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authorCharles Harris <charlesr.harris@gmail.com>2019-06-25 13:21:01 -0700
committerGitHub <noreply@github.com>2019-06-25 13:21:01 -0700
commit37a1ad069a800f5ef98286f25fb3fb632375168d (patch)
tree9cf8d4623be75cd7b2a467f430566df9b421f8a1 /numpy
parenta1cd310ea6192945b7f4e452ad5794b291da77a5 (diff)
parent578cf428470b6bcaaf5198b63acdabc251512612 (diff)
downloadnumpy-37a1ad069a800f5ef98286f25fb3fb632375168d.tar.gz
Merge pull request #13833 from mattip/remove-threefry
MAINT: remove ThreeFry BitGenerator
Diffstat (limited to 'numpy')
-rw-r--r--numpy/random/__init__.py4
-rw-r--r--numpy/random/_pickle.py2
-rw-r--r--numpy/random/philox.pyx2
-rw-r--r--numpy/random/setup.py3
-rw-r--r--numpy/random/src/philox/LICENSE.md2
-rw-r--r--numpy/random/src/threefry/LICENSE.md31
-rw-r--r--numpy/random/src/threefry/threefry-benchmark.c38
-rw-r--r--numpy/random/src/threefry/threefry-orig.c83
-rw-r--r--numpy/random/src/threefry/threefry-test-data-gen.c83
-rw-r--r--numpy/random/src/threefry/threefry.c29
-rw-r--r--numpy/random/src/threefry/threefry.h331
-rw-r--r--numpy/random/tests/data/threefry-testset-1.csv1001
-rw-r--r--numpy/random/tests/data/threefry-testset-2.csv1001
-rw-r--r--numpy/random/tests/test_direct.py25
-rw-r--r--numpy/random/tests/test_smoke.py14
-rw-r--r--numpy/random/threefry.pyx466
16 files changed, 5 insertions, 3110 deletions
diff --git a/numpy/random/__init__.py b/numpy/random/__init__.py
index cf4a874af..8240f691d 100644
--- a/numpy/random/__init__.py
+++ b/numpy/random/__init__.py
@@ -100,7 +100,6 @@ BitGenerator Streams that work with Generator
MT19937
PCG64
Philox
-ThreeFry
Xoshiro256
Xoshiro512
============================================= ===
@@ -167,13 +166,12 @@ from .generator import Generator
from .mt19937 import MT19937
from .pcg64 import PCG64
from .philox import Philox
-from .threefry import ThreeFry
from .xoshiro256 import Xoshiro256
from .xoshiro512 import Xoshiro512
from .mtrand import RandomState
__all__ += ['Generator', 'MT19937', 'Philox', 'PCG64',
- 'ThreeFry', 'Xoshiro256', 'Xoshiro512', 'RandomState']
+ 'Xoshiro256', 'Xoshiro512', 'RandomState']
def __RandomState_ctor():
diff --git a/numpy/random/_pickle.py b/numpy/random/_pickle.py
index bb637a69c..d7f84f3d8 100644
--- a/numpy/random/_pickle.py
+++ b/numpy/random/_pickle.py
@@ -1,6 +1,5 @@
from .mtrand import RandomState
from .philox import Philox
-from .threefry import ThreeFry
from .pcg64 import PCG64
from .xoshiro256 import Xoshiro256
from .xoshiro512 import Xoshiro512
@@ -11,7 +10,6 @@ from .mt19937 import MT19937
BitGenerators = {'MT19937': MT19937,
'PCG64': PCG64,
'Philox': Philox,
- 'ThreeFry': ThreeFry,
'Xoshiro256': Xoshiro256,
'Xoshiro512': Xoshiro512
}
diff --git a/numpy/random/philox.pyx b/numpy/random/philox.pyx
index 91dd3e7dd..c89a52a99 100644
--- a/numpy/random/philox.pyx
+++ b/numpy/random/philox.pyx
@@ -102,8 +102,6 @@ cdef class Philox:
directly consumable in Python and must be consumed by a ``Generator``
or similar object that supports low-level access.
- See ``ThreeFry`` for a closely related PRNG.
-
**State and Seeding**
The ``Philox`` state vector consists of a 2 256-bit values encoded as
diff --git a/numpy/random/setup.py b/numpy/random/setup.py
index f00373233..29f798180 100644
--- a/numpy/random/setup.py
+++ b/numpy/random/setup.py
@@ -85,8 +85,7 @@ def configuration(parent_package='', top_path=None):
depends=['%s.pyx' % gen],
define_macros=defs,
)
- for gen in ['philox', 'threefry', 'xoshiro256', 'xoshiro512',
- 'pcg64']:
+ for gen in ['philox', 'xoshiro256', 'xoshiro512', 'pcg64']:
# gen.pyx, src/gen/gen.c
_defs = defs + PCG64_DEFS if gen == 'pcg64' else defs
config.add_extension(gen,
diff --git a/numpy/random/src/philox/LICENSE.md b/numpy/random/src/philox/LICENSE.md
index 4a9f6bb29..9738e44de 100644
--- a/numpy/random/src/philox/LICENSE.md
+++ b/numpy/random/src/philox/LICENSE.md
@@ -1,4 +1,4 @@
-# THREEFRY
+# PHILOX
Copyright 2010-2012, D. E. Shaw Research.
All rights reserved.
diff --git a/numpy/random/src/threefry/LICENSE.md b/numpy/random/src/threefry/LICENSE.md
deleted file mode 100644
index 4a9f6bb29..000000000
--- a/numpy/random/src/threefry/LICENSE.md
+++ /dev/null
@@ -1,31 +0,0 @@
-# THREEFRY
-
-Copyright 2010-2012, D. E. Shaw Research.
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-* Redistributions of source code must retain the above copyright
- notice, this list of conditions, and the following disclaimer.
-
-* 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.
-
-* Neither the name of D. E. Shaw Research nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
-OWNER 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.
diff --git a/numpy/random/src/threefry/threefry-benchmark.c b/numpy/random/src/threefry/threefry-benchmark.c
deleted file mode 100644
index 5e2cfe844..000000000
--- a/numpy/random/src/threefry/threefry-benchmark.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*
- * Simple benchamrk command
- *
- * cl threefry-benchmark.c /Ox
- *
- * gcc threefry-benchmark.c -O3 -o threefry-benchmark
- *
- * Requires the Random123 directory containing header files to be located in the
- * same directory (not included).
- */
-#include "Random123/threefry.h"
-#include <inttypes.h>
-#include <stdio.h>
-#include <time.h>
-
-#define N 1000000000
-
-int main() {
- threefry4x64_key_t ctr = {{0, 0, 0, 0}};
- threefry4x64_ctr_t key = {{0xDEADBEAF, 0, 0, 0}};
- threefry4x64_ctr_t out;
- uint64_t count = 0, sum = 0;
- int i, j;
- clock_t begin = clock();
- for (i = 0; i < N / 4UL; i++) {
- ctr.v[0]++;
- out = threefry4x64_R(threefry4x64_rounds, ctr, key);
- for (j = 0; j < 4; j++) {
- sum += out.v[j];
- count++;
- }
- }
- clock_t end = clock();
- double time_spent = (double)(end - begin) / CLOCKS_PER_SEC;
- printf("0x%" PRIx64 "\ncount: %" PRIu64 "\n", sum, count);
- printf("%" PRIu64 " randoms per second\n",
- (uint64_t)(N / time_spent) / 1000000 * 1000000);
-}
diff --git a/numpy/random/src/threefry/threefry-orig.c b/numpy/random/src/threefry/threefry-orig.c
deleted file mode 100644
index d27cfd797..000000000
--- a/numpy/random/src/threefry/threefry-orig.c
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
-Copyright (c) 2017, Pierre de Buyl
-
-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.
-
-3. Neither the name of the copyright holder nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
-HOLDER 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 "threefry.h"
-#include <stdint.h>
-
-#define N_WORDS 2
-#define KEY_LENGTH 3
-#define C240 0x1BD11BDAA9FC1A22
-#define N_ROUNDS 20
-#define MASK 0xffffffffffffffff
-#define DOUBLE_MULT 5.421010862427522e-20
-
-static const int ROTATION[] = {16, 42, 12, 31, 16, 32, 24, 21};
-
-uint64_t rotl_64(uint64_t x, int d) { return ((x << d) | (x >> (64 - d))); }
-
-threefry_t mix(threefry_t x, int R) {
- x.c0 += x.c1;
- x.c1 = rotl_64(x.c1, R) ^ x.c0;
- return x;
-}
-
-threefry_t threefry(threefry_t p, threefry_t k) {
- uint64_t K[] = {k.c0, k.c1, C240 ^ k.c0 ^ k.c1};
- int rmod4, rdiv4;
- threefry_t x;
- x = p;
- for (int r = 0; r < N_ROUNDS; r++) {
- rmod4 = r % 4;
- if (rmod4 == 0) {
- rdiv4 = r / 4;
- x.c0 += K[rdiv4 % KEY_LENGTH];
- x.c1 += K[(rdiv4 + 1) % KEY_LENGTH] + rdiv4;
- }
- x = mix(x, ROTATION[r % 8]);
- }
- x.c0 += K[(N_ROUNDS / 4) % KEY_LENGTH];
- x.c1 += K[(N_ROUNDS / 4 + 1) % KEY_LENGTH] + N_ROUNDS / 4;
- return x;
-}
-
-uint64_t threefry_uint64(threefry_t *c, threefry_t *k) {
- threefry_t x;
- x = threefry(*c, *k);
- c->c0++;
- return x.c0;
-}
-
-double threefry_double(threefry_t *c, threefry_t *k) {
- threefry_t x;
- x = threefry(*c, *k);
- c->c0++;
- return x.c0 * DOUBLE_MULT;
-}
diff --git a/numpy/random/src/threefry/threefry-test-data-gen.c b/numpy/random/src/threefry/threefry-test-data-gen.c
deleted file mode 100644
index 8514a227e..000000000
--- a/numpy/random/src/threefry/threefry-test-data-gen.c
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Generate testing csv files
- *
- * cl threefry-test-data-gen.c /Ox ../splitmix64/splitmix64.c /Ox
- * threefry-test-data-gen.exe
- *
- * gcc threefry-test-data-gen.c ../splitmix64/splitmix64.c /Ox -o
- * threefry-test-data-gen
- * ./threefry-test-data-gen
- *
- * Requires the Random123 directory containing header files to be located in the
- * same directory (not included).
- *
- */
-
-#include "../splitmix64/splitmix64.h"
-#include "Random123/threefry.h"
-#include <inttypes.h>
-#include <stdio.h>
-
-#define N 1000
-
-int main() {
- threefry4x64_key_t ctr = {{0, 0, 0, 0}};
- uint64_t state, seed = 0xDEADBEAF;
- state = seed;
- threefry4x64_ctr_t key = {{0}};
- threefry4x64_ctr_t out;
- uint64_t store[N];
- int i, j;
- for (i = 0; i < 4; i++) {
- key.v[i] = splitmix64_next(&state);
- }
- for (i = 0; i < N / 4UL; i++) {
- ctr.v[0]++;
- out = threefry4x64_R(threefry4x64_rounds, ctr, key);
- for (j = 0; j < 4; j++) {
- store[i * 4 + j] = out.v[j];
- }
- }
-
- FILE *fp;
- fp = fopen("threefry-testset-1.csv", "w");
- if (fp == NULL) {
- printf("Couldn't open file\n");
- return -1;
- }
- fprintf(fp, "seed, 0x%" PRIx64 "\n", seed);
- for (i = 0; i < N; i++) {
- fprintf(fp, "%d, 0x%" PRIx64 "\n", i, store[i]);
- if (i == 999) {
- printf("%d, 0x%" PRIx64 "\n", i, store[i]);
- }
- }
- fclose(fp);
-
- ctr.v[0] = 0;
- state = seed = 0;
- for (i = 0; i < 4; i++) {
- key.v[i] = splitmix64_next(&state);
- }
- for (i = 0; i < N / 4; i++) {
- ctr.v[0]++;
- out = threefry4x64_R(threefry4x64_rounds, ctr, key);
- for (j = 0; j < 4; j++) {
- store[i * 4 + j] = out.v[j];
- }
- }
-
- fp = fopen("threefry-testset-2.csv", "w");
- if (fp == NULL) {
- printf("Couldn't open file\n");
- return -1;
- }
- fprintf(fp, "seed, 0x%" PRIx64 "\n", seed);
- for (i = 0; i < N; i++) {
- fprintf(fp, "%d, 0x%" PRIx64 "\n", i, store[i]);
- if (i == 999) {
- printf("%d, 0x%" PRIx64 "\n", i, store[i]);
- }
- }
- fclose(fp);
-}
diff --git a/numpy/random/src/threefry/threefry.c b/numpy/random/src/threefry/threefry.c
deleted file mode 100644
index 55d3c022a..000000000
--- a/numpy/random/src/threefry/threefry.c
+++ /dev/null
@@ -1,29 +0,0 @@
-#include "threefry.h"
-
-extern NPY_INLINE uint64_t threefry_next64(threefry_state *state);
-
-extern NPY_INLINE uint32_t threefry_next32(threefry_state *state);
-
-extern void threefry_jump(threefry_state *state) {
- /* Advances state as-if 2^128 draws were made */
- state->ctr->v[2]++;
- if (state->ctr->v[2] == 0) {
- state->ctr->v[3]++;
- }
-}
-
-extern void threefry_advance(uint64_t *step, threefry_state *state) {
- int i, carry = 0;
- uint64_t v_orig;
- for (i = 0; i < 4; i++) {
- if (carry == 1) {
- state->ctr->v[i]++;
- carry = state->ctr->v[i] == 0 ? 1 : 0;
- }
- v_orig = state->ctr->v[i];
- state->ctr->v[i] += step[i];
- if (state->ctr->v[i] < v_orig && carry == 0) {
- carry = 1;
- }
- }
-}
diff --git a/numpy/random/src/threefry/threefry.h b/numpy/random/src/threefry/threefry.h
deleted file mode 100644
index 596b57e12..000000000
--- a/numpy/random/src/threefry/threefry.h
+++ /dev/null
@@ -1,331 +0,0 @@
-/*
-Adapted from random123's threefry.h
-*/
-#ifndef _RANDOMDGEN__THREEFRY_H_
-#define _RANDOMDGEN__THREEFRY_H_
-
-#include <inttypes.h>
-#include "numpy/npy_common.h"
-
-#define THREEFRY_BUFFER_SIZE 4L
-
-enum r123_enum_threefry64x4 {
- /* These are the R_256 constants from the Threefish reference sources
- with names changed to R_64x4... */
- R_64x4_0_0 = 14,
- R_64x4_0_1 = 16,
- R_64x4_1_0 = 52,
- R_64x4_1_1 = 57,
- R_64x4_2_0 = 23,
- R_64x4_2_1 = 40,
- R_64x4_3_0 = 5,
- R_64x4_3_1 = 37,
- R_64x4_4_0 = 25,
- R_64x4_4_1 = 33,
- R_64x4_5_0 = 46,
- R_64x4_5_1 = 12,
- R_64x4_6_0 = 58,
- R_64x4_6_1 = 22,
- R_64x4_7_0 = 32,
- R_64x4_7_1 = 32
-};
-
-struct r123array4x64 {
- uint64_t v[4];
-}; /* r123array4x64 */
-
-typedef struct r123array4x64 threefry4x64_key_t;
-typedef struct r123array4x64 threefry4x64_ctr_t;
-
-static NPY_INLINE uint64_t RotL_64(uint64_t x, unsigned int N);
-static NPY_INLINE uint64_t RotL_64(uint64_t x, unsigned int N) {
- return (x << (N & 63)) | (x >> ((64 - N) & 63));
-}
-
-static NPY_INLINE threefry4x64_ctr_t threefry4x64_R(unsigned int Nrounds,
- threefry4x64_ctr_t in,
- threefry4x64_key_t k);
-static NPY_INLINE threefry4x64_ctr_t threefry4x64_R(unsigned int Nrounds,
- threefry4x64_ctr_t in,
- threefry4x64_key_t k) {
- threefry4x64_ctr_t X;
- uint64_t ks[4 + 1];
- int i;
- ks[4] = ((0xA9FC1A22) + (((uint64_t)(0x1BD11BDA)) << 32));
- for (i = 0; i < 4; i++) {
- ks[i] = k.v[i];
- X.v[i] = in.v[i];
- ks[4] ^= k.v[i];
- }
- X.v[0] += ks[0];
- X.v[1] += ks[1];
- X.v[2] += ks[2];
- X.v[3] += ks[3];
- if (Nrounds > 0) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_0_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_0_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 1) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_1_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_1_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 2) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_2_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_2_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 3) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_3_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_3_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 3) {
- X.v[0] += ks[1];
- X.v[1] += ks[2];
- X.v[2] += ks[3];
- X.v[3] += ks[4];
- X.v[4 - 1] += 1;
- }
- if (Nrounds > 4) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_4_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_4_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 5) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_5_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_5_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 6) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_6_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_6_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 7) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_7_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_7_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 7) {
- X.v[0] += ks[2];
- X.v[1] += ks[3];
- X.v[2] += ks[4];
- X.v[3] += ks[0];
- X.v[4 - 1] += 2;
- }
- if (Nrounds > 8) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_0_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_0_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 9) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_1_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_1_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 10) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_2_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_2_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 11) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_3_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_3_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 11) {
- X.v[0] += ks[3];
- X.v[1] += ks[4];
- X.v[2] += ks[0];
- X.v[3] += ks[1];
- X.v[4 - 1] += 3;
- }
- if (Nrounds > 12) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_4_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_4_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 13) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_5_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_5_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 14) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_6_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_6_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 15) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_7_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_7_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 15) {
- X.v[0] += ks[4];
- X.v[1] += ks[0];
- X.v[2] += ks[1];
- X.v[3] += ks[2];
- X.v[4 - 1] += 4;
- }
- if (Nrounds > 16) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_0_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_0_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 17) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_1_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_1_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 18) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_2_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_2_1);
- X.v[3] ^= X.v[2];
- }
- if (Nrounds > 19) {
- X.v[0] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_3_0);
- X.v[3] ^= X.v[0];
- X.v[2] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_3_1);
- X.v[1] ^= X.v[2];
- }
- if (Nrounds > 19) {
- X.v[0] += ks[0];
- X.v[1] += ks[1];
- X.v[2] += ks[2];
- X.v[3] += ks[3];
- X.v[4 - 1] += 5;
- }
- /* Maximum of 20 rounds */
- if (Nrounds > 20) {
- X.v[0] += X.v[1];
- X.v[1] = RotL_64(X.v[1], R_64x4_4_0);
- X.v[1] ^= X.v[0];
- X.v[2] += X.v[3];
- X.v[3] = RotL_64(X.v[3], R_64x4_4_1);
- X.v[3] ^= X.v[2];
- }
- return X;
-}
-enum r123_enum_threefry4x64 { threefry4x64_rounds = 20 };
-
-typedef struct s_threefry_state {
- threefry4x64_key_t *ctr;
- threefry4x64_ctr_t *key;
- int buffer_pos;
- uint64_t buffer[THREEFRY_BUFFER_SIZE];
- int has_uint32;
- uint32_t uinteger;
-} threefry_state;
-
-static NPY_INLINE uint64_t threefry_next(threefry_state *state) {
- int i;
- threefry4x64_ctr_t ct;
- uint64_t out;
- if (state->buffer_pos < THREEFRY_BUFFER_SIZE) {
- out = state->buffer[state->buffer_pos];
- state->buffer_pos++;
- return out;
- }
- /* generate 4 new uint64_t */
- state->ctr->v[0]++;
- /* Handle carry */
- if (state->ctr->v[0] == 0) {
- state->ctr->v[1]++;
- if (state->ctr->v[1] == 0) {
- state->ctr->v[2]++;
- if (state->ctr->v[2] == 0) {
- state->ctr->v[3]++;
- }
- }
- }
- ct = threefry4x64_R(threefry4x64_rounds, *state->ctr, *state->key);
- for (i = 0; i < 4; i++) {
- state->buffer[i] = ct.v[i];
- }
- state->buffer_pos = 1;
- return state->buffer[0];
-}
-
-static NPY_INLINE uint64_t threefry_next64(threefry_state *state) {
- return threefry_next(state);
-}
-
-static NPY_INLINE uint32_t threefry_next32(threefry_state *state) {
- uint64_t next;
- if (state->has_uint32) {
- state->has_uint32 = 0;
- return state->uinteger;
- }
- next = threefry_next(state);
-
- state->has_uint32 = 1;
- state->uinteger = (uint32_t)(next >> 32);
- return (uint32_t)(next & 0xffffffff);
-}
-
-extern void threefry_jump(threefry_state *state);
-
-extern void threefry_advance(uint64_t *step, threefry_state *state);
-
-#endif
diff --git a/numpy/random/tests/data/threefry-testset-1.csv b/numpy/random/tests/data/threefry-testset-1.csv
deleted file mode 100644
index ddfa736dc..000000000
--- a/numpy/random/tests/data/threefry-testset-1.csv
+++ /dev/null
@@ -1,1001 +0,0 @@
-seed, 0xdeadbeaf
-0, 0x8dfd999efc587d2e
-1, 0x3bf6c47ed872597f
-2, 0xd82537743662be19
-3, 0x46103c1408067361
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diff --git a/numpy/random/tests/data/threefry-testset-2.csv b/numpy/random/tests/data/threefry-testset-2.csv
deleted file mode 100644
index 275604557..000000000
--- a/numpy/random/tests/data/threefry-testset-2.csv
+++ /dev/null
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-796, 0x5c9f92b675b2f641
-797, 0xe6b34f7a1e196039
-798, 0xe1b77d497bef7516
-799, 0xc59d1b80b7b3b30b
-800, 0x819f5098375913b2
-801, 0xca0f73cffdaa9370
-802, 0x2f5bf935c691c5f4
-803, 0xecbd8bb256d09c58
-804, 0x43406aa69a99ecf4
-805, 0xf05f8b2ee179651d
-806, 0xb7c70142a0228f54
-807, 0xfc2db144bec4b245
-808, 0x2abce886e1a45ebc
-809, 0xaf58b72a59bca78e
-810, 0xa52b038f4d4541bf
-811, 0xc0d14bf583b241aa
-812, 0xc8a1abd7115cf8a7
-813, 0xe02e5a30a769d474
-814, 0x56acfdbd29796da9
-815, 0xe7387234b8b03889
-816, 0xf1227dd110b8f9c1
-817, 0x8b124ad0cb62d460
-818, 0x97b7c747f3b13887
-819, 0x216f43a8fc2314bf
-820, 0xaec316edaf92f3
-821, 0x10186bef157d36fe
-822, 0xf37a7ddce615aca1
-823, 0x9b5b913d16158f6c
-824, 0x59be9a31bf90f02a
-825, 0x24170e196a66a0a0
-826, 0x589a9527086fc354
-827, 0xc5990d0f438d434a
-828, 0x90eee29b52e7a094
-829, 0xb703a0dc266849dd
-830, 0x6d0bff0ad3ad2faa
-831, 0x91f7fc0cd9e78804
-832, 0xe86041baf693528d
-833, 0x1efabed627bb50a6
-834, 0xb59397e5f2895f58
-835, 0xd07f3b88397416dd
-836, 0x340f1719b497c11e
-837, 0x284e6cb714f9b6
-838, 0x185fc6ffc0b68229
-839, 0xfa2deec9e6c26b24
-840, 0x62c6578b4b262188
-841, 0xad4109b1cc118f48
-842, 0xa395d493b26d6f0e
-843, 0x325b4fe3d0dd4338
-844, 0xf91410de49c18d30
-845, 0xf07bf8b60923ce02
-846, 0x1423fe617d564876
-847, 0xc077f782126eb9cf
-848, 0x2fcb2f20910e89ae
-849, 0xc2bd451afd2e6816
-850, 0x77fb4184cb7d54b7
-851, 0x3f179aed62349343
-852, 0xd9186ae032d49425
-853, 0xb5eb57360137bdf8
-854, 0x3e4be92a340c6331
-855, 0x8429236eb3127098
-856, 0xdef72542e2b2b80
-857, 0x63a489df51948c4
-858, 0x8a7e00c797fde2b4
-859, 0xaf0ecdb100a40c24
-860, 0x5861013d27e2e75b
-861, 0x755b9daf64e225f3
-862, 0x3d2df8752fc1f0a5
-863, 0x603430c7044c9cc1
-864, 0x861421e1eacce08f
-865, 0x617e02ea4d46a34c
-866, 0xb5a65006a14421c6
-867, 0xb0f80b679b414c72
-868, 0x9906164388248865
-869, 0xc9c844ffa4051128
-870, 0xca9d7bf3530f5c33
-871, 0xab16e556b494c5ee
-872, 0x7221a1b8ef1aa54d
-873, 0xc271845c7d1a4e37
-874, 0x6a76797104475a2
-875, 0x908e423fb8735430
-876, 0xb5bb58134b1677c
-877, 0x9ffdd2ae9c3118c6
-878, 0x7e180fcd6840b8cc
-879, 0xf94537df07d2fdc4
-880, 0x5cc348554d45bb14
-881, 0x3d4daf3c2b6664b9
-882, 0xfd04db3f786791ad
-883, 0xc493d37c83bb96d2
-884, 0xbc9faef5435f86f1
-885, 0xbc65cb3d3f6e9d9e
-886, 0x9cbf2ffa56e6ecd1
-887, 0x9250836b7c20ad40
-888, 0x4f5c0071a0db9a4f
-889, 0xdc3f0522b1445aef
-890, 0x7506e5599b850a1f
-891, 0x81ed2abe0e2de08d
-892, 0x240490146352067a
-893, 0x3c77af13f5eea2cb
-894, 0xa7f4cdb8ff827eb4
-895, 0x1417242e31ad2476
-896, 0x76016b03999f9478
-897, 0xf94521fac0306668
-898, 0x8269175893be1d41
-899, 0xfc753632a234f285
-900, 0xf612755268cace8d
-901, 0xa14828c9024be019
-902, 0xfa70c71b9d1eaf55
-903, 0xdf1b71a62e31de5d
-904, 0x5501951e0e1edc8a
-905, 0x2f8f803b8df69cde
-906, 0x574f363439f7da1
-907, 0xfb10c35585727813
-908, 0x749b3c2837397d13
-909, 0xf3cdd1febe8cfdc7
-910, 0xe394963ee5056211
-911, 0x577d7d7b18de73af
-912, 0x47ab5d83b0c59c10
-913, 0x9dc8a3fadd1e6f9
-914, 0x83fe8257e75854d6
-915, 0x2e43cb3aa0046160
-916, 0x1dc475fcab4ac1dc
-917, 0xf0bc49e0566ce0ec
-918, 0xb603cdcf1f30fa6d
-919, 0x526760cc6bb6babe
-920, 0x7c1da274cfc404cc
-921, 0x1e7f5020e4872eb0
-922, 0x5810d9ce7b4eb5d8
-923, 0x5ddd35b6fdc8ccf1
-924, 0x3384120a60586e91
-925, 0xbea2bd919e0f3ce9
-926, 0x5a5e242545609467
-927, 0x4bde47bcf26eb4f6
-928, 0xb0a735deefec6c20
-929, 0x68a22c177454e398
-930, 0x8c9bdb2d15db7858
-931, 0xcf3748c5ce8663d9
-932, 0x4815c2a33d2e0b89
-933, 0x8ccabff1a06d51a8
-934, 0x9a5ac9d5cd9bde72
-935, 0x1dc5a9d71a51705e
-936, 0xbcdb2971a66f27a8
-937, 0x31b0cd0bd56e4640
-938, 0xf7efe6b1f1f5dabf
-939, 0xc5c99d9b4fb22013
-940, 0x1ba119bae4d4fba4
-941, 0xf65a6d9da77cc4bd
-942, 0x25cd9545d90e715b
-943, 0xb7477672a3531ea3
-944, 0xcf247ec31abeebc4
-945, 0x7e057e2450496fbd
-946, 0x38ef5e25d359c979
-947, 0x4c19225c27c2eace
-948, 0x2f0a528453e09547
-949, 0x59c8f78eba33f6bb
-950, 0xfc8e46c35ef2fd53
-951, 0xad32d2fb43958df0
-952, 0xa4925809889d9dec
-953, 0x91511a8ded719be9
-954, 0x8bafdd3b61b109d
-955, 0xedc9854399b02ea8
-956, 0xa50a9ba9d3f10ac3
-957, 0xbd94acf2d2a1833b
-958, 0xcdefa8e500cb91d6
-959, 0x95d64c722dd9ce9c
-960, 0x2593274b7561d701
-961, 0x9d5854a252f7d4ee
-962, 0xd799bae55a43bac4
-963, 0xd56a4f738e03f65
-964, 0x9c100f2599fe70cf
-965, 0x1fb9b7564fd6984a
-966, 0x16ca3ffcfbc77ab5
-967, 0x3a98bb3993bfe243
-968, 0x7fc4a69a94fc389e
-969, 0xf4adfc0494731b85
-970, 0xd691ed499cd189f2
-971, 0x7207391cf3664115
-972, 0xae2186bf1bb2773
-973, 0x5f10cea41eee2bd0
-974, 0x35f3303dba442fce
-975, 0x41f7580460af8f7d
-976, 0x6f92dcae967f8045
-977, 0xf8a23d127dfb64da
-978, 0xca2955a095bfa56d
-979, 0xf5f9a75318e0b668
-980, 0x94eabcf4d9fffbc1
-981, 0xfb5f2b3c85a44eb
-982, 0x1edb77bc0d4ceef1
-983, 0x98bbacdb3bbbfc39
-984, 0xeeb6d6bc48b6156e
-985, 0xc9c56b8f2fa29b0e
-986, 0x22f31ccb223886d0
-987, 0xbb7f3e16bc706aaa
-988, 0xe38c1e50cd965c52
-989, 0xb15aa0b68271c538
-990, 0x1c0dba1cfa587e61
-991, 0x70f267cd2d88e846
-992, 0xa439b7443ffebc10
-993, 0xd586c99b86177873
-994, 0xb05ff9807bdcb212
-995, 0xd7c08bd208fc8e05
-996, 0xd11063113d01ac5
-997, 0xd4c9beffc525f0b8
-998, 0x3d7303181643bc80
-999, 0xd75ef9b19286142
diff --git a/numpy/random/tests/test_direct.py b/numpy/random/tests/test_direct.py
index 051199217..c487c179a 100644
--- a/numpy/random/tests/test_direct.py
+++ b/numpy/random/tests/test_direct.py
@@ -6,7 +6,7 @@ from numpy.testing import (assert_equal, assert_allclose, assert_array_equal,
assert_raises)
import pytest
-from numpy.random import (Generator, MT19937, ThreeFry, PCG64,
+from numpy.random import (Generator, MT19937, PCG64,
Philox, Xoshiro256, Xoshiro512, RandomState)
from numpy.random.common import interface
@@ -341,29 +341,6 @@ class TestXoshiro512(Base):
cls.invalid_seed_values = [(-2,), (np.empty((2, 2), dtype=np.int64),)]
-class TestThreeFry(Base):
- @classmethod
- def setup_class(cls):
- cls.bit_generator = ThreeFry
- cls.bits = 64
- cls.dtype = np.uint64
- cls.data1 = cls._read_csv(
- join(pwd, './data/threefry-testset-1.csv'))
- cls.data2 = cls._read_csv(
- join(pwd, './data/threefry-testset-2.csv'))
- cls.seed_error_type = TypeError
- cls.invalid_seed_types = []
- cls.invalid_seed_values = [(1, None, 1), (-1,), (2 ** 257 + 1,),
- (None, None, 2 ** 257 + 1)]
-
- def test_set_key(self):
- bit_generator = self.bit_generator(*self.data1['seed'])
- state = bit_generator.state
- keyed = self.bit_generator(counter=state['state']['counter'],
- key=state['state']['key'])
- assert_state_equal(bit_generator.state, keyed.state)
-
-
class TestPhilox(Base):
@classmethod
def setup_class(cls):
diff --git a/numpy/random/tests/test_smoke.py b/numpy/random/tests/test_smoke.py
index d571e6548..7ab104294 100644
--- a/numpy/random/tests/test_smoke.py
+++ b/numpy/random/tests/test_smoke.py
@@ -5,7 +5,7 @@ from functools import partial
import numpy as np
import pytest
from numpy.testing import assert_equal, assert_, assert_array_equal
-from numpy.random import (Generator, MT19937, ThreeFry,
+from numpy.random import (Generator, MT19937,
PCG64, Philox, Xoshiro256, Xoshiro512,
entropy)
@@ -777,18 +777,6 @@ class TestPhilox(RNG):
cls._extra_setup()
-class TestThreeFry(RNG):
- @classmethod
- def setup_class(cls):
- cls.bit_generator = ThreeFry
- cls.advance = 2 ** 63 + 2 ** 31 + 2 ** 15 + 1
- cls.seed = [12345]
- cls.rg = Generator(cls.bit_generator(*cls.seed))
- cls.initial_state = cls.rg.bit_generator.state
- cls.seed_vector_bits = 64
- cls._extra_setup()
-
-
class TestXoshiro256(RNG):
@classmethod
def setup_class(cls):
diff --git a/numpy/random/threefry.pyx b/numpy/random/threefry.pyx
deleted file mode 100644
index eb98bc0af..000000000
--- a/numpy/random/threefry.pyx
+++ /dev/null
@@ -1,466 +0,0 @@
-from cpython.pycapsule cimport PyCapsule_New
-
-try:
- from threading import Lock
-except ImportError:
- from dummy_threading import Lock
-
-import numpy as np
-
-from .common cimport *
-from .distributions cimport bitgen_t
-from .entropy import random_entropy, seed_by_array
-
-__all__ = ['ThreeFry']
-
-np.import_array()
-
-DEF THREEFRY_BUFFER_SIZE=4
-
-cdef extern from 'src/threefry/threefry.h':
- struct s_r123array4x64:
- uint64_t v[4]
-
- ctypedef s_r123array4x64 r123array4x64
-
- ctypedef r123array4x64 threefry4x64_key_t
- ctypedef r123array4x64 threefry4x64_ctr_t
-
- struct s_threefry_state:
- threefry4x64_ctr_t *ctr
- threefry4x64_key_t *key
- int buffer_pos
- uint64_t buffer[THREEFRY_BUFFER_SIZE]
- int has_uint32
- uint32_t uinteger
-
- ctypedef s_threefry_state threefry_state
-
- uint64_t threefry_next64(threefry_state *state) nogil
- uint32_t threefry_next32(threefry_state *state) nogil
- void threefry_jump(threefry_state *state)
- void threefry_advance(uint64_t *step, threefry_state *state)
-
-
-cdef uint64_t threefry_uint64(void* st) nogil:
- return threefry_next64(<threefry_state *>st)
-
-cdef uint32_t threefry_uint32(void *st) nogil:
- return threefry_next32(<threefry_state *> st)
-
-cdef double threefry_double(void* st) nogil:
- return uint64_to_double(threefry_next64(<threefry_state *>st))
-
-cdef class ThreeFry:
- """
- ThreeFry(seed=None, counter=None, key=None)
-
- Container for the ThreeFry (4x64) pseudo-random number generator.
-
- Parameters
- ----------
- seed : {None, int, array_like}, optional
- Random seed initializing the pseudo-random number generator.
- Can be an integer in [0, 2**64-1], array of integers in
- [0, 2**64-1] or ``None`` (the default). If `seed` is ``None``,
- data will be read from ``/dev/urandom`` (or the Windows analog)
- if available. If unavailable, a hash of the time and process ID is
- used.
- counter : {None, int, array_like}, optional
- Counter to use in the ThreeFry state. Can be either
- a Python int in [0, 2**256) or a 4-element uint64 array.
- If not provided, the RNG is initialized at 0.
- key : {None, int, array_like}, optional
- Key to use in the ThreeFry state. Unlike seed, which is run through
- another RNG before use, the value in key is directly set. Can be either
- a Python int in [0, 2**256) or a 4-element uint64 array.
- key and seed cannot both be used.
-
- Attributes
- ----------
- lock: threading.Lock
- Lock instance that is shared so that the same bit git generator can
- be used in multiple Generators without corrupting the state. Code that
- generates values from a bit generator should hold the bit generator's
- lock.
-
- Notes
- -----
- ThreeFry is a 64-bit PRNG that uses a counter-based design based on
- weaker (and faster) versions of cryptographic functions [1]_. Instances
- using different values of the key produce independent sequences. ``ThreeFry``
- has a period of :math:`2^{256} - 1` and supports arbitrary advancing and
- jumping the sequence in increments of :math:`2^{128}`. These features allow
- multiple non-overlapping sequences to be generated.
-
- ``ThreeFry`` provides a capsule containing function pointers that produce
- doubles, and unsigned 32 and 64- bit integers. These are not
- directly consumable in Python and must be consumed by a ``Generator``
- or similar object that supports low-level access.
-
- See ``Philox`` for a closely related PRNG.
-
- **State and Seeding**
-
- The ``ThreeFry`` state vector consists of a 2 256-bit values encoded as
- 4-element uint64 arrays. One is a counter which is incremented by 1 for
- every 4 64-bit randoms produced. The second is a key which determined
- the sequence produced. Using different keys produces independent
- sequences.
-
- ``ThreeFry`` is seeded using either a single 64-bit unsigned integer
- or a vector of 64-bit unsigned integers. In either case, the seed is
- used as an input for a second random number generator,
- SplitMix64, and the output of this PRNG function is used as the initial state.
- Using a single 64-bit value for the seed can only initialize a small range of
- the possible initial state values.
-
- **Parallel Features**
-
- ``ThreeFry`` can be used in parallel applications by calling the ``jumped``
- method to advances the state as-if :math:`2^{128}` random numbers have
- been generated. Alternatively, ``advance`` can be used to advance the
- counter for any positive step in [0, 2**256). When using ``jumped``, all
- generators should be chained to ensure that the segments come from the same
- sequence.
-
- >>> from numpy.random import Generator, ThreeFry
- >>> bit_generator = ThreeFry(1234)
- >>> rg = []
- >>> for _ in range(10):
- ... rg.append(Generator(bit_generator))
- ... # Chain the BitGenerators
- ... bit_generator = bit_generator.jumped()
-
- Alternatively, ``ThreeFry`` can be used in parallel applications by using
- a sequence of distinct keys where each instance uses different key.
-
- >>> key = 2**196 + 2**132 + 2**65 + 2**33 + 2**17 + 2**9
- >>> rg = [Generator(ThreeFry(key=key+i)) for i in range(10)]
-
- **Compatibility Guarantee**
-
- ``ThreeFry`` makes a guarantee that a fixed seed and will always produce
- the same random integer stream.
-
- Examples
- --------
- >>> from numpy.random import Generator, ThreeFry
- >>> rg = Generator(ThreeFry(1234))
- >>> rg.standard_normal()
- 0.123 # random
-
- References
- ----------
- .. [1] John K. Salmon, Mark A. Moraes, Ron O. Dror, and David E. Shaw,
- "Parallel Random Numbers: As Easy as 1, 2, 3," Proceedings of
- the International Conference for High Performance Computing,
- Networking, Storage and Analysis (SC11), New York, NY: ACM, 2011.
- """
- cdef threefry_state rng_state
- cdef threefry4x64_ctr_t threefry_ctr
- cdef threefry4x64_key_t threefry_key
- cdef bitgen_t _bitgen
- cdef public object capsule
- cdef object _ctypes
- cdef object _cffi
- cdef public object lock
-
- def __init__(self, seed=None, counter=None, key=None):
- self.rng_state.ctr = &self.threefry_ctr
- self.rng_state.key = &self.threefry_key
- self.seed(seed, counter, key)
- self.lock = Lock()
-
- self._bitgen.state = <void *>&self.rng_state
- self._bitgen.next_uint64 = &threefry_uint64
- self._bitgen.next_uint32 = &threefry_uint32
- self._bitgen.next_double = &threefry_double
- self._bitgen.next_raw = &threefry_uint64
-
- self._ctypes = None
- self._cffi = None
-
- cdef const char *name = 'BitGenerator'
- self.capsule = PyCapsule_New(<void *>&self._bitgen, name, NULL)
-
- # Pickling support:
- def __getstate__(self):
- return self.state
-
- def __setstate__(self, state):
- self.state = state
-
- def __reduce__(self):
- from ._pickle import __bit_generator_ctor
- return __bit_generator_ctor, (self.state['bit_generator'],), self.state
-
- cdef _reset_state_variables(self):
- self.rng_state.has_uint32 = 0
- self.rng_state.uinteger = 0
- self.rng_state.buffer_pos = THREEFRY_BUFFER_SIZE
- for i in range(THREEFRY_BUFFER_SIZE):
- self.rng_state.buffer[i] = 0
-
- def random_raw(self, size=None, output=True):
- """
- random_raw(self, size=None)
-
- Return randoms as generated by the underlying BitGenerator
-
- Parameters
- ----------
- size : int or tuple of ints, optional
- Output shape. If the given shape is, e.g., ``(m, n, k)``, then
- ``m * n * k`` samples are drawn. Default is None, in which case a
- single value is returned.
- output : bool, optional
- Output values. Used for performance testing since the generated
- values are not returned.
-
- Returns
- -------
- out : uint or ndarray
- Drawn samples.
-
- Notes
- -----
- This method directly exposes the the raw underlying pseudo-random
- number generator. All values are returned as unsigned 64-bit
- values irrespective of the number of bits produced by the PRNG.
-
- See the class docstring for the number of bits returned.
- """
- return random_raw(&self._bitgen, self.lock, size, output)
-
- def _benchmark(self, Py_ssize_t cnt, method=u'uint64'):
- return benchmark(&self._bitgen, self.lock, cnt, method)
-
- def seed(self, seed=None, counter=None, key=None):
- """
- seed(seed=None, counter=None, key=None)
-
- Seed the generator.
-
- This method is called when ``ThreeFry`` is initialized. It can be
- called again to re-seed the generator. For details, see
- ``ThreeFry``.
-
- Parameters
- ----------
- seed : int, optional
- Seed for ``ThreeFry``.
- counter : {None, int array}, optional
- Positive integer less than 2**256 containing the counter position
- or a 4 element array of uint64 containing the counter
- key : {None, int, array}, optional
- Positive integer less than 2**256 containing the key
- or a 4 element array of uint64 containing the key. key and
- seed cannot be simultaneously used.
-
- Raises
- ------
- ValueError
- If values are out of range for the PRNG.
-
- Notes
- -----
- The two representation of the counter and key are related through
- array[i] = (value // 2**(64*i)) % 2**64.
- """
- if seed is not None and key is not None:
- raise ValueError('seed and key cannot be both used')
- if key is None:
- if seed is None:
- try:
- state = random_entropy(8)
- except RuntimeError:
- state = random_entropy(8, 'fallback')
- state = state.view(np.uint64)
- else:
- state = seed_by_array(seed, 4)
- for i in range(4):
- self.rng_state.key.v[i] = state[i]
- else:
- key = int_to_array(key, 'key', 256, 64)
- for i in range(4):
- self.rng_state.key.v[i] = key[i]
-
- counter = 0 if counter is None else counter
- counter = int_to_array(counter, 'counter', 256, 64)
- for i in range(4):
- self.rng_state.ctr.v[i] = counter[i]
-
- self._reset_state_variables()
-
- @property
- def state(self):
- """
- Get or set the PRNG state
-
- Returns
- -------
- state : dict
- Dictionary containing the information required to describe the
- state of the PRNG
- """
- ctr = np.empty(4, dtype=np.uint64)
- key = np.empty(4, dtype=np.uint64)
- buffer = np.empty(THREEFRY_BUFFER_SIZE, dtype=np.uint64)
- for i in range(4):
- ctr[i] = self.rng_state.ctr.v[i]
- key[i] = self.rng_state.key.v[i]
- for i in range(THREEFRY_BUFFER_SIZE):
- buffer[i] = self.rng_state.buffer[i]
- state = {'counter': ctr, 'key': key}
- return {'bit_generator': self.__class__.__name__,
- 'state': state,
- 'buffer': buffer,
- 'buffer_pos': self.rng_state.buffer_pos,
- 'has_uint32': self.rng_state.has_uint32,
- 'uinteger': self.rng_state.uinteger}
-
- @state.setter
- def state(self, value):
- if not isinstance(value, dict):
- raise TypeError('state must be a dict')
- bitgen = value.get('bit_generator', '')
- if bitgen != self.__class__.__name__:
- raise ValueError('state must be for a {0} '
- 'PRNG'.format(self.__class__.__name__))
- for i in range(4):
- self.rng_state.ctr.v[i] = <uint64_t>value['state']['counter'][i]
- self.rng_state.key.v[i] = <uint64_t>value['state']['key'][i]
- for i in range(THREEFRY_BUFFER_SIZE):
- self.rng_state.buffer[i] = <uint64_t>value['buffer'][i]
- self.rng_state.has_uint32 = value['has_uint32']
- self.rng_state.uinteger = value['uinteger']
- self.rng_state.buffer_pos = value['buffer_pos']
-
- cdef jump_inplace(self, iter):
- """
- Jump state in-place
-
- Not part of public API
-
- Parameters
- ----------
- iter : integer, positive
- Number of times to jump the state of the rng.
- """
- self.advance(iter * int(2**128))
-
- def jumped(self, jumps=1):
- """
- jumped(jumps=1)
-
- Returns a new bit generator with the state jumped
-
- The state of the returned big generator is jumped as-if
- 2**(128 * jumps) random numbers have been generated.
-
- Parameters
- ----------
- iter : integer, positive
- Number of times to jump the state of the bit generator returned
-
- Returns
- -------
- bit_generator : ThreeFry
- New instance of generator jumped iter times
- """
- cdef ThreeFry bit_generator
-
- bit_generator = self.__class__()
- bit_generator.state = self.state
- bit_generator.jump_inplace(jumps)
-
- return bit_generator
-
- def advance(self, delta):
- """
- advance(delta)
-
- Advance the underlying RNG as-if delta draws have occurred.
-
- Parameters
- ----------
- delta : integer, positive
- Number of draws to advance the RNG. Must be less than the
- size state variable in the underlying RNG.
-
- Returns
- -------
- self : ThreeFry
- RNG advanced delta steps
-
- Notes
- -----
- Advancing a RNG updates the underlying RNG state as-if a given
- number of calls to the underlying RNG have been made. In general
- there is not a one-to-one relationship between the number output
- random values from a particular distribution and the number of
- draws from the core RNG. This occurs for two reasons:
-
- * The random values are simulated using a rejection-based method
- and so, on average, more than one value from the underlying
- RNG is required to generate an single draw.
- * The number of bits required to generate a simulated value
- differs from the number of bits generated by the underlying
- RNG. For example, two 16-bit integer values can be simulated
- from a single draw of a 32-bit RNG.
-
- Advancing the RNG state resets any pre-computed random numbers.
- This is required to ensure exact reproducibility.
- """
- delta = wrap_int(delta, 256)
-
- cdef np.ndarray delta_a
- delta_a = int_to_array(delta, 'step', 256, 64)
- threefry_advance(<uint64_t *>delta_a.data, &self.rng_state)
- self._reset_state_variables()
- return self
-
- @property
- def ctypes(self):
- """
- ctypes interface
-
- Returns
- -------
- interface : namedtuple
- Named tuple containing ctypes wrapper
-
- * state_address - Memory address of the state struct
- * state - pointer to the state struct
- * next_uint64 - function pointer to produce 64 bit integers
- * next_uint32 - function pointer to produce 32 bit integers
- * next_double - function pointer to produce doubles
- * bitgen - pointer to the BitGenerator struct
- """
- if self._ctypes is None:
- self._ctypes = prepare_ctypes(&self._bitgen)
-
- return self._ctypes
-
- @property
- def cffi(self):
- """
- CFFI interface
-
- Returns
- -------
- interface : namedtuple
- Named tuple containing CFFI wrapper
-
- * state_address - Memory address of the state struct
- * state - pointer to the state struct
- * next_uint64 - function pointer to produce 64 bit integers
- * next_uint32 - function pointer to produce 32 bit integers
- * next_double - function pointer to produce doubles
- * bitgen - pointer to the BitGenerator struct
- """
- if self._cffi is not None:
- return self._cffi
- self._cffi = prepare_cffi(&self._bitgen)
- return self._cffi
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