122 lines
4.8 KiB
C++
122 lines
4.8 KiB
C++
//*****************************************************************************
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// Copyright 2017-2020 Intel Corporation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//*****************************************************************************
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#include <climits>
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#include <random>
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#include "gtest/gtest.h"
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#include "ngraph/runtime/aligned_buffer.hpp"
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#include "ngraph/type/float16.hpp"
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#include "util/float_util.hpp"
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using namespace std;
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using namespace ngraph;
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TEST(float16, conversions)
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{
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float16 f16;
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const char* source_string;
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std::string f16_string;
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// 1.f
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source_string = "0 01111 00 0000 0000";
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f16 = test::bits_to_float16(source_string);
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EXPECT_EQ(f16, float16(1.0));
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f16_string = test::float16_to_bits(f16);
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EXPECT_STREQ(source_string, f16_string.c_str());
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EXPECT_EQ(static_cast<float>(f16), 1.0);
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// -1.f
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source_string = "1 01111 00 0000 0000";
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f16 = test::bits_to_float16(source_string);
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EXPECT_EQ(f16, float16(-1.0));
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f16_string = test::float16_to_bits(f16);
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EXPECT_STREQ(source_string, f16_string.c_str());
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EXPECT_EQ(static_cast<float>(f16), -1.0);
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// 0.f
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source_string = "0 00000 00 0000 0000";
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f16 = test::bits_to_float16(source_string);
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EXPECT_EQ(f16, float16(0.0));
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f16_string = test::float16_to_bits(f16);
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EXPECT_STREQ(source_string, f16_string.c_str());
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EXPECT_EQ(static_cast<float>(f16), 0.0);
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// 1.5f
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source_string = "0 01111 10 0000 0000";
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f16 = test::bits_to_float16(source_string);
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EXPECT_EQ(f16, float16(1.5));
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f16_string = test::float16_to_bits(f16);
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EXPECT_STREQ(source_string, f16_string.c_str());
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EXPECT_EQ(static_cast<float>(f16), 1.5);
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}
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TEST(float16, assigns)
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{
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float16 f16;
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f16 = 2.0;
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EXPECT_EQ(f16, float16(2.0));
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std::vector<float> f32vec{1.0, 2.0, 4.0};
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std::vector<float16> f16vec;
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std::copy(f32vec.begin(), f32vec.end(), std::back_inserter(f16vec));
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for (size_t i = 0; i < f32vec.size(); ++i)
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{
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EXPECT_EQ(f32vec.at(i), f16vec.at(i));
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}
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float f32arr[] = {1.0, 2.0, 4.0};
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float16 f16arr[sizeof(f32arr)];
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for (size_t i = 0; i < sizeof(f32arr) / sizeof(f32arr[0]); ++i)
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{
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f16arr[i] = f32arr[i];
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EXPECT_EQ(f32arr[i], f16arr[i]);
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}
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}
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TEST(float16, values)
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{
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EXPECT_EQ(static_cast<float16>(test::FloatUnion(0, 112 - 8, (1 << 21) + 0).f).to_bits(),
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float16(0, 0, 2).to_bits());
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EXPECT_EQ(static_cast<float16>(test::FloatUnion(0, 112 - 8, (1 << 21) + 1).f).to_bits(),
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float16(0, 0, 3).to_bits());
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EXPECT_EQ(static_cast<float16>(1.0 / (256.0 * 65536.0)).to_bits(), float16(0, 0, 1).to_bits());
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EXPECT_EQ(static_cast<float16>(1.5 / (256.0 * 65536.0)).to_bits(), float16(0, 0, 2).to_bits());
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EXPECT_EQ(static_cast<float16>(1.25 / (256.0 * 65536.0)).to_bits(), float16(0, 0, 1).to_bits());
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EXPECT_EQ(static_cast<float16>(1.0 / (128.0 * 65536.0)).to_bits(), float16(0, 0, 2).to_bits());
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EXPECT_EQ(static_cast<float16>(1.5 / (128.0 * 65536.0)).to_bits(), float16(0, 0, 3).to_bits());
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EXPECT_EQ(static_cast<float16>(1.25 / (128.0 * 65536.0)).to_bits(), float16(0, 0, 2).to_bits());
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EXPECT_EQ(static_cast<float16>(std::numeric_limits<float>::infinity()).to_bits(),
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float16(0, 0x1F, 0).to_bits());
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EXPECT_EQ(static_cast<float16>(-std::numeric_limits<float>::infinity()).to_bits(),
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float16(1, 0x1F, 0).to_bits());
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EXPECT_TRUE(isnan(static_cast<float16>(std::numeric_limits<float>::quiet_NaN())));
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EXPECT_TRUE(isnan(static_cast<float16>(std::numeric_limits<float>::signaling_NaN())));
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EXPECT_EQ(static_cast<float16>(2.73786e-05).to_bits(), 459);
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EXPECT_EQ(static_cast<float16>(3.87722e-05).to_bits(), 650);
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EXPECT_EQ(static_cast<float16>(-0.0223043).to_bits(), 42422);
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EXPECT_EQ(static_cast<float16>(5.10779e-05).to_bits(), 857);
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EXPECT_EQ(static_cast<float16>(-5.10779e-05).to_bits(), 0x8359);
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EXPECT_EQ(static_cast<float16>(-2.553895e-05).to_bits(), 0x81ac);
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EXPECT_EQ(static_cast<float16>(-0.0001021558).to_bits(), 0x86b2);
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EXPECT_EQ(static_cast<float16>(5.960464477539063e-08).to_bits(), 0x01);
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EXPECT_EQ(static_cast<float16>(8.940696716308594e-08).to_bits(), 0x02);
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EXPECT_EQ(static_cast<float16>(65536.0).to_bits(), 0x7c00);
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EXPECT_EQ(static_cast<float16>(65519.0).to_bits(), 0x7bff);
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EXPECT_EQ(static_cast<float16>(65520.0).to_bits(), 0x7c00);
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}
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