source: src/Common/Stats/ResolveTime.cc@ dc3fbe5

//
// Cforall Version 1.0.0 Copyright (C) 2019 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// ResolveTime.cc --
//
// Author           : Thierry Delisle
// Created On       : Wed Sep 16 15:45:51 2020
// Last Modified By :
// Last Modified On :
// Update Count     :
//

#include "ResolveTime.h"

#include <fstream>
#include <iomanip>

#include "AST/Fwd.hpp"
#include "AST/Expr.hpp"
#include "AST/Print.hpp"
#include "AST/Type.hpp"

namespace Stats {
        namespace ResolveTime {
                static inline long long rdtscl(void) {
                        #if defined( __i386 ) || defined( __x86_64 )
                                unsigned int lo, hi;
                                __asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
                                return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
                        #elif defined( __aarch64__ )
                                int64_t value;
                                asm volatile("mrs %0, cntvct_el0" : "=r"(value));
                                return value;
                        #else
                                #error unknown hardware architecture
                        #endif
                }

                extern bool enabled;
                bool started = false;
                long long before;
                std::ostream & out = std::cout;

                void start( const ast::Expr * expr ) {
                        if(enabled) {
                                assert(!started);
                                started = true;

                                out << expr->location << " : ";

                                before = rdtscl();
                        }
                }
                void stop() {
                        if(enabled) {
                                assert(started);
                                auto after = rdtscl();
                                out << (after - before) << std::endl;

                                started = false;
                        }
                }
        };
};