1 # python code-writer for OpenPOWER ISA pseudo-code parsing
7 from soc
.decoder
.pseudo
.pagereader
import ISA
8 from soc
.decoder
.power_pseudo
import convert_to_python
9 from soc
.decoder
.orderedset
import OrderedSet
10 from soc
.decoder
.isa
.caller
import create_args
13 fdir
= os
.path
.abspath(os
.path
.dirname(__file__
))
14 fdir
= os
.path
.split(fdir
)[0]
15 return os
.path
.join(fdir
, "isa")
19 # auto-generated by pywriter.py, do not edit or commit
21 from soc.decoder.isa.caller import inject, instruction_info
22 from soc.decoder.helpers import (EXTS, EXTS64, EXTZ64, ROTL64, ROTL32, MASK,
23 ne, eq, gt, ge, lt, le, length)
24 from soc.decoder.selectable_int import SelectableInt
25 from soc.decoder.selectable_int import selectconcat as concat
26 from soc.decoder.orderedset import OrderedSet
32 iinfo_template
= """instruction_info(func=%s,
34 uninit_regs=%s, write_regs=%s,
35 special_regs=%s, op_fields=%s,
39 class PyISAWriter(ISA
):
42 self
.pages_written
= []
44 def write_pysource(self
, pagename
):
45 self
.pages_written
.append(pagename
)
46 instrs
= isa
.page
[pagename
]
47 isadir
= get_isasrc_dir()
48 fname
= os
.path
.join(isadir
, "%s.py" % pagename
)
49 with
open(fname
, "w") as f
:
51 f
.write(header
% pagename
) # write out header
52 # go through all instructions
55 print (fname
, d
.opcode
)
56 pcode
= '\n'.join(d
.pcode
) + '\n'
58 pycode
, rused
= convert_to_python(pcode
, d
.form
)
59 # create list of arguments to call
60 regs
= list(rused
['read_regs']) + list(rused
['uninit_regs'])
61 regs
+= list(rused
['special_regs'])
62 args
= ', '.join(create_args(regs
, 'self'))
63 # create list of arguments to return
64 retargs
= ', '.join(create_args(rused
['write_regs']))
65 # write out function. pre-pend "op_" because some instrs are
66 # also python keywords (cmp). also replace "." with "_"
67 op_fname
="op_%s" % page
.replace(".", "_")
68 f
.write(" @inject()\n")
69 f
.write(" def %s(%s):\n" % (op_fname
, args
))
70 if 'NIA' in pycode
: # HACK - TODO fix
71 f
.write(" global NIA\n")
72 pycode
= pycode
.split("\n")
73 pycode
= '\n'.join(map(lambda x
: " %s" % x
, pycode
))
74 pycode
= pycode
.rstrip()
75 f
.write(pycode
+ '\n')
77 f
.write(" return (%s,)\n\n" % retargs
)
80 # accumulate the instruction info
81 ops
= repr(rused
['op_fields'])
82 iinfo
= iinfo_template
% (op_fname
, rused
['read_regs'],
85 rused
['special_regs'],
87 iinf
+= " %s_instrs['%s'] = %s\n" % (pagename
, page
, iinfo
)
88 # write out initialisation of info, for ISACaller to use
89 f
.write(" %s_instrs = {}\n" % pagename
)
92 def patch_if_needed(self
, source
):
93 isadir
= get_isasrc_dir()
94 fname
= os
.path
.join(isadir
, "%s.py" % source
)
95 patchname
= os
.path
.join(isadir
, "%s.patch" % source
)
98 with
open(patchname
, 'r') as patch
:
99 newfname
= fname
+ '.orig'
100 shutil
.copyfile(fname
, newfname
)
101 subprocess
.check_call(['patch', fname
],
107 def write_isa_class(self
):
108 isadir
= get_isasrc_dir()
109 fname
= os
.path
.join(isadir
, "all.py")
111 with
open(fname
, "w") as f
:
112 f
.write('from soc.decoder.isa.caller import ISACaller\n')
113 for page
in self
.pages_written
:
114 f
.write('from soc.decoder.isa.%s import %s\n' % (page
, page
))
117 classes
= ', '.join(['ISACaller'] + self
.pages_written
)
118 f
.write('class ISA(%s):\n' % classes
)
119 f
.write(' def __init__(self, dec, regs, sprs, cr):\n')
120 f
.write(' super().__init__(dec, regs, sprs, cr)\n')
121 f
.write(' self.instrs = {\n')
122 for page
in self
.pages_written
:
123 f
.write(' **self.%s_instrs,\n' % page
)
127 if __name__
== '__main__':
129 if len(sys
.argv
) == 1: # quick way to do it
131 sources
= isa
.page
.keys()
133 sources
= sys
.argv
[1:]
134 for source
in sources
:
135 isa
.write_pysource(source
)
136 isa
.patch_if_needed(source
)
137 isa
.write_isa_class()