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tests/tcg/s390x: Test MDEB and MDEBR

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Add a small test to prevent regressions.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Acked-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230704081506.276055-12-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-07-04 10:12:35 +02:00 committed by Thomas Huth
parent 028dc70e18
commit 85411ac9b3
2 changed files with 31 additions and 0 deletions
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1
tests/tcg/s390x/Makefile.target
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@ -38,6 +38,7 @@ TESTS+=ex-branch
TESTS+=mxdb
TESTS+=epsw
TESTS+=larl
TESTS+=mdeb
cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread

30
tests/tcg/s390x/mdeb.c Normal file
View file

@ -0,0 +1,30 @@
/*
* Test the MDEB and MDEBR instructions.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <assert.h>
#include <stdlib.h>
int main(void)
{
union {
float f[2];
double d;
} a;
float b;
a.f[0] = 1.2345;
a.f[1] = 999;
b = 6.789;
asm("mdeb %[a],%[b]" : [a] "+f" (a.d) : [b] "R" (b));
assert(a.d > 8.38 && a.d < 8.39);
a.f[0] = 1.2345;
a.f[1] = 999;
b = 6.789;
asm("mdebr %[a],%[b]" : [a] "+f" (a.d) : [b] "f" (b));
assert(a.d > 8.38 && a.d < 8.39);
return EXIT_SUCCESS;
}