/*
 * Copyright (C) 2023 The Android Open Source Project
 *
 * 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 "berberis/intrinsics/intrinsics.h"

#include <cstdint>
#include <tuple>

namespace berberis::intrinsics {

std::tuple<uint64_t> Bclri(uint64_t src, uint8_t imm) {
  return {src & ~(uint64_t{1} << imm)};
}

std::tuple<uint64_t> Bexti(uint64_t src, uint8_t imm) {
  return {(src >> imm) & uint64_t{1}};
}

std::tuple<uint64_t> Binvi(uint64_t src, uint8_t imm) {
  return {src ^ (uint64_t{1} << imm)};
}

std::tuple<uint64_t> Bseti(uint64_t src, uint8_t imm) {
  return {src | (uint64_t{1} << imm)};
}

#if defined(__x86_64__)
std::tuple<uint64_t> CPUClockCount() {
  uint64_t a, d;
  asm volatile("rdtsc" : "=a"(a), "=d"(d));
  return (d << 32) | a;
}
#endif

std::tuple<uint64_t> Slliuw(uint32_t src, uint8_t imm) {
  return {uint64_t{src} << imm};
}

void InitState() {
  // TODO(b/276787675): Initialize host MXCSR register once riscv64 intrinsics are supported.
}

}  // namespace berberis::intrinsics