diff options
Diffstat (limited to 'lib/builtins/ctzti2.c')
| -rw-r--r-- | lib/builtins/ctzti2.c | 44 |
1 files changed, 20 insertions, 24 deletions
diff --git a/lib/builtins/ctzti2.c b/lib/builtins/ctzti2.c index 45de68270..2a1312c84 100644 --- a/lib/builtins/ctzti2.c +++ b/lib/builtins/ctzti2.c @@ -1,33 +1,29 @@ -/* ===-- ctzti2.c - Implement __ctzti2 -------------------------------------=== - * - * 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 __ctzti2 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ +//===-- ctzti2.c - Implement __ctzti2 -------------------------------------===// +// +// 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 __ctzti2 for the compiler_rt library. +// +//===----------------------------------------------------------------------===// #include "int_lib.h" #ifdef CRT_HAS_128BIT -/* Returns: the number of trailing 0-bits */ +// Returns: the number of trailing 0-bits -/* Precondition: a != 0 */ +// Precondition: a != 0 -COMPILER_RT_ABI si_int -__ctzti2(ti_int a) -{ - twords x; - x.all = a; - const di_int f = -(x.s.low == 0); - return __builtin_ctzll((x.s.high & f) | (x.s.low & ~f)) + - ((si_int)f & ((si_int)(sizeof(di_int) * CHAR_BIT))); +COMPILER_RT_ABI si_int __ctzti2(ti_int a) { + twords x; + x.all = a; + const di_int f = -(x.s.low == 0); + return __builtin_ctzll((x.s.high & f) | (x.s.low & ~f)) + + ((si_int)f & ((si_int)(sizeof(di_int) * CHAR_BIT))); } -#endif /* CRT_HAS_128BIT */ +#endif // CRT_HAS_128BIT |