Commit c3f8962f authored by Alex Bennée's avatar Alex Bennée Committed by Richard Henderson
Browse files

tests: New test-bitcnt 



Add some unit tests for bit count functions (currently only ctpop). As
the routines are based on the Hackers Delight optimisations I based
the test patterns on their tests.

Signed-off-by: default avatarAlex Bennée <alex.bennee@linaro.org>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent 7bdcecb7

tests/.gitignore

+1 −0
Original line number Diff line number Diff line
@@ -13,6 +13,7 @@ rcutorture 
test-aio

test-base64

test-bitops

test-bitcnt

test-blockjob

test-blockjob-txn

test-bufferiszero

tests/Makefile.include

+2 −0
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ gcov-files-test-qht-y = util/qht.c 
check-unit-y += tests/test-qht-par$(EXESUF)

gcov-files-test-qht-par-y = util/qht.c

check-unit-y += tests/test-bitops$(EXESUF)

check-unit-y += tests/test-bitcnt$(EXESUF)

check-unit-$(CONFIG_HAS_GLIB_SUBPROCESS_TESTS) += tests/test-qdev-global-props$(EXESUF)

check-unit-y += tests/check-qom-interface$(EXESUF)

gcov-files-check-qom-interface-y = qom/object.c
@@ -571,6 +572,7 @@ tests/test-opts-visitor$(EXESUF): tests/test-opts-visitor.o $(test-qapi-obj-y) 


tests/test-mul64$(EXESUF): tests/test-mul64.o $(test-util-obj-y)

tests/test-bitops$(EXESUF): tests/test-bitops.o $(test-util-obj-y)

tests/test-bitcnt$(EXESUF): tests/test-bitcnt.o $(test-util-obj-y)

tests/test-crypto-hash$(EXESUF): tests/test-crypto-hash.o $(test-crypto-obj-y)

tests/test-crypto-hmac$(EXESUF): tests/test-crypto-hmac.o $(test-crypto-obj-y)

tests/test-crypto-cipher$(EXESUF): tests/test-crypto-cipher.o $(test-crypto-obj-y)

tests/test-bitcnt.c

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+140 −0
Original line number Diff line number Diff line 
/*

 * Test bit count routines

 *

 * This work is licensed under the terms of the GNU LGPL, version 2 or later.

 * See the COPYING.LIB file in the top-level directory.

 *

 */



#include "qemu/osdep.h"

#include "qemu/host-utils.h"



struct bitcnt_test_data {

    /* value to count */

    union {

        uint8_t  w8;

        uint16_t w16;

        uint32_t w32;

        uint64_t w64;

    } value;

    /* expected result */

    int popct;

};



struct bitcnt_test_data eight_bit_data[] = {

    { { .w8 = 0x00 }, .popct=0 },

    { { .w8 = 0x01 }, .popct=1 },

    { { .w8 = 0x03 }, .popct=2 },

    { { .w8 = 0x04 }, .popct=1 },

    { { .w8 = 0x0f }, .popct=4 },

    { { .w8 = 0x3f }, .popct=6 },

    { { .w8 = 0x40 }, .popct=1 },

    { { .w8 = 0xf0 }, .popct=4 },

    { { .w8 = 0x7f }, .popct=7 },

    { { .w8 = 0x80 }, .popct=1 },

    { { .w8 = 0xf1 }, .popct=5 },

    { { .w8 = 0xfe }, .popct=7 },

    { { .w8 = 0xff }, .popct=8 },

};



static void test_ctpop8(void)

{

    int i;



    for (i = 0; i < ARRAY_SIZE(eight_bit_data); i++) {

        struct bitcnt_test_data *d = &eight_bit_data[i];

        g_assert(ctpop8(d->value.w8)==d->popct);

    }

}



struct bitcnt_test_data sixteen_bit_data[] = {

    { { .w16 = 0x0000 }, .popct=0 },

    { { .w16 = 0x0001 }, .popct=1 },

    { { .w16 = 0x0003 }, .popct=2 },

    { { .w16 = 0x000f }, .popct=4 },

    { { .w16 = 0x003f }, .popct=6 },

    { { .w16 = 0x00f0 }, .popct=4 },

    { { .w16 = 0x0f0f }, .popct=8 },

    { { .w16 = 0x1f1f }, .popct=10 },

    { { .w16 = 0x4000 }, .popct=1 },

    { { .w16 = 0x4001 }, .popct=2 },

    { { .w16 = 0x7000 }, .popct=3 },

    { { .w16 = 0x7fff }, .popct=15 },

};



static void test_ctpop16(void)

{

    int i;



    for (i = 0; i < ARRAY_SIZE(sixteen_bit_data); i++) {

        struct bitcnt_test_data *d = &sixteen_bit_data[i];

        g_assert(ctpop16(d->value.w16)==d->popct);

    }

}



struct bitcnt_test_data thirtytwo_bit_data[] = {

    { { .w32 = 0x00000000 }, .popct=0 },

    { { .w32 = 0x00000001 }, .popct=1 },

    { { .w32 = 0x0000000f }, .popct=4 },

    { { .w32 = 0x00000f0f }, .popct=8 },

    { { .w32 = 0x00001f1f }, .popct=10 },

    { { .w32 = 0x00004001 }, .popct=2 },

    { { .w32 = 0x00007000 }, .popct=3 },

    { { .w32 = 0x00007fff }, .popct=15 },

    { { .w32 = 0x55555555 }, .popct=16 },

    { { .w32 = 0xaaaaaaaa }, .popct=16 },

    { { .w32 = 0xff000000 }, .popct=8 },

    { { .w32 = 0xc0c0c0c0 }, .popct=8 },

    { { .w32 = 0x0ffffff0 }, .popct=24 },

    { { .w32 = 0x80000000 }, .popct=1 },

    { { .w32 = 0xffffffff }, .popct=32 },

};



static void test_ctpop32(void)

{

    int i;



    for (i = 0; i < ARRAY_SIZE(thirtytwo_bit_data); i++) {

        struct bitcnt_test_data *d = &thirtytwo_bit_data[i];

        g_assert(ctpop32(d->value.w32)==d->popct);

    }

}



struct bitcnt_test_data sixtyfour_bit_data[] = {

    { { .w64 = 0x0000000000000000ULL }, .popct=0 },

    { { .w64 = 0x0000000000000001ULL }, .popct=1 },

    { { .w64 = 0x000000000000000fULL }, .popct=4 },

    { { .w64 = 0x0000000000000f0fULL }, .popct=8 },

    { { .w64 = 0x0000000000001f1fULL }, .popct=10 },

    { { .w64 = 0x0000000000004001ULL }, .popct=2 },

    { { .w64 = 0x0000000000007000ULL }, .popct=3 },

    { { .w64 = 0x0000000000007fffULL }, .popct=15 },

    { { .w64 = 0x0000005500555555ULL }, .popct=16 },

    { { .w64 = 0x00aa0000aaaa00aaULL }, .popct=16 },

    { { .w64 = 0x000f000000f00000ULL }, .popct=8 },

    { { .w64 = 0x0c0c0000c0c0c0c0ULL }, .popct=12 },

    { { .w64 = 0xf00f00f0f0f0f000ULL }, .popct=24 },

    { { .w64 = 0x8000000000000000ULL }, .popct=1 },

    { { .w64 = 0xf0f0f0f0f0f0f0f0ULL }, .popct=32 },

    { { .w64 = 0xffffffffffffffffULL }, .popct=64 },

};



static void test_ctpop64(void)

{

    int i;



    for (i = 0; i < ARRAY_SIZE(sixtyfour_bit_data); i++) {

        struct bitcnt_test_data *d = &sixtyfour_bit_data[i];

        g_assert(ctpop64(d->value.w64)==d->popct);

    }

}



int main(int argc, char **argv)

{

    g_test_init(&argc, &argv, NULL);

    g_test_add_func("/bitcnt/ctpop8", test_ctpop8);

    g_test_add_func("/bitcnt/ctpop16", test_ctpop16);

    g_test_add_func("/bitcnt/ctpop32", test_ctpop32);

    g_test_add_func("/bitcnt/ctpop64", test_ctpop64);

    return g_test_run();

}