1/* Test .type directives on assembler functions.
2
3Copyright 2001 Free Software Foundation, Inc.
4
5This file is part of the GNU MP Library.
6
7The GNU MP Library is free software; you can redistribute it and/or modify
8it under the terms of the GNU Lesser General Public License as published by
9the Free Software Foundation; either version 3 of the License, or (at your
10option) any later version.
11
12The GNU MP Library is distributed in the hope that it will be useful, but
13WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
15License for more details.
16
17You should have received a copy of the GNU Lesser General Public License
18along with the GNU MP Library.  If not, see http://www.gnu.org/licenses/.  */
19
20#include <stdio.h>
21#include <stdlib.h>
22
23#include "gmp.h"
24#include "gmp-impl.h"
25
26#include "tests.h"
27
28
29/* This apparently trivial test is designed to detect missing .type and
30   .size directives in asm code, per the problem described under
31   GMP_ASM_TYPE in acinclude.m4.
32
33   A failure can be provoked in a shared or shared+static build by making
34   TYPE and SIZE in config.m4 empty, either by editing it or by configuring
35   with
36
37       ./configure gmp_cv_asm_type= gmp_cv_asm_size=
38
39   mpn_add_n is used for the test because normally it's implemented in
40   assembler on a CPU that has any asm code.
41
42   Enhancement: As noted with GMP_ASM_TYPE, if .type is wrong but .size is
43   right then everything works, but uses code copied down to the mainline
44   data area.  Maybe we could detect that if we built a test library with an
45   object that had .size deliberately disabled.  */
46
47int
48main (void)
49{
50  static const mp_limb_t x[3]    = { 1, 2, 3 };
51  static const mp_limb_t y[3]    = { 4, 5, 6 };
52  static const mp_limb_t want[3] = { 5, 7, 9 };
53  mp_limb_t  got[3];
54
55  mpn_add_n (got, x, y, (mp_size_t) 3);
56
57  if (refmpn_cmp (got, want, (mp_size_t) 3) != 0)
58    {
59      printf ("Wrong result from mpn_add_n\n");
60      abort ();
61    }
62
63  exit (0);
64}
65