From ad85ac6a8f8325b6a15058e99d76203b4cde6044 Mon Sep 17 00:00:00 2001 From: Ilya Leoshkevich Date: Tue, 4 Jul 2023 10:12:33 +0200 Subject: [PATCH] tests/tcg/s390x: Test LARL with a large offset Add a small test to prevent regressions. Signed-off-by: Ilya Leoshkevich Acked-by: David Hildenbrand Message-Id: <20230704081506.276055-10-iii@linux.ibm.com> Signed-off-by: Thomas Huth --- tests/tcg/s390x/Makefile.target | 1 + tests/tcg/s390x/larl.c | 21 +++++++++++++++++++++ 2 files changed, 22 insertions(+) create mode 100644 tests/tcg/s390x/larl.c diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target index 2ef22c88d9..dbf64c991e 100644 --- a/tests/tcg/s390x/Makefile.target +++ b/tests/tcg/s390x/Makefile.target @@ -37,6 +37,7 @@ TESTS+=ex-relative-long TESTS+=ex-branch TESTS+=mxdb TESTS+=epsw +TESTS+=larl cdsg: CFLAGS+=-pthread cdsg: LDFLAGS+=-pthread diff --git a/tests/tcg/s390x/larl.c b/tests/tcg/s390x/larl.c new file mode 100644 index 0000000000..7c95f89be7 --- /dev/null +++ b/tests/tcg/s390x/larl.c @@ -0,0 +1,21 @@ +/* + * Test the LARL instruction. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include + +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; +}