessment
#=============================================================================#
diehard_birthdays| 0| 100| 100|0.17284668| PASSED
diehard_operm5| 0| 1000000| 100|0.13308952| PASSED
diehard_rank_32x32| 0| 40000| 100|0.84844902| PASSED
diehard_rank_6x8| 0| 100000| 100|0.97465724| PASSED
diehard_bitstream| 0| 2097152| 100|0.94826668| PASSED
diehard_opso| 0| 2097152| 100|0.41832243| PASSED
diehard_oqso| 0| 2097152| 100|0.58798942| PASSED
diehard_dna| 0| 2097152| 100|0.51745935| PASSED
diehard_count_1s_str| 0| 256000| 100|0.10421224| PASSED
diehard_count_1s_byt| 0| 256000| 100|0.00921948| PASSED
diehard_parking_lot| 0| 12000| 100|0.83939978| PASSED
diehard_2dsphere| 2| 8000| 100|0.40675547| PASSED
diehard_3dsphere| 3| 4000| 100|0.01700233| PASSED
diehard_squeeze| 0| 100000| 100|0.96539327| PASSED
diehard_sums| 0| 100| 100|0.27741781| PASSED
diehard_runs| 0| 100000| 100|0.67515780| PASSED
diehard_runs| 0| 100000| 100|0.82216258| PASSED
diehard_craps| 0| 200000| 100|0.16487021| PASSED
diehard_craps| 0| 200000| 100|0.48224290| PASSED
marsaglia_tsang_gcd| 0| 10000000| 100|0.13358157| PASSED
marsaglia_tsang_gcd| 0| 10000000| 100|0.43385874| PASSED
sts_monobit| 1| 100000| 100|0.77764370| PASSED
sts_runs| 2| 100000| 100|0.61313334| PASSED
sts_serial| 1| 100000| 100|0.92987667| PASSED
sts_serial| 2| 100000| 100|0.77099969| PASSED
sts_serial| 3| 100000| 100|0.96370365| PASSED
sts_serial| 3| 100000| 100|0.78437736| PASSED
sts_serial| 4| 100000| 100|0.97440019| PASSED
sts_serial| 4| 100000| 100|0.94659304| PASSED
sts_serial| 5| 100000| 100|0.93811385| PASSED
sts_serial| 5| 100000| 100|0.99589110| WEAK
sts_serial| 6| 100000| 100|0.11839474| PASSED
sts_serial| 6| 100000| 100|0.09204312| PASSED
sts_serial| 7| 100000| 100|0.06253259| PASSED
sts_serial| 7| 100000| 100|0.64371364| PASSED
sts_serial| 8| 100000| 100|0.98416872| PASSED
sts_serial| 8| 100000| 100|0.16312345| PASSED
sts_serial| 9| 100000| 100|0.28979877| PASSED
sts_serial| 9| 100000| 100|0.22115990| PASSED
sts_serial| 10| 100000| 100|0.29104074| PASSED
sts_serial| 10| 100000| 100|0.44347023| PASSED
sts_serial| 11| 100000| 100|0.98428813| PASSED
sts_serial| 11| 100000| 100|0.45843211| PASSED
sts_serial| 12| 100000| 100|0.39065907| PASSED
sts_serial| 12| 100000| 100|0.76216306| PASSED
sts_serial| 13| 100000| 100|0.68391770| PASSED
sts_serial| 13| 100000| 100|0.38954473| PASSED
sts_serial| 14| 100000| 100|0.49493082| PASSED
sts_serial| 14| 100000| 100|0.19332370| PASSED
sts_serial| 15| 100000| 100|0.84943830| PASSED
sts_serial| 15| 100000| 100|0.29194005| PASSED
sts_serial| 16| 100000| 100|0.97324780| PASSED
sts_serial| 16| 100000| 100|0.74424089| PASSED
rgb_bitdist| 1| 100000| 100|0.29831187| PASSED
rgb_bitdist| 2| 100000| 100|0.99080887| PASSED
rgb_bitdist| 3| 100000| 100|0.14626650| PASSED
rgb_bitdist| 4| 100000| 100|0.28058380| PASSED
rgb_bitdist| 5| 100000| 100|0.05111328| PASSED
rgb_bitdist| 6| 100000| 100|0.52716469| PASSED
rgb_bitdist| 7| 100000| 100|0.06444692| PASSED
rgb_bitdist| 8| 100000| 100|0.90438867| PASSED
rgb_bitdist| 9| 100000| 100|0.52740761| PASSED
rgb_bitdist| 10| 100000| 100|0.98208154| PASSED
rgb_bitdist| 11| 100000| 100|0.44055074| PASSED
rgb_bitdist| 12| 100000| 100|0.36559355| PASSED
rgb_minimum_distance| 2| 10000| 1000|0.16143961| PASSED
rgb_minimum_distance| 3| 10000| 1000|0.92830517| PASSED
rgb_minimum_distance| 4| 10000| 1000|0.11175826| PASSED
rgb_minimum_distance| 5| 10000| 1000|0.67246146| PASSED
rgb_permutations| 2| 100000| 100|0.68154139| PASSED
rgb_permutations| 3| 100000| 100|0.67537055| PASSED
rgb_permutations| 4| 100000| 100|0.77941872| PASSED
rgb_permutations| 5| 100000| 100|0.11556789| PASSED
rgb_lagged_sum| 0| 1000000| 100|0.58484577| PASSED
rgb_lagged_sum| 1| 1000000| 100|0.54678215| PASSED
rgb_lagged_sum| 2| 1000000| 100|0.92743335| PASSED
rgb_lagged_sum| 3| 1000000| 100|0.92996864| PASSED
rgb_lagged_sum| 4| 1000000| 100|0.83647382| PASSED
rgb_lagged_sum| 5| 1000000| 100|0.72155964| PASSED
rgb_lagged_sum| 6| 1000000| 100|0.98075056| PASSED
rgb_lagged_sum| 7| 1000000| 100|0.37013213| PASSED
rgb_lagged_sum| 8| 1000000| 100|0.99641966| WEAK
rgb_lagged_sum| 9| 1000000| 100|0.45250405| PASSED
rgb_lagged_sum| 10| 1000000| 100|0.90352686| PASSED
rgb_lagged_sum| 11| 1000000| 100|0.06468166| PASSED
rgb_lagged_sum| 12| 1000000| 100|0.70670636| PASSED
rgb_lagged_sum| 13| 1000000| 100|0.10060853| PASSED
rgb_lagged_sum| 14| 1000000| 100|0.71134791| PASSED
rgb_lagged_sum| 15| 1000000| 100|0.99486339| PASSED
rgb_lagged_sum| 16| 1000000| 100|0.33155157| PASSED
rgb_lagged_sum| 17| 1000000| 100|0.24995772| PASSED
rgb_lagged_sum| 18| 1000000| 100|0.92537673| PASSED
rgb_lagged_sum| 19| 1000000| 100|0.60563909| PASSED
rgb_lagged_sum| 20| 1000000| 100|0.14956213| PASSED
rgb_lagged_sum| 21| 1000000| 100|0.63948516| PASSED
rgb_lagged_sum| 22| 1000000| 100|0.20094497| PASSED
rgb_lagged_sum| 23| 1000000| 100|0.66183222| PASSED
rgb_lagged_sum| 24| 1000000| 100|0.92940137| PASSED
rgb_lagged_sum| 25| 1000000| 100|0.18262992| PASSED
rgb_lagged_sum| 26| 1000000| 100|0.99824894| WEAK
rgb_lagged_sum| 27| 1000000| 100|0.80837526| PASSED
rgb_lagged_sum| 28| 1000000| 100|0.37200271| PASSED
rgb_lagged_sum| 29| 1000000| 100|0.86687515| PASSED
rgb_lagged_sum| 30| 1000000| 100|0.16364288| PASSED
rgb_lagged_sum| 31| 1000000| 100|0.04827008| PASSED
rgb_lagged_sum| 32| 1000000| 100|0.00874305| PASSED
rgb_kstest_test| 0| 10000| 1000|0.48580196| PASSED
dab_bytedistrib| 0| 51200000| 1|0.49278834| PASSED
dab_dct| 256| 50000| 1|0.85577764| PASSED
dab_filltree| 32| 15000000| 1|0.65691243| PASSED
dab_filltree| 32| 15000000| 1|0.81826673| PASSED
dab_filltree2| 0| 5000000| 1|0.27231327| PASSED
dab_filltree2| 1| 5000000| 1|0.78593282| PASSED
dab_monobit2| 12| 65000000| 1|0.69032366| PASSED
*/
inline uint32_t uaa_rng_u32( uint64_t& seed )
{
static uint64_t LCG_MULT = 87803ULL;
static uint64_t LCG_INC = 9739733ULL;
seed ^= (seed << 11);
seed ^= (seed >> 21);
seed = LCG_MULT * seed + LCG_INC;
return ( uint32_t ) ( seed & 0xFFFFFFFF );
}
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