Simplify EMIT-VOP further.

[sbcl.git] / src / compiler / alpha / pred.lisp

diff --git a/src/compiler/alpha/pred.lisp b/src/compiler/alpha/pred.lisp
index 1b15281..fe67c27 100644 (file)
--- a/src/compiler/alpha/pred.lisp
+++ b/src/compiler/alpha/pred.lisp
@@ -1,40 +1,48 @@
-;;; -*- Package: ALPHA -*-
-;;;
-;;; **********************************************************************
-;;; This code was written as part of the CMU Common Lisp project at
-;;; Carnegie Mellon University, and has been placed in the public domain.
-;;;
-
-;;;
-;;; **********************************************************************
-;;;
-;;;    This file contains the VM definition of predicate VOPs for the Alpha.
-;;;
-;;; Written by Rob MacLachlan
-;;;
-;;; Converted by Sean Hallgren.
-;;; 
-
-(in-package "SB!VM")
+;;;; the VM definition of predicate VOPs for the Alpha
 
+;;;; This software is part of the SBCL system. See the README file for
+;;;; more information.
+;;;;
+;;;; This software is derived from the CMU CL system, which was
+;;;; written at Carnegie Mellon University and released into the
+;;;; public domain. The software is in the public domain and is
+;;;; provided with absolutely no warranty. See the COPYING and CREDITS
+;;;; files for more information.
 
+(in-package "SB!VM")
 \f
-;;;; The Branch VOP.
+;;;; the Branch VOP
 
-;;; The unconditional branch, emitted when we can't drop through to the desired
-;;; destination.  Dest is the continuation we transfer control to.
-;;;
+;;; The unconditional branch, emitted when we can't drop through to
+;;; the desired destination. Dest is the continuation we transfer
+;;; control to.
 (define-vop (branch)
   (:info dest)
   (:generator 5
     (inst br zero-tn dest)))
 
 \f
-;;;; Conditional VOPs:
+;;;; Generic conditional VOPs
+
+;;; The generic conditional branch, emitted immediately after test
+;;; VOPs that only set flags.
+
+(define-vop (branch-if)
+  (:info dest flags not-p)
+  (:ignore dest flags not-p)
+  (:generator 0
+     (error "BRANCH-IF not yet implemented")))
+
+(defun convert-conditional-move-p (node dst-tn x-tn y-tn)
+  (declare (ignore node dst-tn x-tn y-tn))
+  nil)
+
+\f
+;;;; conditional VOPs
 
 (define-vop (if-eq)
   (:args (x :scs (any-reg descriptor-reg zero null))
-        (y :scs (any-reg descriptor-reg zero null)))
+         (y :scs (any-reg descriptor-reg zero null)))
   (:conditional)
   (:temporary (:scs (non-descriptor-reg)) temp)
   (:info target not-p)
@@ -43,5 +51,5 @@
   (:generator 3
     (inst cmpeq x y temp)
     (if not-p
-       (inst beq temp target)
-       (inst bne temp target))))
+        (inst beq temp target)
+        (inst bne temp target))))