Annotation of elwix/tools/oldlzma/SRC/7zip/Compress/Branch/BranchPPC.c, revision 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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