1
2
3
4
5
6
7
8
9
10
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
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
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
|
%% -*- erlang-indent-level: 2 -*-
%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 2001-2016. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
-module(hipe_sparc_registers).
-export([reg_name_gpr/1,
reg_name_fpr/1,
first_virtual/0,
is_precoloured_gpr/1,
is_precoloured_fpr/1,
all_precoloured/0, % for coalescing ra
return_value/0,
temp1/0,
temp2/0,
temp3/0,
heap_pointer/0,
stack_pointer/0,
proc_pointer/0,
return_address/0,
g0/0,
%% heap_limit/0,
%% fcalls/0,
allocatable_gpr/0, % for coalescing ra
allocatable_fpr/0,
is_fixed/1, % for graph_coloring ra
nr_args/0,
arg/1,
args/1,
is_arg/1, % for linear_scan ra
call_clobbered/0,
tailcall_clobbered/0,
live_at_return/0
]).
-include("../rtl/hipe_literals.hrl").
-define(G0, 0).
-define(G1, 1).
-define(G2, 2).
-define(G3, 3).
-define(G4, 4).
-define(G5, 5).
-define(G6, 6).
-define(G7, 7).
-define(O0, 8).
-define(O1, 9).
-define(O2, 10).
-define(O3, 11).
-define(O4, 12).
-define(O5, 13).
-define(O6, 14).
-define(O7, 15).
-define(L0, 16).
-define(L1, 17).
-define(L2, 18).
-define(L3, 19).
-define(L4, 20).
-define(L5, 21).
-define(L6, 22).
-define(L7, 23).
-define(I0, 24).
-define(I1, 25).
-define(I2, 26).
-define(I3, 27).
-define(I4, 28).
-define(I5, 29).
-define(I6, 30).
-define(I7, 31).
-define(LAST_PRECOLOURED,31). % must handle both GRP and FPR ranges
-define(RA, ?O7).
-define(ARG0, ?O1).
-define(ARG1, ?O2).
-define(ARG2, ?O3).
-define(ARG3, ?O4).
-define(ARG4, ?O5).
-define(ARG5, ?O0).
-define(TEMP1, ?I3). % stores RA around inc_stack calls, must be C calleE-save
-define(TEMP2, ?I4).
-define(TEMP3, ?I5).
-define(RETURN_VALUE, ?O0).
-define(HEAP_POINTER, ?I2).
-define(STACK_POINTER, ?I1).
-define(PROC_POINTER, ?I0).
reg_name_gpr(R) ->
case R of
?G0 -> "%g0";
?G1 -> "%g1";
?G2 -> "%g2";
?G3 -> "%g3";
?G4 -> "%g4";
?G5 -> "%g5";
?G6 -> "%g6";
?G7 -> "%g7";
?O0 -> "%o0";
?O1 -> "%o1";
?O2 -> "%o2";
?O3 -> "%o3";
?O4 -> "%o4";
?O5 -> "%o5";
?O6 -> "%sp";
?O7 -> "%o7";
?L0 -> "%l0";
?L1 -> "%l1";
?L2 -> "%l2";
?L3 -> "%l3";
?L4 -> "%l4";
?L5 -> "%l5";
?L6 -> "%l6";
?L7 -> "%l7";
?I0 -> "%i0";
?I1 -> "%i1";
?I2 -> "%i2";
?I3 -> "%i3";
?I4 -> "%i4";
?I5 -> "%i5";
?I6 -> "%fp";
?I7 -> "%i7";
%% to handle code before regalloc:
_ -> "%r" ++ integer_to_list(R)
end.
reg_name_fpr(R) -> [$f | integer_to_list(2*R)].
%%% Must handle both GPR and FPR ranges.
first_virtual() -> ?LAST_PRECOLOURED + 1.
%%% These two tests have the same implementation, but that's
%%% not something we should cast in stone in the interface.
is_precoloured_gpr(R) -> R =< ?LAST_PRECOLOURED.
is_precoloured_fpr(R) -> R =< ?LAST_PRECOLOURED.
all_precoloured() ->
%% <%g6, %g7, %o6, %i6> should be skipped as they are unused.
%% Unfortunately, gaps in the list of precoloured registers
%% cause the graph_color register allocator to create bogus
%% assignments for those "registers", which in turn causes
%% the "precoloured reg must map to itself" sanity check in
%% the frame module to signal errors.
[?G0, ?G1, ?G2, ?G3, ?G4, ?G5, ?G6, ?G7,
?O0, ?O1, ?O2, ?O3, ?O4, ?O5, ?O6, ?O7,
?L0, ?L1, ?L2, ?L3, ?L4, ?L5, ?L6, ?L7,
?I0, ?I1, ?I2, ?I3, ?I4, ?I5, ?I6, ?I7].
return_value() -> ?RETURN_VALUE.
temp1() -> ?TEMP1.
temp2() -> ?TEMP2.
temp3() -> ?TEMP3.
heap_pointer() -> ?HEAP_POINTER.
stack_pointer() -> ?STACK_POINTER.
proc_pointer() -> ?PROC_POINTER.
return_address() -> ?RA.
g0() -> ?G0.
allocatable_gpr() ->
%% %g0 is not writable
%% %g6, %g7, %o6, and %i6 are reserved for C
%% %i0, %i1, and %i2 are fixed global registers
%% %i4 may be used by the frame module for large load/store offsets
[ ?G1, ?G2, ?G3, ?G4, ?G5,
?O0, ?O1, ?O2, ?O3, ?O4, ?O5, ?O7,
?L0, ?L1, ?L2, ?L3, ?L4, ?L5, ?L6, ?L7,
?I3, ?I5, ?I7].
allocatable_fpr() ->
%% We expose 16 virtual fp regs, 0-15, corresponding to the
%% f0/f2/f4/.../f28/f30 double-precision hardware fp regs.
%% The mapping is done by reg_name_fpr/1 and the assembler.
%% We ignore f32/.../f60 since they cannot be used in loads
%% or stores for non 8-byte aligned addresses.
[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15].
%% Needed for hipe_graph_coloring_regalloc.
%% Presumably true for Reg in AllPrecoloured \ Allocatable.
is_fixed(Reg) ->
case Reg of
?HEAP_POINTER -> true;
?STACK_POINTER -> true;
?PROC_POINTER -> true;
%% The following cases are required for linear scan:
%% it gets confused if it sees a register which is
%% neither allocatable nor global (fixed or one of
%% the scratch registers set aside for linear scan).
?G0 -> true;
?G6 -> true;
?G7 -> true;
?O6 -> true;
?I6 -> true;
_ -> false
end.
nr_args() -> ?SPARC_NR_ARG_REGS.
args(Arity) when is_integer(Arity) ->
N = erlang:min(Arity, ?SPARC_NR_ARG_REGS),
args(N-1, []).
args(I, Rest) when is_integer(I), I < 0 -> Rest;
args(I, Rest) -> args(I-1, [arg(I) | Rest]).
arg(N) ->
if N < ?SPARC_NR_ARG_REGS ->
case N of
0 -> ?ARG0;
1 -> ?ARG1;
2 -> ?ARG2;
3 -> ?ARG3;
4 -> ?ARG4;
5 -> ?ARG5
end
end.
is_arg(R) ->
case R of
?ARG0 -> ?SPARC_NR_ARG_REGS > 0;
?ARG1 -> ?SPARC_NR_ARG_REGS > 1;
?ARG2 -> ?SPARC_NR_ARG_REGS > 2;
?ARG3 -> ?SPARC_NR_ARG_REGS > 3;
?ARG4 -> ?SPARC_NR_ARG_REGS > 4;
?ARG5 -> ?SPARC_NR_ARG_REGS > 5;
_ -> false
end.
call_clobbered() -> % does the RA strip the type or not?
[%% ?G0 is the non-allocatable constant zero
{?G1,tagged},{?G1,untagged},
{?G2,tagged},{?G2,untagged},
{?G3,tagged},{?G3,untagged},
{?G4,tagged},{?G4,untagged},
{?G5,tagged},{?G5,untagged},
%% ?G6 is reserved for C
%% ?G7 is reserved for C
{?O0,tagged},{?O0,untagged},
{?O1,tagged},{?O1,untagged},
{?O2,tagged},{?O2,untagged},
{?O3,tagged},{?O3,untagged},
{?O4,tagged},{?O4,untagged},
{?O5,tagged},{?O5,untagged},
%% ?O6 is reserved for C
{?O7,tagged},{?O7,untagged},
{?L0,tagged},{?L0,untagged},
{?L1,tagged},{?L1,untagged},
{?L2,tagged},{?L2,untagged},
{?L3,tagged},{?L3,untagged},
{?L4,tagged},{?L4,untagged},
{?L5,tagged},{?L5,untagged},
{?L6,tagged},{?L6,untagged},
{?L7,tagged},{?L7,untagged},
%% ?I0 is fixed (P)
%% ?I1 is fixed (NSP)
%% ?I2 is fixed (HP)
{?I3,tagged},{?I3,untagged},
{?I4,tagged},{?I4,untagged},
{?I5,tagged},{?I5,untagged},
%% ?I6 is reserved for C
{?I7,tagged},{?I7,untagged}
].
tailcall_clobbered() -> % tailcall crapola needs one temp
[{?TEMP1,tagged},{?TEMP1,untagged}
,{?RA,tagged},{?RA,untagged}
].
live_at_return() ->
[{?HEAP_POINTER,untagged},
{?STACK_POINTER,untagged},
{?PROC_POINTER,untagged}
].
|
