mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-12-28 14:36:34 +00:00
43 lines
1.0 KiB
Plaintext
43 lines
1.0 KiB
Plaintext
***
|
|
|
|
add gcc builtins for alpha instructions
|
|
|
|
|
|
***
|
|
|
|
custom expand byteswap into nifty
|
|
extract/insert/mask byte/word/longword/quadword low/high
|
|
sequences
|
|
|
|
***
|
|
|
|
see if any of the extract/insert/mask operations can be added
|
|
|
|
***
|
|
|
|
match more interesting things for cmovlbc cmovlbs (move if low bit clear/set)
|
|
|
|
***
|
|
|
|
lower srem and urem
|
|
|
|
remq(i,j): i - (j * divq(i,j)) if j != 0
|
|
remqu(i,j): i - (j * divqu(i,j)) if j != 0
|
|
reml(i,j): i - (j * divl(i,j)) if j != 0
|
|
remlu(i,j): i - (j * divlu(i,j)) if j != 0
|
|
|
|
***
|
|
|
|
add crazy vector instructions (MVI):
|
|
|
|
(MIN|MAX)(U|S)(B8|W4) min and max, signed and unsigned, byte and word
|
|
PKWB, UNPKBW pack/unpack word to byte
|
|
PKLB UNPKBL pack/unpack long to byte
|
|
PERR pixel error (sum accross bytes of bytewise abs(i8v8 a - i8v8 b))
|
|
|
|
cmpbytes bytewise cmpeq of i8v8 a and i8v8 b (not part of MVI extentions)
|
|
|
|
this has some good examples for other operations that can be synthesised well
|
|
from these rather meager vector ops (such as saturating add).
|
|
http://www.alphalinux.org/docs/MVI-full.html
|