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//===-- moddi3.c - Implement __moddi3 -------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements __moddi3 for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
du_int __udivmoddi4(du_int a, du_int b, du_int* rem);
// Returns: a % b
di_int
__moddi3(di_int a, di_int b)
{
const int bits_in_dword_m1 = (int)(sizeof(di_int) * CHAR_BIT) - 1;
di_int s = b >> bits_in_dword_m1; // s = b < 0 ? -1 : 0
b = (b ^ s) - s; // negate if s == -1
s = a >> bits_in_dword_m1; // s = a < 0 ? -1 : 0
a = (a ^ s) - s; // negate if s == -1
di_int r;
__udivmoddi4(a, b, (du_int*)&r);
return (r ^ s) - s; // negate if s == -1
}
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