Re: [PATCH 08/12] tests/tcg/s390x: Test EPSW

[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/epsw.c          | 23 +++++++++++++++++++++++
>   2 files changed, 24 insertions(+)
>   create mode 100644 tests/tcg/s390x/epsw.c
> 
> diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
> index 85abfbb98c0..2ef22c88d95 100644
> --- a/tests/tcg/s390x/Makefile.target
> +++ b/tests/tcg/s390x/Makefile.target
> @@ -36,6 +36,7 @@ TESTS+=rxsbg
>   TESTS+=ex-relative-long
>   TESTS+=ex-branch
>   TESTS+=mxdb
> +TESTS+=epsw
>   
>   cdsg: CFLAGS+=-pthread
>   cdsg: LDFLAGS+=-pthread
> diff --git a/tests/tcg/s390x/epsw.c b/tests/tcg/s390x/epsw.c
> new file mode 100644
> index 00000000000..affb1a5e3a1
> --- /dev/null
> +++ b/tests/tcg/s390x/epsw.c
> @@ -0,0 +1,23 @@
> +/*
> + * Test the EPSW instruction.
> + *
> + * SPDX-License-Identifier: GPL-2.0-or-later
> + */
> +#include <assert.h>
> +#include <stdlib.h>
> +
> +int main(void)
> +{
> +    unsigned long r1 = 0x1234567887654321UL, r2 = 0x8765432112345678UL;
> +
> +    asm("cr %[r1],%[r2]\n"  /* cc = 1 */
> +        "epsw %[r1],%[r2]"
> +        : [r1] "+r" (r1), [r2] "+r" (r2) : : "cc");
> +
> +    /* Do not check the R and RI bits. */
> +    r1 &= ~0x40000008UL;
> +    assert(r1 == 0x1234567807051001UL);
> +    assert(r2 == 0x8765432180000000UL);
> +
> +    return EXIT_SUCCESS;
> +}

Reviewed-by: David Hildenbrand <david@redhat.com>

-- 
Cheers,

David / dhildenb