From: Kwok Cheung Yeung <kcy@codesourcery.com>
This patch adds enough support for constructors/destructors and OS functions
to be able to link and run gfortran programs on AMD GCN.
There's no actual ability to do I/O operations on this targets, besides
"write" to stdout and stderr, so most of the functions are just stubs.
Add support for the AMD GCN GPU architecture. This is primarily intended for
use with OpenMP and OpenACC offloading. It can also be used for stand-alone
programs, but this is intended mostly for testing the compiler and is not
expected to be useful in general.
The GPU architecture is highly parallel, and therefore Newlib must be
configured to use dynamic re-entrancy, and thread-safe malloc.
The only I/O available is a via a shared-memory interface provided by libgomp
and the gcn-run tool included with GCC. At this time this is limited to
stdout, argc/argv, and the return code.
The new GCC port for OpenRISC will use the init_fini_array only and not
provide the init() and fini() functions. Disable the function usage by
default as its no longer needed.
Signed-off-by: Stafford Horne <shorne@gmail.com>
It's been a while... I see the CRIS port broke with the
time_t-default-to-64-bit change, observable by a few test-cases in the gcc
fortran(!) tests failing, regressing when trying a recent newlib.
This is a two-part belt-and-suspenders change: adjust the CRIS port
gettimeofday syscall (the only one in newlib/CRIS passing a time_t or
struct timeval) to handle a userspace 64-bit time_t and secondly default
time_t to 32-bit long anyway. I considered making the local
"kernel_timeval" copy in _gettimeofday conditional on (userspace) time_t
being 64 bits, but thought it not worth bothering with the few move insns.
The effect of a 64-bit time_t is however observable as longer simulation
time when running the gcc testsuite and as bigger binaries without any
actual upside from the larger time_t size, so I thought better make the
default for this port go back to being a "long" again.
Tested by running the gcc testsuite over the three combinations of two
parts of the patch and observing the expected changes. Committed.
newlib:
* configure.host (cris, crisv32): Default to "long" time_t.
Signed-off-by: Hans-Peter Nilsson <hp@axis.com>
Introduce new host configuration variable "have_init_fini" which is set
to "yes" by default. Override it for RISC-V to "no".
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
- From: Cesar Philippidis <cesar@codesourcery.com>
Date: Tue, 10 Apr 2018 14:43:42 -0700
Subject: [PATCH] nvptx port
This port adds support for Nvidia GPU's, which are primarily used as
offload accelerators in OpenACC and OpenMP.
RTEMS provides the option to have a global or per-thread reentrancy
as part of application configuration. As part of this, RTEMS provides
the implementation of __getreent() as appropriate. Allow the target
to determine if this method is present in libc.a.
Newlib uses _times_r() in clock(). The problem is that the _times_r()
clock frequency is defined by sysconf(_SC_CLK_TCK). The clock frequency
of clock() is the constant CLOCKS_PER_SEC.
FreeBSD uses getrusage() for clock(). Since RTEMS has only one process,
the implementation can be simplified.
Signed-off-by: Sebastian Huber <sebastian.huber@embedded-brains.de>
Intel MCU System V ABI are incompartible with i386 System V ABI:
o Minimum instruction set is Intel Pentium ISA minus x87 instructions
o No x87 or vector registers
o First three args are passed in %eax, %edx and %ecx
o Full specification available here:
https://github.com/hjl-tools/x86-psABI/wiki/iamcu-psABI-0.7.pdf
newlib/
* configure.host: Add new ix86-*-elfiamcu target
newlib/libc/include/
* setjmp.h: Change _JBLEN for Intel MCU target
newlib/libc/machine/i386/
* memchr.S: (memchr) Target-specific size-optimized version
* memcmp.S: (memcmp) Likewise
* memcpy.S: (memcpy) Likewise
* memmove.S: (memmove) Likewise
* memset.S: (memset) Likewise
* setjmp.S: (setjmp) Likewise
* strchr.S: (strchr) Likewise
* strlen.S: (strlen) Likewise
newlib/libc/stdlib/
* srtold.c: (__flt_rounds) Disable for Intel MCU
When running RTEMS paravirtualized in user space, the cli/sti instructions
can't be used. But I can't see why they are needed in either user or
supervisor state. Turning the use of them off for RTEMS.
This code is unmodified since the beginning of the repository, so I have
no insight into why it was done. I may even have been the one to add them.
Absolutely no idea except they aren't necessary.
(msp430): Set it.
* configure.in (newlib_nano_malloc): Leave unset if not set by
the user.
* configure: Regenerate.
* libc/configure.in (NEWLIB_NANO_MALLOC): Set after running
configure.host.
(newlib_nano_malloc): Leave unset if not set by the user.
* libc/configure: Regenerate.
* configure.host (sys_dir, newlib_cflags): Set sys_dir to tirtos and use
-D__DYNAMIC_REENT__ and -DMALLOC_PROVIDED compiler options for TIRTOS
target.
* libc/stdio/local.h (_STDIO_CLOSE_PER_REENT_STD_STREAMS): Change #ifdef
to not define this macro when __tirtos__ is defined.
* libc/sys/tirtos : Add support for TIRTOS.
* libc/sys/tirtos/Makefile.am, libc/sys/tirtos/lock.c: New files.
* libc/sys/tirtos/configure.in, libc/sys/tirtos/include/sys/lock.h: Ditto.
* configure.host: Disable new posix_spawn function for all
users of posix dir except Cygwin.
* libc/posix/Makefile.am: Add support for new posix_spawn function.
* libc/posix/Makefile.in: Regenerate.
* libc/posix/posix_spawn.c: New file.
* libc/include/spawn.h: Ditto.
Giacomo Tesio
Jeff Johnston
Stafford Horne
Sebastian Huber
Christophe Lyon
Hans-Peter Nilsson
Jon Beniston
Jaap de Wolff
Jim Wilson
Joel Sherrill
Kito Cheng
Igor Venevtsev
Corinna Vinschen
Anton Kolesov
Eric Botcazou
Nick Clifton
Anthony Green
DJ Delorie