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Diffstat (limited to 'lib/Target/Alpha/README.txt')
| -rw-r--r-- | lib/Target/Alpha/README.txt | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/lib/Target/Alpha/README.txt b/lib/Target/Alpha/README.txt deleted file mode 100644 index cc170e3..0000000 --- a/lib/Target/Alpha/README.txt +++ /dev/null @@ -1,42 +0,0 @@ -*** - -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 across bytes of bytewise abs(i8v8 a - i8v8 b)) - -cmpbytes bytewise cmpeq of i8v8 a and i8v8 b (not part of MVI extensions) - -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 |