/* BraIA64.c -- Converter for IA-64 code

2017-01-26 : Igor Pavlov : Public domain */

#include "Precomp.h"

#include "CpuArch.h"

#include "Bra.h"

SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)

{

  SizeT i;

  if (size < 16)

    return 0;

  size -= 16;

  i = 0;

  do

  {

    unsigned m = ((UInt32)0x334B0000 >> (data[i] & 0x1E)) & 3;

    if (m)

    {

      m++;

      do

      {

        Byte *p = data + (i + (size_t)m * 5 - 8);

        if (((p[3] >> m) & 15) == 5

            && (((p[-1] | ((UInt32)p[0] << 8)) >> m) & 0x70) == 0)

        {

          unsigned raw = GetUi32(p);

          unsigned v = raw >> m;

          v = (v & 0xFFFFF) | ((v & (1 << 23)) >> 3);

          v <<= 4;

          if (encoding)

            v += ip + (UInt32)i;

          else

            v -= ip + (UInt32)i;

          v >>= 4;

          v &= 0x1FFFFF;

          v += 0x700000;

          v &= 0x8FFFFF;

          raw &= ~((UInt32)0x8FFFFF << m);

          raw |= (v << m);

          SetUi32(p, raw);

        }

      }

      while (++m <= 4);

    }

    i += 16;

  }

  while (i <= size);

  return i;

}