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Diffstat (limited to 'gcc/rust/backend/rust-builtins.h')
| -rw-r--r-- | gcc/rust/backend/rust-builtins.h | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/gcc/rust/backend/rust-builtins.h b/gcc/rust/backend/rust-builtins.h new file mode 100644 index 0000000..2bfa6c6 --- /dev/null +++ b/gcc/rust/backend/rust-builtins.h @@ -0,0 +1,189 @@ +// 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 |