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LLVM backend for 6502
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d51425a82d
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Evan Cheng d51425a82d Use movaps / movapd (instead of movss / movsd) to do FR32 / FR64 reg to reg 
transfer.

According to the Intel P4 Optimization Manual:

Moves that write a portion of a register can introduce unwanted
dependences. The movsd reg, reg instruction writes only the bottom
64 bits of a register, not to all 128 bits. This introduces a dependence on
the preceding instruction that produces the upper 64 bits (even if those
bits are not longer wanted). The dependence inhibits register renaming,
and thereby reduces parallelism.

Not to mention movaps is shorter than movss.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26226 91177308-0d34-0410-b5e6-96231b3b80d8
2006-02-16 01:50:02 +00:00
autoconf reverting previous change, will add support for other compilers later 2006-02-15 07:57:42 +00:00
docs Mention that delta can be used to reduce some Front-end problems. 2006-02-08 17:01:37 +00:00
examples
include/llvm Rename maxStoresPerMemSet to maxStoresPerMemset, etc. 2006-02-14 08:38:30 +00:00
lib Use movaps / movapd (instead of movss / movsd) to do FR32 / FR64 reg to reg 2006-02-16 01:50:02 +00:00
projects Convert over to the new way of handling lex/bison checked into cvs 2006-02-15 07:26:07 +00:00
runtime fix make install/uninstall of libcrtend. 2006-01-30 02:03:56 +00:00
test Code sufficiently protected against this test. 2006-02-15 17:20:59 +00:00
tools Adjust to new style "generated files in CVS" mechanism for lex output 2006-02-14 05:16:35 +00:00
utils Check the new form for bison output into CVS 2006-02-15 07:24:01 +00:00
win32 Match changes to unix build system. 2006-02-14 06:12:08 +00:00
Xcode Catch up on some of the file addition/deletions. 2006-01-27 13:24:20 +00:00
.cvsignore
configure reverting previous change, will add support for other compilers later 2006-02-15 07:57:42 +00:00
CREDITS.TXT Add an entry 2006-01-08 08:25:38 +00:00
LICENSE.TXT
llvm.spec
llvm.spec.in
Makefile
Makefile.common
Makefile.config.in
Makefile.rules bugfixes 2006-02-15 07:23:05 +00:00
README.txt

README.txt 

Low Level Virtual Machine (LLVM)
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