610fb59fabf71e20efd0559c39cb5e5bed3c8787
1 from nmigen
import Module
, Signal
2 from nmigen
.sim
import Simulator
, Delay
, Settle
3 from nmutil
.formaltest
import FHDLTestCase
5 from openpower
.decoder
.isa
.caller
import ISACaller
6 from openpower
.decoder
.power_decoder
import (create_pdecode
)
7 from openpower
.decoder
.power_decoder2
import (PowerDecode2
)
8 from openpower
.simulator
.program
import Program
9 from openpower
.decoder
.isa
.caller
import ISACaller
, SVP64State
10 from openpower
.decoder
.selectable_int
import SelectableInt
11 from openpower
.decoder
.orderedset
import OrderedSet
12 from openpower
.decoder
.isa
.all
import ISA
13 from openpower
.decoder
.isa
.test_caller
import Register
, run_tst
14 from openpower
.sv
.trans
.svp64
import SVP64Asm
15 from openpower
.consts
import SVP64CROffs
16 from copy
import deepcopy
19 class DecoderTestCase(FHDLTestCase
):
21 def _check_regs(self
, sim
, expected
):
23 self
.assertEqual(sim
.gpr(i
), SelectableInt(expected
[i
], 64))
25 def test_sv_fpload(self
):
26 """>>> lst = ["sv.lfsx *2, 0, *0"
29 lst
= SVP64Asm(["sv.lfsx *2, 0, *0"
33 # SVSTATE (in this case, VL=2)
34 svstate
= SVP64State()
36 svstate
.maxvl
= 2 # MAXVL
37 print ("SVSTATE", bin(svstate
.asint()))
39 # memory addresses 0x0000 and 0x0008
40 initial_mem
= {0x0000: (0x42013333, 8), # 32.3
41 0x0008: (0xC0200000, 8), # -2.5
44 # and RB will move on from 0 for first iteration to 1 in 2nd
45 # therefore we must point GPR(0) at initial mem 0x0000
46 # and GPR(1) at initial mem 0x0008
47 initial_regs
= [0] * 32
48 initial_regs
[0] = 0x0000 # points at memory address 0x0000 (element 0)
49 initial_regs
[1] = 0x0008 # points at memory address 0x0008 (element 1)
51 with
Program(lst
, bigendian
=False) as program
:
52 sim
= self
.run_tst_program(program
, initial_regs
,
54 initial_mem
=initial_mem
)
57 self
.assertEqual(sim
.fpr(2), SelectableInt(0x4040266660000000, 64))
58 self
.assertEqual(sim
.fpr(3), SelectableInt(0xC004000000000000, 64))
60 def test_fp_single_ldst(self
):
61 """>>> lst = ["sv.lfsx *0, 0, *4", # load fp 1/2 from mem 0/8
62 "sv.stfsu *0, 16(*4)", # store fp 1/2, update RA *twice*
63 "sv.lfs *2, 0(*4)", # re-load from UPDATED r4/r5
66 This is quite an involved (deceptively simple looking) test.
67 The sv.stfsu is creating a *Vector* of Effective Addresses, and
68 consequently is updating (writing) a *Vector* of EAs into the GPR.
72 1) sv.lfsx *0, 0, *4 VL=2 so there are *two* lfsx operations
73 lfsx 0, 0, 4 loads from MEM[GPR(4)], stores in FPR(0)
74 lfsx 1, 0, 5 loads from MEM[GPR(5)], stores in FPR(1)
76 2) sv.stfsu *0, 16(*4) again, VL=2 so there are two ST-FP-update ops
77 stfsu 0, 16(4) EA=GPR(4)+16, FPR(0) to MEM[EA], EA to GPR(4)
78 stfsu 1, 16(5) EA=GPR(5)+16, FPR(0) to MEM[EA], EA to GPR(5)
80 note that there are **TWO** FP writes to memory, and **TWO**
81 writes of the calculated Effective Address to GPR, in regs 4 and 5
82 GPRs 4 and 5 are *overwritten*.
84 3) sv.lfs *3, 0(*4) VL=2, so two immediate-LDs
85 lfs 3, 0(4) EA=GPR(4)+0, FPR(3) = MEM[EA]
86 lfs 4, 0(5) EA=GPR(5)+0, FPR(4) = MEM[EA]
88 here we have loaded from the *overwritten* GPRs 4 and 5.
90 strictly speaking this unit test should also verify the contents
91 of the memory locations 0x10 and 0x18, which should contain the
92 single-precision FP numbers in the bottom 4 bytes. TODO
94 lst
= SVP64Asm(["sv.lfsx *0, 0, *4",
95 "sv.stfsu *0, 16(*4)",
100 # SVSTATE (in this case, VL=2)
101 svstate
= SVP64State()
103 svstate
.maxvl
= 2 # MAXVL
104 print ("SVSTATE", bin(svstate
.asint()))
106 # memory addresses 0x0000 and 0x0008
107 initial_mem
= {0x0000: (0x42013333, 8), # 32.3
108 0x0008: (0xC0200000, 8), # -2.5
109 0x0020: (0x1828384822324252, 8),
112 # and RB will move on from 0 for first iteration to 1 in 2nd
113 # therefore we must point GPR(4) at initial mem 0x0000
114 # and GPR(5) at initial mem 0x0008
115 initial_regs
= [0] * 32
116 initial_regs
[4] = 0x0000 # points at memory address 0x0000 (element 0)
117 initial_regs
[5] = 0x0008 # points at memory address 0x0008 (element 1)
119 with
Program(lst
, bigendian
=False) as program
:
120 sim
= self
.run_tst_program(program
, initial_regs
,
122 initial_mem
=initial_mem
)
123 print("FPR 1", sim
.fpr(0))
124 print("FPR 2", sim
.fpr(1))
125 print("GPR 1", sim
.gpr(4)) # should be 0x10 due to update
126 print("GPR 2", sim
.gpr(5)) # should be 0x18 due to update
127 self
.assertEqual(sim
.gpr(4), SelectableInt(0x10, 64))
128 self
.assertEqual(sim
.gpr(5), SelectableInt(0x18, 64))
129 self
.assertEqual(sim
.fpr(0), SelectableInt(0x4040266660000000, 64))
130 self
.assertEqual(sim
.fpr(1), SelectableInt(0xC004000000000000, 64))
131 self
.assertEqual(sim
.fpr(2), SelectableInt(0x4040266660000000, 64))
132 self
.assertEqual(sim
.fpr(3), SelectableInt(0xC004000000000000, 64))
134 def test_sv_fpadd(self
):
135 """>>> lst = ["sv.fadds *6, *2, *4"
138 lst
= SVP64Asm(["sv.fadds *6, *2, *4"
143 fprs
[2] = 0xC040266660000000 # -32.3
144 fprs
[3] = 0xC040266660000000 # -32.3
145 fprs
[4] = 0x4040266660000000 # +32.3
146 fprs
[5] = 0xC040266660000000 # -32.3
148 # SVSTATE (in this case, VL=2)
149 svstate
= SVP64State()
151 svstate
.maxvl
= 2 # MAXVL
152 print ("SVSTATE", bin(svstate
.asint()))
154 with
Program(lst
, bigendian
=False) as program
:
155 sim
= self
.run_tst_program(program
, svstate
=svstate
,
157 self
.assertEqual(sim
.fpr(6), SelectableInt(0x0, 64))
158 self
.assertEqual(sim
.fpr(7), SelectableInt(0xc050266660000000, 64))
160 def test_sv_fpmadds(self
):
161 """>>> lst = ["sv.fmadds *6, *2, *4, 8"
163 two vector mul-adds with a scalar in f8
164 * fp6 = fp2 * fp4 + f8 = 7.0 * 2.0 - 2.0 = 12.0
165 * fp7 = fp3 * fp5 + f8 = 7.0 * 2.0 - 2.0 = 12.0
167 lst
= SVP64Asm(["sv.fmadds *6, *2, *4, 8"
172 fprs
[2] = 0x401C000000000000 # 7.0
173 fprs
[3] = 0xC02399999999999A # -9.8
174 fprs
[4] = 0x4000000000000000 # 2.0
175 fprs
[5] = 0xC040266660000000 # -32.3
176 fprs
[6] = 0x4000000000000000 # 2.0
177 fprs
[7] = 0x4000000000000000 # 2.0
178 fprs
[8] = 0xc000000000000000 # -2.0
180 # SVSTATE (in this case, VL=2)
181 svstate
= SVP64State()
183 svstate
.maxvl
= 2 # MAXVL
184 print ("SVSTATE", bin(svstate
.asint()))
186 with
Program(lst
, bigendian
=False) as program
:
187 sim
= self
.run_tst_program(program
, svstate
=svstate
,
189 self
.assertEqual(sim
.fpr(6), SelectableInt(0x4028000000000000, 64))
190 self
.assertEqual(sim
.fpr(7), SelectableInt(0x4073a8a3c0000000, 64))
192 def run_tst_program(self
, prog
, initial_regs
=None,
196 if initial_regs
is None:
197 initial_regs
= [0] * 32
198 simulator
= run_tst(prog
, initial_regs
, mem
=initial_mem
,
199 initial_fprs
=initial_fprs
,
210 if __name__
== "__main__":