1 /* ====-- ashldi3.c - Implement __ashldi3 -----------------------------------===
3 * The LLVM Compiler Infrastructure
5 * This file is dual licensed under the MIT and the University of Illinois Open
6 * Source Licenses. See LICENSE.TXT for details.
8 * ===----------------------------------------------------------------------===
10 * This file implements __ashldi3 for the compiler_rt library.
12 * ===----------------------------------------------------------------------===
19 /* Precondition: 0 <= b < bits_in_dword */
21 COMPILER_RT_ABI di_int
22 __ashldi3(di_int a, si_int b)
24 const int bits_in_word = (int)(sizeof(si_int) * CHAR_BIT);
28 if (b & bits_in_word) /* bits_in_word <= b < bits_in_dword */
31 result.s.high = input.s.low << (b - bits_in_word);
33 else /* 0 <= b < bits_in_word */
37 result.s.low = input.s.low << b;
38 result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_word - b));
43 #if defined(__ARM_EABI__)
44 AEABI_RTABI di_int __aeabi_llsl(di_int a, si_int b) COMPILER_RT_ALIAS(__ashldi3);