1 # python code-writer for OpenPOWER ISA pseudo-code parsing
7 from openpower
.decoder
.pseudo
.pagereader
import ISA
8 from openpower
.decoder
.power_pseudo
import convert_to_python
9 from openpower
.decoder
.orderedset
import OrderedSet
10 from openpower
.decoder
.isa
.caller
import create_args
14 fdir
= os
.path
.abspath(os
.path
.dirname(__file__
))
15 fdir
= os
.path
.split(fdir
)[0]
16 return os
.path
.join(fdir
, "isa")
20 # auto-generated by pywriter.py, do not edit or commit
22 from openpower.decoder.isa.caller import inject, instruction_info
23 from openpower.decoder.helpers import (EXTS, EXTS64, EXTZ64, ROTL64, ROTL32,
25 ne, eq, gt, ge, lt, le, ltu, gtu, length,
26 trunc_divs, trunc_rems, MULS, DIVS, MODS,
30 from openpower.decoder.selectable_int import SelectableInt
31 from openpower.decoder.selectable_int import selectconcat as concat
32 from openpower.decoder.orderedset import OrderedSet
37 from openpower.decoder.helpers import (
39 FPADD32, FPSUB32, FPMUL32, FPDIV32,
40 FPADD64, FPSUB64, FPMUL64, FPDIV64,
44 from openpower.decoder.isafunctions.fpfromint import INT2FP
45 from openpower.decoder.isafunctions.double2single import DOUBLE
46 from openpower.decoder.isafunctions.bcd import BCD_TO_DPD, DPD_TO_BCD
51 iinfo_template
= """instruction_info(func=%s,
53 uninit_regs=%s, write_regs=%s,
54 special_regs=%s, op_fields=%s,
59 class PyISAWriter(ISA
):
62 self
.pages_written
= []
64 def write_pysource(self
, pagename
):
65 self
.pages_written
.append(pagename
)
66 instrs
= self
.page
[pagename
]
67 isadir
= get_isasrc_dir()
68 fname
= os
.path
.join(isadir
, "%s.py" % pagename
)
69 with
open(fname
, "w") as f
:
71 # write headers: FP gets extra imports
72 f
.write(header
) # write out header
73 if (pagename
.startswith("fp") or
74 pagename
.startswith("svfp")):
76 f
.write("class %s:\n" % pagename
)
78 # go through all instructions
81 print("page", pagename
, page
, fname
, d
.opcode
)
82 pcode
= '\n'.join(d
.pcode
) + '\n'
84 incl_carry
= pagename
== 'fixedshift'
85 pycode
, rused
= convert_to_python(pcode
, d
.form
, incl_carry
)
86 # create list of arguments to call
87 regs
= list(rused
['read_regs']) + list(rused
['uninit_regs'])
88 regs
+= list(rused
['special_regs'])
89 args
= ', '.join(create_args(regs
, 'self'))
90 # create list of arguments to return
91 retargs
= ', '.join(create_args(rused
['write_regs']))
92 # write out function. pre-pend "op_" because some instrs are
93 # also python keywords (cmp). also replace "." with "_"
94 op_fname
= "op_%s" % page
.replace(".", "_")
95 f
.write(" @inject()\n")
96 f
.write(" def %s(%s):\n" % (op_fname
, args
))
97 if 'NIA' in pycode
: # HACK - TODO fix
98 f
.write(" global NIA\n")
99 pycode
= pycode
.split("\n")
100 pycode
= '\n'.join(map(lambda x
: " %s" % x
, pycode
))
101 pycode
= pycode
.rstrip()
102 f
.write(pycode
+ '\n')
104 f
.write(" return (%s,)\n\n" % retargs
)
107 # accumulate the instruction info
108 ops
= repr(rused
['op_fields'])
109 iinfo
= iinfo_template
% (op_fname
, rused
['read_regs'],
110 rused
['uninit_regs'],
112 rused
['special_regs'],
114 iinf
+= " %s_instrs['%s'] = %s\n" % (pagename
, page
, iinfo
)
115 # write out initialisation of info, for ISACaller to use
116 f
.write(" %s_instrs = {}\n" % pagename
)
119 def patch_if_needed(self
, source
):
120 isadir
= get_isasrc_dir()
121 fname
= os
.path
.join(isadir
, "%s.py" % source
)
122 patchname
= os
.path
.join(isadir
, "%s.patch" % source
)
125 with
open(patchname
, 'r') as patch
:
126 newfname
= fname
+ '.orig'
127 shutil
.copyfile(fname
, newfname
)
128 subprocess
.check_call(['patch', fname
],
133 def write_isa_class(self
):
134 isadir
= get_isasrc_dir()
135 fname
= os
.path
.join(isadir
, "all.py")
137 with
open(fname
, "w") as f
:
138 f
.write('# auto-generated by pywriter.py: do not edit or commit\n')
139 f
.write('from openpower.decoder.isa.caller import ISACaller\n')
140 for page
in self
.pages_written
:
141 f
.write('from openpower.decoder.isa.%s ' \
142 'import %s\n' % (page
, page
))
145 classes
= ', '.join(['ISACaller'] + self
.pages_written
)
146 f
.write('class ISA(%s):\n' % classes
)
147 f
.write(' def __init__(self, *args, **kwargs):\n')
148 f
.write(' super().__init__(*args, **kwargs)\n')
149 f
.write(' self.instrs = {\n')
150 for page
in self
.pages_written
:
151 f
.write(' **self.%s_instrs,\n' % page
)
157 write_isa_class
= True
158 if len(sys
.argv
) == 1: # quick way to do it
160 sources
= isa
.page
.keys()
162 sources
= sys
.argv
[1:]
163 if sources
[0] == "noall": # don't rewrite all.py
164 write_isa_class
= False
166 print ("sources", write_isa_class
, sources
)
167 for source
in sources
:
168 isa
.write_pysource(source
)
169 isa
.patch_if_needed(source
)
171 isa
.write_isa_class()
173 if __name__
== '__main__':