diff options
Diffstat (limited to 'compiler-rt/lib/builtins/moddi3.c')
| -rw-r--r-- | compiler-rt/lib/builtins/moddi3.c | 35 |
1 files changed, 17 insertions, 18 deletions
diff --git a/compiler-rt/lib/builtins/moddi3.c b/compiler-rt/lib/builtins/moddi3.c index a2e7e72bd60..92b0996077c 100644 --- a/compiler-rt/lib/builtins/moddi3.c +++ b/compiler-rt/lib/builtins/moddi3.c @@ -1,27 +1,26 @@ -/*===-- moddi3.c - Implement __moddi3 -------------------------------------=== - * - * 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 __moddi3 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ +//===-- moddi3.c - Implement __moddi3 -------------------------------------===// +// +// 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 __moddi3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// #include "int_lib.h" -/* Returns: a % b */ +// Returns: a % b COMPILER_RT_ABI di_int __moddi3(di_int a, di_int b) { const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1; - di_int s = b >> bits_in_dword_m1; /* s = b < 0 ? -1 : 0 */ - b = (b ^ s) - s; /* negate if s == -1 */ - s = a >> bits_in_dword_m1; /* s = a < 0 ? -1 : 0 */ - a = (a ^ s) - s; /* negate if s == -1 */ + di_int s = b >> bits_in_dword_m1; // s = b < 0 ? -1 : 0 + b = (b ^ s) - s; // negate if s == -1 + s = a >> bits_in_dword_m1; // s = a < 0 ? -1 : 0 + a = (a ^ s) - s; // negate if s == -1 du_int r; __udivmoddi4(a, b, &r); - return ((di_int)r ^ s) - s; /* negate if s == -1 */ + return ((di_int)r ^ s) - s; // negate if s == -1 } |
