+2009-03-24 Arthur Loiret <aloiret@debian.org>
+
+ * config.host (alpha*-*-linux*): Use driver-alpha.o and
+ alpha/x-alpha.
+ * config/alpha/linux.h (host_detect_local_cpu): Declare, add to
+ EXTRA_SPEC_FUNCTIONS.
+ (MCPU_MTUNE_NATIVE_SPECS, DRIVER_SELF_SPECS): New macros.
+ * config/alpha/driver-alpha.c, config/alpha/x-alpha: New.
+ * doc/invoke.texi (DEC Alpha Options): Document 'native' value for
+ -march and -mtune options.
+
2009-03-24 Ralf Corsépius <ralf.corsepius@rtems.org>
* config/m68k/t-rtems: Add m5329 multilib.
--- /dev/null
+/* Subroutines for the gcc driver.
+ Copyright (C) 2009 Free Software Foundation, Inc.
+ Contributed by Arthur Loiret <aloiret@debian.org>
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3, or (at your option)
+any later version.
+
+GCC is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+
+/* This will be called by the spec parser in gcc.c when it sees
+ a %:local_cpu_detect(args) construct. Currently it will be called
+ with either "cpu" or "tune" as argument depending on if -mcpu=native
+ or -mtune=native is to be substituted.
+
+ It returns a string containing new command line parameters to be
+ put at the place of the above two options, depending on what CPU
+ this is executed. E.g. "-mcpu=ev6" on an Alpha 21264 for
+ -mcpu=native. If the routine can't detect a known processor,
+ the -mcpu or -mtune option is discarded.
+
+ ARGC and ARGV are set depending on the actual arguments given
+ in the spec. */
+const char *
+host_detect_local_cpu (int argc, const char **argv)
+{
+ const char *cpu = NULL;
+ char buf[128];
+ FILE *f;
+
+ static const struct cpu_names {
+ const char *const name;
+ const char *const cpu;
+ } cpu_names[] = {
+ { "EV79", "ev67" },
+ { "EV7", "ev67" },
+ { "EV69", "ev67" },
+ { "EV68CX", "ev67" },
+ { "EV68CB", "ev67" },
+ { "EV68AL", "ev67" },
+ { "EV67", "ev67" },
+ { "EV6", "ev6" },
+ { "PCA57", "pca56" },
+ { "PCA56", "pca56" },
+ { "EV56", "ev56" },
+ { "EV5", "ev5" },
+ { "LCA45", "ev45" },
+ { "EV45", "ev45" },
+ { "LCA4", "ev4" },
+ { "EV4", "ev4" },
+/* { "EV3", "ev3" }, */
+ { 0, 0 }
+ };
+
+ int i;
+
+ if (argc < 1)
+ return NULL;
+
+ if (strcmp (argv[0], "cpu") && strcmp (argv[0], "tune"))
+ return NULL;
+
+ f = fopen ("/proc/cpuinfo", "r");
+ if (f == NULL)
+ return NULL;
+
+ while (fgets (buf, sizeof (buf), f) != NULL)
+ if (strncmp (buf, "cpu model", sizeof ("cpu model") - 1) == 0)
+ {
+ for (i = 0; cpu_names [i].name; i++)
+ if (strstr (buf, cpu_names [i].name) != NULL)
+ {
+ cpu = cpu_names [i].cpu;
+ break;
+ }
+ break;
+ }
+
+ fclose (f);
+
+ if (cpu == NULL)
+ return NULL;
+
+ return concat ("-m", argv[0], "=", cpu, NULL);
+}
/* Define if long doubles should be mangled as 'g'. */
#define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
+
+/* -mcpu=native handling only makes sense with compiler running on
+ an Alpha chip. */
+#if defined(__alpha__) || defined(__alpha)
+extern const char *host_detect_local_cpu (int argc, const char **argv);
+# define EXTRA_SPEC_FUNCTIONS \
+ { "local_cpu_detect", host_detect_local_cpu },
+
+# define MCPU_MTUNE_NATIVE_SPECS \
+ " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}" \
+ " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
+#else
+# define MCPU_MTUNE_NATIVE_SPECS ""
+#endif
+
+#define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
Schedules as an EV6 and supports the BWX, CIX, FIX, and MAX extensions.
@end table
+Native Linux/GNU toolchains also support the value @samp{native},
+which selects the best architecture option for the host processor.
+@option{-mcpu=native} has no effect if GCC does not recognize
+the processor.
+
@item -mtune=@var{cpu_type}
@opindex mtune
Set only the instruction scheduling parameters for machine type
@var{cpu_type}. The instruction set is not changed.
+Native Linux/GNU toolchains also support the value @samp{native},
+which selects the best architecture option for the host processor.
+@option{-mtune=native} has no effect if GCC does not recognize
+the processor.
+
@item -mmemory-latency=@var{time}
@opindex mmemory-latency
Sets the latency the scheduler should assume for typical memory
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