PATCH: add pa2.0 system instructions

[Jeffrey A Law]

  In message < 199906211343.JAA27277@wmtl249c.us.nortel.com >you write:
  > Changelog:
  > 
  > Mon Jun 21 09:42:05 EDT 1999  Jerry Quinn <jquinn@nortelnetworks.com>
  > 
  > 	* include/opcode/hppa.h (pa_opcodes):  Add entries for mfia
  > 	and mtsarcm instructions.
  > 
  > *** pa-prev/include/opcode/hppa.h	Sun Jun 20 23:51:34 1999
  > --- gas-src/include/opcode/hppa.h	Mon Jun 21 09:41:16 1999
  > ***************
  > *** 349,354 ****
  > --- 349,356 ----
  >   { "ldsid",      0x000010a0, 0xfc1f3fe0, "(b),t", pa10},
  >   { "mtsp",       0x00001820, 0xffe01fff, "x,S", pa10},
  >   { "mtctl",      0x00001840, 0xfc00ffff, "x,^", pa10},
  > + { "mtsarcm",    0x02c018c0, 0xffe0ffff, "x", pa20},
I believe this opcode is wrong. 

I believe the right opcode is 0x16018c0

Page 7-98 of the PA2.0 manual:
0x00 -- 6 bits
0x0b -- 5 bits
reg  -- 5 bits
res  -- 3 bits (must be zeros)
0xc6 -- 8 bits
0x00 -- 5 bits

Which looks like:
000000 01011 xxxxx 000 11000110 00000

Turn that into 4 bit nibbles for the opcode we get.
0000 0001 011x xxxx 0001 1000 1100 0000
 0    1    6    0    1    8    c    0


I believe the mask, operands, etc are correct

 
  > + { "mfia",	0x00001540, 0xffffffe0, "t", pa20},
Similarly I think your opcode is wrong with this one too.

Page 7-90 of the PA2.0 manual
0x00 6 bits
res  5 bits (must be zeros)
0x00 5 bits
res  3 bits
0xa5 8 bits
reg  5 bits

Which gives us:
000000 00000 00000 000 10100101 00000

Into 4 bit nibbles:
0000 0000 0000 0000 0001 0100 1010 0000
 0    0    0    0    1    4    a    0

I'm pretty sure your mask, operands, etc are correct


Running those instructions through the HP assembler confirms my encodings
of those instructions:

    4 00000000 (016018C0)          mtsarcm %r0
    5 00000004 (000014A0)          mfia %r0


I've got a 95% functional PA2.0 assembler (and testsuite) that Cygnus will
be contributing to binutils after it's delivered to HP (June 30) & cleaned up
a little in July.  I don't know if that changes your plans for contributing
this kind of stuff.

I'm going to fix the opcodes in your patch and install it.
jeff