diff options
Diffstat (limited to 'contrib/compiler-rt/lib/builtins/ashldi3.c')
-rw-r--r-- | contrib/compiler-rt/lib/builtins/ashldi3.c | 65 |
1 files changed, 29 insertions, 36 deletions
diff --git a/contrib/compiler-rt/lib/builtins/ashldi3.c b/contrib/compiler-rt/lib/builtins/ashldi3.c index a5c1836006b9..7c81057a2284 100644 --- a/contrib/compiler-rt/lib/builtins/ashldi3.c +++ b/contrib/compiler-rt/lib/builtins/ashldi3.c @@ -1,45 +1,38 @@ -/* ====-- ashldi3.c - Implement __ashldi3 -----------------------------------=== - * - * 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 __ashldi3 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ +// ====-- ashldi3.c - Implement __ashldi3 ---------------------------------===// +// +// 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 __ashldi3 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// #include "int_lib.h" -/* Returns: a << b */ +// Returns: a << b -/* Precondition: 0 <= b < bits_in_dword */ +// Precondition: 0 <= b < bits_in_dword -COMPILER_RT_ABI di_int -__ashldi3(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.low = 0; - result.s.high = input.s.low << (b - bits_in_word); - } - else /* 0 <= b < bits_in_word */ - { - if (b == 0) - return a; - result.s.low = input.s.low << b; - result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_word - b)); - } - return result.all; +COMPILER_RT_ABI di_int __ashldi3(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.low = 0; + result.s.high = input.s.low << (b - bits_in_word); + } else /* 0 <= b < bits_in_word */ { + if (b == 0) + return a; + result.s.low = input.s.low << b; + result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_word - b)); + } + return result.all; } #if defined(__ARM_EABI__) -AEABI_RTABI di_int __aeabi_llsl(di_int a, si_int b) COMPILER_RT_ALIAS(__ashldi3); +COMPILER_RT_ALIAS(__ashldi3, __aeabi_llsl) #endif |