On Fri, Mar 18, 2022 at 9:18 AM liuhongt <hongtao....@intel.com> wrote:
>
> Set attr from HImode to HFmode which uses vmovsh instead of vmovw for
> movment between sse registers.
>
> Bootstrapped and regstested on x86_64-pc-linux-gnu{-m32,}.
> Ok for main trunk?
>
> gcc/ChangeLog:
>
> PR target/104974
> * config/i386/i386.md (*movhi_internal): Set attr type from HI
> to HF for alternative 12 under TARGET_AVX512FP16.
>
> gcc/testsuite/ChangeLog:
>
> * gcc.target/i386/pr104974.c: New test.
OK.
Thanks,
Uros.
> ---
> gcc/config/i386/i386.md | 2 +-
> gcc/testsuite/gcc.target/i386/pr104974.c | 12 ++++++++++++
> 2 files changed, 13 insertions(+), 1 deletion(-)
> create mode 100644 gcc/testsuite/gcc.target/i386/pr104974.c
>
> diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
> index c8fbf605e41..42aa0e1d998 100644
> --- a/gcc/config/i386/i386.md
> +++ b/gcc/config/i386/i386.md
> @@ -2658,7 +2658,7 @@ (define_insn "*movhi_internal"
> (const_string "TI"))
> (eq_attr "alternative" "12")
> (cond [(match_test "TARGET_AVX512FP16")
> - (const_string "HI")
> + (const_string "HF")
> (match_test "TARGET_AVX")
> (const_string "TI")
> (ior (not (match_test "TARGET_SSE2"))
> diff --git a/gcc/testsuite/gcc.target/i386/pr104974.c
> b/gcc/testsuite/gcc.target/i386/pr104974.c
> new file mode 100644
> index 00000000000..d1f2b1a9722
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/i386/pr104974.c
> @@ -0,0 +1,12 @@
> +/* { dg-do assemble { target avx512fp16 } } */
> +/* { dg-options "-mavx512fp16 -O2" } */
> +
> +short
> +foo (short a)
> +{
> + register short b __asm ("%xmm1") = a;
> + asm volatile ("": "+v" (b));
> + register short c __asm ("%xmm2") = b;
> + asm volatile ("": "+v" (c));
> + return a;
> +}
> --
> 2.18.1
>
