Merge pull request #511 from negativeExponent/updates

[pcsx_rearmed.git] / deps / lzma-16.04 / C / Bra.c

/* Bra.c -- Converters for RISC code\r
2010-04-16 : Igor Pavlov : Public domain */\r
\r
#include "Precomp.h"\r
\r
#include "Bra.h"\r
\r
SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r
{\r
  SizeT i;\r
  if (size < 4)\r
    return 0;\r
  size -= 4;\r
  ip += 8;\r
  for (i = 0; i <= size; i += 4)\r
  {\r
    if (data[i + 3] == 0xEB)\r
    {\r
      UInt32 dest;\r
      UInt32 src = ((UInt32)data[i + 2] << 16) | ((UInt32)data[i + 1] << 8) | (data[i + 0]);\r
      src <<= 2;\r
      if (encoding)\r
        dest = ip + (UInt32)i + src;\r
      else\r
        dest = src - (ip + (UInt32)i);\r
      dest >>= 2;\r
      data[i + 2] = (Byte)(dest >> 16);\r
      data[i + 1] = (Byte)(dest >> 8);\r
      data[i + 0] = (Byte)dest;\r
    }\r
  }\r
  return i;\r
}\r
\r
SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r
{\r
  SizeT i;\r
  if (size < 4)\r
    return 0;\r
  size -= 4;\r
  ip += 4;\r
  for (i = 0; i <= size; i += 2)\r
  {\r
    if ((data[i + 1] & 0xF8) == 0xF0 &&\r
        (data[i + 3] & 0xF8) == 0xF8)\r
    {\r
      UInt32 dest;\r
      UInt32 src =\r
        (((UInt32)data[i + 1] & 0x7) << 19) |\r
        ((UInt32)data[i + 0] << 11) |\r
        (((UInt32)data[i + 3] & 0x7) << 8) |\r
        (data[i + 2]);\r
      \r
      src <<= 1;\r
      if (encoding)\r
        dest = ip + (UInt32)i + src;\r
      else\r
        dest = src - (ip + (UInt32)i);\r
      dest >>= 1;\r
      \r
      data[i + 1] = (Byte)(0xF0 | ((dest >> 19) & 0x7));\r
      data[i + 0] = (Byte)(dest >> 11);\r
      data[i + 3] = (Byte)(0xF8 | ((dest >> 8) & 0x7));\r
      data[i + 2] = (Byte)dest;\r
      i += 2;\r
    }\r
  }\r
  return i;\r
}\r
\r
SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r
{\r
  SizeT i;\r
  if (size < 4)\r
    return 0;\r
  size -= 4;\r
  for (i = 0; i <= size; i += 4)\r
  {\r
    if ((data[i] >> 2) == 0x12 && (data[i + 3] & 3) == 1)\r
    {\r
      UInt32 src = ((UInt32)(data[i + 0] & 3) << 24) |\r
        ((UInt32)data[i + 1] << 16) |\r
        ((UInt32)data[i + 2] << 8) |\r
        ((UInt32)data[i + 3] & (~3));\r
      \r
      UInt32 dest;\r
      if (encoding)\r
        dest = ip + (UInt32)i + src;\r
      else\r
        dest = src - (ip + (UInt32)i);\r
      data[i + 0] = (Byte)(0x48 | ((dest >> 24) &  0x3));\r
      data[i + 1] = (Byte)(dest >> 16);\r
      data[i + 2] = (Byte)(dest >> 8);\r
      data[i + 3] &= 0x3;\r
      data[i + 3] |= dest;\r
    }\r
  }\r
  return i;\r
}\r
\r
SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding)\r
{\r
  UInt32 i;\r
  if (size < 4)\r
    return 0;\r
  size -= 4;\r
  for (i = 0; i <= size; i += 4)\r
  {\r
    if ((data[i] == 0x40 && (data[i + 1] & 0xC0) == 0x00) ||\r
        (data[i] == 0x7F && (data[i + 1] & 0xC0) == 0xC0))\r
    {\r
      UInt32 src =\r
        ((UInt32)data[i + 0] << 24) |\r
        ((UInt32)data[i + 1] << 16) |\r
        ((UInt32)data[i + 2] << 8) |\r
        ((UInt32)data[i + 3]);\r
      UInt32 dest;\r
      \r
      src <<= 2;\r
      if (encoding)\r
        dest = ip + i + src;\r
      else\r
        dest = src - (ip + i);\r
      dest >>= 2;\r
      \r
      dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF) | (dest & 0x3FFFFF) | 0x40000000;\r
\r
      data[i + 0] = (Byte)(dest >> 24);\r
      data[i + 1] = (Byte)(dest >> 16);\r
      data[i + 2] = (Byte)(dest >> 8);\r
      data[i + 3] = (Byte)dest;\r
    }\r
  }\r
  return i;\r
}\r