From 2d11bac94537e08b30b8ace0eb39ecbbbc386c8e Mon Sep 17 00:00:00 2001
From: Andrew Waterman <waterman@eecs.berkeley.edu>
Date: Mon, 25 Nov 2013 01:43:47 -0800
Subject: New privileged ISA

---
 parse-opcodes | 86 ++++++++++++++++++++++++++++++++++++++++++++++++-----------
 1 file changed, 71 insertions(+), 15 deletions(-)

(limited to 'parse-opcodes')

diff --git a/parse-opcodes b/parse-opcodes
index 3117b8e..8b4b2ea 100755
--- a/parse-opcodes
+++ b/parse-opcodes
@@ -40,6 +40,35 @@ arglut['cimm6'] = (15,10)
 arglut['cimm10'] = (14,5)
 arglut['cimm5'] = (9,5)
 
+csrs = {
+  0x001 : 'fflags',
+  0x002 : 'frm',
+  0x003 : 'fcsr',
+  0x004 : 'cycle',
+  0x005 : 'time',
+  0x006 : 'instret',
+  0x500 : 'sup0',
+  0x501 : 'sup1',
+  0x502 : 'epc',
+  0x503 : 'badvaddr',
+  0x504 : 'ptbr',
+  0x505 : 'asid',
+  0x506 : 'count',
+  0x507 : 'compare',
+  0x508 : 'evec',
+  0x509 : 'cause',
+  0x50A : 'status',
+  0x50B : 'hartid',
+  0x50C : 'impl',
+  0x50D : 'fatc',
+  0x50E : 'send_ipi',
+  0x50F : 'clear_ipi',
+  0x51C : 'stats', # XXX
+  0x51D : 'reset',
+  0x51E : 'tohost',
+  0x51F : 'fromhost',
+}
+
 opcode_base = 0
 opcode_size = 7
 funct_base = 12
@@ -49,17 +78,28 @@ def binary(n, digits=0):
   rep = bin(n)[2:]
   return rep if digits == 0 else ('0' * (digits - len(rep))) + rep
 
-def make_disasm_table(match,mask):
+def make_c(match,mask):
   print '/* Automatically generated by parse-opcodes */'
-  for name,match in match.iteritems():
+  print '#ifndef RISCV_ENCODING_H'
+  print '#define RISCV_ENCODING_H'
+  for name in match.iterkeys():
     name2 = name.upper().replace('.','_')
-    print '#define MATCH_%s %s' % (name2, hex(match))
-    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.items():
+    print '#define CSR_%s %s' % (name.upper(), hex(num))
+  print '#endif'
 
-def make_isasim(match, mask):
+  print '#ifdef DECLARE_INSN'
   for name in match.iterkeys():
     name2 = name.replace('.','_')
-    print 'DECLARE_INSN(%s, 0x%x, 0x%x)' % (name2, match[name], mask[name])
+    print 'DECLARE_INSN(%s, MATCH_%s, MASK_%s)' % (name2, name2.upper(), name2.upper())
+  print '#endif'
+
+  print '#ifdef DECLARE_CSR'
+  for num, name in csrs.items():
+    print 'DECLARE_CSR(%s, CSR_%s)' % (name, name.upper())
+  print '#endif'
 
 def yank(num,start,len):
   return (num >> start) & ((1 << len) - 1)
@@ -490,7 +530,7 @@ def make_latex_table():
   print_insts('addi', 'slti', 'sltiu', 'xori', 'ori', 'andi', 'slli', 'srli', 'srai')
   print_insts('add', 'sub', 'sll', 'slt', 'sltu', 'xor', 'srl', 'sra', 'or', 'and')
   print_insts('fence', 'fence.i')
-  print_insts('syscall', 'break', 'rdcycle', 'rdtime', 'rdinstret')
+  print_insts('scall', 'sbreak', 'rdcycle', 'rdtime', 'rdinstret')
   print_footer(0)
 
   print_header('r','a','i','s')
@@ -525,6 +565,8 @@ def make_latex_table():
   print_insts('fcvt.w.s', 'fcvt.wu.s', 'fmv.x.s')
   print_insts('feq.s', 'flt.s', 'fle.s')
   print_insts('fssr', 'frsr')
+  print_insts('fsflags', 'frflags')
+  print_insts('fsrm', 'frrm')
   print_footer(0)
 
   print_header('r','r4','i','s')
@@ -555,9 +597,21 @@ def print_chisel_insn(name):
   print s + "\")"
 
 def make_chisel():
-  print '  /* Automatically generated by parse-opcodes */'
+  print '/* Automatically generated by parse-opcodes */'
+  print 'object Instructions {'
   for name in namelist:
     print_chisel_insn(name)
+  print '}'
+  print 'object CSRs {'
+  for num, name in csrs.items():
+    print '  val %s = %d' % (name, num)
+  print '  val all = {'
+  print '    val res = collection.mutable.ArrayBuffer[Int]()'
+  for num, name in csrs.items():
+    print '    res += %s' % (name)
+  print '    res.toArray'
+  print '  }'
+  print '}'
 
 for line in sys.stdin:
   line = line.partition('#')
@@ -568,6 +622,9 @@ for line in sys.stdin:
   assert len(tokens) >= 2
 
   name = tokens[0]
+  pseudo = name[0] == '@'
+  if pseudo:
+    name = name[1:]
   mymatch = 0
   mymask = 0
   cover = 0
@@ -610,9 +667,10 @@ for line in sys.stdin:
   if not (cover == 0xFFFFFFFF or cover == 0xFFFF):
     sys.exit("%s: not all bits are covered" % name)
 
-  for name2,match2 in match.iteritems():
-    if (match2 & mymask) == mymatch:
-      sys.exit("%s and %s overlap" % (name,name2))
+  if not pseudo:
+    for name2,match2 in match.iteritems():
+      if (match2 & mymask) == mymatch:
+        sys.exit("%s and %s overlap" % (name,name2))
 
   mask[name] = mymask
   match[name] = mymatch
@@ -622,9 +680,7 @@ if sys.argv[1] == '-tex':
   make_latex_table()
 elif sys.argv[1] == '-chisel':
   make_chisel()
-elif sys.argv[1] == '-disasm':
-  make_disasm_table(match,mask)
-elif sys.argv[1] == '-isasim':
-  make_isasim(match,mask)
+elif sys.argv[1] == '-c':
+  make_c(match,mask)
 else:
   assert 0
-- 
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