Annotation of elwix/tools/oldlzma/SRC/7zip/Compress/Branch/BranchARMThumb.c, revision 1.1.1.1
1.1 misho 1: // BranchARMThumb.c
2:
3: #include "BranchARMThumb.h"
4:
5: UInt32 ARMThumb_Convert(Byte *data, UInt32 size, UInt32 nowPos, int encoding)
6: {
7: UInt32 i;
8: for (i = 0; i + 4 <= size; i += 2)
9: {
10: if ((data[i + 1] & 0xF8) == 0xF0 &&
11: (data[i + 3] & 0xF8) == 0xF8)
12: {
13: UInt32 src =
14: ((data[i + 1] & 0x7) << 19) |
15: (data[i + 0] << 11) |
16: ((data[i + 3] & 0x7) << 8) |
17: (data[i + 2]);
18:
19: src <<= 1;
20: UInt32 dest;
21: if (encoding)
22: dest = nowPos + i + 4 + src;
23: else
24: dest = src - (nowPos + i + 4);
25: dest >>= 1;
26:
27: data[i + 1] = 0xF0 | ((dest >> 19) & 0x7);
28: data[i + 0] = (dest >> 11);
29: data[i + 3] = 0xF8 | ((dest >> 8) & 0x7);
30: data[i + 2] = (dest);
31: i += 2;
32: }
33: }
34: return i;
35: }
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