Re: [patch, avr,wwwdocs] PR 58655

[Georg-Johann Lay <avr@gjlay.de>]

Pitchumani Sivanupandi schrieb:
> Attached patches add documentation for -mfract-convert-truncate option
> and add that info to release notes (gcc-4.9 changes).
> 
> If OK, could someone commit please? I do not have commit access.
> 
> Regards,
> Pitchumani
> 
> gcc/ChangeLog
> 
> 2016-06-21  Pitchumani Sivanupandi  <pitchumani.s@atmel.com>
> 
>     PR target/58655
>     * doc/invoke.texi (AVR Options): Document -mfract-convert-truncate
>     option.
> 
> --- a/wwwdocs/htdocs/gcc-4.9/changes.html
> +++ b/wwwdocs/htdocs/gcc-4.9/changes.html
> @@ -579,6 +579,14 @@ auto incr(T x) { return x++; }
>         size when compiling for the M-profile processors.
>       </li>
>       </ul>
> +<h3 id="avr">AVR</h3>
> +<ul>
> +  <li>
> +    A new command-line option -mfract-convert-truncate has been added.

<code> tags around the option.

> +    It allows compiler to use truncation instead of rounding towards
> +    0 for fractional int types.

"zero" instead of "0", and it's for fixed-point types, not for int types.

> +  </li>
> +</ul>
>  <h3 id="x86">IA-32/x86-64</h3>
>    <ul>
>      <li><code>-mfpmath=sse</code> is now implied by <code>-ffast-math</code>

> Attached patches add documentation for -mfract-convert-truncate option
> and add that info to release notes (gcc-4.9 changes).
> 
> If OK, could someone commit please? I do not have commit access.
> 
> Regards,
> Pitchumani
> 
> gcc/ChangeLog
> 
> 2016-06-21  Pitchumani Sivanupandi  <pitchumani.s@atmel.com>
> 
>     PR target/58655
>     * doc/invoke.texi (AVR Options): Document -mfract-convert-truncate
>     option.
> 
> 
> 
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -643,8 +643,8 @@ Objective-C and Objective-C++ Dialects}.
>  @emph{AVR Options}
>  @gccoptlist{-mmcu=@var{mcu} -maccumulate-args -mbranch-cost=@var{cost} @gol
>  -mcall-prologues -mint8 -mn_flash=@var{size} -mno-interrupts @gol
> --mrelax -mrmw -mstrict-X -mtiny-stack -nodevicelib -Waddr-space-convert @gol
> --Wmisspelled-isr}
> +-mrelax -mrmw -mstrict-X -mtiny-stack -mfract-convert-truncate -nodevicelib @gol
> +-Waddr-space-convert -Wmisspelled-isr}
>  
>  @emph{Blackfin Options}
>  @gccoptlist{-mcpu=@var{cpu}@r{[}-@var{sirevision}@r{]} @gol
> @@ -14586,6 +14586,10 @@ sbiw r26, const   ; X -= const
>  @opindex mtiny-stack
>  Only change the lower 8@tie{}bits of the stack pointer.
>  
> +@item -mfract-convert-truncate
> +@opindex mfract-convert-truncate
> +Allow to use truncation instead of rounding towards 0 for fractional int types.

Same here: "zero" and "fixed-point".

> +
>  @item -nodevicelib
>  @opindex nodevicelib
>  Don't link against AVR-LibC's device specific library @code{lib<mcu>.a}.


Thanks, Johann