llvm-6502

mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2025-01-10 02:36:06 +00:00

History

Scott Michel 0123b7dcfa Make tblgen a little smarter about constants smaller than i32. Currently,

tblgen will complain if a sign-extended constant does not fit into a
data type smaller than i32, e.g., i16. This causes a problem when certain
hex constants are used, such as 0xff for byte masks or immediate xor
values.

tblgen will try the sign-extended value first and, if the sign extended
value would overflow, it tries to see if the unsigned value will fit.
Consequently, a software developer can now safely incant:

	(XORHIr16 R16C:$rA, 0xffff)

which is somewhat clearer and more informative than incanting:

	(XORHIr16 R16C:$rA, (i16 -1))

even if the two are bitwise equivalent.

Tblgen also outputs the 64-bit unsigned constant in the generated ISel code
when getTargetConstant() is invoked.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@47188 91177308-0d34-0410-b5e6-96231b3b80d8

2008-02-15 23:05:48 +00:00

buildit

Remove dead code.

2008-02-12 18:20:50 +00:00

emacs

Modified to support comments better.

2007-12-19 06:20:05 +00:00

fpcmp

remove attributions from utils.

2007-12-29 20:37:13 +00:00

PerfectShuffle

remove attributions from utils.