>>>>> Kai Ruottu writes:
Kai> In the crossgcc list was a problem with gcc-3.4 generating the opcode
Kai> 'mfcr' with '-mcpu=power' for the second created multilib, when the
Kai> GCC target is 'rs6000-ibm-aix4.3'. The other multilibs produced as
Kai> default are for '-pthread', '-mcpu=powerpc' and '-maix64'... The AIX
Kai> users could judge if all these are normally required, but when the
Kai> builder also used the '--without-threads', the first sounds being vain
Kai> or even clashing with something. Building no multilibs using
Kai> '--disable-multilib' of course is possible...
Kai> But what is the case with the 'mfcr' and POWER ? Bug in GNU as (the
Kai> Linux binutils-2.15.94.0.2.2 was tried) or in GCC (both gcc-3.3.5 and
Kai> gcc-3.4.3 were tried) ?
First, AIX assembler is recommended on AIX. This is mentioned in
the platform-specific installation information. The use of GNU Assembler
on AIX probably is the source of your problems.
The mfcr instruction has existed since the original POWER
architecture. It always is valid.
The instruction was updated in POWER4 and later chips to accept an
optional operand to specify which field to move. That variant only is
enabled for processors that support the instruction. The variant is not
enabled for -mcpu=power.
David
