Re: [PATCH 11/12] tests/tcg/s390x: Test MDEB and MDEBR

[David Hildenbrand <david@redhat.com>]

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