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9441de4c38
This release is used in conjunction with the linux-sgx-driver Intial release: https://github.com/01org/linux-sgx-driver commit-id: 0e865ce5e6b297a787bcdc12d98bada8174be6d7 Intel-id: 33399 Signed-off-by: Angie Chinchilla <angie.v.chinchilla@intel.com>
30 lines
826 B
C
30 lines
826 B
C
/* ===-- clzdi2.c - Implement __clzdi2 -------------------------------------===
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*
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* The LLVM Compiler Infrastructure
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*
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* This file is dual licensed under the MIT and the University of Illinois Open
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* Source Licenses. See LICENSE.TXT for details.
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*
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* ===----------------------------------------------------------------------===
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*
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* This file implements __clzdi2 for the compiler_rt library.
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*
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* ===----------------------------------------------------------------------===
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*/
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#include "int_lib.h"
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/* Returns: the number of leading 0-bits */
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/* Precondition: a != 0 */
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COMPILER_RT_ABI si_int
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__clzdi2(di_int a)
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{
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dwords x;
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x.all = a;
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const si_int f = -(x.s.high == 0);
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return __builtin_clz((x.s.high & ~f) | (x.s.low & f)) +
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(f & ((si_int)(sizeof(si_int) * CHAR_BIT)));
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}
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