1 ;;;; the sparc implementation of unknown-values VOPs
3 ;;;; This software is part of the SBCL system. See the README file for
6 ;;;; This software is derived from the CMU CL system, which was
7 ;;;; written at Carnegie Mellon University and released into the
8 ;;;; public domain. The software is in the public domain and is
9 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
10 ;;;; files for more information.
14 (define-vop (reset-stack-pointer)
15 (:args (ptr :scs (any-reg)))
19 (define-vop (%%pop-dx)
20 (:args (ptr :scs (any-reg)))
23 (bug "VOP %%POP-DX is not implemented.")))
25 (define-vop (%%nip-dx)
26 (:args (last-nipped-ptr :scs (any-reg) :target dest)
27 (last-preserved-ptr :scs (any-reg) :target src)
28 (moved-ptrs :scs (any-reg) :more t))
29 (:results (r-moved-ptrs :scs (any-reg) :more t))
30 (:temporary (:sc any-reg) src)
31 (:temporary (:sc any-reg) dest)
32 (:temporary (:sc non-descriptor-reg) temp)
34 last-nipped-ptr last-preserved-ptr moved-ptrs
37 (bug "VOP %%NIP-DX is not implemented.")))
39 (define-vop (%%nip-values)
40 (:args (last-nipped-ptr :scs (any-reg) :target dest)
41 (last-preserved-ptr :scs (any-reg) :target src)
42 (moved-ptrs :scs (any-reg) :more t))
43 (:results (r-moved-ptrs :scs (any-reg) :more t))
44 (:temporary (:sc any-reg) src)
45 (:temporary (:sc any-reg) dest)
46 (:temporary (:sc non-descriptor-reg) temp)
47 (:ignore r-moved-ptrs)
49 (inst move dest last-nipped-ptr)
50 (inst move src last-preserved-ptr)
53 (inst nop) ; not strictly necessary
56 (inst add dest dest n-word-bytes)
57 (inst add src src n-word-bytes)
63 (inst move csp-tn dest)
64 (inst sub src src dest)
65 (loop for moved = moved-ptrs then (tn-ref-across moved)
67 do (sc-case (tn-ref-tn moved)
68 ((descriptor-reg any-reg)
69 (inst sub (tn-ref-tn moved) (tn-ref-tn moved) src))
71 (load-stack-tn temp (tn-ref-tn moved))
72 (inst sub temp temp src)
73 (store-stack-tn (tn-ref-tn moved) temp))))))
75 ;;; Push some values onto the stack, returning the start and number of
76 ;;; values pushed as results. It is assumed that the Vals are wired
77 ;;; to the standard argument locations. Nvals is the number of values
80 ;;; The generator cost is pseudo-random. We could get it right by
81 ;;; defining a bogus SC that reflects the costs of the
82 ;;; memory-to-memory moves for each operand, but this seems
84 (define-vop (push-values)
85 (:args (vals :more t))
86 (:results (start :scs (any-reg) :from :load)
87 (count :scs (any-reg)))
89 (:temporary (:scs (descriptor-reg)) temp)
91 (inst move start csp-tn)
92 (inst add csp-tn csp-tn (* nvals n-word-bytes))
93 (do ((val vals (tn-ref-across val))
96 (let ((tn (tn-ref-tn val)))
101 (load-stack-tn temp tn)
102 (storew temp start i)))))
103 (inst li count (fixnumize nvals))))
105 ;;; Push a list of values on the stack, returning Start and Count as
106 ;;; used in unknown values continuations.
107 (define-vop (values-list)
108 (:args (arg :scs (descriptor-reg) :target list))
111 (:results (start :scs (any-reg))
112 (count :scs (any-reg)))
113 (:temporary (:scs (descriptor-reg) :type list :from (:argument 0)) list)
114 (:temporary (:scs (descriptor-reg)) temp)
115 (:temporary (:scs (non-descriptor-reg)) ndescr)
117 (:save-p :compute-only)
119 (let ((loop (gen-label))
126 (inst cmp list null-tn)
128 (loadw temp list cons-car-slot list-pointer-lowtag)
129 (loadw list list cons-cdr-slot list-pointer-lowtag)
130 (inst add csp-tn csp-tn n-word-bytes)
131 (storew temp csp-tn -1)
132 (test-type list loop nil (list-pointer-lowtag) :temp ndescr)
133 (error-call vop bogus-arg-to-values-list-error list)
136 (inst sub count csp-tn start))))
140 ;;; Copy the more arg block to the top of the stack so we can use them
141 ;;; as function arguments.
142 (define-vop (%more-arg-values)
143 (:args (context :scs (descriptor-reg any-reg) :target src)
144 (skip :scs (any-reg zero immediate))
145 (num :scs (any-reg) :target count))
146 (:arg-types * positive-fixnum positive-fixnum)
147 (:temporary (:sc any-reg :from (:argument 0)) src)
148 (:temporary (:sc any-reg :from (:argument 2)) dst)
149 (:temporary (:sc descriptor-reg :from (:argument 1)) temp)
150 (:temporary (:sc any-reg) i)
151 (:results (start :scs (any-reg))
152 (count :scs (any-reg)))
158 (inst add src context (* (tn-value skip) n-word-bytes)))
160 (inst add src context skip)))
161 (inst orcc count zero-tn num)
163 (inst move start csp-tn)
164 (inst move dst csp-tn)
165 (inst add csp-tn count)