> Am 30.12.2013 um 15:48 schrieb Richard Henderson <r...@twiddle.net>:
>
>> On 12/27/2013 04:23 PM, Scott Wood wrote:
>>> On Tue, 2013-12-24 at 07:17 -0800, Richard Henderson wrote:
>>>> On 12/18/2013 12:48 PM, Tom Musta wrote:
>>>> +DEF_HELPER_3(bpermd, i64, env, i64, i64)
>>>
>>> Should be DEF_HELPER_FLAGS_2(bpermd, TCG_CALL_NO_RWG_SE, i64, i64, i64)
>>>
>>>> +uint64_t helper_bpermd(CPUPPCState *env, uint64_t rs, uint64_t rb)
>>>> +{
>>>> + int i;
>>>> + uint64_t ra = 0;
>>>> +
>>>> + for (i = 0; i < 8; i++) {
>>>> + int index = (rs >> (i*8)) & 0xFF;
>>>> + if (index < 64) {
>>>> + if (rb & (1ul << (63-index))) {
>>>> + ra |= 1 << i;
>>>> + }
>>>> + }
>>>> + }
>>>> + return ra;
>>>> +}
>>>> +
>>>
>>> You don't need env as an argument; it's unused.
>>>
>>> Why is all of this specific to ppc64? Can't you run an ISA2.06B machine in
>>> 32-bit mode?
>>
>> bpermd is a 64-bit instruction. 32-bit implementations do not have it.
>
> What has that got to do with running a 64-bit chip in 32-bit mode?
Yes you can, but we only expose 64bit capable cpus with TARGET_PPC64 defined.
You couldn't select them with the 32bit target.
There is even a special linux user target that loads 32bit binaries with the
64bit emulator and 32bit syscall wrapper.
Or are you referring to something else than the #ifdef TARGET_PPC64?
Alex
>
>
> r~
>
>
