authorgravatar for matthew.h.borkowski@gmail.comMatthew Borkowski <matthew.h.borkowski@gmail.com> 2021-03-28 21:46:59-04:00
committergravatar for mail@isaacfreund.comIsaac Freund <mail@isaacfreund.com> 2021-03-29 09:22:06+02:00
log501b4aff9968e691283dd6ce637b503a12b03d38
tree63eef0d033d39182a0f756a69e9791f618141dad
parenta5cc5f7854b87f3daaff790deb6dec72b329f432

Add tests for the fill functions of the Isaac64, Pcg, Sfc64, and Xoroshiro128 PRNGs

4 files changed, 111 insertions(+), 0 deletions(-)

lib/std/rand/Isaac64.zig+32
...@@ -208,3 +208,35 @@ test "isaac64 sequence" {...@@ -208,3 +208,35 @@ test "isaac64 sequence" {
208 std.testing.expect(s == r.next());208 std.testing.expect(s == r.next());
209 }209 }
210}210}
211
212test "isaac64 fill" {
213 var r = Isaac64.init(0);
214
215 // from reference implementation
216 const seq = [_]u64{
217 0xf67dfba498e4937c,
218 0x84a5066a9204f380,
219 0xfee34bd5f5514dbb,
220 0x4d1664739b8f80d6,
221 0x8607459ab52a14aa,
222 0x0e78bc5a98529e49,
223 0xfe5332822ad13777,
224 0x556c27525e33d01a,
225 0x08643ca615f3149f,
226 0xd0771faf3cb04714,
227 0x30e86f68a37b008d,
228 0x3074ebc0488a3adf,
229 0x270645ea7a2790bc,
230 0x5601a0a8d3763c6a,
231 0x2f83071f53f325dd,
232 0xb9090f3d42d2d2ea,
233 };
234
235 for (seq) |s| {
236 var buf0: [8]u8 = undefined;
237 var buf1: [7]u8 = undefined;
238 std.mem.writeIntLittle(u64, &buf0, s);
239 Isaac64.fill(&r.random, &buf1);
240 std.testing.expect(std.mem.eql(u8, buf0[0..7], buf1[0..]));
241 }
242}
lib/std/rand/Pcg.zig+24
...@@ -99,3 +99,27 @@ test "pcg sequence" {...@@ -99,3 +99,27 @@ test "pcg sequence" {
99 std.testing.expect(s == r.next());99 std.testing.expect(s == r.next());
100 }100 }
101}101}
102
103test "pcg fill" {
104 var r = Pcg.init(0);
105 const s0: u64 = 0x9394bf54ce5d79de;
106 const s1: u64 = 0x84e9c579ef59bbf7;
107 r.seedTwo(s0, s1);
108
109 const seq = [_]u32{
110 2881561918,
111 3063928540,
112 1199791034,
113 2487695858,
114 1479648952,
115 3247963454,
116 };
117
118 for (seq) |s| {
119 var buf0: [4]u8 = undefined;
120 var buf1: [3]u8 = undefined;
121 std.mem.writeIntLittle(u32, &buf0, s);
122 Pcg.fill(&r.random, &buf1);
123 std.testing.expect(std.mem.eql(u8, buf0[0..3], buf1[0..]));
124 }
125}
lib/std/rand/Sfc64.zig+32
...@@ -106,3 +106,35 @@ test "Sfc64 sequence" {...@@ -106,3 +106,35 @@ test "Sfc64 sequence" {
106 std.testing.expectEqual(s, r.next());106 std.testing.expectEqual(s, r.next());
107 }107 }
108}108}
109
110test "Sfc64 fill" {
111 // Unfortunately there does not seem to be an official test sequence.
112 var r = Sfc64.init(0);
113
114 const seq = [_]u64{
115 0x3acfa029e3cc6041,
116 0xf5b6515bf2ee419c,
117 0x1259635894a29b61,
118 0xb6ae75395f8ebd6,
119 0x225622285ce302e2,
120 0x520d28611395cb21,
121 0xdb909c818901599d,
122 0x8ffd195365216f57,
123 0xe8c4ad5e258ac04a,
124 0x8f8ef2c89fdb63ca,
125 0xf9865b01d98d8e2f,
126 0x46555871a65d08ba,
127 0x66868677c6298fcd,
128 0x2ce15a7e6329f57d,
129 0xb2f1833ca91ca79,
130 0x4b0890ac9bf453ca,
131 };
132
133 for (seq) |s| {
134 var buf0: [8]u8 = undefined;
135 var buf1: [7]u8 = undefined;
136 std.mem.writeIntLittle(u64, &buf0, s);
137 Sfc64.fill(&r.random, &buf1);
138 std.testing.expect(std.mem.eql(u8, buf0[0..7], buf1[0..]));
139 }
140}
lib/std/rand/Xoroshiro128.zig+23
...@@ -131,3 +131,26 @@ test "xoroshiro sequence" {...@@ -131,3 +131,26 @@ test "xoroshiro sequence" {
131 std.testing.expect(s == r.next());131 std.testing.expect(s == r.next());
132 }132 }
133}133}
134
135test "xoroshiro fill" {
136 var r = Xoroshiro128.init(0);
137 r.s[0] = 0xaeecf86f7878dd75;
138 r.s[1] = 0x01cd153642e72622;
139
140 const seq = [_]u64{
141 0xb0ba0da5bb600397,
142 0x18a08afde614dccc,
143 0xa2635b956a31b929,
144 0xabe633c971efa045,
145 0x9ac19f9706ca3cac,
146 0xf62b426578c1e3fb,
147 };
148
149 for (seq) |s| {
150 var buf0: [8]u8 = undefined;
151 var buf1: [7]u8 = undefined;
152 std.mem.writeIntLittle(u64, &buf0, s);
153 Xoroshiro128.fill(&r.random, &buf1);
154 std.testing.expect(std.mem.eql(u8, buf0[0..7], buf1[0..]));
155 }
156}