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/* Bra.c -- Converters for RISC code
2008-10-04 : Igor Pavlov : Public domain */
#include "crn_core.h"
#include "lzma_Bra.h"
namespace crnlib {
SizeT ARM_Convert(Byte* data, SizeT size, UInt32 ip, int encoding) {
SizeT i;
if (size < 4)
return 0;
size -= 4;
ip += 8;
for (i = 0; i <= size; i += 4) {
if (data[i + 3] == 0xEB) {
UInt32 dest;
UInt32 src = ((UInt32)data[i + 2] << 16) | ((UInt32)data[i + 1] << 8) | (data[i + 0]);
src <<= 2;
if (encoding)
dest = ip + (UInt32)i + src;
else
dest = src - (ip + (UInt32)i);
dest >>= 2;
data[i + 2] = (Byte)(dest >> 16);
data[i + 1] = (Byte)(dest >> 8);
data[i + 0] = (Byte)dest;
}
}
return i;
}
SizeT ARMT_Convert(Byte* data, SizeT size, UInt32 ip, int encoding) {
SizeT i;
if (size < 4)
return 0;
size -= 4;
ip += 4;
for (i = 0; i <= size; i += 2) {
if ((data[i + 1] & 0xF8) == 0xF0 &&
(data[i + 3] & 0xF8) == 0xF8) {
UInt32 dest;
UInt32 src =
(((UInt32)data[i + 1] & 0x7) << 19) |
((UInt32)data[i + 0] << 11) |
(((UInt32)data[i + 3] & 0x7) << 8) |
(data[i + 2]);
src <<= 1;
if (encoding)
dest = ip + (UInt32)i + src;
else
dest = src - (ip + (UInt32)i);
dest >>= 1;
data[i + 1] = (Byte)(0xF0 | ((dest >> 19) & 0x7));
data[i + 0] = (Byte)(dest >> 11);
data[i + 3] = (Byte)(0xF8 | ((dest >> 8) & 0x7));
data[i + 2] = (Byte)dest;
i += 2;
}
}
return i;
}
SizeT PPC_Convert(Byte* data, SizeT size, UInt32 ip, int encoding) {
SizeT i;
if (size < 4)
return 0;
size -= 4;
for (i = 0; i <= size; i += 4) {
if ((data[i] >> 2) == 0x12 && (data[i + 3] & 3) == 1) {
UInt32 src = ((UInt32)(data[i + 0] & 3) << 24) |
((UInt32)data[i + 1] << 16) |
((UInt32)data[i + 2] << 8) |
((UInt32)data[i + 3] & (~3));
UInt32 dest;
if (encoding)
dest = ip + (UInt32)i + src;
else
dest = src - (ip + (UInt32)i);
data[i + 0] = (Byte)(0x48 | ((dest >> 24) & 0x3));
data[i + 1] = (Byte)(dest >> 16);
data[i + 2] = (Byte)(dest >> 8);
data[i + 3] &= 0x3;
data[i + 3] |= dest;
}
}
return i;
}
SizeT SPARC_Convert(Byte* data, SizeT size, UInt32 ip, int encoding) {
UInt32 i;
if (size < 4)
return 0;
size -= 4;
for (i = 0; i <= size; i += 4) {
if (((data[i] == 0x40) && ((data[i + 1] & 0xC0) == 0x00)) ||
((data[i] == 0x7F) && ((data[i + 1] & 0xC0) == 0xC0))) {
UInt32 src =
((UInt32)data[i + 0] << 24) |
((UInt32)data[i + 1] << 16) |
((UInt32)data[i + 2] << 8) |
((UInt32)data[i + 3]);
UInt32 dest;
src <<= 2;
if (encoding)
dest = ip + i + src;
else
dest = src - (ip + i);
dest >>= 2;
dest = (((0 - ((dest >> 22) & 1)) << 22) & 0x3FFFFFFF) | (dest & 0x3FFFFF) | 0x40000000;
data[i + 0] = (Byte)(dest >> 24);
data[i + 1] = (Byte)(dest >> 16);
data[i + 2] = (Byte)(dest >> 8);
data[i + 3] = (Byte)dest;
}
}
return i;
}
}
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