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  1. Sep 26, 2012
  3. Feb 18, 2012
  5. Feb 02, 2012
    • Andrew Trick's avatar
      Instruction scheduling itinerary for Intel Atom. · 8523b16f
      Andrew Trick authored 
      Adds an instruction itinerary to all x86 instructions, giving each a default latency of 1, using the InstrItinClass IIC_DEFAULT.

Sets specific latencies for Atom for the instructions in files X86InstrCMovSetCC.td, X86InstrArithmetic.td, X86InstrControl.td, and X86InstrShiftRotate.td. The Atom latencies for the remainder of the x86 instructions will be set in subsequent patches.

Adds a test to verify that the scheduler is working.

Also changes the scheduling preference to "Hybrid" for i386 Atom, while leaving x86_64 as ILP.

Patch by Preston Gurd!

llvm-svn: 149558
      8523b16f
  7. Jan 03, 2012
  9. Oct 24, 2011
  11. Oct 23, 2011
  13. Nov 06, 2010
    • Chris Lattner's avatar
      rework the rotate-by-1 instructions to be defined like the · 64f91b98
      Chris Lattner authored 
      shift-by-1 instructions, where the asmstring doesn't contain
the implicit 1.  It turns out that a bunch of these rotate
instructions were completely broken because they used 1 
instead of $1.

This fixes assembly mismatches on "rclb	$1, %bl" and friends,
where we used to generate the 3 byte form, we now generate the
proper 2-byte form.

llvm-svn: 118355
      64f91b98
  15. Oct 05, 2010