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/* ===-- modti3.c - Implement __modti3 -------------------------------------===
*
* 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 __modti3 for the compiler_rt library.
*
* ===----------------------------------------------------------------------===
*/
#include "int_lib.h"
#if __x86_64
tu_int __udivmodti4(tu_int a, tu_int b, tu_int* rem);
/*Returns: a % b */
ti_int
__modti3(ti_int a, ti_int b)
{
const int bits_in_tword_m1 = (int)(sizeof(ti_int) * CHAR_BIT) - 1;
ti_int s = b >> bits_in_tword_m1; /* s = b < 0 ? -1 : 0 */
b = (b ^ s) - s; /* negate if s == -1 */
s = a >> bits_in_tword_m1; /* s = a < 0 ? -1 : 0 */
a = (a ^ s) - s; /* negate if s == -1 */
ti_int r;
__udivmodti4(a, b, (tu_int*)&r);
return (r ^ s) - s; /* negate if s == -1 */
}
#endif
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