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1/**
2 * @license
3 * Copyright 2020 Google LLC. All Rights Reserved.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 * =============================================================================
16 */
17import * as tf from '../index';
18import { ALL_ENVS, describeWithFlags } from '../jasmine_util';
19import { expectArraysClose } from '../test_util';
20describeWithFlags('slice2d', ALL_ENVS, () => {
21 it('slicing a 1x1 from a 1x1 returns a 1x1', () => {
22 const a = tf.tensor2d([0], [1, 1]);
23 const b = tf.slice2d(a, [0, 0], [1, 1]);
24 expect(b.shape).toEqual([1, 1]);
25 });
26 it('returns a tensor of slice size', () => {
27 const a = tf.zeros([100, 100]);
28 const b = tf.slice2d(a, [0, 0], [12, 34]);
29 expect(b.shape).toEqual([12, 34]);
30 });
31 it('returns the upper-left submatrix when begin is [0, 0]', async () => {
32 const a = tf.randomUniform([10, 10], -1, 1);
33 const b = tf.slice2d(a, [0, 0], [2, 2]);
34 const aValues = await a.data();
35 expectArraysClose(await b.data(), [aValues[0], aValues[1], aValues[10], aValues[11]]);
36 });
37 it('returns the rectangle specified', async () => {
38 const a = tf.tensor2d([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], [4, 3]);
39 const b = tf.slice2d(a, [1, 1], [3, 2]);
40 expectArraysClose(await b.data(), [5, 6, 8, 9, 11, 12]);
41 });
42 it('throws when requesting out of bounds slice', () => {
43 const a = tf.tensor2d([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], [4, 3]);
44 expect(() => tf.slice2d(a, [1, 1], [10, 10])).toThrowError();
45 });
46 it('grad', async () => {
47 const a = tf.tensor2d([[1, 2, 3], [4, 5, 6]]);
48 const dy = tf.tensor2d([[20], [50]]);
49 const da = tf.grad((x) => tf.slice2d(a, [0, 1], [2, 1]))(a, dy);
50 expect(da.shape).toEqual([2, 3]);
51 expectArraysClose(await da.data(), [0, 20, 0, 0, 50, 0]);
52 });
53 it('accepts a tensor-like object', () => {
54 const a = [[0]]; // 1x1
55 const b = tf.slice2d(a, [0, 0], [1, 1]);
56 expect(b.shape).toEqual([1, 1]);
57 });
58 it('slice an already sliced tensor, first was not continous', async () => {
59 const a = [
60 [1, 2, 3, 4],
61 [5, 6, 7, 8],
62 [9, 10, 11, 12],
63 ]; // 3x4.
64 const b = tf.slice(a, [0, 1]);
65 const c = tf.slice(b, [1, 1], [1, 1]);
66 expect(c.shape).toEqual([1, 1]);
67 expectArraysClose(await c.data(), [7]);
68 });
69 it('slice an already sliced tensor, first was continous', async () => {
70 const a = [
71 [1, 2, 3, 4],
72 [5, 6, 7, 8],
73 [9, 10, 11, 12],
74 ]; // 3x4.
75 const b = tf.slice(a, [1, 0]);
76 const c = tf.slice(b, [1, 0]);
77 expect(c.shape).toEqual([1, 4]);
78 expectArraysClose(await c.data(), [9, 10, 11, 12]);
79 });
80 it('slice an already sliced tensor and do async read', async () => {
81 const a = [
82 [1, 2, 3, 4],
83 [5, 6, 7, 8],
84 [9, 10, 11, 12],
85 ]; // 3x4.
86 const b = tf.slice(a, [0, 1]);
87 const c = tf.slice(b, [1, 1], [1, 1]);
88 expect(c.shape).toEqual([1, 1]);
89 expectArraysClose(await c.data(), new Float32Array([7]));
90 });
91 it('square a sliced texture, followed by non-sliced texture of same shape', async () => {
92 // Make a 2x3 tensor, upload to gpu and reshape to 3x2.
93 const input = tf.tensor([[1, 2, 3], [4, 5, 6]]).abs().as2D(3, 2);
94 const slicedInput = tf.slice(input, [0, 0], [3, 2]);
95 // First square program takes the sliced input.
96 const a = slicedInput.square();
97 expectArraysClose(await a.data(), [1, 4, 9, 16, 25, 36]);
98 // Second square program takes the non-sliced input.
99 const b = tf.square(input);
100 expectArraysClose(await b.data(), [1, 4, 9, 16, 25, 36]);
101 });
102 it('square a non-sliced texture, followed by a sliced texture of same shape', async () => {
103 // Make a 2x3 tensor, upload to gpu and reshape to 3x2.
104 const input = tf.tensor([[1, 2, 3], [4, 5, 6]]).abs().as2D(3, 2);
105 // Make a sliced version of the same tensor with the same shape.
106 const slicedInput = tf.slice(input, [0, 0], [3, 2]);
107 // First square program takes the non-sliced input.
108 const a = input.square();
109 expectArraysClose(await a.data(), [1, 4, 9, 16, 25, 36]);
110 // Second square program takes the sliced input.
111 const b = tf.square(slicedInput);
112 expectArraysClose(await b.data(), [1, 4, 9, 16, 25, 36]);
113 });
114 it('slice a tensor and do async read', async () => {
115 const a = [
116 [1, 2, 3, 4],
117 [5, 6, 7, 8],
118 [9, 10, 11, 12],
119 ]; // 3x4.
120 const b = tf.slice(a, [0, 1], [3, 2]);
121 expect(b.shape).toEqual([3, 2]);
122 const vals = await b.data();
123 expectArraysClose(vals, new Float32Array([2, 3, 6, 7, 10, 11]));
124 });
125 it('flatten a sliced tensor that was continuous in memory', async () => {
126 const a = [
127 [1, 2, 3, 4],
128 [5, 6, 7, 8],
129 [9, 10, 11, 12],
130 ]; // 3x4.
131 const b = tf.slice(a, [1, 0]).flatten();
132 expect(b.shape).toEqual([8]);
133 expectArraysClose(await b.data(), [5, 6, 7, 8, 9, 10, 11, 12]);
134 });
135 it('slice a tensor that was not continuous in memory', async () => {
136 const a = [
137 [1, 2, 3, 4],
138 [5, 6, 7, 8],
139 [9, 10, 11, 12],
140 ]; // 3x4.
141 const b = tf.slice(a, [0, 1]);
142 expect(b.shape).toEqual([3, 3]);
143 expectArraysClose(await b.data(), [2, 3, 4, 6, 7, 8, 10, 11, 12]);
144 });
145 it('flatten a sliced tensor that was not continuous in memory', async () => {
146 const a = [
147 [1, 2, 3, 4],
148 [5, 6, 7, 8],
149 [9, 10, 11, 12],
150 ]; // 3x4.
151 const b = tf.slice(a, [0, 1]).flatten();
152 expect(b.shape).toEqual([9]);
153 expectArraysClose(await b.data(), [2, 3, 4, 6, 7, 8, 10, 11, 12]);
154 });
155 it('flatten a sliced tensor not continuous in memory and run program', async () => {
156 const a = [
157 [1, 2, 3, 4],
158 [5, 6, 7, 8],
159 [9, 10, 11, 12],
160 ]; // 3x4.
161 const b = tf.slice(a, [0, 1]).flatten();
162 const c = tf.square(b);
163 expectArraysClose(await c.data(), [4, 9, 16, 36, 49, 64, 100, 121, 144]);
164 });
165 it('reshape a sliced 1d into a 2d tensor', async () => {
166 const a = [1, 2, 3, 4, 5];
167 const b = tf.slice(a, 1).as2D(2, 2);
168 expect(b.shape).toEqual([2, 2]);
169 expectArraysClose(await b.data(), [2, 3, 4, 5]);
170 });
171 it('reshape a sliced 1d into a 2d tensor and run program', async () => {
172 const a = [1, 2, 3, 4, 5];
173 const b = tf.slice(a, 1).as2D(2, 2).square();
174 expect(b.shape).toEqual([2, 2]);
175 expectArraysClose(await b.data(), [4, 9, 16, 25]);
176 });
177 it('broadcast the original with the sliced tensor', async () => {
178 const a = [[1, 2], [3, 4]];
179 const b = tf.slice(a, [0, 1]);
180 const c = tf.add(a, b);
181 expect(c.shape).toEqual([2, 2]);
182 expectArraysClose(await c.data(), [3, 4, 7, 8]);
183 });
184 it('zero-sized slice out of a non-zero sized tensor', async () => {
185 const a = tf.zeros([4, 2]);
186 const res = tf.slice(a, [0, 0], [0, 2]);
187 expect(res.shape).toEqual([0, 2]);
188 expectArraysClose(await res.data(), []);
189 });
190 it('zero-sized slice out of a zero-sized tensor', async () => {
191 const a = tf.zeros([0, 4]);
192 const res = tf.slice(a, [0, 1], [0, 3]);
193 expect(res.shape).toEqual([0, 3]);
194 expectArraysClose(await res.data(), []);
195 });
196});
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* @license\n * Copyright 2020 Google LLC. All Rights Reserved.\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n * =============================================================================\n */\n\nimport * as tf from '../index';\nimport {ALL_ENVS, describeWithFlags} from '../jasmine_util';\nimport {expectArraysClose} from '../test_util';\nimport {Rank} from '../types';\n\ndescribeWithFlags('slice2d', ALL_ENVS, () => {\n  it('slicing a 1x1 from a 1x1 returns a 1x1', () => {\n    const a = tf.tensor2d([0], [1, 1]);\n    const b = tf.slice2d(a, [0, 0], [1, 1]);\n    expect(b.shape).toEqual([1, 1]);\n  });\n\n  it('returns a tensor of slice size', () => {\n    const a = tf.zeros<Rank.R2>([100, 100]);\n    const b = tf.slice2d(a, [0, 0], [12, 34]);\n    expect(b.shape).toEqual([12, 34]);\n  });\n\n  it('returns the upper-left submatrix when begin is [0, 0]', async () => {\n    const a = tf.randomUniform<Rank.R2>([10, 10], -1, 1);\n    const b = tf.slice2d(a, [0, 0], [2, 2]);\n    const aValues = await a.data();\n\n    expectArraysClose(\n        await b.data(), [aValues[0], aValues[1], aValues[10], aValues[11]]);\n  });\n\n  it('returns the rectangle specified', async () => {\n    const a = tf.tensor2d([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], [4, 3]);\n    const b = tf.slice2d(a, [1, 1], [3, 2]);\n\n    expectArraysClose(await b.data(), [5, 6, 8, 9, 11, 12]);\n  });\n\n  it('throws when requesting out of bounds slice', () => {\n    const a = tf.tensor2d([1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12], [4, 3]);\n    expect(() => tf.slice2d(a, [1, 1], [10, 10])).toThrowError();\n  });\n\n  it('grad', async () => {\n    const a = tf.tensor2d([[1, 2, 3], [4, 5, 6]]);\n    const dy = tf.tensor2d([[20], [50]]);\n    const da =\n        tf.grad((x: tf.Tensor2D) => tf.slice2d(a, [0, 1], [2, 1]))(a, dy);\n    expect(da.shape).toEqual([2, 3]);\n    expectArraysClose(await da.data(), [0, 20, 0, 0, 50, 0]);\n  });\n\n  it('accepts a tensor-like object', () => {\n    const a = [[0]];  // 1x1\n    const b = tf.slice2d(a, [0, 0], [1, 1]);\n    expect(b.shape).toEqual([1, 1]);\n  });\n\n  it('slice an already sliced tensor, first was not continous', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [0, 1]);\n    const c = tf.slice(b, [1, 1], [1, 1]);\n    expect(c.shape).toEqual([1, 1]);\n    expectArraysClose(await c.data(), [7]);\n  });\n\n  it('slice an already sliced tensor, first was continous', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [1, 0]);\n    const c = tf.slice(b, [1, 0]);\n    expect(c.shape).toEqual([1, 4]);\n    expectArraysClose(await c.data(), [9, 10, 11, 12]);\n  });\n\n  it('slice an already sliced tensor and do async read', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [0, 1]);\n    const c = tf.slice(b, [1, 1], [1, 1]);\n    expect(c.shape).toEqual([1, 1]);\n    expectArraysClose(await c.data(), new Float32Array([7]));\n  });\n\n  it('square a sliced texture, followed by non-sliced texture of same shape',\n     async () => {  // Tests collisions in the shader cache.\n       // Make a 2x3 tensor, upload to gpu and reshape to 3x2.\n       const input = tf.tensor([[1, 2, 3], [4, 5, 6]]).abs().as2D(3, 2);\n       const slicedInput = tf.slice(input, [0, 0], [3, 2]);\n       // First square program takes the sliced input.\n       const a = slicedInput.square();\n       expectArraysClose(await a.data(), [1, 4, 9, 16, 25, 36]);\n       // Second square program takes the non-sliced input.\n       const b = tf.square(input);\n       expectArraysClose(await b.data(), [1, 4, 9, 16, 25, 36]);\n     });\n\n  it('square a non-sliced texture, followed by a sliced texture of same shape',\n     async () => {  // Tests collisions in the shader cache.\n       // Make a 2x3 tensor, upload to gpu and reshape to 3x2.\n       const input = tf.tensor([[1, 2, 3], [4, 5, 6]]).abs().as2D(3, 2);\n       // Make a sliced version of the same tensor with the same shape.\n       const slicedInput = tf.slice(input, [0, 0], [3, 2]);\n       // First square program takes the non-sliced input.\n       const a = input.square();\n       expectArraysClose(await a.data(), [1, 4, 9, 16, 25, 36]);\n       // Second square program takes the sliced input.\n       const b = tf.square(slicedInput);\n       expectArraysClose(await b.data(), [1, 4, 9, 16, 25, 36]);\n     });\n\n  it('slice a tensor and do async read', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [0, 1], [3, 2]);\n    expect(b.shape).toEqual([3, 2]);\n    const vals = await b.data();\n    expectArraysClose(vals, new Float32Array([2, 3, 6, 7, 10, 11]));\n  });\n\n  it('flatten a sliced tensor that was continuous in memory', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [1, 0]).flatten();\n    expect(b.shape).toEqual([8]);\n    expectArraysClose(await b.data(), [5, 6, 7, 8, 9, 10, 11, 12]);\n  });\n\n  it('slice a tensor that was not continuous in memory', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [0, 1]);\n    expect(b.shape).toEqual([3, 3]);\n    expectArraysClose(await b.data(), [2, 3, 4, 6, 7, 8, 10, 11, 12]);\n  });\n\n  it('flatten a sliced tensor that was not continuous in memory', async () => {\n    const a = [\n      [1, 2, 3, 4],\n      [5, 6, 7, 8],\n      [9, 10, 11, 12],\n    ];  // 3x4.\n    const b = tf.slice(a, [0, 1]).flatten();\n    expect(b.shape).toEqual([9]);\n    expectArraysClose(await b.data(), [2, 3, 4, 6, 7, 8, 10, 11, 12]);\n  });\n\n  it('flatten a sliced tensor not continuous in memory and run program',\n     async () => {\n       const a = [\n         [1, 2, 3, 4],\n         [5, 6, 7, 8],\n         [9, 10, 11, 12],\n       ];  // 3x4.\n       const b = tf.slice(a, [0, 1]).flatten();\n       const c = tf.square(b);\n       expectArraysClose(await c.data(), [4, 9, 16, 36, 49, 64, 100, 121, 144]);\n     });\n\n  it('reshape a sliced 1d into a 2d tensor', async () => {\n    const a = [1, 2, 3, 4, 5];\n    const b = tf.slice(a, 1).as2D(2, 2);\n    expect(b.shape).toEqual([2, 2]);\n    expectArraysClose(await b.data(), [2, 3, 4, 5]);\n  });\n\n  it('reshape a sliced 1d into a 2d tensor and run program', async () => {\n    const a = [1, 2, 3, 4, 5];\n    const b = tf.slice(a, 1).as2D(2, 2).square();\n    expect(b.shape).toEqual([2, 2]);\n    expectArraysClose(await b.data(), [4, 9, 16, 25]);\n  });\n\n  it('broadcast the original with the sliced tensor', async () => {\n    const a = [[1, 2], [3, 4]];\n    const b = tf.slice(a, [0, 1]);\n    const c = tf.add(a, b);\n    expect(c.shape).toEqual([2, 2]);\n    expectArraysClose(await c.data(), [3, 4, 7, 8]);\n  });\n\n  it('zero-sized slice out of a non-zero sized tensor', async () => {\n    const a = tf.zeros([4, 2]);\n    const res = tf.slice(a, [0, 0], [0, 2]);\n    expect(res.shape).toEqual([0, 2]);\n    expectArraysClose(await res.data(), []);\n  });\n\n  it('zero-sized slice out of a zero-sized tensor', async () => {\n    const a = tf.zeros([0, 4]);\n    const res = tf.slice(a, [0, 1], [0, 3]);\n    expect(res.shape).toEqual([0, 3]);\n    expectArraysClose(await res.data(), []);\n  });\n});\n"]}
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