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tests/tcg/s390x: Test LARL with a large offset

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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: <20230704081506.276055-10-iii@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Ilya Leoshkevich 2023-07-04 10:12:33 +02:00 • committed by Thomas Huth
parent f5c2ae7134
commit ad85ac6a8f
2 changed files with 22 additions and 0 deletions
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1
tests/tcg/s390x/Makefile.target
View file

@ -37,6 +37,7 @@ TESTS+=ex-relative-long
TESTS+=ex-branch TESTS+=ex-branch
TESTS+=mxdb TESTS+=mxdb
TESTS+=epsw TESTS+=epsw
TESTS+=larl
cdsg: CFLAGS+=-pthread cdsg: CFLAGS+=-pthread
cdsg: LDFLAGS+=-pthread cdsg: LDFLAGS+=-pthread

21
tests/tcg/s390x/larl.c Normal file
View file

@ -0,0 +1,21 @@
/*
* Test the LARL instruction.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdlib.h>
int main(void)
{
long algfi = (long)main;
long larl;
/*
* The compiler may emit larl for the C addition, so compute the expected
* value using algfi.
*/
asm("algfi %[r],0xd0000000" : [r] "+r" (algfi) : : "cc");
asm("larl %[r],main+0xd0000000" : [r] "=r" (larl));
return algfi == larl ? EXIT_SUCCESS : EXIT_FAILURE;
}