/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-â
âvi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :viâ
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â Copyright 2020 Justine Alexandra Roberts Tunney                              â
â                                                                              â
â Permission to use, copy, modify, and/or distribute this software for         â
â any purpose with or without fee is hereby granted, provided that the         â
â above copyright notice and this permission notice appear in all copies.      â
â                                                                              â
â THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                â
â WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                â
â WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             â
â AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         â
â DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        â
â PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               â
â TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             â
â PERFORMANCE OF THIS SOFTWARE.                                                â
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ*/
#include "libc/calls/calls.h"
#include "libc/calls/struct/timespec.h"
#include "libc/nexgen32e/rdtsc.h"
#include "libc/sock/sock.h"
#include "libc/sysv/consts/clock.h"
#include "libc/sysv/consts/poll.h"
#include "libc/time/time.h"
#include "tool/build/lib/endian.h"
#include "tool/build/lib/modrm.h"
#include "tool/build/lib/time.h"

/**
 * @fileoverview i am the timelorde
 */

void OpPause(struct Machine *m, uint32_t rde) {
  struct pollfd pf;
  static bool once, interactive;
  if (!once) {
    interactive = isatty(0);
    once = true;
  }
  pf.fd = 0;
  pf.events = POLLIN;
  poll(&pf, 1, 20); /* make spin loops less brutal */
}

void OpRdtsc(struct Machine *m, uint32_t rde) {
  uint64_t c;
  struct timespec ts;
  clock_gettime(CLOCK_MONOTONIC, &ts);
  c = ts.tv_sec * 1000000000 + ts.tv_nsec;
  Write64(m->ax, (c >> 000) & 0xffffffff);
  Write64(m->dx, (c >> 040) & 0xffffffff);
}

static int64_t GetTscAux(struct Machine *m) {
  uint32_t core, node;
  core = 0;
  node = 0;
  return (node & 0xfff) << 12 | (core & 0xfff);
}

void OpRdtscp(struct Machine *m, uint32_t rde) {
  OpRdtsc(m, rde);
  Write64(m->cx, GetTscAux(m));
}

void OpRdpid(struct Machine *m, uint32_t rde) {
  Write64(RegRexbRm(m, rde), GetTscAux(m));
}
