10b57cec5SDimitry Andric // ====-- ashldi3.c - Implement __ashldi3 ---------------------------------===// 20b57cec5SDimitry Andric // 30b57cec5SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 40b57cec5SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 50b57cec5SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 60b57cec5SDimitry Andric // 70b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 80b57cec5SDimitry Andric // 90b57cec5SDimitry Andric // This file implements __ashldi3 for the compiler_rt library. 100b57cec5SDimitry Andric // 110b57cec5SDimitry Andric //===----------------------------------------------------------------------===// 120b57cec5SDimitry Andric 130b57cec5SDimitry Andric #include "int_lib.h" 140b57cec5SDimitry Andric 150b57cec5SDimitry Andric // Returns: a << b 160b57cec5SDimitry Andric 170b57cec5SDimitry Andric // Precondition: 0 <= b < bits_in_dword 180b57cec5SDimitry Andric 195ffd83dbSDimitry Andric COMPILER_RT_ABI di_int __ashldi3(di_int a, int b) { 200b57cec5SDimitry Andric const int bits_in_word = (int)(sizeof(si_int) * CHAR_BIT); 210b57cec5SDimitry Andric dwords input; 220b57cec5SDimitry Andric dwords result; 230b57cec5SDimitry Andric input.all = a; 240b57cec5SDimitry Andric if (b & bits_in_word) /* bits_in_word <= b < bits_in_dword */ { 250b57cec5SDimitry Andric result.s.low = 0; 260b57cec5SDimitry Andric result.s.high = input.s.low << (b - bits_in_word); 270b57cec5SDimitry Andric } else /* 0 <= b < bits_in_word */ { 280b57cec5SDimitry Andric if (b == 0) 290b57cec5SDimitry Andric return a; 300b57cec5SDimitry Andric result.s.low = input.s.low << b; 31*5f757f3fSDimitry Andric result.s.high = 32*5f757f3fSDimitry Andric ((su_int)input.s.high << b) | (input.s.low >> (bits_in_word - b)); 330b57cec5SDimitry Andric } 340b57cec5SDimitry Andric return result.all; 350b57cec5SDimitry Andric } 360b57cec5SDimitry Andric 370b57cec5SDimitry Andric #if defined(__ARM_EABI__) 380b57cec5SDimitry Andric COMPILER_RT_ALIAS(__ashldi3, __aeabi_llsl) 390b57cec5SDimitry Andric #endif 40