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(* *********************************************************************)
(* *)
(* The Compcert verified compiler *)
(* *)
(* Xavier Leroy, Collège de France and INRIA Paris *)
(* *)
(* Copyright Institut National de Recherche en Informatique et en *)
(* Automatique. All rights reserved. This file is distributed *)
(* under the terms of the GNU Lesser General Public License as *)
(* published by the Free Software Foundation, either version 2.1 of *)
(* the License, or (at your option) any later version. *)
(* This file is also distributed under the terms of the *)
(* INRIA Non-Commercial License Agreement. *)
(* *)
(* *********************************************************************)
(* Processor-dependent builtin C functions *)
open C
(* AAPCS64:
va_list is a struct of size 32 and alignment 8, passed by reference
Apple:
va_list is a pointer (size 8, alignment 8), passed by reference *)
let (va_list_type, size_va_list, va_list_scalar) =
match Archi.abi with
| Archi.AAPCS64 -> (TArray(TInt(IULong, []), Some 4L, []), 32, false)
| Archi.Apple -> (TPtr(TVoid [], []), 8, true)
(* Some macOS headers use the GCC built-in types "__int128_t" and
"__uint128_t" unconditionally. Provide a dummy definition. *)
let int128_type = TArray(TInt(IULong, []), Some 2L, [])
let builtins = {
builtin_typedefs =
[ "__builtin_va_list", va_list_type ] @
(if Configuration.system = "macos" then
[ "__int128_t", int128_type;
"__uint128_t", int128_type ]
else []);
builtin_functions = [
(* Synchronization *)
"__builtin_fence",
(TVoid [], [], false);
(* Integer arithmetic *)
"__builtin_cls",
(TInt(IInt, []), [TInt(IInt, [])], false);
"__builtin_clsl",
(TInt(IInt, []), [TInt(ILong, [])], false);
"__builtin_clsll",
(TInt(IInt, []), [TInt(ILongLong, [])], false);
(* Float arithmetic *)
"__builtin_fmadd",
(TFloat(FDouble, []),
[TFloat(FDouble, []); TFloat(FDouble, []); TFloat(FDouble, [])],
false);
"__builtin_fmsub",
(TFloat(FDouble, []),
[TFloat(FDouble, []); TFloat(FDouble, []); TFloat(FDouble, [])],
false);
"__builtin_fnmadd",
(TFloat(FDouble, []),
[TFloat(FDouble, []); TFloat(FDouble, []); TFloat(FDouble, [])],
false);
"__builtin_fnmsub",
(TFloat(FDouble, []),
[TFloat(FDouble, []); TFloat(FDouble, []); TFloat(FDouble, [])],
false);
"__builtin_fmax",
(TFloat(FDouble, []), [TFloat(FDouble, []); TFloat(FDouble, [])], false);
"__builtin_fmin",
(TFloat(FDouble, []), [TFloat(FDouble, []); TFloat(FDouble, [])], false);
]
}
(* Expand memory references inside extended asm statements. Used in C2C. *)
let asm_mem_argument arg = Printf.sprintf "[%s]" arg
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