Re: [PATCH v2 2/3] target/riscv: rvv-1.0: Call the correct RVF/RVD check function for widening fp/int type-convert insns

[Alistair Francis]

On Wed, Jan 5, 2022 at 12:25 PM <frank.chang@sifive.com> wrote:
>
> From: Frank Chang <frank.chang@sifive.com>
>
> vfwcvt.xu.f.v, vfwcvt.x.f.v, vfwcvt.rtz.xu.f.v and vfwcvt.rtz.x.f.v
> convert single-width floating-point to double-width integer.
> Therefore, should use require_rvf() to check whether RVF/RVD is enabled.
>
> vfwcvt.f.xu.v, vfwcvt.f.x.v convert single-width integer to double-width
> floating-point, and vfwcvt.f.f.v convert double-width floating-point to
> single-width floating-point. Therefore, should use require_scale_rvf() to
> check whether RVF/RVD is enabled.
>
> Signed-off-by: Frank Chang <frank.chang@sifive.com>

Acked-by: Alistair Francis <alistair.francis@wdc.com>

Alistair

> ---
>  target/riscv/insn_trans/trans_rvv.c.inc | 34 ++++++++++++++++++-------
>  1 file changed, 25 insertions(+), 9 deletions(-)
>
> diff --git a/target/riscv/insn_trans/trans_rvv.c.inc 
> b/target/riscv/insn_trans/trans_rvv.c.inc
> index 8d92243f2b..f1b44ccad2 100644
> --- a/target/riscv/insn_trans/trans_rvv.c.inc
> +++ b/target/riscv/insn_trans/trans_rvv.c.inc
> @@ -2613,16 +2613,27 @@ GEN_OPFV_CVT_TRANS(vfcvt_rtz_x_f_v, vfcvt_x_f_v, 
> RISCV_FRM_RTZ)
>  static bool opfv_widen_check(DisasContext *s, arg_rmr *a)
>  {
>      return require_rvv(s) &&
> -           require_scale_rvf(s) &&
> -           (s->sew != MO_8) &&
>             vext_check_isa_ill(s) &&
>             vext_check_ds(s, a->rd, a->rs2, a->vm);
>  }
>
> -#define GEN_OPFV_WIDEN_TRANS(NAME, HELPER, FRM)                    \
> +static bool opxfv_widen_check(DisasContext *s, arg_rmr *a)
> +{
> +    return opfv_widen_check(s, a) &&
> +           require_rvf(s);
> +}
> +
> +static bool opffv_widen_check(DisasContext *s, arg_rmr *a)
> +{
> +    return opfv_widen_check(s, a) &&
> +           require_scale_rvf(s) &&
> +           (s->sew != MO_8);
> +}
> +
> +#define GEN_OPFV_WIDEN_TRANS(NAME, CHECK, HELPER, FRM)             \
>  static bool trans_##NAME(DisasContext *s, arg_rmr *a)              \
>  {                                                                  \
> -    if (opfv_widen_check(s, a)) {                                  \
> +    if (CHECK(s, a)) {                                             \
>          if (FRM != RISCV_FRM_DYN) {                                \
>              gen_set_rm(s, RISCV_FRM_DYN);                          \
>          }                                                          \
> @@ -2649,12 +2660,17 @@ static bool trans_##NAME(DisasContext *s, arg_rmr *a) 
>              \
>      return false;                                                  \
>  }
>
> -GEN_OPFV_WIDEN_TRANS(vfwcvt_xu_f_v, vfwcvt_xu_f_v, RISCV_FRM_DYN)
> -GEN_OPFV_WIDEN_TRANS(vfwcvt_x_f_v, vfwcvt_x_f_v, RISCV_FRM_DYN)
> -GEN_OPFV_WIDEN_TRANS(vfwcvt_f_f_v, vfwcvt_f_f_v, RISCV_FRM_DYN)
> +GEN_OPFV_WIDEN_TRANS(vfwcvt_xu_f_v, opxfv_widen_check, vfwcvt_xu_f_v,
> +                     RISCV_FRM_DYN)
> +GEN_OPFV_WIDEN_TRANS(vfwcvt_x_f_v, opxfv_widen_check, vfwcvt_x_f_v,
> +                     RISCV_FRM_DYN)
> +GEN_OPFV_WIDEN_TRANS(vfwcvt_f_f_v, opffv_widen_check, vfwcvt_f_f_v,
> +                     RISCV_FRM_DYN)
>  /* Reuse the helper functions from vfwcvt.xu.f.v and vfwcvt.x.f.v */
> -GEN_OPFV_WIDEN_TRANS(vfwcvt_rtz_xu_f_v, vfwcvt_xu_f_v, RISCV_FRM_RTZ)
> -GEN_OPFV_WIDEN_TRANS(vfwcvt_rtz_x_f_v, vfwcvt_x_f_v, RISCV_FRM_RTZ)
> +GEN_OPFV_WIDEN_TRANS(vfwcvt_rtz_xu_f_v, opxfv_widen_check, vfwcvt_xu_f_v,
> +                     RISCV_FRM_RTZ)
> +GEN_OPFV_WIDEN_TRANS(vfwcvt_rtz_x_f_v, opxfv_widen_check, vfwcvt_x_f_v,
> +                     RISCV_FRM_RTZ)
>
>  static bool opfxv_widen_check(DisasContext *s, arg_rmr *a)
>  {
> --
> 2.31.1
>
>