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riscv-common.cc
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riscv-common.cc
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/* Common hooks for RISC-V.
Copyright (C) 2016-2024 Free Software Foundation, Inc.
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 <sstream>
#include <vector>
#define INCLUDE_STRING
#define INCLUDE_SET
#define INCLUDE_MAP
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "common/common-target.h"
#include "common/common-target-def.h"
#include "opts.h"
#include "flags.h"
#include "diagnostic-core.h"
#include "config/riscv/riscv-protos.h"
#include "config/riscv/riscv-subset.h"
#ifdef TARGET_BIG_ENDIAN_DEFAULT
#undef TARGET_DEFAULT_TARGET_FLAGS
#define TARGET_DEFAULT_TARGET_FLAGS (MASK_BIG_ENDIAN)
#endif
typedef bool (*riscv_implied_predicator_t) (const riscv_subset_list *);
/* Type for implied ISA info. */
struct riscv_implied_info_t
{
constexpr riscv_implied_info_t (const char *ext, const char *implied_ext,
riscv_implied_predicator_t predicator
= nullptr)
: ext (ext), implied_ext (implied_ext), predicator (predicator){};
bool match (const riscv_subset_list *subset_list, const char *ext_name) const
{
if (strcmp (ext_name, ext) != 0)
return false;
if (predicator && !predicator (subset_list))
return false;
return true;
}
bool match (const riscv_subset_list *subset_list,
const riscv_subset_t *subset) const
{
return match (subset_list, subset->name.c_str());
}
const char *ext;
const char *implied_ext;
riscv_implied_predicator_t predicator;
};
/* Implied ISA info, must end with NULL sentinel. */
static const riscv_implied_info_t riscv_implied_info[] =
{
{"d", "f"},
{"f", "zicsr"},
{"d", "zicsr"},
{"zdinx", "zfinx"},
{"zfinx", "zicsr"},
{"zdinx", "zicsr"},
{"zk", "zkn"},
{"zk", "zkr"},
{"zk", "zkt"},
{"zkn", "zbkb"},
{"zkn", "zbkc"},
{"zkn", "zbkx"},
{"zkn", "zkne"},
{"zkn", "zknd"},
{"zkn", "zknh"},
{"zks", "zbkb"},
{"zks", "zbkc"},
{"zks", "zbkx"},
{"zks", "zksed"},
{"zks", "zksh"},
{"v", "zvl128b"},
{"v", "zve64d"},
{"zve32f", "f"},
{"zve64f", "f"},
{"zve64d", "d"},
{"zve32x", "zvl32b"},
{"zve32f", "zve32x"},
{"zve32f", "zvl32b"},
{"zve64x", "zve32x"},
{"zve64x", "zvl64b"},
{"zve64f", "zve32f"},
{"zve64f", "zve64x"},
{"zve64f", "zvl64b"},
{"zve64d", "zve64f"},
{"zve64d", "zvl64b"},
{"zvl64b", "zvl32b"},
{"zvl128b", "zvl64b"},
{"zvl256b", "zvl128b"},
{"zvl512b", "zvl256b"},
{"zvl1024b", "zvl512b"},
{"zvl2048b", "zvl1024b"},
{"zvl4096b", "zvl2048b"},
{"zvl8192b", "zvl4096b"},
{"zvl16384b", "zvl8192b"},
{"zvl32768b", "zvl16384b"},
{"zvl65536b", "zvl32768b"},
{"zvkn", "zvkned"},
{"zvkn", "zvknhb"},
{"zvkn", "zvkb"},
{"zvkn", "zvkt"},
{"zvknc", "zvkn"},
{"zvknc", "zvbc"},
{"zvkng", "zvkn"},
{"zvkng", "zvkg"},
{"zvks", "zvksed"},
{"zvks", "zvksh"},
{"zvks", "zvkb"},
{"zvks", "zvkt"},
{"zvksc", "zvks"},
{"zvksc", "zvbc"},
{"zvksg", "zvks"},
{"zvksg", "zvkg"},
{"zvbb", "zvkb"},
{"zvbc", "zve64x"},
{"zvkb", "zve32x"},
{"zvkg", "zve32x"},
{"zvkned", "zve32x"},
{"zvknha", "zve32x"},
{"zvknhb", "zve64x"},
{"zvksed", "zve32x"},
{"zvksh", "zve32x"},
{"zfbfmin", "zfhmin"},
{"zfh", "zfhmin"},
{"zfhmin", "f"},
{"zfa", "f"},
{"zvfbfmin", "zve32f"},
{"zvfbfwma", "zvfbfmin"},
{"zvfbfwma", "zfbfmin"},
{"zvfhmin", "zve32f"},
{"zvfh", "zve32f"},
{"zvfh", "zfhmin"},
{"zhinx", "zhinxmin"},
{"zhinxmin", "zfinx"},
{"zce", "zca"},
{"zce", "zcb"},
{"zce", "zcmp"},
{"zce", "zcmt"},
{"zcf", "zca"},
{"zcd", "zca"},
{"zcb", "zca"},
{"zcmp", "zca"},
{"zcmt", "zca"},
{"zcmt", "zicsr"},
{"zcf", "f",
[] (const riscv_subset_list *subset_list) -> bool
{
return subset_list->xlen () == 32 && subset_list->lookup ("f");
}},
{"smaia", "ssaia"},
{"smstateen", "ssstateen"},
{"smepmp", "zicsr"},
{"ssaia", "zicsr"},
{"sscofpmf", "zicsr"},
{"ssstateen", "zicsr"},
{"sstc", "zicsr"},
{NULL, NULL}
};
/* This structure holds version information for specific ISA version. */
struct riscv_ext_version
{
const char *name;
enum riscv_isa_spec_class isa_spec_class;
int major_version;
int minor_version;
};
/* All standard extensions defined in all supported ISA spec. */
static const struct riscv_ext_version riscv_ext_version_table[] =
{
/* name, ISA spec, major version, minor_version. */
{"e", ISA_SPEC_CLASS_20191213, 2, 0},
{"e", ISA_SPEC_CLASS_20190608, 2, 0},
{"e", ISA_SPEC_CLASS_2P2, 2, 0},
{"i", ISA_SPEC_CLASS_20191213, 2, 1},
{"i", ISA_SPEC_CLASS_20190608, 2, 1},
{"i", ISA_SPEC_CLASS_2P2, 2, 0},
{"m", ISA_SPEC_CLASS_20191213, 2, 0},
{"m", ISA_SPEC_CLASS_20190608, 2, 0},
{"m", ISA_SPEC_CLASS_2P2, 2, 0},
{"a", ISA_SPEC_CLASS_20191213, 2, 1},
{"a", ISA_SPEC_CLASS_20190608, 2, 0},
{"a", ISA_SPEC_CLASS_2P2, 2, 0},
{"f", ISA_SPEC_CLASS_20191213, 2, 2},
{"f", ISA_SPEC_CLASS_20190608, 2, 2},
{"f", ISA_SPEC_CLASS_2P2, 2, 0},
{"d", ISA_SPEC_CLASS_20191213, 2, 2},
{"d", ISA_SPEC_CLASS_20190608, 2, 2},
{"d", ISA_SPEC_CLASS_2P2, 2, 0},
{"c", ISA_SPEC_CLASS_20191213, 2, 0},
{"c", ISA_SPEC_CLASS_20190608, 2, 0},
{"c", ISA_SPEC_CLASS_2P2, 2, 0},
{"h", ISA_SPEC_CLASS_NONE, 1, 0},
{"v", ISA_SPEC_CLASS_NONE, 1, 0},
{"zicsr", ISA_SPEC_CLASS_20191213, 2, 0},
{"zicsr", ISA_SPEC_CLASS_20190608, 2, 0},
{"zifencei", ISA_SPEC_CLASS_20191213, 2, 0},
{"zifencei", ISA_SPEC_CLASS_20190608, 2, 0},
{"zicond", ISA_SPEC_CLASS_NONE, 1, 0},
{"za64rs", ISA_SPEC_CLASS_NONE, 1, 0},
{"za128rs", ISA_SPEC_CLASS_NONE, 1, 0},
{"zawrs", ISA_SPEC_CLASS_NONE, 1, 0},
{"zba", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbs", ISA_SPEC_CLASS_NONE, 1, 0},
{"zfinx", ISA_SPEC_CLASS_NONE, 1, 0},
{"zdinx", ISA_SPEC_CLASS_NONE, 1, 0},
{"zhinx", ISA_SPEC_CLASS_NONE, 1, 0},
{"zhinxmin", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbkb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbkc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zbkx", ISA_SPEC_CLASS_NONE, 1, 0},
{"zkne", ISA_SPEC_CLASS_NONE, 1, 0},
{"zknd", ISA_SPEC_CLASS_NONE, 1, 0},
{"zknh", ISA_SPEC_CLASS_NONE, 1, 0},
{"zkr", ISA_SPEC_CLASS_NONE, 1, 0},
{"zksed", ISA_SPEC_CLASS_NONE, 1, 0},
{"zksh", ISA_SPEC_CLASS_NONE, 1, 0},
{"zkt", ISA_SPEC_CLASS_NONE, 1, 0},
{"zihintntl", ISA_SPEC_CLASS_NONE, 1, 0},
{"zihintpause", ISA_SPEC_CLASS_NONE, 2, 0},
{"zicboz",ISA_SPEC_CLASS_NONE, 1, 0},
{"zicbom",ISA_SPEC_CLASS_NONE, 1, 0},
{"zicbop",ISA_SPEC_CLASS_NONE, 1, 0},
{"zic64b", ISA_SPEC_CLASS_NONE, 1, 0},
{"ziccamoa", ISA_SPEC_CLASS_NONE, 1, 0},
{"ziccif", ISA_SPEC_CLASS_NONE, 1, 0},
{"zicclsm", ISA_SPEC_CLASS_NONE, 1, 0},
{"ziccrse", ISA_SPEC_CLASS_NONE, 1, 0},
{"zicntr", ISA_SPEC_CLASS_NONE, 2, 0},
{"zihpm", ISA_SPEC_CLASS_NONE, 2, 0},
{"zk", ISA_SPEC_CLASS_NONE, 1, 0},
{"zkn", ISA_SPEC_CLASS_NONE, 1, 0},
{"zks", ISA_SPEC_CLASS_NONE, 1, 0},
{"ztso", ISA_SPEC_CLASS_NONE, 1, 0},
{"zve32x", ISA_SPEC_CLASS_NONE, 1, 0},
{"zve32f", ISA_SPEC_CLASS_NONE, 1, 0},
{"zve64x", ISA_SPEC_CLASS_NONE, 1, 0},
{"zve64f", ISA_SPEC_CLASS_NONE, 1, 0},
{"zve64d", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvbb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvbc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkg", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkned", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvknha", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvknhb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvksed", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvksh", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkn", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvknc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkng", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvks", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvksc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvksg", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkt", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl32b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl64b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl128b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl256b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl512b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl1024b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl2048b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl4096b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl8192b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl16384b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl32768b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvl65536b", ISA_SPEC_CLASS_NONE, 1, 0},
{"zfbfmin", ISA_SPEC_CLASS_NONE, 1, 0},
{"zfh", ISA_SPEC_CLASS_NONE, 1, 0},
{"zfhmin", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvfbfmin", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvfbfwma", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvfhmin", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvfh", ISA_SPEC_CLASS_NONE, 1, 0},
{"zfa", ISA_SPEC_CLASS_NONE, 1, 0},
{"zmmul", ISA_SPEC_CLASS_NONE, 1, 0},
{"zca", ISA_SPEC_CLASS_NONE, 1, 0},
{"zcb", ISA_SPEC_CLASS_NONE, 1, 0},
{"zce", ISA_SPEC_CLASS_NONE, 1, 0},
{"zcf", ISA_SPEC_CLASS_NONE, 1, 0},
{"zcd", ISA_SPEC_CLASS_NONE, 1, 0},
{"zcmp", ISA_SPEC_CLASS_NONE, 1, 0},
{"zcmt", ISA_SPEC_CLASS_NONE, 1, 0},
{"smaia", ISA_SPEC_CLASS_NONE, 1, 0},
{"smepmp", ISA_SPEC_CLASS_NONE, 1, 0},
{"smstateen", ISA_SPEC_CLASS_NONE, 1, 0},
{"ssaia", ISA_SPEC_CLASS_NONE, 1, 0},
{"sscofpmf", ISA_SPEC_CLASS_NONE, 1, 0},
{"ssstateen", ISA_SPEC_CLASS_NONE, 1, 0},
{"sstc", ISA_SPEC_CLASS_NONE, 1, 0},
{"svinval", ISA_SPEC_CLASS_NONE, 1, 0},
{"svnapot", ISA_SPEC_CLASS_NONE, 1, 0},
{"svpbmt", ISA_SPEC_CLASS_NONE, 1, 0},
{"xcvmac", ISA_SPEC_CLASS_NONE, 1, 0},
{"xcvalu", ISA_SPEC_CLASS_NONE, 1, 0},
{"xcvelw", ISA_SPEC_CLASS_NONE, 1, 0},
{"xcvsimd", ISA_SPEC_CLASS_NONE, 1, 0},
{"xcvbi", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadba", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadbb", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadbs", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadcmo", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadcondmov", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadfmemidx", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadfmv", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadint", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadmac", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadmemidx", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadmempair", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadsync", ISA_SPEC_CLASS_NONE, 1, 0},
{"xtheadvector", ISA_SPEC_CLASS_NONE, 1, 0},
{"xventanacondops", ISA_SPEC_CLASS_NONE, 1, 0},
/* Terminate the list. */
{NULL, ISA_SPEC_CLASS_NONE, 0, 0}
};
/* Combine extensions defined in this table */
static const struct riscv_ext_version riscv_combine_info[] =
{
{"zk", ISA_SPEC_CLASS_NONE, 1, 0},
{"zkn", ISA_SPEC_CLASS_NONE, 1, 0},
{"zks", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkn", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvknc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvkng", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvks", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvksc", ISA_SPEC_CLASS_NONE, 1, 0},
{"zvksg", ISA_SPEC_CLASS_NONE, 1, 0},
/* Terminate the list. */
{NULL, ISA_SPEC_CLASS_NONE, 0, 0}
};
static const riscv_cpu_info riscv_cpu_tables[] =
{
#define RISCV_CORE(CORE_NAME, ARCH, TUNE) \
{CORE_NAME, ARCH, TUNE},
#include "../../../config/riscv/riscv-cores.def"
{NULL, NULL, NULL}
};
static const char *riscv_tunes[] =
{
#define RISCV_TUNE(TUNE_NAME, PIPELINE_MODEL, TUNE_INFO) \
TUNE_NAME,
#include "../../../config/riscv/riscv-cores.def"
NULL
};
static const char *riscv_supported_std_ext (void);
bool riscv_subset_list::parse_failed = false;
static riscv_subset_list *current_subset_list = NULL;
static riscv_subset_list *cmdline_subset_list = NULL;
struct riscv_func_target_info
{
tree fn_decl;
std::string fn_target_name;
riscv_func_target_info (const tree &decl, const std::string &target_name)
: fn_decl (decl), fn_target_name (target_name)
{
}
};
struct riscv_func_target_hasher : nofree_ptr_hash<struct riscv_func_target_info>
{
typedef tree compare_type;
static hashval_t hash (value_type);
static bool equal (value_type, const compare_type &);
};
static hash_table<riscv_func_target_hasher> *func_target_table = NULL;
static inline hashval_t riscv_func_decl_hash (tree fn_decl)
{
inchash::hash h;
h.add_ptr (fn_decl);
return h.end ();
}
inline hashval_t
riscv_func_target_hasher::hash (value_type value)
{
return riscv_func_decl_hash (value->fn_decl);
}
inline bool
riscv_func_target_hasher::equal (value_type value, const compare_type &key)
{
return value->fn_decl == key;
}
const riscv_subset_list *riscv_current_subset_list ()
{
return current_subset_list;
}
const riscv_subset_list * riscv_cmdline_subset_list ()
{
return cmdline_subset_list;
}
static inline void riscv_func_target_table_lazy_init ()
{
if (func_target_table != NULL)
return;
func_target_table = new hash_table<riscv_func_target_hasher> (1023);
}
std::string * riscv_func_target_get (tree fn_decl)
{
riscv_func_target_table_lazy_init ();
hashval_t hash = riscv_func_decl_hash (fn_decl);
struct riscv_func_target_info *info
= func_target_table->find_with_hash (fn_decl, hash);
return info == NULL ? NULL : &info->fn_target_name;
}
void riscv_func_target_put (tree fn_decl, std::string fn_target_name)
{
riscv_func_target_table_lazy_init ();
hashval_t hash = riscv_func_decl_hash (fn_decl);
struct riscv_func_target_info **target_info_slot
= func_target_table->find_slot_with_hash (fn_decl, hash, INSERT);
gcc_assert (!*target_info_slot);
struct riscv_func_target_info *info
= new riscv_func_target_info (fn_decl, fn_target_name);
*target_info_slot = info;
}
void riscv_func_target_remove_and_destory (tree fn_decl)
{
hashval_t hash = riscv_func_decl_hash (fn_decl);
struct riscv_func_target_info *info
= func_target_table->find_with_hash (fn_decl, hash);
if (info)
{
func_target_table->remove_elt_with_hash (fn_decl, hash);
delete info;
}
}
/* struct for recording multi-lib info. */
struct riscv_multi_lib_info_t {
std::string path;
std::string arch_str;
std::string abi_str;
std::vector<std::string> conds;
riscv_subset_list *subset_list;
static bool parse (struct riscv_multi_lib_info_t *,
const std::string &,
const std::vector<std::string> &);
};
/* Flag for checking if there is no suitable multi-lib found. */
static bool riscv_no_matched_multi_lib;
/* Used for record value of -march and -mabi. */
static std::string riscv_current_arch_str;
static std::string riscv_current_abi_str;
riscv_subset_t::riscv_subset_t ()
: name (), major_version (0), minor_version (0), next (NULL),
explicit_version_p (false), implied_p (false)
{
}
riscv_subset_list::riscv_subset_list (const char *arch, location_t loc)
: m_arch (arch), m_loc (loc), m_head (NULL), m_tail (NULL), m_xlen (0)
{
}
riscv_subset_list::~riscv_subset_list ()
{
if (!m_head)
return;
riscv_subset_t *item = this->m_head;
while (item != NULL)
{
riscv_subset_t *next = item->next;
delete item;
item = next;
}
}
/* Compute the match score of two arch string, return 0 if incompatible. */
int
riscv_subset_list::match_score (riscv_subset_list *list) const
{
riscv_subset_t *s;
int score = 0;
bool has_a_ext, list_has_a_ext;
/* Impossible to match if XLEN is different. */
if (list->m_xlen != this->m_xlen)
return 0;
/* There is different code gen in libstdc++ and libatomic between w/ A-ext
and w/o A-ext, and it not work if using soft and hard atomic mechanism
at same time, so they are incompatible. */
has_a_ext = this->lookup ("a") != NULL;
list_has_a_ext = list->lookup ("a") != NULL;
if (has_a_ext != list_has_a_ext)
return 0;
/* list must be subset of current this list, otherwise it not safe to
link.
TODO: We might give different weight for each extension, but the rule could
be complicated.
TODO: We might consider the version of each extension. */
for (s = list->m_head; s != NULL; s = s->next)
if (this->lookup (s->name.c_str ()) != NULL)
score++;
else
return 0;
return score;
}
/* Get the rank for single-letter subsets, lower value meaning higher
priority. */
static int
single_letter_subset_rank (char ext)
{
int rank;
switch (ext)
{
case 'i':
return 0;
case 'e':
return 1;
default:
break;
}
const char *all_ext = riscv_supported_std_ext ();
const char *ext_pos = strchr (all_ext, ext);
if (ext_pos == NULL)
/* If got an unknown extension letter, then give it an alphabetical
order, but after all known standard extension. */
rank = strlen (all_ext) + ext - 'a';
else
rank = (int)(ext_pos - all_ext) + 2 /* e and i has higher rank. */;
return rank;
}
/* Get the rank for multi-letter subsets, lower value meaning higher
priority. */
static int
multi_letter_subset_rank (const std::string &subset)
{
gcc_assert (subset.length () >= 2);
int high_order = -1;
int low_order = 0;
/* The order between multi-char extensions: s -> z -> x. */
char multiletter_class = subset[0];
switch (multiletter_class)
{
case 'z':
high_order = 0;
break;
case 's':
high_order = 1;
break;
case 'x':
high_order = 2;
break;
default:
gcc_unreachable ();
return -1;
}
if (multiletter_class == 'z')
/* Order for z extension on spec: If multiple "Z" extensions are named, they
should be ordered first by category, then alphabetically within a
category - for example, "Zicsr_Zifencei_Zam". */
low_order = single_letter_subset_rank (subset[1]);
else
low_order = 0;
return (high_order << 8) + low_order;
}
/* subset compare
Returns an integral value indicating the relationship between the subsets:
Return value indicates
-1 B has higher order than A.
0 A and B are same subset.
1 A has higher order than B.
*/
static int
subset_cmp (const std::string &a, const std::string &b)
{
if (a == b)
return 0;
size_t a_len = a.length ();
size_t b_len = b.length ();
/* Single-letter extension always get higher order than
multi-letter extension. */
if (a_len == 1 && b_len != 1)
return 1;
if (a_len != 1 && b_len == 1)
return -1;
if (a_len == 1 && b_len == 1)
{
int rank_a = single_letter_subset_rank (a[0]);
int rank_b = single_letter_subset_rank (b[0]);
if (rank_a < rank_b)
return 1;
else
return -1;
}
else
{
int rank_a = multi_letter_subset_rank(a);
int rank_b = multi_letter_subset_rank(b);
/* Using alphabetical/lexicographical order if they have same rank. */
if (rank_a == rank_b)
/* The return value of strcmp has opposite meaning. */
return -strcmp (a.c_str (), b.c_str ());
else
return (rank_a < rank_b) ? 1 : -1;
}
}
/* Return true if EXT is a standard extension. */
static bool
standard_extensions_p (const char *ext)
{
const riscv_ext_version *ext_ver;
for (ext_ver = &riscv_ext_version_table[0]; ext_ver->name != NULL; ++ext_ver)
if (strcmp (ext, ext_ver->name) == 0)
return true;
return false;
}
/* Add new subset to list. */
void
riscv_subset_list::add (const char *subset, int major_version,
int minor_version, bool explicit_version_p,
bool implied_p)
{
riscv_subset_t *ext = lookup (subset);
if (ext)
{
if (ext->implied_p)
{
/* We won't add impiled `ext` if it already in list. */
gcc_assert (!implied_p);
ext->implied_p = implied_p;
ext->major_version = major_version;
ext->minor_version = minor_version;
}
else
error_at (
m_loc,
"%<-march=%s%>: extension %qs appear more than one time",
m_arch,
subset);
return;
}
else if (strlen (subset) == 1 && !standard_extensions_p (subset))
{
error_at (m_loc,
"%<-march=%s%>: extension %qs is unsupported standard single "
"letter extension",
m_arch, subset);
return;
}
else if (subset[0] == 'z' && !standard_extensions_p (subset))
{
error_at (m_loc,
"%<-march=%s%>: extension %qs starts with 'z' but is "
"unsupported standard extension",
m_arch, subset);
return;
}
else if (subset[0] == 's' && !standard_extensions_p (subset))
{
error_at (m_loc,
"%<-march=%s%>: extension %qs starts with 's' but is "
"unsupported standard supervisor extension",
m_arch, subset);
return;
}
else if (subset[0] == 'x' && !standard_extensions_p (subset))
{
error_at (m_loc,
"%<-march=%s%>: extension %qs starts with 'x' but is "
"unsupported non-standard extension",
m_arch, subset);
return;
}
riscv_subset_t *s = new riscv_subset_t ();
riscv_subset_t *itr;
if (m_head == NULL)
m_head = s;
s->name = subset;
s->major_version = major_version;
s->minor_version = minor_version;
s->explicit_version_p = explicit_version_p;
s->implied_p = implied_p;
s->next = NULL;
if (m_tail == NULL)
{
m_tail = s;
return;
}
/* e, i or g should be first subext, never come here. */
gcc_assert (subset[0] != 'e'
&& subset[0] != 'i'
&& subset[0] != 'g');
if (m_tail == m_head)
{
gcc_assert (m_head->next == NULL);
m_head->next = s;
m_tail = s;
return;
}
gcc_assert (m_head->next != NULL);
/* Subset list must in canonical order, but implied subset won't
add in canonical order. */
for (itr = m_head; itr->next != NULL; itr = itr->next)
{
riscv_subset_t *next = itr->next;
int cmp = subset_cmp (s->name, next->name);
gcc_assert (cmp != 0);
if (cmp > 0)
{
s->next = next;
itr->next = s;
return;
}
}
/* Insert at tail of the list. */
itr->next = s;
m_tail = s;
}
static void
get_default_version (const char *ext,
unsigned int *major_version,
unsigned int *minor_version)
{
const riscv_ext_version *ext_ver;
for (ext_ver = &riscv_ext_version_table[0];
ext_ver->name != NULL;
++ext_ver)
if (strcmp (ext, ext_ver->name) == 0)
{
if ((ext_ver->isa_spec_class == riscv_isa_spec) ||
(ext_ver->isa_spec_class == ISA_SPEC_CLASS_NONE))
{
*major_version = ext_ver->major_version;
*minor_version = ext_ver->minor_version;
return;
}
}
/* Not found version info. */
*major_version = 0;
*minor_version = 0;
}
/* Add new subset to list, but using default version from ISA spec version. */
void
riscv_subset_list::add (const char *subset, bool implied_p)
{
unsigned int major_version = 0, minor_version = 0;
get_default_version (subset, &major_version, &minor_version);
add (subset, major_version, minor_version, false, implied_p);
}
/* Convert subset info to string with explicit version info,
VERSION_P to determine append version info or not. */
std::string
riscv_subset_list::to_string (bool version_p) const
{
std::ostringstream oss;
oss << "rv" << m_xlen;
bool first = true;
riscv_subset_t *subset;
bool skip_zifencei = false;
bool skip_zicsr = false;
bool i2p0 = false;
/* For RISC-V ISA version 2.2 or earlier version, zicsr and zifencei is
included in the base ISA. */
if (riscv_isa_spec == ISA_SPEC_CLASS_2P2)
{
skip_zifencei = true;
skip_zicsr = true;
}
for (subset = m_head; subset != NULL; subset = subset->next)
if (subset->name == "i")
{
i2p0 = subset->major_version == 2 && subset->minor_version == 0;
break;
}
#ifndef HAVE_AS_MISA_SPEC
/* Skip since older binutils doesn't recognize zicsr. */
skip_zicsr = true;
#endif
#ifndef HAVE_AS_MARCH_ZIFENCEI
/* Skip since older binutils doesn't recognize zifencei, we made
a mistake in that binutils 2.35 supports zicsr but not zifencei. */
skip_zifencei = true;
#endif
for (subset = m_head; subset != NULL; subset = subset->next)
{
if (((subset->implied_p && skip_zifencei) || i2p0) &&
subset->name == "zifencei")
continue;
if (((subset->implied_p && skip_zicsr) || i2p0) &&
subset->name == "zicsr")
continue;
/* For !version_p, we only separate extension with underline for
multi-letter extension. */
if (!first &&
(version_p
|| subset->explicit_version_p
|| subset->name.length() > 1))
oss << '_';
first = false;
oss << subset->name;
/* Let binutils decide the extension version if we don't know. */
if ((version_p || subset->explicit_version_p) &&
(subset->major_version != 0 || subset->minor_version != 0))
oss << subset->major_version
<< 'p'
<< subset->minor_version;
}
return oss.str ();
}
/* Find subset in list with version checking, return NULL if not found.
major/minor version checking can be ignored if major_version/minor_version
is RISCV_DONT_CARE_VERSION. */
riscv_subset_t *
riscv_subset_list::lookup (const char *subset, int major_version,
int minor_version) const
{
riscv_subset_t *s;
for (s = m_head; s != NULL; s = s->next)
if (strcasecmp (s->name.c_str (), subset) == 0)
{
if ((major_version != RISCV_DONT_CARE_VERSION)
&& (s->major_version != major_version))
return NULL;
if ((minor_version != RISCV_DONT_CARE_VERSION)
&& (s->minor_version != minor_version))
return NULL;
return s;
}
return s;
}