RE: [avr-gcc-list] Transfer bit conserved by gcc?

[Weddington, Eric]

> -----Original Message-----
> From: 
> address@hidden 
> [mailto:address@hidden
> org] On Behalf Of Ruud Vlaming
> Sent: Friday, September 19, 2008 5:15 AM
> To: address@hidden
> Subject: [avr-gcc-list] Transfer bit conserved by gcc?
> 
> It is hard to find an awnser to the following question by google, 
> so lets post it here.
> 
> Is it true that avr-gcc never produces code that makes explicit
> use of the T-bit? 

No.

In GCC 4.3.2, in the machine description for the avr (gcc/config/avr/avr.md), 
there is define_insn "abssf2" that will use the T bit. It generates a CLT and 
BLD instructions. However, I have no idea how often the define_insn "abssf2" 
will trigger. But yes, there is a possibility.

And of course gas is aware of the SET and CLT instructions.

Eric Weddington