-
Notifications
You must be signed in to change notification settings - Fork 2
Expand file tree
/
Copy pathshifter_unit.py
More file actions
executable file
·251 lines (221 loc) · 9.07 KB
/
shifter_unit.py
File metadata and controls
executable file
·251 lines (221 loc) · 9.07 KB
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
from block import Block
from data import Data
class ShifterUnit(Block):
"""
Inputs:
- SH_LATCH - příprava na použití shifteru
- otevře vnitřní registr pro data z RB0
- S nástupnou hranou uloží
- SH_LOAD - Povolí posouvání
- RF_STORE - neimplementujeme
- PCE - pro reset když se posouvá PC
- Data_in - vstupní data z RB0
- Instrukce - z ní vytežení funct3 pro nastavení chování shifteru
- I - Aritmetický / logický posuv
- RS2 - Prvních 5 bitů z multiplexoru - určuje o kolik se data posunou
- RST
Outputs:
- SH_BUSY = CPU_BUSY
- pozastavení microcounteru při shiftování
- OUT - datový výstup
- SH_RTB_EN - Blokování dekodéru v Control unit
POZOR: Hazardní stav při posuvu nulou !!!
"""
def __init__(self, data: Data) -> None:
super().__init__(data)
self.latched_value = 0
# Definování konstant
self.SH_LEFT = 0
self.SH_RIGHT = 1
self.SH_BUSY = 2
self.OUT_EN = 3
self.SH_STR_EN = 4
self.f3 = 0b000
self.rs2 = 0b000000
self.ctr = 0b000000
self.sh_load = 0b0
self.i = 0
self.internal_register = 0
self.input_data = 0
def clock_up(self):
if self.data.SH_LOAD or self.data.SH_LATCH:
self.get_init_data()
address_to_eeprom = self.f3 | (self.rs2 << 3) | (self.ctr << 8) | (self.data.SH_LOAD << 14)
what_to_do = self.generate(bin(address_to_eeprom)[2:].zfill(17))
if self.data.SH_LATCH == 1:
# logger.info(f"SH latch, {self.internal_register=}")
self.internal_register = self.input_data
if (what_to_do >> self.SH_LEFT) & 1 == 1:
if (what_to_do >> self.SH_STR_EN) & 1 == 1:
self.internal_register = (self.internal_register << 1) & 0xffffffff
# logger.info(f"shift to left by one > ({bin(self.internal_register)})")
elif (what_to_do >> self.SH_RIGHT) & 1 == 1:
if (what_to_do >> self.SH_STR_EN) & 1 == 1:
if self.i == 0:
self.internal_register = (self.internal_register >> 1) & 0xffffffff
# logger.info(f"shift to right by one > ({bin(self.internal_register)})")
elif self.i == 1:
if self.internal_register & 2 ** 31 != 0:
# logger.info("MSB detected")
self.internal_register = ((self.internal_register >> 1) | (1 << 31)) & 0xffffffff
else:
self.internal_register = (self.internal_register >> 1) & 0xffffffff
# logger.info(f"shift to right by one > ({bin(self.internal_register)})")
if (what_to_do >> self.SH_BUSY) & 1 == 1:
# logger.info("CPU BUSY")
self.data.CPU_BUSY = 1
if (what_to_do >> self.OUT_EN) & 1 == 1:
# logger.info(f"HOTOVO: výsledná hodnota je: {self.internal_register}")
self.data.SH_RTB_EN = 0
self.data.CPU_BUSY = 0
self.data.write_back = self.internal_register
self.data.REG_RTB_G = 1
self.data.IMM_RTB_G = 1
self.data.PC_RTB_G = 1
def clock_down(self):
if self.data.SH_LOAD or self.data.SH_LATCH:
self.get_init_data()
address_to_eeprom = self.f3 | (self.rs2 << 3) | (self.ctr << 8) | (self.data.SH_LOAD << 14)
what_to_do = self.generate(str(bin(address_to_eeprom)[2:]).zfill(17))
# if self.data.pulse_count == 142:
# logger.info(f"{what_to_do=}, {self.ctr=}, {self.f3=}, {self.rs2=}")
if self.data.SH_LOAD and self.ctr == 0:
self.ctr = 1
# logger.info(f"Initial SH load, counter +1 {self.ctr=}")
elif (what_to_do >> self.SH_BUSY) & 1 == 1 and self.data.SH_LOAD == 1 and (
what_to_do >> self.OUT_EN) & 1 == 0:
self.ctr += 1
# logger.info(f"internal counter = {self.ctr=}")
if self.data.PCE == 1:
# logger.info("resseting shifter")
self.data.SH_RTB_EN = 1
self.ctr = 0
def get_init_data(self):
prepared_instruction = bin(self.data.instruction)[2:].zfill(32)
self.f3 = int(prepared_instruction[17:20], 2)
self.i = int(prepared_instruction[1], 2)
self.rs2 = int(self.data.mux_out) & 0b11111
self.input_data = int(self.data.read_register_1)
def generate(self, input):
_L = int(input[2], 2)
_CTR = int(input[3:9], 2)
_RS2 = int(input[9:14], 2)
_F3 = int(input[14:17], 2)
out = 0
# VERZE 6.1
if _L == 1:
if _F3 == 1: # SLL
if _RS2 == 0: # posun o nulu
out |= 1 << self.OUT_EN
# elif _RS2 == 1 and _CTR == 2: # posun o jednicku -> problematický 0. krok
# out |= 1 << SH_LEFT | 1 << SH_BUSY | 1 << SH_STR_EN
# elif _RS2 == 1 and _CTR == 3: # posun o jednicku -> problematický 1. krok
# out |= 1 << OUT_EN
elif _RS2 == (_CTR - 2):
out |= 1 << self.OUT_EN
else:
if _CTR > 1:
out |= 1 << self.SH_STR_EN
out |= 1 << self.SH_LEFT | 1 << self.SH_BUSY
if _F3 == 5: # SR (A or L)
if _RS2 == 0: # posun o nulu
out |= 1 << self.OUT_EN
elif _RS2 == (_CTR - 2):
out |= 1 << self.OUT_EN
else:
if _CTR > 1:
out |= 1 << self.SH_STR_EN
out |= 1 << self.SH_RIGHT | 1 << self.SH_BUSY
return out
# if __name__ == "__main__":
# # 0 000000 00000 000
# # L CTR RS2 F3
# # adress = 0b1_000001_00001_101
#
# input_data = 0b00000000000000000000000000000001
#
# f3 = 0b001
# rs2 = 0b000011
# ctr = 0b000000
# sh_load = 0b0
# i = 0
#
# address_to_eeprom = f3 | (rs2 << 3) | (ctr << 8) | (sh_load << 14)
#
# clk = 0
# internal_register = 0
# out_en = 0
#
# # logger.info(generate(str(bin(address_to_eeprom)[2:]).zfill(17))[2:])
#
# clk = 0
# # logger.info(f"clock is: 0 (down) - sh_latch aktivní")
# # sh_latch = 1
#
# clk = 1
# # logger.info(f"clock is: 1 (up) - zápis do vnitřního registru")
# internal_register = input_data
#
# clk = 0
# # logger.info(f"clock is: 0 (down) - vypnutí sh_latch a zapnutí sh_load")
# sh_load = 1
# ctr += 1
# address_to_eeprom = f3 | (rs2 << 3) | (ctr << 8) | (sh_load << 14)
# what_to_do = generate(str(bin(address_to_eeprom)[2:]).zfill(17))
# # logger.info(f"What to do = {hex(what_to_do)}")
#
#
# for loop in range(40):
# clk = 1
# # logger.info(f"clock is: 1 (up)")
#
# if (what_to_do >> SH_LEFT) & 1 == 1:
# if (what_to_do >> SH_STR_EN) & 1 == 1:
# internal_register = (internal_register << 1) & 0xffffffff
# # logger.info(f"shift to left by one > ({bin(internal_register)})")
#
# if (what_to_do >> SH_RIGHT) & 1 == 1:
# if (what_to_do >> SH_STR_EN) & 1 == 1:
# if i == 0:
# internal_register = (internal_register >> 1) & 0xffffffff
# # logger.info(f"shift to right by one > ({bin(internal_register)})")
#
# elif i == 1:
# if internal_register & 2**31 != 0:
# # logger.info("MSB detected")
# internal_register = ((internal_register >> 1) | (1 << 31)) & 0xffffffff
# else:
# internal_register = (internal_register >> 1) & 0xffffffff
#
# # logger.info(f"shift to right by one > ({bin(internal_register)})")
#
#
# if (what_to_do >> SH_BUSY) & 1 == 1:
# # logger.info("CPU BUSY")
#
# if (what_to_do >> OUT_EN) & 1 == 1:
# # logger.info(f"HOTOVO: výsledná hodnota je: {internal_register}")
#
# address_to_eeprom = f3 | (rs2 << 3) | (ctr << 8) | (sh_load << 14)
# what_to_do = generate(str(bin(address_to_eeprom)[2:]).zfill(17))
# # logger.info(f"What to do = {hex(what_to_do)}")
#
# input()
#
# # -------------------------------------------------------
#
#
# clk = 0
# # logger.info(f"clock is: 0 (down)")
#
#
# if (what_to_do >> SH_BUSY) & 1 == 1 and sh_load == 1 and out_en == 0:
# ctr += 1
# # logger.info(f"internal counter = {ctr}")
#
#
# address_to_eeprom = f3 | (rs2 << 3) | (ctr << 8) | (sh_load << 14)
# what_to_do = generate(str(bin(address_to_eeprom)[2:]).zfill(17))
# # logger.info(f"What to do = {hex(what_to_do)}")
#
# input()