Re: nvptx-tools and nvptx-newlib (was: The nvptx port [10/11+] Target files)

[Thomas Schwinge <thomas at codesourcery dot com>]

Hi!

On Tue, 23 Dec 2014 19:49:35 +0100, I wrote:
> On Mon, 10 Nov 2014 17:19:57 +0100, Bernd Schmidt <bernds@codesourcery.com> wrote:
> > The scripts (11/11) I've put up on github, along with a hacked up 
> > newlib. These are at [...]

> > They are likely to migrate to MentorEmbedded from bernds, but that had 
> > some permissions problems last week.
> 
> That has recently been done:
> <https://github.com/MentorEmbedded/nvptx-tools> and
> <https://github.com/MentorEmbedded/nvptx-newlib> are now available.
> 
> (I'm aware that we still are to write up how to actually build and test
> all this.)

I just updated
<https://gcc.gnu.org/wiki/Offloading?action=diff&rev2=26&rev1=25>.

OK to check in the following to trunk?

commit a0c73cb76d1f13642df7725d64bc618ee0909abc
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Mon Feb 2 16:29:36 2015 +0100

    Begin documenting the nvptx backend.
    
    	gcc/
    	* doc/install.texi (nvptx-*-none): New section.
    	* doc/invoke.texi (Nvidia PTX Options): Likewise.
    	* config/nvptx/nvptx.opt: Update.
---
 gcc/config/nvptx/nvptx.opt | 10 +++++-----
 gcc/doc/install.texi       | 23 +++++++++++++++++++++++
 gcc/doc/invoke.texi        | 26 ++++++++++++++++++++++++++
 3 files changed, 54 insertions(+), 5 deletions(-)

diff --git gcc/config/nvptx/nvptx.opt gcc/config/nvptx/nvptx.opt
index 1448dfc..249a61d 100644
--- gcc/config/nvptx/nvptx.opt
+++ gcc/config/nvptx/nvptx.opt
@@ -17,13 +17,13 @@
 ; along with GCC; see the file COPYING3.  If not see
 ; <http://www.gnu.org/licenses/>.
 
-m64
-Target Report RejectNegative Mask(ABI64)
-Generate code for a 64 bit ABI
-
 m32
 Target Report RejectNegative InverseMask(ABI64)
-Generate code for a 32 bit ABI
+Generate code for a 32-bit ABI
+
+m64
+Target Report RejectNegative Mask(ABI64)
+Generate code for a 64-bit ABI
 
 mmainkernel
 Target Report RejectNegative
diff --git gcc/doc/install.texi gcc/doc/install.texi
index c9e3bf1..b31f9b6 100644
--- gcc/doc/install.texi
+++ gcc/doc/install.texi
@@ -3302,6 +3302,8 @@ information have to.
 @item
 @uref{#nds32be-x-elf,,nds32be-*-elf}
 @item
+@uref{#nvptx-x-none,,nvptx-*-none}
+@item
 @uref{#powerpc-x-x,,powerpc*-*-*}
 @item
 @uref{#powerpc-x-darwin,,powerpc-*-darwin*}
@@ -4269,6 +4271,27 @@ Andes NDS32 target in big endian mode.
 @html
 <hr />
 @end html
+@anchor{nvptx-x-none}
+@heading nvptx-*-none
+Nvidia PTX target.
+
+Instead of GNU binutils, you will need to install
+@uref{https://github.com/MentorEmbedded/nvptx-tools/,,nvptx-tools}.
+Tell GCC where to find it:
+@option{--with-build-time-tools=[install-nvptx-tools]/nvptx-none/bin}.
+
+A nvptx port of newlib is available at
+@uref{https://github.com/MentorEmbedded/nvptx-newlib/,,nvptx-newlib}.
+It can be automatically built together with GCC@.  For this, add a
+symbolic link to nvptx-newlib's @file{newlib} directory to the
+directory containing the GCC sources.
+
+Use the @option{--disable-sjlj-exceptions} and
+@option{--enable-newlib-io-long-long} options when configuring.
+
+@html
+<hr />
+@end html
 @anchor{powerpc-x-x}
 @heading powerpc-*-*
 You can specify a default version for the @option{-mcpu=@var{cpu_type}}
diff --git gcc/doc/invoke.texi gcc/doc/invoke.texi
index ba81ec7..1fb329e 100644
--- gcc/doc/invoke.texi
+++ gcc/doc/invoke.texi
@@ -840,6 +840,9 @@ Objective-C and Objective-C++ Dialects}.
 -mcustom-fpu-cfg=@var{name} @gol
 -mhal -msmallc -msys-crt0=@var{name} -msys-lib=@var{name}}
 
+@emph{Nvidia PTX Options}
+@gccoptlist{-m32 -m64 -mmainkernel}
+
 @emph{PDP-11 Options}
 @gccoptlist{-mfpu  -msoft-float  -mac0  -mno-ac0  -m40  -m45  -m10 @gol
 -mbcopy  -mbcopy-builtin  -mint32  -mno-int16 @gol
@@ -11967,6 +11970,7 @@ platform.
 * MSP430 Options::
 * NDS32 Options::
 * Nios II Options::
+* Nvidia PTX Options::
 * PDP-11 Options::
 * picoChip Options::
 * PowerPC Options::
@@ -18277,6 +18281,28 @@ This option is typically used to link with a library provided by a HAL BSP.
 
 @end table
 
+@node Nvidia PTX Options
+@subsection Nvidia PTX Options
+@cindex Nvidia PTX options
+@cindex nvptx options
+
+These options are defined for Nvidia PTX:
+
+@table @gcctabopt
+
+@item -m32
+@itemx -m64
+@opindex m32
+@opindex m64
+Generate code for 32-bit or 64-bit ABI.
+
+@item -mmainkernel
+@opindex mmainkernel
+Link in code for a __main kernel.  This is for stand-alone instead of
+offloading execution.
+
+@end table
+
 @node PDP-11 Options
 @subsection PDP-11 Options
 @cindex PDP-11 Options


GrÃÃe,
 Thomas

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