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
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
|
{
This file is part of the Free Pascal run time library.
Copyright (c) 2017 by the Free Pascal development team.
Processor dependent implementation for the system unit for
Z80
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
var
z80_save_hl: Word; public name 'FPC_Z80_SAVE_HL';
procedure fpc_cpuinit;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
end;
{$define FPC_SYSTEM_HAS_MOVE}
procedure Move(const source;var dest;count:SizeInt);assembler;[public, alias: 'FPC_MOVE'];
label
skip, forward_move;
asm
ld c, (count)
ld b, (count+1)
bit 7, b
jp NZ, skip
ld a, b
or a, c
jp Z, skip
ld l, (source)
ld h, (source+1)
ld e, (dest)
ld d, (dest+1)
ld a, d
cp a, h
jp C, forward_move
ld a, e
cp a, l
jp C, forward_move
{ backward move }
add hl, bc
dec hl
ex de, hl
add hl, bc
dec hl
ex de, hl
lddr
jp skip
forward_move:
ldir
skip:
end;
{$define FPC_SYSTEM_HAS_FILLCHAR}
Procedure FillChar(var x;count:SizeInt;value:byte);assembler;
label
skip, loop;
asm
ld c, (count)
ld b, (count+1)
bit 7, b
jp NZ, skip
ld a, b
or a, c
jp Z, skip
ld e, (value)
ld a, 0
ld l, (x)
ld h, (x+1)
loop:
ld (hl), e
inc hl
dec bc
cp a, c
jp NZ, loop
cp a, b
jp NZ, loop
skip:
end;
{$IFNDEF INTERNAL_BACKTRACE}
{$define FPC_SYSTEM_HAS_GET_FRAME}
function get_frame:pointer;assembler;nostackframe;
asm
push ix
pop hl
end;
{$ENDIF not INTERNAL_BACKTRACE}
{$define FPC_SYSTEM_HAS_GET_CALLER_ADDR}
function get_caller_addr(framebp:pointer;addr:pointer=nil):pointer;assembler;
label
framebp_null;
asm
ld l, (framebp)
ld h, (framebp+1)
ld a, l
or a, h
jp Z, framebp_null
inc hl
inc hl
ld e, (hl)
inc hl
ld d, (hl)
ex de, hl
framebp_null:
end;
{$define FPC_SYSTEM_HAS_GET_CALLER_FRAME}
function get_caller_frame(framebp:pointer;addr:pointer=nil):pointer;assembler;
label
framebp_null;
asm
ld l, (framebp)
ld h, (framebp+1)
ld a, l
or a, h
jp Z, framebp_null
ld e, (hl)
inc hl
ld d, (hl)
ex de, hl
framebp_null:
end;
{$define FPC_SYSTEM_HAS_SPTR}
Function Sptr : pointer;assembler;nostackframe;
asm
ld hl, 0
add hl, sp
end;
function InterLockedDecrement (var Target: longint) : longint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
dec(Target);
Result:=Target;
{ release interrupts }
asm
ei
end;
end;
function InterLockedIncrement (var Target: longint) : longint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
inc(Target);
Result:=Target;
{ release interrupts }
asm
ei
end;
end;
function InterLockedExchange (var Target: longint;Source : longint) : longint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
Result:=Target;
Target:=Source;
{ release interrupts }
asm
ei
end;
end;
function InterlockedCompareExchange(var Target: longint; NewValue: longint; Comperand: longint): longint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
Result:=Target;
if Target=Comperand then
Target:=NewValue;
{ release interrupts }
asm
ei
end;
end;
function InterLockedExchangeAdd (var Target: longint;Source : longint) : longint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
Result:=Target;
inc(Target,Source);
{ release interrupts }
asm
ei
end;
end;
function InterLockedDecrement (var Target: smallint) : smallint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
dec(Target);
Result:=Target;
{ release interrupts }
asm
ei
end;
end;
function InterLockedIncrement (var Target: smallint) : smallint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
inc(Target);
Result:=Target;
{ release interrupts }
asm
ei
end;
end;
function InterLockedExchange (var Target: smallint;Source : smallint) : smallint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
Result:=Target;
Target:=Source;
{ release interrupts }
asm
ei
end;
end;
function InterlockedCompareExchange(var Target: smallint; NewValue: smallint; Comperand: smallint): smallint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
Result:=Target;
if Target=Comperand then
Target:=NewValue;
{ release interrupts }
asm
ei
end;
end;
function InterLockedExchangeAdd (var Target: smallint;Source : smallint) : smallint;
var
temp_sreg : byte;
begin
{ block interrupts }
asm
di
end;
Result:=Target;
inc(Target,Source);
{ release interrupts }
asm
ei
end;
end;
|