1 /* ===-- ashlti3.c - Implement __ashlti3 -----------------------------------===
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 __ashlti3 for the compiler_rt library.
12 * ===----------------------------------------------------------------------===
21 /* Precondition: 0 <= b < bits_in_tword */
23 COMPILER_RT_ABI ti_int
24 __ashlti3(ti_int a, si_int b)
26 const int bits_in_dword = (int)(sizeof(di_int) * CHAR_BIT);
30 if (b & bits_in_dword) /* bits_in_dword <= b < bits_in_tword */
33 result.s.high = input.s.low << (b - bits_in_dword);
35 else /* 0 <= b < bits_in_dword */
39 result.s.low = input.s.low << b;
40 result.s.high = (input.s.high << b) | (input.s.low >> (bits_in_dword - b));
45 #endif /* CRT_HAS_128BIT */