1,13c1,11
< /* ===-- ctzdi2.c - Implement __ctzdi2 -------------------------------------===
< *
< * 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 __ctzdi2 for the compiler_rt library.
< *
< * ===----------------------------------------------------------------------===
< */
---
> //===-- ctzdi2.c - Implement __ctzdi2 -------------------------------------===//
> //
> // 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 __ctzdi2 for the compiler_rt library.
> //
> //===----------------------------------------------------------------------===//
17c15
< /* Returns: the number of trailing 0-bits */
---
> // Returns: the number of trailing 0-bits
20,21c18
< ((defined(__sparc__) && defined(__arch64__)) || \
< defined(__mips64) || \
---
> ((defined(__sparc__) && defined(__arch64__)) || defined(__mips64) || \
23,25c20,22
< /* On 64-bit architectures with neither a native clz instruction nor a native
< * ctz instruction, gcc resolves __builtin_ctz to __ctzdi2 rather than
< * __ctzsi2, leading to infinite recursion. */
---
> // On 64-bit architectures with neither a native clz instruction nor a native
> // ctz instruction, gcc resolves __builtin_ctz to __ctzdi2 rather than
> // __ctzsi2, leading to infinite recursion.
30c27
< /* Precondition: a != 0 */
---
> // Precondition: a != 0
32,39c29,34
< COMPILER_RT_ABI si_int
< __ctzdi2(di_int a)
< {
< dwords x;
< x.all = a;
< const si_int f = -(x.s.low == 0);
< return __builtin_ctz((x.s.high & f) | (x.s.low & ~f)) +
< (f & ((si_int)(sizeof(si_int) * CHAR_BIT)));
---
> COMPILER_RT_ABI si_int __ctzdi2(di_int a) {
> dwords x;
> x.all = a;
> const si_int f = -(x.s.low == 0);
> return __builtin_ctz((x.s.high & f) | (x.s.low & ~f)) +
> (f & ((si_int)(sizeof(si_int) * CHAR_BIT)));