tests/include/machine/t_bswap.c

   1 /* $NetBSD: t_bswap.c,v 1.1 2011/05/05 05:39:11 jruoho Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2011 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jukka Ruohonen.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31 #include <sys/cdefs.h>
  32 __RCSID("$NetBSD: t_bswap.c,v 1.1 2011/05/05 05:39:11 jruoho Exp $");
  33
  34 #include <sys/types.h>
  35 #include <machine/bswap.h>
  36
  37 #include <atf-c.h>
  38
  39 static uint16_t x16;
  40 static uint32_t x32;
  41 static uint64_t x64;
  42
  43 static uint16_t unconst16(uint16_t);
  44 static uint32_t unconst32(uint32_t);
  45 static uint64_t unconst64(uint64_t);
  46
  47 /*
  48  * Given the use of __builtin_constant_p(3),
  49  * these functions try to avoid gcc(1) from
  50  * treating the arguments as constants.
  51  */
  52 static uint16_t
  53 unconst16(uint16_t val)
  54 {
  55         return val + x16;
  56 }
  57
  58 static uint32_t
  59 unconst32(uint32_t val)
  60 {
  61         return val + x32;
  62 }
  63
  64 static uint64_t
  65 unconst64(uint64_t val)
  66 {
  67         return val + x64;
  68 }
  69
  70 ATF_TC(bswap16_basic);
  71 ATF_TC_HEAD(bswap16_basic, tc)
  72 {
  73         atf_tc_set_md_var(tc, "descr", "A naive test of bswap16(3), #1");
  74 }
  75
  76 ATF_TC_BODY(bswap16_basic, tc)
  77 {
  78         ATF_REQUIRE_EQ(bswap16(0x0000), 0x0000);
  79         ATF_REQUIRE_EQ(bswap16(0xff00), 0x00ff);
  80         ATF_REQUIRE_EQ(bswap16(0xffff), 0xffff);
  81         ATF_REQUIRE_EQ(bswap16(0x1234), 0x3412);
  82 }
  83
  84 ATF_TC(bswap16_unconst);
  85 ATF_TC_HEAD(bswap16_unconst, tc)
  86 {
  87         atf_tc_set_md_var(tc, "descr", "A naive test of bswap16(3), #2");
  88 }
  89
  90 ATF_TC_BODY(bswap16_unconst, tc)
  91 {
  92         x16 = 0;
  93
  94         ATF_REQUIRE_EQ(bswap16(unconst16(0x0000)), 0x0000);
  95         ATF_REQUIRE_EQ(bswap16(unconst16(0xff00)), 0x00ff);
  96         ATF_REQUIRE_EQ(bswap16(unconst16(0xffff)), 0xffff);
  97         ATF_REQUIRE_EQ(bswap16(unconst16(0x1234)), 0x3412);
  98 }
  99
 100 ATF_TC(bswap32_basic);
 101 ATF_TC_HEAD(bswap32_basic, tc)
 102 {
 103         atf_tc_set_md_var(tc, "descr", "A naive test of bswap32(3), #1");
 104 }
 105
 106 ATF_TC_BODY(bswap32_basic, tc)
 107 {
 108         ATF_REQUIRE_EQ(bswap32(0x00000000), 0x00000000);
 109         ATF_REQUIRE_EQ(bswap32(0xffff0000), 0x0000ffff);
 110         ATF_REQUIRE_EQ(bswap32(0xffffffff), 0xffffffff);
 111         ATF_REQUIRE_EQ(bswap32(0x12345678), 0x78563412);
 112 }
 113
 114 ATF_TC(bswap32_unconst);
 115 ATF_TC_HEAD(bswap32_unconst, tc)
 116 {
 117         atf_tc_set_md_var(tc, "descr", "A naive test of bswap32(3), #2");
 118 }
 119
 120 ATF_TC_BODY(bswap32_unconst, tc)
 121 {
 122         x32 = 0;
 123
 124         ATF_REQUIRE_EQ(bswap32(unconst32(0x00000000)), 0x00000000);
 125         ATF_REQUIRE_EQ(bswap32(unconst32(0xffff0000)), 0x0000ffff);
 126         ATF_REQUIRE_EQ(bswap32(unconst32(0xffffffff)), 0xffffffff);
 127         ATF_REQUIRE_EQ(bswap32(unconst32(0x12345678)), 0x78563412);
 128 }
 129
 130 ATF_TC(bswap64_basic);
 131 ATF_TC_HEAD(bswap64_basic, tc)
 132 {
 133         atf_tc_set_md_var(tc, "descr", "A naive test of bswap64(3), #1");
 134 }
 135
 136 ATF_TC_BODY(bswap64_basic, tc)
 137 {
 138         ATF_REQUIRE_EQ(bswap64(0x0000000000000000), 0x0000000000000000);
 139         ATF_REQUIRE_EQ(bswap64(0xffffffff00000000), 0x00000000ffffffff);
 140         ATF_REQUIRE_EQ(bswap64(0xffffffffffffffff), 0xffffffffffffffff);
 141         ATF_REQUIRE_EQ(bswap64(0x123456789abcdeff), 0xffdebc9a78563412);
 142 }
 143
 144 ATF_TC(bswap64_unconst);
 145 ATF_TC_HEAD(bswap64_unconst, tc)
 146 {
 147         atf_tc_set_md_var(tc, "descr", "A naive test of bswap64(3), #2");
 148 }
 149
 150 ATF_TC_BODY(bswap64_unconst, tc)
 151 {
 152         x64 = 0;
 153
 154         ATF_REQUIRE_EQ(bswap64(unconst64(0x0000000000000000)),
 155             0x0000000000000000);
 156
 157         ATF_REQUIRE_EQ(bswap64(unconst64(0xffffffff00000000)),
 158             0x00000000ffffffff);
 159
 160         ATF_REQUIRE_EQ(bswap64(unconst64(0xffffffffffffffff)),
 161             0xffffffffffffffff);
 162
 163         ATF_REQUIRE_EQ(bswap64(unconst64(0x123456789abcdeff)),
 164             0xffdebc9a78563412);
 165 }
 166
 167 ATF_TP_ADD_TCS(tp)
 168 {
 169
 170         ATF_TP_ADD_TC(tp, bswap16_basic);
 171         ATF_TP_ADD_TC(tp, bswap16_unconst);
 172         ATF_TP_ADD_TC(tp, bswap32_basic);
 173         ATF_TP_ADD_TC(tp, bswap32_unconst);
 174         ATF_TP_ADD_TC(tp, bswap64_basic);
 175         ATF_TP_ADD_TC(tp, bswap64_unconst);
 176
 177         return atf_no_error();
 178 }