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| author | Craig Topper <craig.topper@gmail.com> | 2014-01-06 06:02:58 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2014-01-06 06:02:58 +0000 |
| commit | 7ceb54a2a168a60a10c8a49c2858db780ae5f970 (patch) | |
| tree | 45e8e50dc3c66c453dca667df5f58634be245eb7 /llvm/lib/Target/Sparc/Disassembler/SparcDisassembler.cpp | |
| parent | 13199b17f831cd5354e33d85bee6869ca7cb52d9 (diff) | |
| download | llvm-7ceb54a2a168a60a10c8a49c2858db780ae5f970.zip llvm-7ceb54a2a168a60a10c8a49c2858db780ae5f970.tar.gz llvm-7ceb54a2a168a60a10c8a49c2858db780ae5f970.tar.bz2 | |
Add OpSize16 bit, for instructions which need 0x66 prefix in 16-bit mode
The 0x66 prefix toggles between 16-bit and 32-bit addressing mode.
So in 32-bit mode it is used to switch to 16-bit addressing mode for the
following instruction, while in 16-bit mode it's the other way round — it's
used to switch to 32-bit mode instead.
Thus, emit the 0x66 prefix byte for OpSize only in 32-bit (and 64-bit) mode,
and introduce a new OpSize16 bit which is used in 16-bit mode instead.
This is just the basic infrastructure for that change; a subsequent patch
will add the new OpSize16 bit to the 32-bit instructions that need it.
Patch from David Woodhouse.
llvm-svn: 198586
Diffstat (limited to 'llvm/lib/Target/Sparc/Disassembler/SparcDisassembler.cpp')
0 files changed, 0 insertions, 0 deletions