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5 Commits

Author SHA1 Message Date
Chris Lattner
d302773885 fix visitShift to properly zero extend the shift amount if the provided operand 
is narrower than the shift register.  Doing an anyext provides undefined bits in
the top part of the register.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125457 91177308-0d34-0410-b5e6-96231b3b80d8
 2011-02-13 09:02:52 +00:00
Wesley Peck
4e9141fd4c Recommit 116986 with capitalization typo fixed. 
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116993 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-21 03:57:26 +00:00
Wesley Peck
60e7127e86 Reverting the commit 116986. It was breaking the build on llvm-x86_64-linux though it 
compiles on OS X. I'll ensure that it builds on a linux machine before committing
again.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116991 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-21 03:34:22 +00:00
Wesley Peck
13a949071c Major update of the MicroBlaze backend. The new features are: 
1. A delay slot filler that searches for valid instructions
       to fill the delay slot with. Previously NOPs would always
       be inserted into delay slots.
    2. Support for MC based instruction printer added.
    3. Support for MC based machine code generation and ELF
       file generation. ELF file generation does not yet
       completely work as much of the ELF support infrastructure
       is still x86/x86-64 specific.
    4. General clean up of the MBlaze backend code. Much of the
       tablegen code has been cleanup and simplified.

Bug Fixes:
    1. Removed duplicate periods from subtarget feature descriptions.
    2. Many of the instructions had bad machine code information
       in the tablegen files. Much of this has been fixed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116986 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-10-21 03:09:55 +00:00
Wesley Peck
a70f28ce7d Adding the MicroBlaze backend. 
The MicroBlaze is a highly configurable 32-bit soft-microprocessor for
use on Xilinx FPGAs. For more information see:
http://www.xilinx.com/tools/microblaze.htm
http://en.wikipedia.org/wiki/MicroBlaze

The current LLVM MicroBlaze backend generates assembly which can be
compiled using the an appropriate binutils assembler.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96969 91177308-0d34-0410-b5e6-96231b3b80d8
 2010-02-23 19:15:24 +00:00