On 03.07.23 17:50, Ilya Leoshkevich wrote:
> Add a small test to prevent regressions.
>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
> ---
> 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 dbf64c991e9..19fbbc6e531 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 00000000000..4897d28069f
> --- /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 <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;
> +}
Acked-by: David Hildenbrand <david@redhat.com>
--
Cheers,
David / dhildenb