638 lines
14 KiB
C++
638 lines
14 KiB
C++
/* Subroutines for the gcc driver.
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Copyright (C) 2007-2022 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GCC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#define IN_TARGET_CODE 1
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#include "config.h"
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#include "system.h"
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#include "coretypes.h"
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#include "tm.h"
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#include "diagnostic.h"
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#include "opts.h"
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#include <stdlib.h>
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#ifdef _AIX
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# include <sys/systemcfg.h>
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#endif
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#ifdef __linux__
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# include <link.h>
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#endif
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#if defined (__APPLE__) || (__FreeBSD__)
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# include <sys/types.h>
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# include <sys/sysctl.h>
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#endif
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#ifdef __linux__
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/* Canonical GCC cpu name table. */
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static const char *rs6000_supported_cpu_names[] =
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{
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#define RS6000_CPU(NAME, CPU, FLAGS) NAME,
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#include "rs6000-cpus.def"
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#undef RS6000_CPU
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};
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/* This table holds a list of cpus where their Linux AT_PLATFORM name differs
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from their GCC canonical name. The first column in a row contains the GCC
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canonical cpu name and the other columns in that row contain AT_PLATFORM
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names that should be mapped to the canonical name. */
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static const char *linux_cpu_translation_table[][4] = {
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{ "403", "ppc403", NULL },
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{ "405", "ppc405", NULL },
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{ "440", "ppc440", "ppc440gp", NULL },
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{ "476", "ppc470", NULL },
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{ "601", "ppc601", NULL },
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{ "603", "ppc603", NULL },
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{ "604", "ppc604", NULL },
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{ "7400", "ppc7400", NULL },
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{ "7450", "ppc7450", NULL },
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{ "750", "ppc750", NULL },
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{ "823", "ppc823", NULL },
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{ "8540", "ppc8540", NULL },
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{ "8548", "ppc8548", NULL },
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{ "970", "ppc970", NULL },
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{ "cell", "ppc-cell-be", NULL },
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{ "e500mc", "ppce500mc", NULL },
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{ "e5500", "ppce5500", NULL },
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{ "e6500", "ppce6500", NULL },
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{ "power7", "power7+", NULL },
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{ NULL } /* End of table sentinel. */
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};
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#endif
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const char *host_detect_local_cpu (int argc, const char **argv);
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#if GCC_VERSION >= 0
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/* Returns parameters that describe L1_ASSOC associative cache of size
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L1_SIZEKB with lines of size L1_LINE, and L2_SIZEKB. */
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static char *
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describe_cache (unsigned l1_sizekb, unsigned l1_line,
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unsigned l1_assoc ATTRIBUTE_UNUSED, unsigned l2_sizekb)
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{
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char l1size[1000], line[1000], l2size[1000];
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/* At the moment, gcc middle-end does not use the information about the
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associativity of the cache. */
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sprintf (l1size, "--param l1-cache-size=%u", l1_sizekb);
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sprintf (line, "--param l1-cache-line-size=%u", l1_line);
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sprintf (l2size, "--param l2-cache-size=%u", l2_sizekb);
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return concat (l1size, " ", line, " ", l2size, " ", NULL);
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}
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#ifdef __APPLE__
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/* Returns the description of caches on Darwin. */
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static char *
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detect_caches_darwin (void)
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{
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unsigned l1_sizekb, l1_line, l1_assoc, l2_sizekb;
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size_t len = 4;
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static int l1_size_name[2] = { CTL_HW, HW_L1DCACHESIZE };
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static int l1_line_name[2] = { CTL_HW, HW_CACHELINE };
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static int l2_size_name[2] = { CTL_HW, HW_L2CACHESIZE };
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sysctl (l1_size_name, 2, &l1_sizekb, &len, NULL, 0);
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sysctl (l1_line_name, 2, &l1_line, &len, NULL, 0);
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sysctl (l2_size_name, 2, &l2_sizekb, &len, NULL, 0);
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l1_assoc = 0;
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return describe_cache (l1_sizekb / 1024, l1_line, l1_assoc,
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l2_sizekb / 1024);
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}
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static const char *
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detect_processor_darwin (void)
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{
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unsigned int proc;
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size_t len = 4;
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sysctlbyname ("hw.cpusubtype", &proc, &len, NULL, 0);
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if (len > 0)
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switch (proc)
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{
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case 1:
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return "601";
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case 2:
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return "602";
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case 3:
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return "603";
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case 4:
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case 5:
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return "603e";
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case 6:
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return "604";
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case 7:
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return "604e";
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case 8:
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return "620";
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case 9:
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return "750";
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case 10:
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return "7400";
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case 11:
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return "7450";
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case 100:
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return "970";
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default:
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return "powerpc";
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}
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return "powerpc";
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}
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#endif /* __APPLE__ */
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#ifdef __FreeBSD__
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/* Returns the description of caches on FreeBSD PPC. */
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static char *
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detect_caches_freebsd (void)
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{
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unsigned l1_sizekb, l1_line, l1_assoc, l2_sizekb;
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size_t len = 4;
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/* Currently, as of FreeBSD-7.0, there is only the cacheline_size
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available via sysctl. */
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sysctlbyname ("machdep.cacheline_size", &l1_line, &len, NULL, 0);
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l1_sizekb = 32;
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l1_assoc = 0;
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l2_sizekb = 512;
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return describe_cache (l1_sizekb, l1_line, l1_assoc, l2_sizekb);
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}
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/* Currently returns default powerpc. */
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static const char *
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detect_processor_freebsd (void)
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{
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return "powerpc";
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}
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#endif /* __FreeBSD__ */
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#ifdef __linux__
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/* Returns the canonical AT_PLATFORM if present, otherwise NULL. */
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static const char *
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elf_platform (void)
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{
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/* Used to cache the result we determine below. */
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static const char *cpu = NULL;
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/* Use the cached AT_PLATFORM cpu name if we've already determined it. */
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if (cpu != NULL)
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return cpu;
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int fd = open ("/proc/self/auxv", O_RDONLY);
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if (fd != -1)
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{
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char buf[1024];
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ElfW(auxv_t) *av;
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ssize_t n;
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n = read (fd, buf, sizeof (buf));
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close (fd);
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if (n > 0)
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{
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for (av = (ElfW(auxv_t) *) buf; av->a_type != AT_NULL; ++av)
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if (av->a_type == AT_PLATFORM)
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{
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/* Cache the result. */
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cpu = (const char *) av->a_un.a_val;
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break;
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}
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}
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/* Verify that CPU is either a valid -mcpu=<cpu> option name, or is a
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valid alternative name. If it is a valid alternative name, then use
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the canonical name. */
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if (cpu != NULL)
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{
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size_t i, j;
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char *s;
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/* Check if AT_PLATFORM is a GCC canonical cpu name. */
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for (i = 0; i < ARRAY_SIZE (rs6000_supported_cpu_names); i++)
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if (!strcmp (cpu, rs6000_supported_cpu_names[i]))
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return cpu;
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/* Check if AT_PLATFORM can be translated to a canonical cpu name. */
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for (i = 0; linux_cpu_translation_table[i][0] != NULL; i++)
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{
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const char *canonical = linux_cpu_translation_table[i][0];
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for (j = 1; linux_cpu_translation_table[i][j] != NULL; j++)
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if (!strcmp (cpu, linux_cpu_translation_table[i][j]))
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{
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/* Cache the result. */
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cpu = canonical;
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return cpu;
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}
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}
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/* The kernel returned an AT_PLATFORM name we do not support. */
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auto_vec <const char *> candidates;
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for (i = 0; i < ARRAY_SIZE (rs6000_supported_cpu_names); i++)
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candidates.safe_push (rs6000_supported_cpu_names[i]);
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candidates_list_and_hint (cpu, s, candidates);
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error ("unsupported cpu name returned from kernel "
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"for %<-mcpu=native%>: %s", cpu);
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fatal_error (input_location, "please use an explicit cpu name; "
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"valid cpu names are: %s", s);
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}
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}
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return NULL;
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}
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/* Returns AT_DCACHEBSIZE if present, otherwise generic 32. */
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static int
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elf_dcachebsize (void)
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{
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int fd;
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fd = open ("/proc/self/auxv", O_RDONLY);
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if (fd != -1)
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{
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char buf[1024];
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ElfW(auxv_t) *av;
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ssize_t n;
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n = read (fd, buf, sizeof (buf));
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close (fd);
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if (n > 0)
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{
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for (av = (ElfW(auxv_t) *) buf; av->a_type != AT_NULL; ++av)
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switch (av->a_type)
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{
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case AT_DCACHEBSIZE:
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return av->a_un.a_val;
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default:
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break;
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}
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}
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}
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return 32;
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}
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/* Returns the description of caches on Linux. */
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static char *
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detect_caches_linux (void)
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{
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unsigned l1_sizekb, l1_line, l1_assoc, l2_sizekb;
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const char *platform;
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platform = elf_platform ();
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if (platform != NULL)
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{
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l1_line = 128;
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if (platform[5] == '6')
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/* POWER6 and POWER6x */
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l1_sizekb = 64;
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else
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l1_sizekb = 32;
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}
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else
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{
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l1_line = elf_dcachebsize ();
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l1_sizekb = 32;
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}
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l1_assoc = 0;
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l2_sizekb = 512;
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return describe_cache (l1_sizekb, l1_line, l1_assoc, l2_sizekb);
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}
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static const char *
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detect_processor_linux (void)
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{
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const char *platform;
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platform = elf_platform ();
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if (platform != NULL)
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return platform;
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else
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return "powerpc";
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}
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#endif /* __linux__ */
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#ifdef _AIX
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/* Returns the description of caches on AIX. */
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static char *
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detect_caches_aix (void)
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{
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unsigned l1_sizekb, l1_line, l1_assoc, l2_sizekb;
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l1_sizekb = _system_configuration.dcache_size / 1024;
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l1_line = _system_configuration.dcache_line;
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l1_assoc = _system_configuration.dcache_asc;
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l2_sizekb = _system_configuration.L2_cache_size / 1024;
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return describe_cache (l1_sizekb, l1_line, l1_assoc, l2_sizekb);
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}
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/* Returns the processor implementation on AIX. */
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static const char *
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detect_processor_aix (void)
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{
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switch (_system_configuration.implementation)
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{
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case 0x0008:
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return "601";
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case 0x0020:
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return "603";
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case 0x0010:
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return "604";
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case 0x0040:
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return "620";
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case 0x0080:
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return "630";
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case 0x0100:
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case 0x0200:
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case 0x0400:
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return "rs64";
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case 0x0800:
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return "power4";
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case 0x2000:
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if (_system_configuration.version == 0x0F0000)
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return "power5";
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else
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return "power5+";
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case 0x4000:
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return "power6";
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case 0x8000:
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return "power7";
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case 0x10000:
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return "power8";
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case 0x20000:
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return "power9";
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case 0x40000:
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return "power10";
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default:
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return "powerpc";
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}
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}
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#endif /* _AIX */
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/*
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* Array to map -mcpu=native names to the switches passed to the assembler.
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* This list mirrors the specs in ASM_CPU_SPEC, and any changes made here
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* should be made there as well.
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*/
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struct asm_name {
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const char *cpu;
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const char *asm_sw;
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};
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static const struct asm_name asm_names[] = {
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#if defined (_AIX)
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{ "power3", "-m620" },
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{ "power4", "-mpwr4" },
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{ "power5", "-mpwr5" },
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{ "power5+", "-mpwr5x" },
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{ "power6", "-mpwr6" },
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{ "power6x", "-mpwr6" },
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{ "power7", "-mpwr7" },
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{ "power8", "-mpwr8" },
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{ "power9", "-mpwr9" },
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{ "power10", "-mpwr10" },
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{ "powerpc", "-mppc" },
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{ "rs64", "-mppc" },
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{ "603", "-m603" },
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{ "603e", "-m603" },
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{ "604", "-m604" },
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{ "604e", "-m604" },
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{ "620", "-m620" },
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{ "630", "-m620" },
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{ "970", "-m970" },
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{ "G5", "-m970" },
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{ NULL, "\
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%{mvsx: -mpwr6; \
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maltivec: -m970; \
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maix64|mpowerpc64: -mppc64; \
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: %(asm_default)}" },
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#else
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{ "cell", "-mcell" },
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{ "power3", "-mppc64" },
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{ "power4", "-mpower4" },
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{ "power5", "-mpower5" },
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{ "power5+", "-mpower5" },
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{ "power6", "-mpower6 %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "power6x", "-mpower6 %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "power7", "-mpower7" },
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{ "power8", "%{mpower9-vector:-mpower9;:-mpower8}" },
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{ "power9", "-mpower9" },
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{ "power10", "-mpower10" },
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{ "a2", "-ma2" },
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{ "powerpc", "-mppc" },
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{ "powerpc64", "-mppc64" },
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{ "powerpc64le", "%{mpower9-vector:-mpower9;:-mpower8}" },
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{ "rs64", "-mppc64" },
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{ "401", "-mppc" },
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{ "403", "-m403" },
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{ "405", "-m405" },
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{ "405fp", "-m405" },
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{ "440", "-m440" },
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{ "440fp", "-m440" },
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{ "464", "-m440" },
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{ "464fp", "-m440" },
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{ "476", "-m476" },
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{ "476fp", "-m476" },
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{ "505", "-mppc" },
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{ "601", "-m601" },
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{ "602", "-mppc" },
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{ "603", "-mppc" },
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{ "603e", "-mppc" },
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{ "ec603e", "-mppc" },
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{ "604", "-mppc" },
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{ "604e", "-mppc" },
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{ "620", "-mppc64" },
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{ "630", "-mppc64" },
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{ "740", "-mppc" },
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{ "750", "-mppc" },
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{ "G3", "-mppc" },
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{ "7400", "-mppc %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "7450", "-mppc %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "G4", "-mppc %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "801", "-mppc" },
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{ "821", "-mppc" },
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{ "823", "-mppc" },
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{ "860", "-mppc" },
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{ "970", "-mpower4 %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "G5", "-mpower4 %{!mvsx:%{!maltivec:-maltivec}}" },
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{ "8540", "-me500" },
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{ "8548", "-me500" },
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{ "e300c2", "-me300" },
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{ "e300c3", "-me300" },
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{ "e500mc", "-me500mc" },
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{ "e500mc64", "-me500mc64" },
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{ "e5500", "-me5500" },
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{ "e6500", "-me6500" },
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{ "titan", "-mtitan" },
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{ NULL, "\
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%{mpower9-vector: -mpower9; \
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mpower8-vector|mcrypto|mdirect-move|mhtm: -mpower8; \
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mvsx: -mpower7; \
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mpowerpc64: -mppc64; \
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: %(asm_default)}" },
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#endif
|
|
};
|
|
|
|
/* This will be called by the spec parser in gcc.cc when it sees
|
|
a %:local_cpu_detect(args) construct. Currently it will be called
|
|
with either "arch" or "tune" as argument depending on if -march=native
|
|
or -mtune=native is to be substituted.
|
|
|
|
Additionally it will be called with "asm" to select the appropriate flags
|
|
for the assembler.
|
|
|
|
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.
|
|
|
|
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;
|
|
const char *cache = "";
|
|
const char *options = "";
|
|
bool arch;
|
|
bool assembler;
|
|
size_t i;
|
|
|
|
if (argc < 1)
|
|
return NULL;
|
|
|
|
arch = strcmp (argv[0], "cpu") == 0;
|
|
assembler = (!arch && strcmp (argv[0], "asm") == 0);
|
|
if (!arch && !assembler && strcmp (argv[0], "tune"))
|
|
return NULL;
|
|
|
|
if (! assembler)
|
|
{
|
|
#if defined (_AIX)
|
|
cache = detect_caches_aix ();
|
|
#elif defined (__APPLE__)
|
|
cache = detect_caches_darwin ();
|
|
#elif defined (__FreeBSD__)
|
|
cache = detect_caches_freebsd ();
|
|
/* FreeBSD PPC does not provide any cache information yet. */
|
|
cache = "";
|
|
#elif defined (__linux__)
|
|
cache = detect_caches_linux ();
|
|
/* PPC Linux does not provide any cache information yet. */
|
|
cache = "";
|
|
#else
|
|
cache = "";
|
|
#endif
|
|
}
|
|
|
|
#if defined (_AIX)
|
|
cpu = detect_processor_aix ();
|
|
#elif defined (__APPLE__)
|
|
cpu = detect_processor_darwin ();
|
|
#elif defined (__FreeBSD__)
|
|
cpu = detect_processor_freebsd ();
|
|
#elif defined (__linux__)
|
|
cpu = detect_processor_linux ();
|
|
#else
|
|
cpu = "powerpc";
|
|
#endif
|
|
|
|
if (assembler)
|
|
{
|
|
for (i = 0; i < sizeof (asm_names) / sizeof (asm_names[0]); i++)
|
|
{
|
|
if (!asm_names[i].cpu || !strcmp (asm_names[i].cpu, cpu))
|
|
return asm_names[i].asm_sw;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
return concat (cache, "-m", argv[0], "=", cpu, " ", options, NULL);
|
|
}
|
|
|
|
#else /* GCC_VERSION */
|
|
|
|
/* If we aren't compiling with GCC we just provide a minimal
|
|
default value. */
|
|
const char *
|
|
host_detect_local_cpu (int argc, const char **argv)
|
|
{
|
|
const char *cpu;
|
|
bool arch;
|
|
|
|
if (argc < 1)
|
|
return NULL;
|
|
|
|
arch = strcmp (argv[0], "cpu") == 0;
|
|
if (!arch && strcmp (argv[0], "tune"))
|
|
return NULL;
|
|
|
|
if (arch)
|
|
cpu = "powerpc";
|
|
|
|
return concat ("-m", argv[0], "=", cpu, NULL);
|
|
}
|
|
|
|
#endif /* GCC_VERSION */
|
|
|