--- /dev/null
+/* Test fat binary setups.
+
+Copyright 2003 Free Software Foundation, Inc.
+
+This file is part of the GNU MP Library.
+
+The GNU MP Library is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 3 of the License, or (at your
+option) any later version.
+
+The GNU MP Library is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "gmp.h"
+#include "gmp-impl.h"
+#include "longlong.h"
+#include "tests.h"
+
+
+/* In this program we're aiming to pick up certain subtle problems that
+ might creep into a fat binary.
+
+ 1. We want to ensure the application entry point routines like
+ __gmpn_add_n dispatch to the correct field of __gmpn_cpuvec.
+
+ Note that these routines are not exercised as a side effect of other
+ tests (eg. the mpz routines). Internally the fields of __gmpn_cpuvec
+ are used directly, so we need to write test code explicitly calling
+ the mpn functions, like an application will have.
+
+ 2. We want to ensure the initial __gmpn_cpuvec data has the initializer
+ function pointers in the correct fields, and that those initializer
+ functions dispatch to their correct corresponding field once
+ initialization has been done.
+
+ Only one of the initializer routines executes in a normal program,
+ since that routine sets all the pointers to actual mpn functions. We
+ forcibly reset __gmpn_cpuvec so we can run each.
+
+ In both cases for the above, the data put through the functions is
+ nothing special, just enough to verify that for instance an add_n is
+ really doing an add_n and has not for instance mistakenly gone to sub_n
+ or something.
+
+ The loop around each test will exercise the initializer routine on the
+ first iteration, and the dispatcher routine on the second.
+
+ If the dispatcher and/or initializer routines are generated mechanically
+ via macros (eg. mpn/x86/fat/fat_entry.asm) then there shouldn't be too
+ much risk of them going wrong, provided the structure layout is correctly
+ expressed. But if they're in C then it's good to guard against typos in
+ what is rather repetitive code. The initializer data for __gmpn_cpuvec
+ in fat.c is always done by hand and is likewise a bit repetitive. */
+
+
+/* dummies when not a fat binary */
+#if ! WANT_FAT_BINARY
+struct cpuvec_t {
+ int initialized;
+};
+struct cpuvec_t __gmpn_cpuvec;
+#define ITERATE_FAT_THRESHOLDS() do { } while (0)
+#endif
+
+/* saved from program startup */
+struct cpuvec_t initial_cpuvec;
+
+void
+check_functions (void)
+{
+ mp_limb_t wp[2], xp[2], yp[2], r;
+ int i;
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 123;
+ yp[0] = 456;
+ mpn_add_n (wp, xp, yp, (mp_size_t) 1);
+ ASSERT_ALWAYS (wp[0] == 579);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 123;
+ wp[0] = 456;
+ r = mpn_addmul_1 (wp, xp, (mp_size_t) 1, CNST_LIMB(2));
+ ASSERT_ALWAYS (wp[0] == 702);
+ ASSERT_ALWAYS (r == 0);
+ }
+
+#if HAVE_NATIVE_mpn_copyd
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 123;
+ xp[1] = 456;
+ mpn_copyd (xp+1, xp, (mp_size_t) 1);
+ ASSERT_ALWAYS (xp[1] == 123);
+ }
+#endif
+
+#if HAVE_NATIVE_mpn_copyi
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 123;
+ xp[1] = 456;
+ mpn_copyi (xp, xp+1, (mp_size_t) 1);
+ ASSERT_ALWAYS (xp[0] == 456);
+ }
+#endif
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 1605;
+ mpn_divexact_1 (wp, xp, (mp_size_t) 1, CNST_LIMB(5));
+ ASSERT_ALWAYS (wp[0] == 321);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 1296;
+ r = mpn_divexact_by3c (wp, xp, (mp_size_t) 1, CNST_LIMB(0));
+ ASSERT_ALWAYS (wp[0] == 432);
+ ASSERT_ALWAYS (r == 0);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 287;
+ r = mpn_divrem_1 (wp, (mp_size_t) 1, xp, (mp_size_t) 1, CNST_LIMB(7));
+ ASSERT_ALWAYS (wp[1] == 41);
+ ASSERT_ALWAYS (wp[0] == 0);
+ ASSERT_ALWAYS (r == 0);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 12;
+ r = mpn_gcd_1 (xp, (mp_size_t) 1, CNST_LIMB(9));
+ ASSERT_ALWAYS (r == 3);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 0x1001;
+ mpn_lshift (wp, xp, (mp_size_t) 1, 1);
+ ASSERT_ALWAYS (wp[0] == 0x2002);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 14;
+ r = mpn_mod_1 (xp, (mp_size_t) 1, CNST_LIMB(4));
+ ASSERT_ALWAYS (r == 2);
+ }
+
+#if (GMP_NUMB_BITS % 4) == 0
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ int bits = (GMP_NUMB_BITS / 4) * 3;
+ mp_limb_t mod = (CNST_LIMB(1) << bits) - 1;
+ mp_limb_t want = GMP_NUMB_MAX % mod;
+ xp[0] = GMP_NUMB_MAX;
+ r = mpn_mod_34lsub1 (xp, (mp_size_t) 1);
+ ASSERT_ALWAYS (r % mod == want);
+ }
+#endif
+
+ /* DECL_modexact_1c_odd ((*modexact_1c_odd)); */
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 14;
+ r = mpn_mul_1 (wp, xp, (mp_size_t) 1, CNST_LIMB(4));
+ ASSERT_ALWAYS (wp[0] == 56);
+ ASSERT_ALWAYS (r == 0);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 5;
+ yp[0] = 7;
+ mpn_mul_basecase (wp, xp, (mp_size_t) 1, yp, (mp_size_t) 1);
+ ASSERT_ALWAYS (wp[0] == 35);
+ ASSERT_ALWAYS (wp[1] == 0);
+ }
+
+#if HAVE_NATIVE_mpn_preinv_divrem_1 && GMP_NAIL_BITS == 0
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 0x101;
+ r = mpn_preinv_divrem_1 (wp, (mp_size_t) 1, xp, (mp_size_t) 1,
+ GMP_LIMB_HIGHBIT,
+ refmpn_invert_limb (GMP_LIMB_HIGHBIT), 0);
+ ASSERT_ALWAYS (wp[0] == 0x202);
+ ASSERT_ALWAYS (wp[1] == 0);
+ ASSERT_ALWAYS (r == 0);
+ }
+#endif
+
+#if GMP_NAIL_BITS == 0
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = GMP_LIMB_HIGHBIT+123;
+ r = mpn_preinv_mod_1 (xp, (mp_size_t) 1, GMP_LIMB_HIGHBIT,
+ refmpn_invert_limb (GMP_LIMB_HIGHBIT));
+ ASSERT_ALWAYS (r == 123);
+ }
+#endif
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 0x8008;
+ mpn_rshift (wp, xp, (mp_size_t) 1, 1);
+ ASSERT_ALWAYS (wp[0] == 0x4004);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 5;
+ mpn_sqr_basecase (wp, xp, (mp_size_t) 1);
+ ASSERT_ALWAYS (wp[0] == 25);
+ ASSERT_ALWAYS (wp[1] == 0);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 999;
+ yp[0] = 666;
+ mpn_sub_n (wp, xp, yp, (mp_size_t) 1);
+ ASSERT_ALWAYS (wp[0] == 333);
+ }
+
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec));
+ for (i = 0; i < 2; i++)
+ {
+ xp[0] = 123;
+ wp[0] = 456;
+ r = mpn_submul_1 (wp, xp, (mp_size_t) 1, CNST_LIMB(2));
+ ASSERT_ALWAYS (wp[0] == 210);
+ ASSERT_ALWAYS (r == 0);
+ }
+}
+
+/* Expect the first use of a each fat threshold to invoke the necessary
+ initialization. */
+void
+check_thresholds (void)
+{
+#define ITERATE(name,field) \
+ do { \
+ memcpy (&__gmpn_cpuvec, &initial_cpuvec, sizeof (__gmpn_cpuvec)); \
+ ASSERT_ALWAYS (name != 0); \
+ ASSERT_ALWAYS (name == __gmpn_cpuvec.field); \
+ ASSERT_ALWAYS (__gmpn_cpuvec.initialized); \
+ } while (0)
+
+ ITERATE_FAT_THRESHOLDS ();
+}
+
+
+int
+main (void)
+{
+ memcpy (&initial_cpuvec, &__gmpn_cpuvec, sizeof (__gmpn_cpuvec));
+
+ tests_start ();
+
+ check_functions ();
+ check_thresholds ();
+
+ tests_end ();
+ exit (0);
+}
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