i386: Add missing vector truncate patterns [PR92658].

  Add missing insn patterns for v2si -> v2hi/v2qi and v2hi-> v2qi vector
truncate.

Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}.
Ok for trunk?

gcc/ChangeLog:

	PR target/92658
	* config/i386/mmx.md (truncv2hiv2qi2): New define_insn.
	(truncv2si<mode>2): Ditto.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr92658-avx512bw-trunc-2.c: New test.
---
 gcc/config/i386/mmx.md                        | 21 +++++++++++++++
 .../i386/pr92658-avx512bw-trunc-2.c           | 27 +++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 gcc/testsuite/gcc.target/i386/pr92658-avx512bw-trunc-2.c
  

On Fri, Jun 2, 2023 at 2:49 AM liuhongt <hongtao.liu@intel.com> wrote:
>
> Add missing insn patterns for v2si -> v2hi/v2qi and v2hi-> v2qi vector
> truncate.
>
> Bootstrapped and regtested on x86_64-pc-linux-gnu{-m32,}.
> Ok for trunk?
>
> gcc/ChangeLog:
>
>         PR target/92658
>         * config/i386/mmx.md (truncv2hiv2qi2): New define_insn.
>         (truncv2si<mode>2): Ditto.
>
> gcc/testsuite/ChangeLog:
>
>         * gcc.target/i386/pr92658-avx512bw-trunc-2.c: New test.

OK.

Thanks,
Uros.
> ---
>  gcc/config/i386/mmx.md                        | 21 +++++++++++++++
>  .../i386/pr92658-avx512bw-trunc-2.c           | 27 +++++++++++++++++++
>  2 files changed, 48 insertions(+)
>  create mode 100644 gcc/testsuite/gcc.target/i386/pr92658-avx512bw-trunc-2.c
>
> diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
> index dbcb850ffde..bb45098f797 100644
> --- a/gcc/config/i386/mmx.md
> +++ b/gcc/config/i386/mmx.md
> @@ -3667,6 +3667,27 @@ (define_expand "<insn>v2qiv2hi2"
>    DONE;
>  })
>
> +(define_insn "truncv2hiv2qi2"
> +  [(set (match_operand:V2QI 0 "register_operand" "=v")
> +       (truncate:V2QI
> +         (match_operand:V2HI 1 "register_operand" "v")))]
> +  "TARGET_AVX512VL && TARGET_AVX512BW"
> +  "vpmovwb\t{%1, %0|%0, %1}"
> +  [(set_attr "type" "ssemov")
> +   (set_attr "prefix" "evex")
> +   (set_attr "mode" "TI")])
> +
> +(define_mode_iterator V2QI_V2HI [V2QI V2HI])
> +(define_insn "truncv2si<mode>2"
> +  [(set (match_operand:V2QI_V2HI 0 "register_operand" "=v")
> +       (truncate:V2QI_V2HI
> +         (match_operand:V2SI 1 "register_operand" "v")))]
> +  "TARGET_AVX512VL && TARGET_MMX_WITH_SSE"
> +  "vpmovd<mmxvecsize>\t{%1, %0|%0, %1}"
> +  [(set_attr "type" "ssemov")
> +   (set_attr "prefix" "evex")
> +   (set_attr "mode" "TI")])
> +
>  ;; Pack/unpack vector modes
>  (define_mode_attr mmxpackmode
>    [(V4HI "V8QI") (V2SI "V4HI")])
> diff --git a/gcc/testsuite/gcc.target/i386/pr92658-avx512bw-trunc-2.c b/gcc/testsuite/gcc.target/i386/pr92658-avx512bw-trunc-2.c
> new file mode 100644
> index 00000000000..2f5b7dc5668
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/i386/pr92658-avx512bw-trunc-2.c
> @@ -0,0 +1,27 @@
> +/* PR target/92658 */
> +/* { dg-do compile } */
> +/* { dg-options "-O2 -mavx512bw -mavx512vl" } */
> +/* { dg-final { scan-assembler-times "vpmovwb" 1 } } */
> +/* { dg-final { scan-assembler-times "vpmovdb" 1 { target { ! ia32 } } } } */
> +/* { dg-final { scan-assembler-times "vpmovdw" 1 { target { ! ia32 } } } } */
> +
> +void
> +foo (int* __restrict a, char* b)
> +{
> +    b[0] = a[0];
> +    b[1] = a[1];
> +}
> +
> +void
> +foo2 (short* __restrict a, char* b)
> +{
> +    b[0] = a[0];
> +    b[1] = a[1];
> +}
> +
> +void
> +foo3 (int* __restrict a, short* b)
> +{
> +    b[0] = a[0];
> +    b[1] = a[1];
> +}
> --
> 2.39.1.388.g2fc9e9ca3c
>