-;;; Written by Rob MacLachlan.
-;;; SPARC conversion by William Lott.
-;;;
-(in-package "SB!VM")
+;;;; the PPC VM definition of operand loading/saving and the Move VOP
+;;;; 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")
(define-move-fun (load-immediate 1) (vop x y)
((null immediate zero)
(load-symbol y val))
(character
(inst lr y (logior (ash (char-code val) n-widetag-bits)
- base-char-widetag))))))
+ character-widetag))))))
(define-move-fun (load-number 1) (vop x y)
((immediate zero)
(signed-reg unsigned-reg))
(inst lr y (tn-value x)))
-(define-move-fun (load-base-char 1) (vop x y)
- ((immediate) (base-char-reg))
+(define-move-fun (load-character 1) (vop x y)
+ ((immediate) (character-reg))
(inst li y (char-code (tn-value x))))
(define-move-fun (load-system-area-pointer 1) (vop x y)
(load-stack-tn y x))
(define-move-fun (load-number-stack 5) (vop x y)
- ((base-char-stack) (base-char-reg)
+ ((character-stack) (character-reg)
(sap-stack) (sap-reg)
(signed-stack) (signed-reg)
(unsigned-stack) (unsigned-reg))
(store-stack-tn y x))
(define-move-fun (store-number-stack 5) (vop x y)
- ((base-char-reg) (base-char-stack)
+ ((character-reg) (character-stack)
(sap-reg) (sap-stack)
(signed-reg) (signed-stack)
(unsigned-reg) (unsigned-stack))
\f
;;;; The Move VOP:
-;;;
(define-vop (move)
(:args (x :target y
- :scs (any-reg descriptor-reg zero null)
- :load-if (not (location= x y))))
+ :scs (any-reg descriptor-reg zero null)
+ :load-if (not (location= x y))))
(:results (y :scs (any-reg descriptor-reg)
- :load-if (not (location= x y))))
+ :load-if (not (location= x y))))
(:effects)
(:affected)
(:generator 0
(any-reg descriptor-reg)
(any-reg descriptor-reg))
-;;; Make Move the check VOP for T so that type check generation doesn't think
-;;; it is a hairy type. This also allows checking of a few of the values in a
-;;; continuation to fall out.
-;;;
+;;; Make MOVE the check VOP for T so that type check generation
+;;; doesn't think it is a hairy type. This also allows checking of a
+;;; few of the values in a continuation to fall out.
(primitive-type-vop move (:check) t)
-;;; The Move-Argument VOP is used for moving descriptor values into another
+;;; The MOVE-ARG VOP is used for moving descriptor values into another
;;; frame for argument or known value passing.
-;;;
(define-vop (move-arg)
(:args (x :target y
- :scs (any-reg descriptor-reg zero null))
- (fp :scs (any-reg)
- :load-if (not (sc-is y any-reg descriptor-reg))))
+ :scs (any-reg descriptor-reg zero null))
+ (fp :scs (any-reg)
+ :load-if (not (sc-is y any-reg descriptor-reg))))
(:results (y))
(:generator 0
(sc-case y
\f
;;;; ILLEGAL-MOVE
-;;; This VOP exists just to begin the lifetime of a TN that couldn't be written
-;;; legally due to a type error. An error is signalled before this VOP is
-;;; so we don't need to do anything (not that there would be anything sensible
-;;; to do anyway.)
-;;;
+;;; This VOP exists just to begin the lifetime of a TN that couldn't
+;;; be written legally due to a type error. An error is signalled
+;;; before this VOP is so we don't need to do anything (not that there
+;;; would be anything sensible to do anyway.)
(define-vop (illegal-move)
(:args (x) (type))
(:results (y))
(:vop-var vop)
(:save-p :compute-only)
(:generator 666
- (error-call vop object-not-type-error x type)))
+ (error-call vop 'object-not-type-error x type)))
\f
;;; representation. Similarly, the MOVE-FROM-WORD VOPs converts a raw integer
;;; to a tagged bignum or fixnum.
-;;; Arg is a fixnum, so just shift it. We need a type restriction because some
+;;; ARG is a fixnum, so just shift it. We need a type restriction because some
;;; possible arg SCs (control-stack) overlap with possible bignum arg SCs.
-;;;
(define-vop (move-to-word/fixnum)
(:args (x :scs (any-reg descriptor-reg)))
(:results (y :scs (signed-reg unsigned-reg)))
(:arg-types tagged-num)
(:note "fixnum untagging")
(:generator 1
- (inst srawi y x 2)))
-;;;
+ (inst srawi y x n-fixnum-tag-bits)))
(define-move-vop move-to-word/fixnum :move
(any-reg descriptor-reg) (signed-reg unsigned-reg))
-;;; Arg is a non-immediate constant, load it.
+;;; ARG is a non-immediate constant; load it.
(define-vop (move-to-word-c)
(:args (x :scs (constant)))
(:results (y :scs (signed-reg unsigned-reg)))
(:note "constant load")
(:generator 1
- (inst lr y (tn-value x))))
-;;;
+ (cond ((sb!c::tn-leaf x)
+ (inst lr y (tn-value x)))
+ (t
+ (loadw y code-tn (tn-offset x) other-pointer-lowtag)
+ (inst srawi y y n-fixnum-tag-bits)))))
(define-move-vop move-to-word-c :move
(constant) (signed-reg unsigned-reg))
-
-;;; Arg is a fixnum or bignum, figure out which and load if necessary.
+;;; ARG is a fixnum or bignum; figure out which and load if necessary.
(define-vop (move-to-word/integer)
(:args (x :scs (descriptor-reg)))
(:results (y :scs (signed-reg unsigned-reg)))
(:temporary (:scs (non-descriptor-reg)) temp)
(:generator 4
(let ((done (gen-label)))
- (inst andi. temp x 3)
+ (inst andi. temp x fixnum-tag-mask)
(sc-case y
- (signed-reg
- (inst srawi y x 2))
- (unsigned-reg
- (inst srwi y x 2)))
-
+ (signed-reg
+ (inst srawi y x n-fixnum-tag-bits))
+ (unsigned-reg
+ (inst srwi y x n-fixnum-tag-bits)))
+
(inst beq done)
(loadw y x bignum-digits-offset other-pointer-lowtag)
-
+
(emit-label done))))
-;;;
(define-move-vop move-to-word/integer :move
(descriptor-reg) (signed-reg unsigned-reg))
-
-
-;;; Result is a fixnum, so we can just shift. We need the result type
+;;; RESULT is a fixnum, so we can just shift. We need the result type
;;; restriction because of the control-stack ambiguity noted above.
-;;;
(define-vop (move-from-word/fixnum)
(:args (x :scs (signed-reg unsigned-reg)))
(:results (y :scs (any-reg descriptor-reg)))
(:result-types tagged-num)
(:note "fixnum tagging")
(:generator 1
- (inst slwi y x 2)))
-;;;
+ (inst slwi y x n-fixnum-tag-bits)))
(define-move-vop move-from-word/fixnum :move
(signed-reg unsigned-reg) (any-reg descriptor-reg))
-
-;;; Result may be a bignum, so we have to check. Use a worst-case cost to make
-;;; sure people know they may be number consing.
-;;;
+;;; RESULT may be a bignum, so we have to check. Use a worst-case
+;;; cost to make sure people know they may be number consing.
(define-vop (move-from-signed)
(:args (arg :scs (signed-reg unsigned-reg) :target x))
(:results (y :scs (any-reg descriptor-reg)))
(:generator 20
(move x arg)
(let ((done (gen-label)))
- (inst mcrxr :cr0) ; clear sticky overflow bits in XER, CR0
+ (inst mtxer zero-tn) ; clear sticky overflow bit in XER, CR0
(inst addo temp x x) ; set XER OV if top two bits differ
(inst addo. temp temp temp) ; set CR0 SO if any top three bits differ
- (inst slwi y x 2) ; assume fixnum (tagged ok, maybe lost some high bits)
+ (inst slwi y x n-fixnum-tag-bits) ; assume fixnum (tagged ok, maybe lost some high bits)
(inst bns done)
-
+
(with-fixed-allocation (y pa-flag temp bignum-widetag (1+ bignum-digits-offset))
- (storew x y bignum-digits-offset other-pointer-lowtag))
+ (storew x y bignum-digits-offset other-pointer-lowtag))
(emit-label done))))
-;;;
(define-move-vop move-from-signed :move
(signed-reg) (descriptor-reg))
-
-;;; Check for fixnum, and possibly allocate one or two word bignum result. Use
-;;; a worst-case cost to make sure people know they may be number consing.
-;;;
+;;; Check for fixnum, and possibly allocate one or two word bignum
+;;; result. Use a worst-case cost to make sure people know they may
+;;; be number consing.
(define-vop (move-from-unsigned)
(:args (arg :scs (signed-reg unsigned-reg) :target x))
(:results (y :scs (any-reg descriptor-reg)))
(:generator 20
(move x arg)
(let ((done (gen-label))
- (one-word (gen-label))
- (initial-alloc (pad-data-block (1+ bignum-digits-offset))))
- (inst srawi. temp x 29)
- (inst slwi y x 2)
+ (one-word (gen-label)))
+ (inst srawi. temp x n-positive-fixnum-bits)
+ (inst slwi y x n-fixnum-tag-bits)
(inst beq done)
-
- (pseudo-atomic (pa-flag :extra initial-alloc)
- (inst cmpwi x 0)
- (inst ori y alloc-tn other-pointer-lowtag)
- (inst li temp (logior (ash 1 n-widetag-bits) bignum-widetag))
- (inst bge one-word)
- (inst addi alloc-tn alloc-tn
- (- (pad-data-block (+ bignum-digits-offset 2))
- (pad-data-block (+ bignum-digits-offset 1))))
- (inst li temp (logior (ash 2 n-widetag-bits) bignum-widetag))
- (emit-label one-word)
- (storew temp y 0 other-pointer-lowtag)
- (storew x y bignum-digits-offset other-pointer-lowtag))
+
+ (with-fixed-allocation
+ (y pa-flag temp bignum-widetag (+ 2 bignum-digits-offset))
+ (inst cmpwi x 0)
+ (inst li temp (logior (ash 1 n-widetag-bits) bignum-widetag))
+ (inst bge one-word)
+ (inst li temp (logior (ash 2 n-widetag-bits) bignum-widetag))
+ (emit-label one-word)
+ (storew temp y 0 other-pointer-lowtag)
+ (storew x y bignum-digits-offset other-pointer-lowtag))
(emit-label done))))
-;;;
(define-move-vop move-from-unsigned :move
(unsigned-reg) (descriptor-reg))
;;; Move untagged numbers.
-;;;
(define-vop (word-move)
(:args (x :target y
- :scs (signed-reg unsigned-reg)
- :load-if (not (location= x y))))
+ :scs (signed-reg unsigned-reg)
+ :load-if (not (location= x y))))
(:results (y :scs (signed-reg unsigned-reg)
- :load-if (not (location= x y))))
+ :load-if (not (location= x y))))
(:effects)
(:affected)
(:note "word integer move")
(:generator 0
(move y x)))
-;;;
(define-move-vop word-move :move
(signed-reg unsigned-reg) (signed-reg unsigned-reg))
;;; Move untagged number arguments/return-values.
-;;;
(define-vop (move-word-arg)
(:args (x :target y
- :scs (signed-reg unsigned-reg))
- (fp :scs (any-reg)
- :load-if (not (sc-is y sap-reg))))
+ :scs (signed-reg unsigned-reg))
+ (fp :scs (any-reg)
+ :load-if (not (sc-is y sap-reg))))
(:results (y))
(:note "word integer argument move")
(:generator 0
(move y x))
((signed-stack unsigned-stack)
(storew x fp (tn-offset y))))))
-;;;
(define-move-vop move-word-arg :move-arg
(descriptor-reg any-reg signed-reg unsigned-reg) (signed-reg unsigned-reg))
-
-;;; Use standard MOVE-ARGUMENT + coercion to move an untagged number to a
+;;; Use standard MOVE-ARG + coercion to move an untagged number to a
;;; descriptor passing location.
-;;;
(define-move-vop move-arg :move-arg
(signed-reg unsigned-reg) (any-reg descriptor-reg))
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