diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2019-08-20 20:51:06 +0000 | 
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2019-08-20 20:51:06 +0000 | 
| commit | 8f3cadc28cb2bb9e8f9d69eeaaea1f57f2f7b2ab (patch) | |
| tree | 05a2b6ec297fe6283d9557c791445d1daf88dcd0 /lib/builtins/moddi3.c | |
| parent | 63714eb5809e39666dec2454c354195e76f916ba (diff) | |
Notes
Diffstat (limited to 'lib/builtins/moddi3.c')
| -rw-r--r-- | lib/builtins/moddi3.c | 46 | 
1 files changed, 21 insertions, 25 deletions
diff --git a/lib/builtins/moddi3.c b/lib/builtins/moddi3.c index a04279e3875f..92b0996077c6 100644 --- a/lib/builtins/moddi3.c +++ b/lib/builtins/moddi3.c @@ -1,30 +1,26 @@ -/*===-- moddi3.c - Implement __moddi3 -------------------------------------=== - * - *                    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 __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 */ -    du_int r; -    __udivmoddi4(a, b, &r); -    return ((di_int)r ^ s) - s;                /* negate if s == -1 */ +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 +  du_int r; +  __udivmoddi4(a, b, &r); +  return ((di_int)r ^ s) - s; // negate if s == -1  }  | 
