From 8a46cfda4607151689580eccccb2642264585443 Mon Sep 17 00:00:00 2001
From: "Pavel I. Kryukov" <kryukov@frtk.ru>
Date: Mon, 19 Nov 2018 12:29:00 +0300
Subject: Modernize to Python 3 (#22)

---
 parse-opcodes | 225 +++++++++++++++++++++++++++++-----------------------------
 1 file changed, 114 insertions(+), 111 deletions(-)

diff --git a/parse-opcodes b/parse-opcodes
index 6ad06f1..510450b 100755
--- a/parse-opcodes
+++ b/parse-opcodes
@@ -1,5 +1,8 @@
 #!/usr/bin/env python
 
+from __future__ import print_function
+from builtins import hex
+from builtins import range
 import math
 import sys
 import tokenize
@@ -289,34 +292,34 @@ def binary(n, digits=0):
   return rep if digits == 0 else ('0' * (digits - len(rep))) + rep
 
 def make_c(match,mask):
-  print '/* Automatically generated by parse-opcodes.  */'
-  print '#ifndef RISCV_ENCODING_H'
-  print '#define RISCV_ENCODING_H'
+  print('/* Automatically generated by parse-opcodes.  */')
+  print('#ifndef RISCV_ENCODING_H')
+  print('#define RISCV_ENCODING_H')
   for name in namelist:
     name2 = name.upper().replace('.','_')
-    print '#define MATCH_%s %s' % (name2, hex(match[name]))
-    print '#define MASK_%s  %s' % (name2, hex(mask[name]))
+    print('#define MATCH_%s %s' % (name2, hex(match[name])))
+    print('#define MASK_%s  %s' % (name2, hex(mask[name])))
   for num, name in csrs+csrs32:
-    print '#define CSR_%s %s' % (name.upper(), hex(num))
+    print('#define CSR_%s %s' % (name.upper(), hex(num)))
   for num, name in causes:
-    print '#define CAUSE_%s %s' % (name.upper().replace(' ', '_'), hex(num))
-  print '#endif'
+    print('#define CAUSE_%s %s' % (name.upper().replace(' ', '_'), hex(num)))
+  print('#endif')
 
-  print '#ifdef DECLARE_INSN'
+  print('#ifdef DECLARE_INSN')
   for name in namelist:
     name2 = name.replace('.','_')
-    print 'DECLARE_INSN(%s, MATCH_%s, MASK_%s)' % (name2, name2.upper(), name2.upper())
-  print '#endif'
+    print('DECLARE_INSN(%s, MATCH_%s, MASK_%s)' % (name2, name2.upper(), name2.upper()))
+  print('#endif')
 
-  print '#ifdef DECLARE_CSR'
+  print('#ifdef DECLARE_CSR')
   for num, name in csrs+csrs32:
-    print 'DECLARE_CSR(%s, CSR_%s)' % (name, name.upper())
-  print '#endif'
+    print('DECLARE_CSR(%s, CSR_%s)' % (name, name.upper()))
+  print('#endif')
 
-  print '#ifdef DECLARE_CAUSE'
+  print('#ifdef DECLARE_CAUSE')
   for num, name in causes:
-    print 'DECLARE_CAUSE("%s", CAUSE_%s)' % (name, name.upper().replace(' ', '_'))
-  print '#endif'
+    print('DECLARE_CAUSE("%s", CAUSE_%s)' % (name, name.upper().replace(' ', '_')))
+  print('#endif')
 
 def yank(num,start,len):
   return (num >> start) & ((1 << len) - 1)
@@ -333,7 +336,7 @@ def str_inst(name,arguments):
   return name.replace('.rv32','').upper()
 
 def print_unimp_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{10}{|c|}{%s} & %s \\\\
 \\cline{2-11}
@@ -341,10 +344,10 @@ def print_unimp_type(name,match,arguments):
   ( \
     '0'*32, \
     'UNIMP' \
-  )
+  ))
 
 def print_u_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{8}{|c|}{%s} &
 \\multicolumn{1}{c|}{%s} &
@@ -356,10 +359,10 @@ def print_u_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_uj_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{8}{|c|}{%s} &
 \\multicolumn{1}{c|}{%s} &
@@ -371,10 +374,10 @@ def print_uj_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_s_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{4}{|c|}{%s} &
 \\multicolumn{2}{c|}{%s} &
@@ -392,10 +395,10 @@ def print_s_type(name,match,arguments):
     str_arg('imm12lo','imm[4:0]',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_sb_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{4}{|c|}{%s} &
 \\multicolumn{2}{c|}{%s} &
@@ -413,10 +416,10 @@ def print_sb_type(name,match,arguments):
     str_arg('bimm12lo','imm[4:1$\\vert$11]',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_i_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{6}{|c|}{%s} &
 \\multicolumn{1}{c|}{%s} &
@@ -432,10 +435,10 @@ def print_i_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_csr_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{6}{|c|}{%s} &
 \\multicolumn{1}{c|}{%s} &
@@ -451,10 +454,10 @@ def print_csr_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_ish_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{3}{|c|}{%s} &
 \\multicolumn{3}{c|}{%s} &
@@ -472,10 +475,10 @@ def print_ish_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_ishw_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{4}{|c|}{%s} &
 \\multicolumn{2}{c|}{%s} &
@@ -493,10 +496,10 @@ def print_ishw_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_r_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{4}{|c|}{%s} &
 \\multicolumn{2}{c|}{%s} &
@@ -514,10 +517,10 @@ def print_r_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_r4_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{2}{|c|}{%s} &
 \\multicolumn{2}{c|}{%s} &
@@ -537,10 +540,10 @@ def print_r4_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_amo_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{2}{|c|}{%s} &
 \\multicolumn{1}{c|}{aq} &
@@ -560,10 +563,10 @@ def print_amo_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_fence_type(name,match,arguments):
-  print """
+  print("""
 &
 \\multicolumn{2}{|c|}{%s} &
 \\multicolumn{3}{c|}{%s} &
@@ -583,10 +586,10 @@ def print_fence_type(name,match,arguments):
     str_arg('rd','',match,arguments), \
     binary(yank(match,opcode_base,opcode_size),opcode_size), \
     str_inst(name,arguments) \
-  )
+  ))
 
 def print_header(*types):
-  print """
+  print("""
 \\newpage
 
 \\begin{table}[p]
@@ -606,9 +609,9 @@ def print_header(*types):
 \\instbitrange{11}{7} &
 \\instbitrange{6}{0} \\\\
 \\cline{2-11}
-"""
+""")
   if 'r' in types:
-    print """
+    print("""
 &
 \\multicolumn{4}{|c|}{funct7} &
 \\multicolumn{2}{c|}{rs2} &
@@ -617,9 +620,9 @@ def print_header(*types):
 \\multicolumn{1}{c|}{rd} &
 \\multicolumn{1}{c|}{opcode} & R-type \\\\
 \\cline{2-11}
-"""
+""")
   if 'r4' in types:
-    print """
+    print("""
 &
 \\multicolumn{2}{|c|}{rs3} &
 \\multicolumn{2}{c|}{funct2} &
@@ -629,9 +632,9 @@ def print_header(*types):
 \\multicolumn{1}{c|}{rd} &
 \\multicolumn{1}{c|}{opcode} & R4-type \\\\
 \\cline{2-11}
-  """
+  """)
   if 'i' in types:
-    print """
+    print("""
 &
 \\multicolumn{6}{|c|}{imm[11:0]} &
 \\multicolumn{1}{c|}{rs1} &
@@ -639,9 +642,9 @@ def print_header(*types):
 \\multicolumn{1}{c|}{rd} &
 \\multicolumn{1}{c|}{opcode} & I-type \\\\
 \\cline{2-11}
-"""
+""")
   if 's' in types:
-    print """
+    print("""
 &
 \\multicolumn{4}{|c|}{imm[11:5]} &
 \\multicolumn{2}{c|}{rs2} &
@@ -650,9 +653,9 @@ def print_header(*types):
 \\multicolumn{1}{c|}{imm[4:0]} &
 \\multicolumn{1}{c|}{opcode} & S-type \\\\
 \\cline{2-11}
-"""
+""")
   if 'sb' in types:
-    print """
+    print("""
 &
 \\multicolumn{4}{|c|}{imm[12$\\vert$10:5]} &
 \\multicolumn{2}{c|}{rs2} &
@@ -661,42 +664,42 @@ def print_header(*types):
 \\multicolumn{1}{c|}{imm[4:1$\\vert$11]} &
 \\multicolumn{1}{c|}{opcode} & B-type \\\\
 \\cline{2-11}
-"""
+""")
   if 'u' in types:
-    print """
+    print("""
 &
 \\multicolumn{8}{|c|}{imm[31:12]} &
 \\multicolumn{1}{c|}{rd} &
 \\multicolumn{1}{c|}{opcode} & U-type \\\\
 \\cline{2-11}
-"""
+""")
   if 'uj' in types:
-    print """
+    print("""
 &
 \\multicolumn{8}{|c|}{imm[20$\\vert$10:1$\\vert$11$\\vert$19:12]} &
 \\multicolumn{1}{c|}{rd} &
 \\multicolumn{1}{c|}{opcode} & J-type \\\\
 \\cline{2-11}
-"""
+""")
 
 def print_subtitle(title):
-  print """
+  print("""
 &
 \\multicolumn{10}{c}{} & \\\\
 &
 \\multicolumn{10}{c}{\\bf %s} & \\\\
 \\cline{2-11}
-  """ % title
+  """ % title)
 
 def print_footer(caption=''):
-  print """
+  print("""
 \\end{tabular}
 \\end{center}
 \\end{small}
 %s
 \\label{instr-table}
 \\end{table}
-  """ % caption
+  """ % caption)
 
 def print_inst(n):
   if n == 'fence':
@@ -819,40 +822,40 @@ def print_chisel_insn(name):
       s = '%s%d' % (s, yank(match[name], i, 1))
     else:
       s = s + '?'
-  print s + "\")"
+  print(s + "\")")
 
 def make_chisel():
-  print '/* Automatically generated by parse-opcodes */'
-  print 'object Instructions {'
+  print('/* Automatically generated by parse-opcodes */')
+  print('object Instructions {')
   for name in namelist:
     print_chisel_insn(name)
-  print '}'
-  print 'object Causes {'
+  print('}')
+  print('object Causes {')
   for num, name in causes:
-    print '  val %s = %s' % (name.lower().replace(' ', '_'), hex(num))
-  print '  val all = {'
-  print '    val res = collection.mutable.ArrayBuffer[Int]()'
+    print('  val %s = %s' % (name.lower().replace(' ', '_'), hex(num)))
+  print('  val all = {')
+  print('    val res = collection.mutable.ArrayBuffer[Int]()')
   for num, name in causes:
-    print '    res += %s' % (name.lower().replace(' ', '_'))
-  print '    res.toArray'
-  print '  }'
-  print '}'
-  print 'object CSRs {'
+    print('    res += %s' % (name.lower().replace(' ', '_')))
+  print('    res.toArray')
+  print('  }')
+  print('}')
+  print('object CSRs {')
   for num, name in csrs+csrs32:
-    print '  val %s = %s' % (name, hex(num))
-  print '  val all = {'
-  print '    val res = collection.mutable.ArrayBuffer[Int]()'
+    print('  val %s = %s' % (name, hex(num)))
+  print('  val all = {')
+  print('    val res = collection.mutable.ArrayBuffer[Int]()')
   for num, name in csrs:
-    print '    res += %s' % (name)
-  print '    res.toArray'
-  print '  }'
-  print '  val all32 = {'
-  print '    val res = collection.mutable.ArrayBuffer(all:_*)'
+    print('    res += %s' % (name))
+  print('    res.toArray')
+  print('  }')
+  print('  val all32 = {')
+  print('    val res = collection.mutable.ArrayBuffer(all:_*)')
   for num, name in csrs32:
-    print '    res += %s' % (name)
-  print '    res.toArray'
-  print '  }'
-  print '}'
+    print('    res += %s' % (name))
+  print('    res.toArray')
+  print('  }')
+  print('}')
 
 def signed(value, width):
   if 0 <= value < (1<<(width-1)):
@@ -861,37 +864,37 @@ def signed(value, width):
     return value - (1<<width)
 
 def print_go_insn(name):
-  print '\tcase A%s:' % name.upper().replace('.', '')
+  print('\tcase A%s:' % name.upper().replace('.', ''))
   m = match[name]
   opcode = yank(m, 0, 7)
   funct3 = yank(m, 12, 3)
   rs2 = yank(m, 20, 5)
   csr = yank(m, 20, 12)
   funct7 = yank(m, 25, 7)
-  print '\t\treturn &inst{0x%x, 0x%x, 0x%x, %d, 0x%x}, true' % (opcode, funct3, rs2, signed(csr, 12), funct7)
+  print('\t\treturn &inst{0x%x, 0x%x, 0x%x, %d, 0x%x}, true' % (opcode, funct3, rs2, signed(csr, 12), funct7))
 
 def make_go():
-  print '// Code generated by parse-opcodes; DO NOT EDIT.'
-  print
-  print 'package riscv'
-  print
-  print 'import "cmd/internal/obj"'
-  print
-  print 'type inst struct {'
-  print '\topcode uint32'
-  print '\tfunct3 uint32'
-  print '\trs2    uint32'
-  print '\tcsr    int64'
-  print '\tfunct7 uint32'
-  print '}'
-  print
-  print 'func encode(a obj.As) (i *inst, ok bool) {'
-  print '\tswitch a {'
+  print('// Code generated by parse-opcodes; DO NOT EDIT.')
+  print()
+  print('package riscv')
+  print()
+  print('import "cmd/internal/obj"')
+  print()
+  print('type inst struct {')
+  print('\topcode uint32')
+  print('\tfunct3 uint32')
+  print('\trs2    uint32')
+  print('\tcsr    int64')
+  print('\tfunct7 uint32')
+  print('}')
+  print()
+  print('func encode(a obj.As) (i *inst, ok bool) {')
+  print('\tswitch a {')
   for name in namelist:
     print_go_insn(name)
-  print '\t}'
-  print '\treturn nil, false'
-  print '}'
+  print('\t}')
+  print('\treturn nil, false')
+  print('}')
 
 for line in sys.stdin:
   line = line.partition('#')
@@ -909,7 +912,7 @@ for line in sys.stdin:
   mymask = 0
   cover = 0
 
-  if not name in arguments.keys():
+  if not name in list(arguments.keys()):
     arguments[name] = []
 
   for token in tokens[1:]:
@@ -950,7 +953,7 @@ for line in sys.stdin:
   if pseudo:
     pseudos[name] = 1
   else:
-    for name2,match2 in match.iteritems():
+    for name2,match2 in match.items():
       if name2 not in pseudos and (match2 & mymask) == mymatch:
         sys.exit("%s and %s overlap" % (name,name2))
 
-- 
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