Changes in directory llvm/lib/Target/X86:
README.txt updated: 1.73 -> 1.74 --- Log message: Readme note --- Diffs of the changes: (+7 -0) README.txt | 7 +++++++ 1 files changed, 7 insertions(+) Index: llvm/lib/Target/X86/README.txt diff -u llvm/lib/Target/X86/README.txt:1.73 llvm/lib/Target/X86/README.txt:1.74 --- llvm/lib/Target/X86/README.txt:1.73 Fri Mar 24 01:12:19 2006 +++ llvm/lib/Target/X86/README.txt Sun Mar 26 13:19:27 2006 @@ -542,6 +542,13 @@ //===---------------------------------------------------------------------===// +We are currently lowering large (1MB+) memmove/memcpy to rep/stosl and rep/movsl +We should leave these as libcalls for everything over a much lower threshold, +since libc is hand tuned for medium and large mem ops (avoiding RFO for large +stores, TLB preheating, etc) + +//===---------------------------------------------------------------------===// + Lower memcpy / memset to a series of SSE 128 bit move instructions when it's feasible. _______________________________________________ llvm-commits mailing list llvm-commits@cs.uiuc.edu http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
