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//*****************************************************************************
// Copyright 2017-2019 Intel Corporation
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//*****************************************************************************
#include "util/float_util.hpp"
union FloatUnion {
FloatUnion() { i = 0; }
FloatUnion(float val) { f = val; }
FloatUnion(uint32_t val) { i = val; }
float f;
uint32_t i;
};
union DoubleUnion {
DoubleUnion() { i = 0; }
DoubleUnion(double val) { d = val; }
DoubleUnion(uint64_t val) { i = val; }
double d;
uint64_t i;
};
std::string ngraph::test::bfloat16_to_bits(bfloat16 f)
{
std::stringstream ss;
ss << std::bitset<16>(f.to_bits());
std::string unformatted = ss.str();
std::string formatted;
formatted.reserve(41);
// Sign
formatted.push_back(unformatted[0]);
formatted.append(" ");
// Exponent
formatted.append(unformatted, 1, 8);
formatted.append(" ");
// Mantissa
formatted.append(unformatted, 9, 3);
for (int i = 12; i < 16; i += 4)
{
formatted.push_back(' ');
formatted.append(unformatted, i, 4);
}
return formatted;
}
std::string ngraph::test::float16_to_bits(float16 f)
{
std::stringstream ss;
ss << std::bitset<16>(f.to_bits());
std::string unformatted = ss.str();
std::string formatted;
formatted.reserve(41);
// Sign
formatted.push_back(unformatted[0]);
formatted.append(" ");
// Exponent
formatted.append(unformatted, 1, 5);
formatted.append(" ");
// Mantissa
formatted.append(unformatted, 6, 2);
for (int i = 8; i < 16; i += 4)
{
formatted.push_back(' ');
formatted.append(unformatted, i, 4);
}
return formatted;
}
std::string ngraph::test::float_to_bits(float f)
{
FloatUnion fu{f};
std::stringstream ss;
ss << std::bitset<32>(fu.i);
std::string unformatted = ss.str();
std::string formatted;
formatted.reserve(41);
// Sign
formatted.push_back(unformatted[0]);
formatted.append(" ");
// Exponent
formatted.append(unformatted, 1, 8);
formatted.append(" ");
// Mantissa
formatted.append(unformatted, 9, 3);
for (int i = 12; i < 32; i += 4)
{
formatted.push_back(' ');
formatted.append(unformatted, i, 4);
}
return formatted;
}
std::string ngraph::test::double_to_bits(double d)
{
DoubleUnion du{d};
std::stringstream ss;
ss << std::bitset<64>(du.i);
std::string unformatted = ss.str();
std::string formatted;
formatted.reserve(80);
// Sign
formatted.push_back(unformatted[0]);
formatted.append(" ");
// Exponent
formatted.append(unformatted, 1, 11);
formatted.push_back(' ');
// Mantissa
for (int i = 12; i < 64; i += 4)
{
formatted.push_back(' ');
formatted.append(unformatted, i, 4);
}
return formatted;
}
ngraph::bfloat16 ngraph::test::bits_to_bfloat16(const std::string& s)
{
std::string unformatted = s;
unformatted.erase(remove_if(unformatted.begin(), unformatted.end(), ::isspace),
unformatted.end());
if (unformatted.size() != 16)
{
throw ngraph_error("Input length must be 16");
}
std::bitset<16> bs(unformatted);
return bfloat16::from_bits(static_cast<uint16_t>(bs.to_ulong()));
}
ngraph::float16 ngraph::test::bits_to_float16(const std::string& s)
{
std::string unformatted = s;
unformatted.erase(remove_if(unformatted.begin(), unformatted.end(), ::isspace),
unformatted.end());
if (unformatted.size() != 16)
{
throw ngraph_error("Input length must be 16");
}
std::bitset<16> bs(unformatted);
return float16::from_bits(static_cast<uint16_t>(bs.to_ulong()));
}
float ngraph::test::bits_to_float(const std::string& s)
{
std::string unformatted = s;
unformatted.erase(remove_if(unformatted.begin(), unformatted.end(), ::isspace),
unformatted.end());
if (unformatted.size() != 32)
{
throw ngraph_error("Input length must be 32");
}
std::bitset<32> bs(unformatted);
FloatUnion fu;
fu.i = static_cast<uint32_t>(bs.to_ulong());
return fu.f;
}
double ngraph::test::bits_to_double(const std::string& s)
{
std::string unformatted = s;
unformatted.erase(remove_if(unformatted.begin(), unformatted.end(), ::isspace),
unformatted.end());
if (unformatted.size() != 64)
{
throw ngraph_error("Input length must be 64");
}
std::bitset<64> bs(unformatted);
DoubleUnion du;
du.i = static_cast<uint64_t>(bs.to_ullong());
return du.d;
}