diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index 5771a4fa8a..886655899e 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -2189,3 +2189,11 @@ DEF_HELPER_6(th_vmford_vv_d, void, ptr, ptr, ptr, ptr, env, i32)
 DEF_HELPER_6(th_vmford_vf_h, void, ptr, ptr, i64, ptr, env, i32)
 DEF_HELPER_6(th_vmford_vf_w, void, ptr, ptr, i64, ptr, env, i32)
 DEF_HELPER_6(th_vmford_vf_d, void, ptr, ptr, i64, ptr, env, i32)
+
+DEF_HELPER_5(th_vfclass_v_h, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(th_vfclass_v_w, void, ptr, ptr, ptr, env, i32)
+DEF_HELPER_5(th_vfclass_v_d, void, ptr, ptr, ptr, env, i32)
+
+DEF_HELPER_6(th_vfmerge_vfm_h, void, ptr, ptr, i64, ptr, env, i32)
+DEF_HELPER_6(th_vfmerge_vfm_w, void, ptr, ptr, i64, ptr, env, i32)
+DEF_HELPER_6(th_vfmerge_vfm_d, void, ptr, ptr, i64, ptr, env, i32)
diff --git a/target/riscv/insn_trans/trans_xtheadvector.c.inc b/target/riscv/insn_trans/trans_xtheadvector.c.inc
index 1e773c673e..8e928febb7 100644
--- a/target/riscv/insn_trans/trans_xtheadvector.c.inc
+++ b/target/riscv/insn_trans/trans_xtheadvector.c.inc
@@ -2143,15 +2143,60 @@ GEN_OPFVF_TRANS_TH(th_vmfgt_vf, opfvf_cmp_check_th)
 GEN_OPFVF_TRANS_TH(th_vmfge_vf, opfvf_cmp_check_th)
 GEN_OPFVF_TRANS_TH(th_vmford_vf, opfvf_cmp_check_th)
 
+/* Vector Floating-Point Classify Instruction */
+GEN_OPFV_TRANS_TH(th_vfclass_v, opfv_check_th)
+
+/* Vector Floating-Point Merge Instruction */
+GEN_OPFVF_TRANS_TH(th_vfmerge_vfm,  opfvf_check_th)
+
+/* Besides of check function, th_vfmv_v_f just reuse the helper_th_vmv_v_x */
+static bool trans_th_vfmv_v_f(DisasContext *s, arg_th_vfmv_v_f *a)
+{
+    if (require_xtheadvector(s) &&
+        vext_check_isa_ill(s) &&
+        th_check_reg(s, a->rd, false) &&
+        (s->sew != 0)) {
+
+        TCGv_i64 t1;
+
+        if (s->vl_eq_vlmax) {
+            t1 = tcg_temp_new_i64();
+            /* NaN-box f[rs1] */
+            do_nanbox(s, t1, cpu_fpr[a->rs1]);
+            tcg_gen_gvec_dup_i64(s->sew, vreg_ofs(s, a->rd),
+                                 MAXSZ(s), MAXSZ(s), t1);
+        } else {
+            TCGv_ptr dest;
+            TCGv_i32 desc;
+            uint32_t data = FIELD_DP32(0, VDATA_TH, LMUL, s->lmul);
+            static gen_helper_vmv_vx_th * const fns[3] = {
+                gen_helper_th_vmv_v_x_h,
+                gen_helper_th_vmv_v_x_w,
+                gen_helper_th_vmv_v_x_d,
+            };
+
+            t1 = tcg_temp_new_i64();
+            /* NaN-box f[rs1] */
+            do_nanbox(s, t1, cpu_fpr[a->rs1]);
+
+            dest = tcg_temp_new_ptr();
+            desc = tcg_constant_i32(simd_desc(s->cfg_ptr->vlenb,
+                                              s->cfg_ptr->vlenb, data));
+            tcg_gen_addi_ptr(dest, tcg_env, vreg_ofs(s, a->rd));
+            fns[s->sew - 1](dest, t1, tcg_env, desc);
+        }
+        finalize_rvv_inst(s);
+        return true;
+    }
+    return false;
+}
+
 #define TH_TRANS_STUB(NAME)                                \
 static bool trans_##NAME(DisasContext *s, arg_##NAME *a)   \
 {                                                          \
     return require_xtheadvector(s);                        \
 }
 
-TH_TRANS_STUB(th_vfclass_v)
-TH_TRANS_STUB(th_vfmerge_vfm)
-TH_TRANS_STUB(th_vfmv_v_f)
 TH_TRANS_STUB(th_vfcvt_xu_f_v)
 TH_TRANS_STUB(th_vfcvt_x_f_v)
 TH_TRANS_STUB(th_vfcvt_f_xu_v)
diff --git a/target/riscv/xtheadvector_helper.c b/target/riscv/xtheadvector_helper.c
index 603b34a094..e31e13dff3 100644
--- a/target/riscv/xtheadvector_helper.c
+++ b/target/riscv/xtheadvector_helper.c
@@ -3147,3 +3147,61 @@ GEN_TH_CMP_VV_ENV(th_vmford_vv_d, uint64_t, H8, !float64_unordered_quiet)
 GEN_TH_CMP_VF(th_vmford_vf_h, uint16_t, H2, !float16_unordered_quiet)
 GEN_TH_CMP_VF(th_vmford_vf_w, uint32_t, H4, !float32_unordered_quiet)
 GEN_TH_CMP_VF(th_vmford_vf_d, uint64_t, H8, !float64_unordered_quiet)
+
+/* Vector Floating-Point Classify Instruction */
+#define TH_OPIVV1(NAME, TD, T2, TX2, HD, HS2, OP) \
+        OPIVV1(NAME, TD, T2, TX2, HD, HS2, OP)
+
+#define GEN_TH_V(NAME, ESZ, DSZ, CLEAR_FN)             \
+void HELPER(NAME)(void *vd, void *v0, void *vs2,       \
+                  CPURISCVState *env, uint32_t desc)   \
+{                                                      \
+    uint32_t vlmax = th_maxsz(desc) / ESZ;             \
+    uint32_t mlen = th_mlen(desc);                     \
+    uint32_t vm = th_vm(desc);                         \
+    uint32_t vl = env->vl;                             \
+    uint32_t i;                                        \
+                                                       \
+    VSTART_CHECK_EARLY_EXIT(env);                      \
+    for (i = env->vstart; i < vl; i++) {               \
+        if (!vm && !th_elem_mask(v0, mlen, i)) {       \
+            continue;                                  \
+        }                                              \
+        do_##NAME(vd, vs2, i);                         \
+    }                                                  \
+    env->vstart = 0;                                   \
+    CLEAR_FN(vd, vl, vl * DSZ,  vlmax * DSZ);          \
+}
+
+THCALL(TH_OPIVV1, th_vfclass_v_h, OP_UU_H, H2, H2, fclass_h)
+THCALL(TH_OPIVV1, th_vfclass_v_w, OP_UU_W, H4, H4, fclass_s)
+THCALL(TH_OPIVV1, th_vfclass_v_d, OP_UU_D, H8, H8, fclass_d)
+GEN_TH_V(th_vfclass_v_h, 2, 2, clearh_th)
+GEN_TH_V(th_vfclass_v_w, 4, 4, clearl_th)
+GEN_TH_V(th_vfclass_v_d, 8, 8, clearq_th)
+
+/* Vector Floating-Point Merge Instruction */
+#define GEN_VFMERGE_VF_TH(NAME, ETYPE, H, CLEAR_FN)           \
+void HELPER(NAME)(void *vd, void *v0, uint64_t s1, void *vs2, \
+                  CPURISCVState *env, uint32_t desc)          \
+{                                                             \
+    uint32_t mlen = th_mlen(desc);                            \
+    uint32_t vm = th_vm(desc);                                \
+    uint32_t vl = env->vl;                                    \
+    uint32_t esz = sizeof(ETYPE);                             \
+    uint32_t vlmax = th_maxsz(desc) / esz;                    \
+    uint32_t i;                                               \
+                                                              \
+    VSTART_CHECK_EARLY_EXIT(env);                             \
+    for (i = env->vstart; i < vl; i++) {                      \
+        ETYPE s2 = *((ETYPE *)vs2 + H(i));                    \
+        *((ETYPE *)vd + H(i))                                 \
+          = (!vm && !th_elem_mask(v0, mlen, i) ? s2 : s1);    \
+    }                                                         \
+    env->vstart = 0;                                          \
+    CLEAR_FN(vd, vl, vl * esz, vlmax * esz);                  \
+}
+
+GEN_VFMERGE_VF_TH(th_vfmerge_vfm_h, int16_t, H2, clearh_th)
+GEN_VFMERGE_VF_TH(th_vfmerge_vfm_w, int32_t, H4, clearl_th)
+GEN_VFMERGE_VF_TH(th_vfmerge_vfm_d, int64_t, H8, clearq_th)
