From 85411ac9b3e1164c4deb2e9eed6c152ef64f2c51 Mon Sep 17 00:00:00 2001 From: Ilya Leoshkevich Date: Tue, 4 Jul 2023 10:12:35 +0200 Subject: [PATCH] tests/tcg/s390x: Test MDEB and MDEBR Add a small test to prevent regressions. Signed-off-by: Ilya Leoshkevich Acked-by: David Hildenbrand Message-Id: <20230704081506.276055-12-iii@linux.ibm.com> Signed-off-by: Thomas Huth --- tests/tcg/s390x/Makefile.target | 1 + tests/tcg/s390x/mdeb.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) create mode 100644 tests/tcg/s390x/mdeb.c diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target index dbf64c991e..19fbbc6e53 100644 --- a/tests/tcg/s390x/Makefile.target +++ b/tests/tcg/s390x/Makefile.target @@ -38,6 +38,7 @@ TESTS+=ex-branch TESTS+=mxdb TESTS+=epsw TESTS+=larl +TESTS+=mdeb cdsg: CFLAGS+=-pthread cdsg: LDFLAGS+=-pthread diff --git a/tests/tcg/s390x/mdeb.c b/tests/tcg/s390x/mdeb.c new file mode 100644 index 0000000000..4897d28069 --- /dev/null +++ b/tests/tcg/s390x/mdeb.c @@ -0,0 +1,30 @@ +/* + * Test the MDEB and MDEBR instructions. + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ +#include +#include + +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; +}