/*-*- 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
ââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââââ¡
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/macros.internal.h"
#include "libc/math.h"
#include "libc/mem/mem.h"
#include "libc/str/str.h"
#include "tool/build/lib/flags.h"
#include "tool/build/lib/machine.h"

#define LDBL 3
#define RINT 0

static void ResetFpu(struct Machine *m) {
  long i;
  long double fval;
  fval = -NAN;
  m->fpu.sw = 0;
  m->fpu.tw = -1;
  m->fpu.cw = 0;
  m->fpu.im = true;
  m->fpu.dm = true;
  m->fpu.zm = true;
  m->fpu.om = true;
  m->fpu.um = true;
  m->fpu.pm = true;
  m->fpu.pc = LDBL;
  m->fpu.rc = RINT;
  for (i = 0; i < ARRAYLEN(m->fpu.st); ++i) {
    memcpy(&m->fpu.st[i], &fval, sizeof(fval));
  }
}

static void ResetSse(struct Machine *m) {
  m->sse.mxcsr = 0;
  m->sse.daz = false;
  m->sse.im = true;
  m->sse.dm = true;
  m->sse.zm = true;
  m->sse.om = true;
  m->sse.um = true;
  m->sse.pm = true;
  m->sse.rc = RINT;
  m->sse.ftz = false;
  bzero(m->xmm, sizeof(m->xmm));
}

void ResetInstructionCache(struct Machine *m) {
  memset(m->icache, -1, sizeof(m->icache));
}

void ResetCpu(struct Machine *m) {
  m->faultaddr = 0;
  m->stashsize = 0;
  m->stashaddr = 0;
  m->writeaddr = 0;
  m->readaddr = 0;
  m->writesize = 0;
  m->readsize = 0;
  m->flags = SetFlag(m->flags, FLAGS_DF, false);
  m->flags = SetFlag(m->flags, FLAGS_CF, false);
  m->flags = SetFlag(m->flags, FLAGS_ZF, false);
  m->flags = SetFlag(m->flags, FLAGS_SF, false);
  m->flags = SetFlag(m->flags, FLAGS_IF, true);
  m->flags = SetFlag(m->flags, FLAGS_F1, true);
  m->flags = SetFlag(m->flags, FLAGS_F0, false);
  m->flags = SetFlag(m->flags, FLAGS_IOPL, 3);
  bzero(m->reg, sizeof(m->reg));
  bzero(m->bofram, sizeof(m->bofram));
  bzero(&m->freelist, sizeof(m->freelist));
  ResetSse(m);
  ResetFpu(m);
}

void ResetTlb(struct Machine *m) {
  m->tlbindex = 0;
  bzero(m->tlb, sizeof(m->tlb));
  m->codevirt = 0;
  m->codehost = 0;
}
