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/*
Copyright (C) 2023 Albin Ahlbäck
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#ifndef LONGLONG_MSC_H
#define LONGLONG_MSC_H
#include <stdlib.h>
#include <intrin.h>
#include <immintrin.h>
/* Trailing and leading zeros */
# define flint_clz _CountLeadingZeros64
# define flint_ctz flint_ctz
static inline int flint_ctz(ulong x)
{
unsigned long int index;
_BitScanForward64(&index, x);
return index;
}
/* Multiplication */
#define umul_ppmm(r1, r0, u, v) \
do \
{ \
(r0) = (u) * (v); \
(r1) = __umulh(u, v); \
} while (0)
#define smul_ppmm(r1, r0, u, v) \
do \
{ \
(r0) = (u) * (v); \
(r1) = __mulh(u, v); \
} while (0)
#endif