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// 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/>.
#ifndef RUST_BUILTINS_H
#define RUST_BUILTINS_H
#include "rust-system.h"
#include "tree.h"
#include "langhooks.h"
namespace Rust {
namespace Compile {
// https://github.com/rust-lang/rust/blob/master/library/core/src/intrinsics.rs
// https://github.com/rust-lang/rust/blob/master/compiler/rustc_codegen_llvm/src/intrinsic.rs
// https://github.com/Rust-GCC/gccrs/issues/658
//
// let llvm_name = match name {
// sym::sqrtf32 => "llvm.sqrt.f32",
// sym::sqrtf64 => "llvm.sqrt.f64",
// sym::powif32 => "llvm.powi.f32",
// sym::powif64 => "llvm.powi.f64",
// sym::sinf32 => "llvm.sin.f32",
// sym::sinf64 => "llvm.sin.f64",
// sym::cosf32 => "llvm.cos.f32",
// sym::cosf64 => "llvm.cos.f64",
// sym::powf32 => "llvm.pow.f32",
// sym::powf64 => "llvm.pow.f64",
// sym::expf32 => "llvm.exp.f32",
// sym::expf64 => "llvm.exp.f64",
// sym::exp2f32 => "llvm.exp2.f32",
// sym::exp2f64 => "llvm.exp2.f64",
// sym::logf32 => "llvm.log.f32",
// sym::logf64 => "llvm.log.f64",
// sym::log10f32 => "llvm.log10.f32",
// sym::log10f64 => "llvm.log10.f64",
// sym::log2f32 => "llvm.log2.f32",
// sym::log2f64 => "llvm.log2.f64",
// sym::fmaf32 => "llvm.fma.f32",
// sym::fmaf64 => "llvm.fma.f64",
// sym::fabsf32 => "llvm.fabs.f32",
// sym::fabsf64 => "llvm.fabs.f64",
// sym::minnumf32 => "llvm.minnum.f32",
// sym::minnumf64 => "llvm.minnum.f64",
// sym::maxnumf32 => "llvm.maxnum.f32",
// sym::maxnumf64 => "llvm.maxnum.f64",
// sym::copysignf32 => "llvm.copysign.f32",
// sym::copysignf64 => "llvm.copysign.f64",
// sym::floorf32 => "llvm.floor.f32",
// sym::floorf64 => "llvm.floor.f64",
// sym::ceilf32 => "llvm.ceil.f32",
// sym::ceilf64 => "llvm.ceil.f64",
// sym::truncf32 => "llvm.trunc.f32",
// sym::truncf64 => "llvm.trunc.f64",
// sym::rintf32 => "llvm.rint.f32",
// sym::rintf64 => "llvm.rint.f64",
// sym::nearbyintf32 => "llvm.nearbyint.f32",
// sym::nearbyintf64 => "llvm.nearbyint.f64",
// sym::roundf32 => "llvm.round.f32",
// sym::roundf64 => "llvm.round.f64",
// _ => return None,
// };
// Some(cx.get_intrinsic(&llvm_name))
class BuiltinsContext
{
public:
static BuiltinsContext &get ()
{
static BuiltinsContext instance;
return instance;
}
bool lookup_simple_builtin (const std::string &name, tree *builtin)
{
auto it = rust_intrinsic_to_gcc_builtin.find (name);
if (it == rust_intrinsic_to_gcc_builtin.end ())
return false;
return lookup_gcc_builtin (it->second, builtin);
}
private:
static const int builtin_const = 1 << 0;
static const int builtin_noreturn = 1 << 1;
static const int builtin_novops = 1 << 2;
BuiltinsContext () { setup (); }
void setup ()
{
tree math_function_type_f32
= build_function_type_list (float_type_node, float_type_node, NULL_TREE);
define_builtin ("sinf32", BUILT_IN_SINF, "__builtin_sinf", "sinf",
math_function_type_f32, builtin_const);
define_builtin ("sqrtf32", BUILT_IN_SQRTF, "__builtin_sqrtf", "sqrtf",
math_function_type_f32, builtin_const);
define_builtin ("unreachable", BUILT_IN_UNREACHABLE,
"__builtin_unreachable", NULL,
build_function_type (void_type_node, void_list_node),
builtin_const | builtin_noreturn);
define_builtin ("abort", BUILT_IN_ABORT, "__builtin_abort", "abort",
build_function_type (void_type_node, void_list_node),
builtin_const | builtin_noreturn);
define_builtin ("breakpoint", BUILT_IN_TRAP, "__builtin_trap", "breakpoint",
build_function_type (void_type_node, void_list_node),
builtin_const | builtin_noreturn);
define_builtin (
"memcpy", BUILT_IN_MEMCPY, "__builtin_memcpy", "memcpy",
build_function_type_list (build_pointer_type (void_type_node),
build_pointer_type (void_type_node),
build_pointer_type (void_type_node),
size_type_node, NULL_TREE),
0);
}
// Define a builtin function. BCODE is the builtin function code
// defined by builtins.def. NAME is the name of the builtin function.
// LIBNAME is the name of the corresponding library function, and is
// NULL if there isn't one. FNTYPE is the type of the function.
// CONST_P is true if the function has the const attribute.
// NORETURN_P is true if the function has the noreturn attribute.
void define_builtin (const std::string rust_name, built_in_function bcode,
const char *name, const char *libname, tree fntype,
int flags)
{
tree decl = add_builtin_function (name, fntype, bcode, BUILT_IN_NORMAL,
libname, NULL_TREE);
if ((flags & builtin_const) != 0)
TREE_READONLY (decl) = 1;
if ((flags & builtin_noreturn) != 0)
TREE_THIS_VOLATILE (decl) = 1;
if ((flags & builtin_novops) != 0)
DECL_IS_NOVOPS (decl) = 1;
set_builtin_decl (bcode, decl, true);
this->builtin_functions_[name] = decl;
if (libname != NULL)
{
decl = add_builtin_function (libname, fntype, bcode, BUILT_IN_NORMAL,
NULL, NULL_TREE);
if ((flags & builtin_const) != 0)
TREE_READONLY (decl) = 1;
if ((flags & builtin_noreturn) != 0)
TREE_THIS_VOLATILE (decl) = 1;
if ((flags & builtin_novops) != 0)
DECL_IS_NOVOPS (decl) = 1;
this->builtin_functions_[libname] = decl;
}
rust_intrinsic_to_gcc_builtin[rust_name] = name;
}
bool lookup_gcc_builtin (const std::string &name, tree *builtin)
{
auto it = builtin_functions_.find (name);
if (it == builtin_functions_.end ())
return false;
*builtin = it->second;
return true;
}
// A mapping of the GCC built-ins exposed to GCC Rust.
std::map<std::string, tree> builtin_functions_;
std::map<std::string, std::string> rust_intrinsic_to_gcc_builtin;
};
} // namespace Compile
} // namespace Rust
#endif // RUST_BUILTINS_H
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