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tests/tcg/s390x: Test LCBB

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Add a test to prevent regressions.

Cc: qemu-stable@nongnu.org
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230526181240.1425579-3-iii@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
(cherry picked from commit 05d000fb4d)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This commit is contained in:
Ilya Leoshkevich 2023-05-26 20:12:38 +02:00 committed by Michael Tokarev
parent 347714a28c
commit 242efaca9e
2 changed files with 52 additions and 0 deletions
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1
tests/tcg/s390x/Makefile.target
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@ -26,6 +26,7 @@ TESTS+=branch-relative-long
TESTS+=noexec
Z13_TESTS=vistr
Z13_TESTS+=lcbb
$(Z13_TESTS): CFLAGS+=-march=z13 -O2
TESTS+=$(Z13_TESTS)

51
tests/tcg/s390x/lcbb.c Normal file
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@ -0,0 +1,51 @@
/*
* Test the LCBB instruction.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <assert.h>
#include <stdlib.h>
static inline __attribute__((__always_inline__)) void
lcbb(long *r1, void *dxb2, int m3, int *cc)
{
asm("lcbb %[r1],%[dxb2],%[m3]\n"
"ipm %[cc]"
: [r1] "+r" (*r1), [cc] "=r" (*cc)
: [dxb2] "R" (*(char *)dxb2), [m3] "i" (m3)
: "cc");
*cc = (*cc >> 28) & 3;
}
static char buf[0x1000] __attribute__((aligned(0x1000)));
static inline __attribute__((__always_inline__)) void
test_lcbb(void *p, int m3, int exp_r1, int exp_cc)
{
long r1 = 0xfedcba9876543210;
int cc;
lcbb(&r1, p, m3, &cc);
assert(r1 == (0xfedcba9800000000 | exp_r1));
assert(cc == exp_cc);
}
int main(void)
{
test_lcbb(&buf[0], 0, 16, 0);
test_lcbb(&buf[63], 0, 1, 3);
test_lcbb(&buf[0], 1, 16, 0);
test_lcbb(&buf[127], 1, 1, 3);
test_lcbb(&buf[0], 2, 16, 0);
test_lcbb(&buf[255], 2, 1, 3);
test_lcbb(&buf[0], 3, 16, 0);
test_lcbb(&buf[511], 3, 1, 3);
test_lcbb(&buf[0], 4, 16, 0);
test_lcbb(&buf[1023], 4, 1, 3);
test_lcbb(&buf[0], 5, 16, 0);
test_lcbb(&buf[2047], 5, 1, 3);
test_lcbb(&buf[0], 6, 16, 0);
test_lcbb(&buf[4095], 6, 1, 3);
return EXIT_SUCCESS;
}