llvm/libc/test/src/__support/str_to_float_comparison_test.cpp

//===-- strtofloatingpoint comparison test --------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// #include "src/__support/str_float_conv_utils.h"

#include <stdlib.h>

// #include "src/__support/FPUtil/FPBits.h"

#include <cstdint>
#include <fstream>
#include <iostream>
#include <string>

// The intent of this test is to read in files in the format used in this test
// dataset: https://github.com/nigeltao/parse-number-fxx-test-data
// The format is as follows:
// Hexadecimal representations of IEEE754 floats in 16 bits, 32 bits, and 64
// bits, then the string that matches to them.

// 3C00 3F800000 3FF0000000000000 1.0

// By default, float_comp_in.txt is used as the test set, but once built this
// file can be run against the larger test set. To do that, clone the repository
// with the dataset, then navigate to the compiled binary of this file (it
// should be in llvm_project/build/bin). Run the following command:
// ./libc_str_to_float_comparison_test <path/to/dataset/repo>/data/*
// It will take a few seconds to run.

static inline uint32_t hexCharToU32(char in) { … }

// Fast because it assumes inStr points to exactly 8 uppercase hex chars
static inline uint32_t fastHexToU32(const char *inStr) { … }

// Fast because it assumes inStr points to exactly 8 uppercase hex chars
static inline uint64_t fastHexToU64(const char *inStr) { … }

int checkFile(char *inputFileName, int *totalFails, int *totalBitDiffs,
              int *detailedBitDiffs, int *total) { … }

int main(int argc, char *argv[]) { … }