| Message ID | ed5881d3-02a2-a576-18b0-92503c40b8fb@foss.arm.com |
|---|---|
| State | New |
| Headers | show |
| Series | [GCC/ARM] Allow +nodsp for -mcpu=cortex-m33 | expand |
On 16/10/17 10:27, Thomas Preudhomme wrote: > Hi, > > DSP instructions are optional for Arm Cortex-M33, yet its -mcpu option > does not allow +nodsp. Users are thus left with using > -march=armv8-m.main -mtune=cortex-m33. This patch allows +nodsp to > -mcpu=cortex-m33. > > ChangeLog entry is as follows: > > *** gcc/ChangeLog *** > > 2017-10-11 Thomas Preud'homme <thomas.preudhomme@arm.com> > > * config/arm/arm-cpus.in (cortex-m33): Add nodsp option. > * doc/invoke.texi: Document +nodsp as a valid extension for > -mcpu=cortex-m33. > > Tested by building an arm-none-eabi GCC cross-compiler and checking that > __ARM_FEATURE_DSP is *not* defined when invoked with > -mcpu=cortex-m33+nodsp. > > Is this ok for trunk? > OK. R. > Best regards, > > Thomas > > allow_cortex_m33_nodsp.patch > > > diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in > index 07de4c9375ba7a0df0d8bd00385e54a4042e5264..25fc429a8338e433b9fcd0ee385ff127423494c2 100644 > --- a/gcc/config/arm/arm-cpus.in > +++ b/gcc/config/arm/arm-cpus.in > @@ -1516,6 +1516,7 @@ begin cpu cortex-m33 > architecture armv8-m.main+dsp > fpu fpv5-sp-d16 > option nofp remove ALL_FP > + option nodsp remove armv7em > costs v7m > end cpu cortex-m33 > > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi > index 9ad1fb339babe2ce8f45ecac2fa93d7b9ae5fd30..722d5cc2c0a020906e6df3260822cdd268245082 100644 > --- a/gcc/doc/invoke.texi > +++ b/gcc/doc/invoke.texi > @@ -15803,6 +15803,9 @@ Permissible names for this option are the same as those for > The following extension options are common to the listed CPUs: > > @table @samp > +@item +nodsp > +Disable the DSP instructions on @samp{cortex-m33}. > + > @item +nofp > Disables the floating-point instructions on @samp{arm9e}, > @samp{arm946e-s}, @samp{arm966e-s}, @samp{arm968e-s}, @samp{arm10e}, >
diff --git a/gcc/config/arm/arm-cpus.in b/gcc/config/arm/arm-cpus.in index 07de4c9375ba7a0df0d8bd00385e54a4042e5264..25fc429a8338e433b9fcd0ee385ff127423494c2 100644 --- a/gcc/config/arm/arm-cpus.in +++ b/gcc/config/arm/arm-cpus.in @@ -1516,6 +1516,7 @@ begin cpu cortex-m33 architecture armv8-m.main+dsp fpu fpv5-sp-d16 option nofp remove ALL_FP + option nodsp remove armv7em costs v7m end cpu cortex-m33 diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 9ad1fb339babe2ce8f45ecac2fa93d7b9ae5fd30..722d5cc2c0a020906e6df3260822cdd268245082 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -15803,6 +15803,9 @@ Permissible names for this option are the same as those for The following extension options are common to the listed CPUs: @table @samp +@item +nodsp +Disable the DSP instructions on @samp{cortex-m33}. + @item +nofp Disables the floating-point instructions on @samp{arm9e}, @samp{arm946e-s}, @samp{arm966e-s}, @samp{arm968e-s}, @samp{arm10e},