Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* mpihelp-sub.c  -  MPI helper functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  *	Copyright (C) 1994, 1996 Free Software Foundation, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *	Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  * This file is part of GnuPG.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  * Note: This code is heavily based on the GNU MP Library.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *	 Actually it's the same code with only minor changes in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *	 way the data is stored; this is to support the abstraction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *	 of an optional secure memory allocation which may be used
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  *	 to avoid revealing of sensitive data due to paging etc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)  *	 The GNU MP Library itself is published under the LGPL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)  *	 however I decided to publish this code under the plain GPL.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "mpi-internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) /****************
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)  * Compare OP1_PTR/OP1_SIZE with OP2_PTR/OP2_SIZE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)  * There are no restrictions on the relative sizes of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)  * the two arguments.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)  * Return 1 if OP1 > OP2, 0 if they are equal, and -1 if OP1 < OP2.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int mpihelp_cmp(mpi_ptr_t op1_ptr, mpi_ptr_t op2_ptr, mpi_size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	mpi_size_t i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	mpi_limb_t op1_word, op2_word;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	for (i = size - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		op1_word = op1_ptr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		op2_word = op2_ptr[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		if (op1_word != op2_word)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			goto diff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) diff:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	/* This can *not* be simplified to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	 *   op2_word - op2_word
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	 * since that expression might give signed overflow.  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	return (op1_word > op2_word) ? 1 : -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }