diff options
author | Jordan Rupprecht <rupprecht@google.com> | 2019-05-14 21:58:59 +0000 |
---|---|---|
committer | Jordan Rupprecht <rupprecht@google.com> | 2019-05-14 21:58:59 +0000 |
commit | b6bc976d7be8ee56d3be4b6dbd2f3ab0a4021c86 (patch) | |
tree | f5ed5db8cb5d237a073ea00c4d4cd63153a16a6c /lib/builtins/ashlti3.c | |
parent | 05342ccc9cff16425c0a831fddd510879544a0bf (diff) | |
parent | 098ca93185735ec3687106d0967a70fc99a85059 (diff) | |
download | compiler-rt-google/stable.tar.gz |
Creating branches/google/stable and tags/google/stable/2019-05-14 from r360103google/stable
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/branches/google/stable@360714 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/builtins/ashlti3.c')
-rw-r--r-- | lib/builtins/ashlti3.c | 65 |
1 files changed, 29 insertions, 36 deletions
diff --git a/lib/builtins/ashlti3.c b/lib/builtins/ashlti3.c index 638ae845f..2d7bd4a89 100644 --- a/lib/builtins/ashlti3.c +++ b/lib/builtins/ashlti3.c @@ -1,45 +1,38 @@ -/* ===-- ashlti3.c - Implement __ashlti3 -----------------------------------=== - * - * The LLVM Compiler Infrastructure - * - * This file is dual licensed under the MIT and the University of Illinois Open - * Source Licenses. See LICENSE.TXT for details. - * - * ===----------------------------------------------------------------------=== - * - * This file implements __ashlti3 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ +//===-- ashlti3.c - Implement __ashlti3 -----------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file implements __ashlti3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// #include "int_lib.h" #ifdef CRT_HAS_128BIT -/* Returns: a << b */ +// Returns: a << b -/* Precondition: 0 <= b < bits_in_tword */ +// Precondition: 0 <= b < bits_in_tword -COMPILER_RT_ABI ti_int -__ashlti3(ti_int a, si_int b) -{ - const int bits_in_dword = (int)(sizeof(di_int) * CHAR_BIT); - twords input; - twords result; - input.all = a; - if (b & bits_in_dword) /* bits_in_dword <= b < bits_in_tword */ - { - result.s.low = 0; - result.s.high = input.s.low << (b - bits_in_dword); - } - else /* 0 <= b < bits_in_dword */ - { - if (b == 0) - return a; - result.s.low = input.s.low << b; - result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_dword - b)); - } - return result.all; +COMPILER_RT_ABI ti_int __ashlti3(ti_int a, si_int b) { + const int bits_in_dword = (int)(sizeof(di_int) * CHAR_BIT); + twords input; + twords result; + input.all = a; + if (b & bits_in_dword) /* bits_in_dword <= b < bits_in_tword */ { + result.s.low = 0; + result.s.high = input.s.low << (b - bits_in_dword); + } else /* 0 <= b < bits_in_dword */ { + if (b == 0) + return a; + result.s.low = input.s.low << b; + result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_dword - b)); + } + return result.all; } -#endif /* CRT_HAS_128BIT */ +#endif // CRT_HAS_128BIT |