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tests/tcg/s390x: Test MXDB and MXDBR

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Add a small test to prevent regressions.

Cc: qemu-stable@nongnu.org
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Message-Id: <20230601223027.795501-3-iii@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-06-02 00:30:27 +02:00 committed by Thomas Huth
parent a7f4add793
commit 2b956244a9
2 changed files with 31 additions and 0 deletions
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1
tests/tcg/s390x/Makefile.target
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@ -35,6 +35,7 @@ TESTS+=chrl
TESTS+=rxsbg
TESTS+=ex-relative-long
TESTS+=ex-branch
TESTS+=mxdb
cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread

30
tests/tcg/s390x/mxdb.c Normal file
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@ -0,0 +1,30 @@
/*
* Test the MXDB and MXDBR instructions.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <assert.h>
#include <stdlib.h>
int main(void)
{
union {
double d[2];
long double ld;
} a;
double b;
a.d[0] = 1.2345;
a.d[1] = 999;
b = 6.789;
asm("mxdb %[a],%[b]" : [a] "+f" (a.ld) : [b] "R" (b));
assert(a.ld > 8.38 && a.ld < 8.39);
a.d[0] = 1.2345;
a.d[1] = 999;
b = 6.789;
asm("mxdbr %[a],%[b]" : [a] "+f" (a.ld) : [b] "f" (b));
assert(a.ld > 8.38 && a.ld < 8.39);
return EXIT_SUCCESS;
}