+;;;; the MIPS implementation of unknown-values VOPs
+
+;;;; 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-vop (reset-stack-pointer)
(:generator 1
(move csp-tn ptr)))
+(define-vop (%%pop-dx)
+ (:args (ptr :scs (any-reg)))
+ (:ignore ptr)
+ (:generator 1
+ (bug "VOP %%POP-DX is not implemented.")))
+
+(define-vop (%%nip-dx)
+ (:args (last-nipped-ptr :scs (any-reg) :target dest)
+ (last-preserved-ptr :scs (any-reg) :target src)
+ (moved-ptrs :scs (any-reg) :more t))
+ (:results (r-moved-ptrs :scs (any-reg) :more t))
+ (:temporary (:sc any-reg) src)
+ (:temporary (:sc any-reg) dest)
+ (:temporary (:sc non-descriptor-reg) temp)
+ (:ignore r-moved-ptrs
+ last-nipped-ptr last-preserved-ptr moved-ptrs
+ src dest temp)
+ (:generator 1
+ (bug "VOP %%NIP-DX is not implemented.")))
+
+(define-vop (%%nip-values)
+ (:args (last-nipped-ptr :scs (any-reg) :target dest)
+ (last-preserved-ptr :scs (any-reg) :target src)
+ (moved-ptrs :scs (any-reg) :more t))
+ (:results (r-moved-ptrs :scs (any-reg) :more t))
+ (:temporary (:sc any-reg) src)
+ (:temporary (:sc any-reg) dest)
+ (:temporary (:sc non-descriptor-reg) temp)
+ (:ignore r-moved-ptrs)
+ (:generator 1
+ (move src last-preserved-ptr)
+ (move dest last-nipped-ptr)
+ (inst sltu temp src csp-tn)
+ (inst beq temp DONE)
+ (inst nop) ; not strictly necessary
+ LOOP
+ (loadw temp src)
+ (inst add dest dest n-word-bytes)
+ (inst add src src n-word-bytes)
+ (storew temp dest -1)
+ (inst sltu temp src csp-tn)
+ (inst bne temp LOOP)
+ (inst nop)
+ DONE
+ (move csp-tn dest)
+ (inst sub src src dest)
+ (loop for moved = moved-ptrs then (tn-ref-across moved)
+ while moved
+ do (sc-case (tn-ref-tn moved)
+ ((descriptor-reg any-reg)
+ (inst sub (tn-ref-tn moved) (tn-ref-tn moved) src))
+ ((control-stack)
+ (load-stack-tn temp (tn-ref-tn moved))
+ (inst sub temp temp src)
+ (store-stack-tn (tn-ref-tn moved) temp))))))
;;; Push some values onto the stack, returning the start and number of values
;;; pushed as results. It is assumed that the Vals are wired to the standard
(:info nvals)
(:temporary (:scs (descriptor-reg)) temp)
(:temporary (:scs (descriptor-reg)
- :to (:result 0)
- :target start)
- start-temp)
+ :to (:result 0)
+ :target start)
+ start-temp)
(:generator 20
(move start-temp csp-tn)
(inst addu csp-tn csp-tn (* nvals n-word-bytes))
(do ((val vals (tn-ref-across val))
- (i 0 (1+ i)))
- ((null val))
+ (i 0 (1+ i)))
+ ((null val))
(let ((tn (tn-ref-tn val)))
- (sc-case tn
- (descriptor-reg
- (storew tn start-temp i))
- (control-stack
- (load-stack-tn temp tn)
- (storew temp start-temp i)))))
+ (sc-case tn
+ (descriptor-reg
+ (storew tn start-temp i))
+ (control-stack
+ (load-stack-tn temp tn)
+ (storew temp start-temp i)))))
(move start start-temp)
(inst li count (fixnumize nvals))))
-
;;; Push a list of values on the stack, returning Start and Count as used in
;;; unknown values continuations.
-;;;
(define-vop (values-list)
(:args (arg :scs (descriptor-reg) :target list))
(:arg-types list)
(:policy :fast-safe)
(:results (start :scs (any-reg))
- (count :scs (any-reg)))
+ (count :scs (any-reg)))
(:temporary (:scs (descriptor-reg) :type list :from (:argument 0)) list)
(:temporary (:scs (descriptor-reg)) temp)
(:temporary (:scs (non-descriptor-reg)) ndescr)
(:generator 0
(move list arg)
(move start csp-tn)
-
+
LOOP
(inst beq list null-tn done)
(loadw temp list cons-car-slot list-pointer-lowtag)
(storew temp csp-tn -1)
(inst and ndescr list lowtag-mask)
(inst xor ndescr list-pointer-lowtag)
- (inst beq ndescr zero-tn loop)
+ (inst beq ndescr loop)
(inst nop)
(error-call vop bogus-arg-to-values-list-error list)
-
+
DONE
(inst subu count csp-tn start)))
-
;;; Copy the more arg block to the top of the stack so we can use them
;;; as function arguments.
-;;;
(define-vop (%more-arg-values)
(:args (context :scs (descriptor-reg any-reg) :target src)
- (skip :scs (any-reg zero immediate))
- (num :scs (any-reg) :target count))
+ (skip :scs (any-reg zero immediate))
+ (num :scs (any-reg) :target count))
(:arg-types * positive-fixnum positive-fixnum)
(:temporary (:sc any-reg :from (:argument 0)) src)
(:temporary (:sc any-reg :from (:argument 2)) dst)
(:temporary (:sc descriptor-reg :from (:argument 1)) temp)
(:results (start :scs (any-reg))
- (count :scs (any-reg)))
+ (count :scs (any-reg)))
(:generator 20
(sc-case skip
(zero
(any-reg
(inst addu src context skip)))
(move count num)
- (inst beq num zero-tn done)
- (inst move start csp-tn)
- (inst move dst csp-tn)
+ (inst beq num done)
+ (move start csp-tn t)
+ (move dst csp-tn)
(inst addu csp-tn count)
LOOP
(inst lw temp src)
- (inst addu src 4)
- (inst addu dst 4)
+ (inst addu src n-word-bytes)
+ (inst addu dst n-word-bytes)
(inst bne dst csp-tn loop)
- (inst sw temp dst -4)
+ (inst sw temp dst (- n-word-bytes))
DONE))
projects / sbcl.git / blobdiff