bench.h

/******************************************************************************
 *                                                                            *
 * Copyright 2020-2021 Meng-Shan Jiang                                        *
 *                                                                            *
 * 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.                                             *
 *                                                                            *
 *****************************************************************************/

#pragma once

#include "config.h"

#if defined(__GNUC__) && defined(ARCH_AARCH64)
#include "sys/time.h"
#define BENCH_VARS               \
    u64 start_ticks, end_ticks;      \
    int64_t start_time, end_time                                                              

#define COUNTER_START()          \
  __asm__ volatile               \
    ("isb  \n"                   \
     "mrs %0, cntvct_el0  \n"    \
     : "=r" (start_ticks))

#define COUNTER_STOP()           \
  __asm__ volatile               \
    ("isb  \n"                   \
     "mrs %0, cntvct_el0  \n"    \
     : "=r" (end_ticks))

static inline int64_t gettime_i64()
{
    struct timeval tv;
    gettimeofday(&tv, NULL);
    return tv.tv_sec * 1000000UL + tv.tv_usec;
}

#define TIMER_START()            \
    start_time = gettime_i64()

#define TIMER_STOP()             \
    end_time = gettime_i64()

#define TICKS() (end_ticks - start_ticks)
#define USEC() (end_time - start_time)
#else

#error "timer not implemented."

#endif