Re: [ARM] Is TARGET_UNIFIED_ASM still needed?

[Richard Earnshaw <rearnsha at arm dot com>]

On 22/07/14 16:23, Ramana Radhakrishnan wrote:
> 
> 
> On 22/07/14 14:14, Kyrill Tkachov wrote:
>> Hi all,
>>
>> In the arm backend we've got this TARGET_UNIFIED_ASM macro that is
>> currently on for TARGET_THUMB2 with a comment that says:
>> /* We could use unified syntax for arm mode, but for now we just use it
>>      for Thumb-2.  */
>>
>> I've been doing some work converting the pre-UAL floating point
>> mnemonics to unified syntax and it seems if we were to strictly adhere
>> to this TARGET_UNIFIED_ASM I would have to guard those changes, which
>> would be somewhat ugly.
> 
> I would just change vfp.md to UAL and expect it to work because GAS 
> accepts unified syntax for the floating point instructions even without 
> .syntax unified.
> 
> We need T_U_A until the point of time that the Thumb1 port is converted 
> to UAL, GAS validated against Thumb1 and the rest of the "arm" port is 
> converted to UAL and verified with GAS.
> 
> Additionally if someone were to do the full transition, remember that 
> users need to have a way of mixing non-unified syntax in inline 
> assembler with unified syntax in the rest of the C code.
> 
> 
> regards
> Ramana
> 
>>
>> Is it perhaps time to just drop this and assume unified asm everywhere?
>>
>>
>> Kyrill
>>
>>
> 
> 
> 

We also need to be able to support User's inline assembly that is not in
unified syntax.  Though that might be a different issue to the one
you're trying to address here.

R.