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/*
* Copyright 2009-2022 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the Apache License 2.0 (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include <openssl/crypto.h>
#include <openssl/bn.h>
#include "crypto/ppc_arch.h"
#include "bn_local.h"
int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
const BN_ULONG *np, const BN_ULONG *n0, int num)
{
int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
const BN_ULONG *np, const BN_ULONG *n0, int num);
int bn_mul4x_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
const BN_ULONG *np, const BN_ULONG *n0, int num);
if (num < 4)
return 0;
if ((num & 3) == 0)
return bn_mul4x_mont_int(rp, ap, bp, np, n0, num);
/*
* There used to be [optional] call to bn_mul_mont_fpu64 here,
* but above subroutine is faster on contemporary processors.
* Formulation means that there might be old processors where
* FPU code path would be faster, POWER6 perhaps, but there was
* no opportunity to figure it out...
*/
return bn_mul_mont_int(rp, ap, bp, np, n0, num);
}
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