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authorJordan Rupprecht <rupprecht@google.com>2019-05-14 21:58:59 +0000
committerJordan Rupprecht <rupprecht@google.com>2019-05-14 21:58:59 +0000
commitb6bc976d7be8ee56d3be4b6dbd2f3ab0a4021c86 (patch)
treef5ed5db8cb5d237a073ea00c4d4cd63153a16a6c /lib/builtins/ashrdi3.c
parent05342ccc9cff16425c0a831fddd510879544a0bf (diff)
parent098ca93185735ec3687106d0967a70fc99a85059 (diff)
downloadcompiler-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/ashrdi3.c')
-rw-r--r--lib/builtins/ashrdi3.c67
1 files changed, 30 insertions, 37 deletions
diff --git a/lib/builtins/ashrdi3.c b/lib/builtins/ashrdi3.c
index 84619965e..b99391322 100644
--- a/lib/builtins/ashrdi3.c
+++ b/lib/builtins/ashrdi3.c
@@ -1,46 +1,39 @@
-/*===-- ashrdi3.c - Implement __ashrdi3 -----------------------------------===
- *
- * 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 __ashrdi3 for the compiler_rt library.
- *
- * ===----------------------------------------------------------------------===
- */
+//===-- ashrdi3.c - Implement __ashrdi3 -----------------------------------===//
+//
+// 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 __ashrdi3 for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
#include "int_lib.h"
-/* Returns: arithmetic a >> b */
+// Returns: arithmetic a >> b
-/* Precondition: 0 <= b < bits_in_dword */
+// Precondition: 0 <= b < bits_in_dword
-COMPILER_RT_ABI di_int
-__ashrdi3(di_int a, si_int b)
-{
- const int bits_in_word = (int)(sizeof(si_int) * CHAR_BIT);
- dwords input;
- dwords result;
- input.all = a;
- if (b & bits_in_word) /* bits_in_word <= b < bits_in_dword */
- {
- /* result.s.high = input.s.high < 0 ? -1 : 0 */
- result.s.high = input.s.high >> (bits_in_word - 1);
- result.s.low = input.s.high >> (b - bits_in_word);
- }
- else /* 0 <= b < bits_in_word */
- {
- if (b == 0)
- return a;
- result.s.high = input.s.high >> b;
- result.s.low = (input.s.high << (bits_in_word - b)) | (input.s.low >> b);
- }
- return result.all;
+COMPILER_RT_ABI di_int __ashrdi3(di_int a, si_int b) {
+ const int bits_in_word = (int)(sizeof(si_int) * CHAR_BIT);
+ dwords input;
+ dwords result;
+ input.all = a;
+ if (b & bits_in_word) /* bits_in_word <= b < bits_in_dword */ {
+ // result.s.high = input.s.high < 0 ? -1 : 0
+ result.s.high = input.s.high >> (bits_in_word - 1);
+ result.s.low = input.s.high >> (b - bits_in_word);
+ } else /* 0 <= b < bits_in_word */ {
+ if (b == 0)
+ return a;
+ result.s.high = input.s.high >> b;
+ result.s.low = (input.s.high << (bits_in_word - b)) | (input.s.low >> b);
+ }
+ return result.all;
}
#if defined(__ARM_EABI__)
-AEABI_RTABI di_int __aeabi_lasr(di_int a, si_int b) COMPILER_RT_ALIAS(__ashrdi3);
+COMPILER_RT_ALIAS(__ashrdi3, __aeabi_lasr)
#endif