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opcodes: blackfin: decode all ASTAT bits 

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
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4
opcodes/ChangeLog
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@ -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