Re: [PATCH v1] RISC-V: Support RVV VFCVT.X.F.V rounding mode intrinsic API

[Kito Cheng via Gcc-patches]

Just a random idea came to my mind, maybe we could introduce one more
template argument to reduce those codes for rounding mode intrinsic
stuff?

example:

diff --git a/gcc/config/riscv/riscv-vector-builtins-bases.cc
b/gcc/config/riscv/riscv-vector-builtins-bases.cc
index 2074dac0f16..9cc60842a5b 100644
--- a/gcc/config/riscv/riscv-vector-builtins-bases.cc
+++ b/gcc/config/riscv/riscv-vector-builtins-bases.cc
@@ -1648,10 +1648,11 @@ public:
};

/* Implements vfcvt.x.  */
-template<int UNSPEC>
+template<int UNSPEC, bool HAS_FRM = false>
class vfcvt_x : public function_base
{
public:
+  bool has_rounding_mode_operand_p () const override { return HAS_FRM; }
  rtx expand (function_expander &e) const override
  {
    return e.use_exact_insn (code_for_pred_fcvt_x_f (UNSPEC, e.arg_mode (0)));
@@ -2451,6 +2452,7 @@ static CONSTEXPR const vmerge vfmerge_obj;
static CONSTEXPR const vmv_v vfmv_v_obj;
static CONSTEXPR const vfcvt_x<UNSPEC_VFCVT> vfcvt_x_obj;
static CONSTEXPR const vfcvt_x<UNSPEC_UNSIGNED_VFCVT> vfcvt_xu_obj;
+static CONSTEXPR const vfcvt_x<UNSPEC_VFCVT, /*HAS_FRM*/true> vfcvt_x_frm_obj;
static CONSTEXPR const vfcvt_rtz_x<FIX> vfcvt_rtz_x_obj;
static CONSTEXPR const vfcvt_rtz_x<UNSIGNED_FIX> vfcvt_rtz_xu_obj;
static CONSTEXPR const vfcvt_f vfcvt_f_obj;