| Message ID | 1466504822.3012.7.camel@atmel.com |
|---|---|
| State | New |
| Headers | show |
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
--- 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. + It allows compiler to use truncation instead of rounding towards + 0 for fractional 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>