Newer
Older
;;; -*- Package: PPC -*-
;;;
;;; **********************************************************************
;;; This code was written as part of the CMU Common Lisp project at
;;; Carnegie Mellon University, and has been placed in the public domain.
;;; If you want to use this code or any part of CMU Common Lisp, please contact
;;; Scott Fahlman or slisp-group@cs.cmu.edu.
;;;
(ext:file-comment
"$Header: /Volumes/share2/src/cmucl/cvs2git/cvsroot/src/compiler/ppc/system.lisp,v 1.3 2004/10/09 02:47:45 rtoy Exp $")
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
;;;
;;; **********************************************************************
;;;
;;; PPC VM definitions of various system hacking operations.
;;;
;;; Written by Rob MacLachlan
;;;
;;; Mips conversion by William Lott and Christopher Hoover.
;;;
(in-package "PPC")
;;;; Type frobbing VOPs
(define-vop (get-lowtag)
(:translate get-lowtag)
(:policy :fast-safe)
(:args (object :scs (any-reg descriptor-reg)))
(:results (result :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:generator 1
(inst andi. result object vm:lowtag-mask)))
(define-vop (get-type)
(:translate get-type)
(:policy :fast-safe)
(:args (object :scs (descriptor-reg) :to (:eval 1)))
(:results (result :scs (unsigned-reg) :from (:eval 0)))
(:result-types positive-fixnum)
(:generator 6
;; Grab the lowtag.
(inst andi. result object lowtag-mask)
;; Check for various pointer types.
(inst cmpwi result list-pointer-type)
(inst beq done)
(inst cmpwi result other-pointer-type)
(inst beq other-pointer)
(inst cmpwi result function-pointer-type)
(inst beq function-pointer)
(inst cmpwi result instance-pointer-type)
(inst beq done)
;; Okay, it is an immediate. If fixnum, we want zero. Otherwise,
;; we want the low 8 bits.
(inst andi. result object #b11)
(inst beq done)
;; It wasn't a fixnum, so get the low 8 bits.
(inst andi. result object type-mask)
(inst b done)
FUNCTION-POINTER
(load-type result object (- function-pointer-type))
(inst b done)
OTHER-POINTER
(load-type result object (- other-pointer-type))
DONE))
(define-vop (function-subtype)
(:translate function-subtype)
(:policy :fast-safe)
(:args (function :scs (descriptor-reg)))
(:results (result :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:generator 6
(load-type result function (- vm:function-pointer-type))))
(define-vop (set-function-subtype)
(:translate (setf function-subtype))
(:policy :fast-safe)
(:args (type :scs (unsigned-reg) :target result)
(function :scs (descriptor-reg)))
(:arg-types positive-fixnum *)
(:results (result :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:generator 6
(inst stb type function (- 3 function-pointer-type))
(move result type)))
(define-vop (get-header-data)
(:translate get-header-data)
(:policy :fast-safe)
(:args (x :scs (descriptor-reg)))
(:results (res :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:generator 6
(loadw res x 0 vm:other-pointer-type)
(inst srwi res res vm:type-bits)))
(define-vop (get-closure-length)
(:translate get-closure-length)
(:policy :fast-safe)
(:args (x :scs (descriptor-reg)))
(:results (res :scs (unsigned-reg)))
(:result-types positive-fixnum)
(:generator 6
(loadw res x 0 vm:function-pointer-type)
(inst srwi res res vm:type-bits)))
(define-vop (set-header-data)
(:translate set-header-data)
(:policy :fast-safe)
(:args (x :scs (descriptor-reg) :target res)
(data :scs (any-reg immediate zero)))
(:arg-types * positive-fixnum)
(:results (res :scs (descriptor-reg)))
(:temporary (:scs (non-descriptor-reg)) t1 t2)
(:generator 6
(loadw t1 x 0 vm:other-pointer-type)
(inst andi. t1 t1 vm:type-mask)
(sc-case data
(any-reg
(inst slwi t2 data (- vm:type-bits 2))
(inst or t1 t1 t2))
(immediate
(inst ori t1 t1 (ash (tn-value data) vm:type-bits)))
(zero))
(storew t1 x 0 vm:other-pointer-type)
(move res x)))
(define-vop (make-fixnum)
(:args (ptr :scs (any-reg descriptor-reg)))
(:results (res :scs (any-reg descriptor-reg)))
(:generator 1
;;
;; Some code (the hash table code) depends on this returning a
;; positive number so make sure it does.
(inst slwi res ptr 3)
(inst srwi res res 1)))
(define-vop (make-other-immediate-type)
(:args (val :scs (any-reg descriptor-reg))
(type :scs (any-reg descriptor-reg immediate)
:target temp))
(:results (res :scs (any-reg descriptor-reg)))
(:temporary (:scs (non-descriptor-reg)) temp)
(:generator 2
(sc-case type
(immediate
(inst slwi temp val vm:type-bits)
(inst ori res temp (tn-value type)))
(t
(inst srawi temp type 2)
(inst slwi res val (- vm:type-bits 2))
(inst or res res temp)))))
;;;; Allocation
(define-vop (dynamic-space-free-pointer)
(:results (int :scs (sap-reg)))
(:result-types system-area-pointer)
(:translate dynamic-space-free-pointer)
(:policy :fast-safe)
(:generator 1
(move int alloc-tn)))
(define-vop (binding-stack-pointer-sap)
(:results (int :scs (sap-reg)))
(:result-types system-area-pointer)
(:translate binding-stack-pointer-sap)
(:policy :fast-safe)
(:generator 1
(move int bsp-tn)))
(define-vop (control-stack-pointer-sap)
(:results (int :scs (sap-reg)))
(:result-types system-area-pointer)
(:translate control-stack-pointer-sap)
(:policy :fast-safe)
(:generator 1
(move int csp-tn)))
;;;; Code object frobbing.
(define-vop (code-instructions)
(:translate code-instructions)
(:policy :fast-safe)
(:args (code :scs (descriptor-reg)))
(:temporary (:scs (non-descriptor-reg)) ndescr)
(:results (sap :scs (sap-reg)))
(:result-types system-area-pointer)
(:generator 10
(loadw ndescr code 0 vm:other-pointer-type)
(inst srwi ndescr ndescr vm:type-bits)
(inst slwi ndescr ndescr vm:word-shift)
(inst subi ndescr ndescr vm:other-pointer-type)
(inst add sap code ndescr)))
(define-vop (compute-function)
(:args (code :scs (descriptor-reg))
(offset :scs (signed-reg unsigned-reg)))
(:arg-types * positive-fixnum)
(:results (func :scs (descriptor-reg)))
(:temporary (:scs (non-descriptor-reg)) ndescr)
(:generator 10
(loadw ndescr code 0 vm:other-pointer-type)
(inst srwi ndescr ndescr vm:type-bits)
(inst slwi ndescr ndescr vm:word-shift)
(inst add ndescr ndescr offset)
(inst addi ndescr ndescr (- vm:function-pointer-type vm:other-pointer-type))
(inst add func code ndescr)))
;;;; Other random VOPs.
(defknown unix::do-pending-interrupt () (values))
(define-vop (unix::do-pending-interrupt)
(:policy :fast-safe)
(:translate unix::do-pending-interrupt)
(:generator 1
(inst unimp pending-interrupt-trap)))
(define-vop (halt)
(:generator 1
(inst unimp halt-trap)))
;;;; Dynamic vop count collection support
(define-vop (count-me)
(:args (count-vector :scs (descriptor-reg)))
(:info index)
(:temporary (:scs (non-descriptor-reg)) count)
(:generator 1
(let ((offset
(- (* (+ index vector-data-offset) word-bytes) other-pointer-type)))
(assert (typep offset '(signed-byte 16)))
(inst lwz count count-vector offset)
(inst addi count count 1)
(inst stw count count-vector offset))))
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
(defknown read-time-base ()
(values (unsigned-byte 32) (unsigned-byte 32)))
(define-vop (read-time-base)
(:translate read-time-base)
(:args)
(:policy :fast-safe)
(:results (lo :scs (unsigned-reg))
(hi :scs (unsigned-reg)))
(:result-types unsigned-num unsigned-num)
(:temporary (:sc unsigned-reg) temp)
(:temporary (:sc unsigned-reg :target hi) temp-hi)
(:temporary (:sc unsigned-reg :target lo) temp-lo)
(:generator 7
;; From 2.2.1
(let ((loop (gen-label)))
(emit-label loop)
(inst mftbu temp-hi)
(inst mftb temp-lo)
(inst mftbu temp)
(inst cmpw temp temp-hi)
(inst bne loop)
(move hi temp-hi)
(move lo temp-lo))))
(defun read-cycle-counter ()
(read-time-base))