Changes in directory llvm/lib/Target/Alpha:
README.txt updated: 1.8 -> 1.9 --- Log message: Readme --- Diffs of the changes: (+42 -1) README.txt | 43 ++++++++++++++++++++++++++++++++++++++++++- 1 files changed, 42 insertions(+), 1 deletion(-) Index: llvm/lib/Target/Alpha/README.txt diff -u llvm/lib/Target/Alpha/README.txt:1.8 llvm/lib/Target/Alpha/README.txt:1.9 --- llvm/lib/Target/Alpha/README.txt:1.8 Thu Feb 15 20:11:59 2007 +++ llvm/lib/Target/Alpha/README.txt Sat Mar 31 10:05:44 2007 @@ -1 +1,42 @@ -* EMPTY * +*** + +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 _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
