> -----Original Message-----
> From: Srinath Parvathaneni <srinath.parvathan...@arm.com>
> Sent: 18 June 2020 14:29
> To: gcc-patches@gcc.gnu.org
> Cc: Kyrylo Tkachov <kyrylo.tkac...@arm.com>
> Subject: [PATCH][GCC] arm: Fix the failing mve scalar shift execution tests.
>
> Hello,
>
> In GCC testsuite the MVE scalar shift execution tests
> (mve_scalar_shifts[1-4].c)
> are failings
> because of executing them on target hardware which doesn't support MVE
> instructions. This patch
> restricts those tests to execute only on target hardware that support MVE
> instructions.
>
> Regression tested on arm-none-eabi and found no regressions.
>
> Ok for master? Ok for GCC-10 branch?
>
Ok.
Thanks,
Kyrill
> Thanks,
> Srinath.
>
> 2020-06-18 Srinath Parvathaneni <srinath.parvathan...@arm.com>
>
> gcc/
> * doc/sourcebuild.texi (arm_v8_1m_mve_fp_ok): Add item.
> (arm_mve_hw): Likewise.
>
> gcc/testsuite/
> * gcc.target/arm/mve/mve.exp
> (check_effective_target_arm_mve_hw): Check
> availability of hardware supporting MVE instructions.
> * lib/target-supports.exp (check_effective_target_arm_mve_hw):
> Define.
>
>
> ############### Attachment also inlined for ease of reply
> ###############
>
>
> diff --git a/gcc/doc/sourcebuild.texi b/gcc/doc/sourcebuild.texi
> index
> e5554c4666eb217844598352ced5a9597652f07c..a12af822443ad41afba816ed
> 640d80d182859239 100644
> --- a/gcc/doc/sourcebuild.texi
> +++ b/gcc/doc/sourcebuild.texi
> @@ -1925,6 +1925,15 @@ ARM target supports options to generate
> instructions from ARMv8.1-M with
> the M-Profile Vector Extension (MVE). Some multilibs may be incompatible
> with these options.
>
> +@item arm_v8_1m_mve_fp_ok
> +ARM target supports options to generate instructions from ARMv8.1-M with
> +the Half-precision floating-point instructions (HP), Floating-point Extension
> +(FP) along with M-Profile Vector Extension (MVE). Some multilibs may be
> +incompatible with these options.
> +
> +@item arm_mve_hw
> +Test system supports executing MVE instructions.
> +
> @item arm_v8m_main_cde
> ARM target supports options to generate instructions from ARMv8-M with
> the Custom Datapath Extension (CDE). Some multilibs may be incompatible
> diff --git a/gcc/testsuite/gcc.target/arm/mve/mve.exp
> b/gcc/testsuite/gcc.target/arm/mve/mve.exp
> index
> e84cb068940e2cb4ed7bbdd51b14d52cec3e323f..aaa3b78b2a9400070d0ca33
> cb0e98bd0fad7d408 100644
> --- a/gcc/testsuite/gcc.target/arm/mve/mve.exp
> +++ b/gcc/testsuite/gcc.target/arm/mve/mve.exp
> @@ -24,6 +24,11 @@ if ![istarget arm*-*-*] then {
> # Load support procs.
> load_lib gcc-dg.exp
>
> +# Exit immediately if the target does not support MVE instructions.
> +if ![check_effective_target_arm_mve_hw] then {
> + return
> +}
> +
> # If a testcase doesn't have special options, use these.
> global DEFAULT_CFLAGS
> if ![info exists DEFAULT_CFLAGS] then {
> diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-
> supports.exp
> index
> 862a0735b49582f7f35a9a4009f5752cf8f7e3ba..ab0ee32fc911622b4716c272d
> f4e656698b81a70 100644
> --- a/gcc/testsuite/lib/target-supports.exp
> +++ b/gcc/testsuite/lib/target-supports.exp
> @@ -4671,6 +4671,24 @@ proc check_effective_target_arm_cmse_ok {} {
> } "-mcmse"];
> }
>
> +# Return 1 if the target supports executing MVE instructions, 0
> +# otherwise.
> +
> +proc check_effective_target_arm_mve_hw {} {
> + return [check_runtime arm_mve_hw_available {
> + int
> + main (void)
> + {
> + long long a = 16;
> + int b = 3;
> + asm ("sqrshrl %Q1, %R1, #64, %2"
> + : "=l" (a)
> + : "0" (a), "r" (b));
> + return (a != 2);
> + }
> + } ""]
> +}
> +
> # Return 1 if this is an ARM target where ARMv8-M Security Extensions with
> # clearing instructions (clrm, vscclrm, vstr/vldr with FPCXT) is available.
>
