target-ppc: Implement bcdcfz. instruction
bcdcfz. converts from Zoned numeric format to BCD. Zoned format uses a byte to represent a digit where the most significant nibble is 0x3 or 0xf, depending on the preferred signal. Signed-off-by: NJose Ricardo Ziviani <joserz@linux.vnet.ibm.com> Signed-off-by: NDavid Gibson <david@gibson.dropbear.id.au>
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