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Craig Topper 30be10a06e 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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@198586 91177308-0d34-0410-b5e6-96231b3b80d8
2014-01-06 06:02:58 +00:00
autoconf Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
bindings Makefile.ocaml: Tweak to use --system-libs. 2013-12-20 00:36:59 +00:00
cmake Add a FIXME. 2014-01-05 00:37:45 +00:00
docs Fix typo. 2014-01-03 19:42:04 +00:00
examples [CMake] Update LLVM_LINK_COMPONENTS for each CMakeLists.txt. 2013-12-10 11:13:32 +00:00
include Support: add reference for ARM EHABI 2014-01-06 04:14:03 +00:00
lib Add OpSize16 bit, for instructions which need 0x66 prefix in 16-bit mode 2014-01-06 06:02:58 +00:00
projects Revert "Revert "Windows: Add support for unicode command lines"" 2013-10-07 01:00:07 +00:00
test Add OpSize16 bit, for instructions which need 0x66 prefix in 16-bit mode 2014-01-06 06:02:58 +00:00
tools [Mips] Add support for DT_MIPS_RLD_MAP and DT_MIPS_PLTGOT dynamic 2014-01-05 13:40:27 +00:00
unittests Add in a unittest for the one-use pattern matcher. 2014-01-05 09:14:53 +00:00
utils Use patterns to remove some duplicate instructions. 2014-01-05 06:55:48 +00:00
.arcconfig
.clang-format
.gitignore
CMakeLists.txt [CMake][VS][XCode] Restruct the output directory layout more comfortable, ${BINARY_DIR}/${BUILD_MODE}/(bin|lib) 2013-12-30 06:48:30 +00:00
CODE_OWNERS.TXT Update email address. 2013-12-04 09:42:49 +00:00
configure Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
CREDITS.TXT Fix documentation typos 2013-12-20 00:33:39 +00:00
LICENSE.TXT Update the copyright credits -- Happy new year 2014! 2014-01-01 08:27:31 +00:00
llvm.spec.in
LLVMBuild.txt Remove the very substantial, largely unmaintained legacy PGO 2013-10-02 15:42:23 +00:00
Makefile llvm-config: Fixup r197380, tweak for cross compilation. SYSTEM_LIBS should be --host's in BuildTools/llvm-config. 2013-12-16 13:09:06 +00:00
Makefile.common
Makefile.config.in
Makefile.rules [Mips]Work around MIPS linker issues exposed by commit r198087 until bug 18360 is resolved 2014-01-03 22:18:43 +00:00
README.txt Revert "Test commit to check e-mail address. Please discard this." 2013-10-04 10:59:13 +00:00

README.txt 

Low Level Virtual Machine (LLVM)
================================

This directory and its subdirectories contain source code for the Low Level
Virtual Machine, a toolkit for the construction of highly optimized compilers,
optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of
the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further
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documentation setup.

If you're writing a package for LLVM, see docs/Packaging.rst for our
suggestions.