Annotation of elwix/tools/oldlzma/SRC/7zip/Compress/Branch/BranchPPC.c, revision 1.1.1.1
1.1 misho 1: // BranchPPC.c
2:
3: #include "BranchPPC.h"
4:
5: UInt32 PPC_B_Convert(Byte *data, UInt32 size, UInt32 nowPos, int encoding)
6: {
7: UInt32 i;
8: for (i = 0; i + 4 <= size; i += 4)
9: {
10: // PowerPC branch 6(48) 24(Offset) 1(Abs) 1(Link)
11: if ((data[i] >> 2) == 0x12 &&
12: (
13: (data[i + 3] & 3) == 1
14: // || (data[i+3] & 3) == 3
15: )
16: )
17: {
18: UInt32 src = ((data[i + 0] & 3) << 24) |
19: (data[i + 1] << 16) |
20: (data[i + 2] << 8) |
21: (data[i + 3] & (~3));
22:
23: UInt32 dest;
24: if (encoding)
25: dest = nowPos + i + src;
26: else
27: dest = src - (nowPos + i);
28: data[i + 0] = 0x48 | ((dest >> 24) & 0x3);
29: data[i + 1] = (dest >> 16);
30: data[i + 2] = (dest >> 8);
31: data[i + 3] &= 0x3;
32: data[i + 3] |= dest;
33: }
34: }
35: return i;
36: }
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