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Diffstat (limited to 'lib/libcompiler_rt/clzdi2.c')
-rw-r--r-- | lib/libcompiler_rt/clzdi2.c | 40 |
1 files changed, 0 insertions, 40 deletions
diff --git a/lib/libcompiler_rt/clzdi2.c b/lib/libcompiler_rt/clzdi2.c deleted file mode 100644 index 1819e6be436..00000000000 --- a/lib/libcompiler_rt/clzdi2.c +++ /dev/null @@ -1,40 +0,0 @@ -/* ===-- clzdi2.c - Implement __clzdi2 -------------------------------------=== - * - * 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 __clzdi2 for the compiler_rt library. - * - * ===----------------------------------------------------------------------=== - */ - -#include "int_lib.h" - -/* Returns: the number of leading 0-bits */ - -#if !defined(__clang__) && \ - ((defined(__sparc__) && defined(__arch64__)) || \ - defined(__mips64) || \ - (defined(__riscv) && __SIZEOF_POINTER__ >= 8)) -/* On 64-bit architectures with neither a native clz instruction nor a native - * ctz instruction, gcc resolves __builtin_clz to __clzdi2 rather than - * __clzsi2, leading to infinite recursion. */ -#define __builtin_clz(a) __clzsi2(a) -extern si_int __clzsi2(si_int); -#endif - -/* Precondition: a != 0 */ - -COMPILER_RT_ABI si_int -__clzdi2(di_int a) -{ - dwords x; - x.all = a; - const si_int f = -(x.s.high == 0); - return __builtin_clz((x.s.high & ~f) | (x.s.low & f)) + - (f & ((si_int)(sizeof(si_int) * CHAR_BIT))); -} |