FreeChainXenon/binutils-gdb
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

opcodes: blackfin: decode all ASTAT bits

Browse source 
All ASTAT bits work in the hardware even though they aren't part of the
official Blackfin ISA.  So decode every ASTAT field to make the output
a bit nicer when working with hand generated opcodes.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Mike Frysinger 2010-09-22 21:39:08 +00:00
parent 50e2162a22
commit b2459327a6
2 changed files with 25 additions and 8 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
opcodes/ChangeLog
View file

@ -1,3 +1,7 @@
2010-09-22 Mike Frysinger <vapier@gentoo.org>
* bfin-dis.c (decode_CC2stat_0): Decode all ASTAT bits.
2010-09-22 Robin Getz <robin.getz@analog.com>
* bfin-dis.c (IS_DREG, IS_PREG, IS_GENREG, IS_DAGREG): Reject

29
opcodes/bfin-dis.c
View file

@ -1227,44 +1227,57 @@ decode_CC2stat_0 (TIword iw0, disassemble_info *outf)
int op = ((iw0 >> CC2stat_op_bits) & CC2stat_op_mask);
int cbit = ((iw0 >> CC2stat_cbit_bits) & CC2stat_cbit_mask);
const char *bitname = statbits (cbit);
if (decode_statbits[cbit] == REG_LASTREG)
{
/* All ASTAT bits except CC may be operated on in hardware, but may
not have a dedicated insn, so still decode "valid" insns. */
static char bitnames[64];
if (cbit != 5)
sprintf (bitnames, "ASTAT[%i /* unused bit */]", cbit);
else
strcpy (bitnames, "CC /* ... Illegal register ... */");
bitname = bitnames;
}
if (op == 0 && D == 0)
{
OUTS (outf, "CC = ");
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
}
else if (op == 1 && D == 0)
{
OUTS (outf, "CC |= ");
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
}
else if (op == 2 && D == 0)
{
OUTS (outf, "CC &= ");
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
}
else if (op == 3 && D == 0)
{
OUTS (outf, "CC ^= ");
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
}
else if (op == 0 && D == 1)
{
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
OUTS (outf, " = CC");
}
else if (op == 1 && D == 1)
{
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
OUTS (outf, " |= CC");
}
else if (op == 2 && D == 1)
{
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
OUTS (outf, " &= CC");
}
else if (op == 3 && D == 1)
{
OUTS (outf, statbits (cbit));
OUTS (outf, bitname);
OUTS (outf, " ^= CC");
}
else