src/compiler/ppc/pred.lisp

   1 ;;;
   2 ;;; Converted by William Lott.
   3 ;;;
   4
   5 (in-package "SB!VM")
   6
   7 \f
   8 ;;;; The Branch VOP.
   9
  10 ;;; The unconditional branch, emitted when we can't drop through to the desired
  11 ;;; destination.  Dest is the continuation we transfer control to.
  12 ;;;
  13 (define-vop (branch)
  14   (:info dest)
  15   (:generator 5
  16     (inst b dest)))
  17
  18 \f
  19 ;;;; Conditional VOPs:
  20
  21 (define-vop (if-eq)
  22   (:args (x :scs (any-reg descriptor-reg zero null))
  23          (y :scs (any-reg descriptor-reg zero null)))
  24   (:conditional)
  25   (:info target not-p)
  26   (:policy :fast-safe)
  27   (:translate eq)
  28   (:generator 3
  29     (inst cmpw x y)
  30     (inst b? (if not-p :ne :eq) target)))