target/riscv: add vector stride load and store instructions

Vector strided operations access the first memory element at the base address,
and then access subsequent elements at address increments given by the byte
offset contained in the x register specified by rs2.

Vector unit-stride operations access elements stored contiguously in memory
starting from the base effective address. It can been seen as a special
case of strided operations.

Signed-off-by: LIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20200701152549.1218-7-zhiwei_liu@c-sky.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

6 files changed, 914 insertions, 0 deletions

diff --git a/target/riscv/helper.h b/target/riscv/helper.h
index 8e81ff4..f03b3d5 100644
--- a/target/riscv/helper.h
+++ b/target/riscv/helper.h
@@ -84,3 +84,108 @@ DEF_HELPER_1(hyp_tlb_flush, void, env)
 
 /* Vector functions */
 DEF_HELPER_3(vsetvl, tl, env, tl, tl)
+DEF_HELPER_5(vlb_v_b, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_b_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlb_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlh_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlh_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlh_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlh_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlh_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlh_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlw_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlw_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlw_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlw_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_b, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_b_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vle_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_b, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_b_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlbu_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlhu_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlhu_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlhu_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlhu_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlhu_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlhu_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlwu_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlwu_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlwu_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vlwu_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_b, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_b_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsb_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsh_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsh_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsh_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsh_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsh_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsh_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsw_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsw_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsw_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vsw_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_b, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_b_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_h, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_h_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_w, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_w_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_d, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_5(vse_v_d_mask, void, ptr, ptr, tl, env, i32)
+DEF_HELPER_6(vlsb_v_b, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsb_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsb_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsb_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsh_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsh_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsh_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsw_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsw_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlse_v_b, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlse_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlse_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlse_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsbu_v_b, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsbu_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsbu_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlsbu_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlshu_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlshu_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlshu_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlswu_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vlswu_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssb_v_b, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssb_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssb_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssb_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssh_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssh_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssh_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssw_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vssw_v_d, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vsse_v_b, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vsse_v_h, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vsse_v_w, void, ptr, ptr, tl, tl, env, i32)
+DEF_HELPER_6(vsse_v_d, void, ptr, ptr, tl, tl, env, i32)
diff --git a/target/riscv/insn32.decode b/target/riscv/insn32.decode
index 1916cf3..58b9579 100644
--- a/target/riscv/insn32.decode
+++ b/target/riscv/insn32.decode
@@ -25,6 +25,7 @@
 %sh10    20:10
 %csr    20:12
 %rm     12:3
+%nf     29:3                     !function=ex_plus_1
 
 # immediates:
 %imm_i    20:s12
@@ -43,6 +44,8 @@
 &u    imm rd
 &shift     shamt rs1 rd
 &atomic    aq rl rs2 rs1 rd
+&r2nfvm    vm rd rs1 nf
+&rnfvm     vm rd rs1 rs2 nf
 
 # Formats 32:
 @r       .......   ..... ..... ... ..... ....... &r                %rs2 %rs1 %rd
@@ -62,6 +65,8 @@
 @r_rm    .......   ..... ..... ... ..... ....... %rs2 %rs1 %rm %rd
 @r2_rm   .......   ..... ..... ... ..... ....... %rs1 %rm %rd
 @r2      .......   ..... ..... ... ..... ....... %rs1 %rd
+@r2_nfvm ... ... vm:1 ..... ..... ... ..... ....... &r2nfvm %nf %rs1 %rd
+@r_nfvm  ... ... vm:1 ..... ..... ... ..... ....... &rnfvm %nf %rs2 %rs1 %rd
 @r2_zimm . zimm:11  ..... ... ..... ....... %rs1 %rd
 
 @hfence_gvma ....... ..... .....   ... ..... ....... %rs2 %rs1
@@ -212,5 +217,32 @@ hfence_gvma 0110001  .....  ..... 000 00000 1110011 @hfence_gvma
 hfence_vvma 0010001  .....  ..... 000 00000 1110011 @hfence_vvma
 
 # *** RV32V Extension ***
+
+# *** Vector loads and stores are encoded within LOADFP/STORE-FP ***
+vlb_v      ... 100 . 00000 ..... 000 ..... 0000111 @r2_nfvm
+vlh_v      ... 100 . 00000 ..... 101 ..... 0000111 @r2_nfvm
+vlw_v      ... 100 . 00000 ..... 110 ..... 0000111 @r2_nfvm
+vle_v      ... 000 . 00000 ..... 111 ..... 0000111 @r2_nfvm
+vlbu_v     ... 000 . 00000 ..... 000 ..... 0000111 @r2_nfvm
+vlhu_v     ... 000 . 00000 ..... 101 ..... 0000111 @r2_nfvm
+vlwu_v     ... 000 . 00000 ..... 110 ..... 0000111 @r2_nfvm
+vsb_v      ... 000 . 00000 ..... 000 ..... 0100111 @r2_nfvm
+vsh_v      ... 000 . 00000 ..... 101 ..... 0100111 @r2_nfvm
+vsw_v      ... 000 . 00000 ..... 110 ..... 0100111 @r2_nfvm
+vse_v      ... 000 . 00000 ..... 111 ..... 0100111 @r2_nfvm
+
+vlsb_v     ... 110 . ..... ..... 000 ..... 0000111 @r_nfvm
+vlsh_v     ... 110 . ..... ..... 101 ..... 0000111 @r_nfvm
+vlsw_v     ... 110 . ..... ..... 110 ..... 0000111 @r_nfvm
+vlse_v     ... 010 . ..... ..... 111 ..... 0000111 @r_nfvm
+vlsbu_v    ... 010 . ..... ..... 000 ..... 0000111 @r_nfvm
+vlshu_v    ... 010 . ..... ..... 101 ..... 0000111 @r_nfvm
+vlswu_v    ... 010 . ..... ..... 110 ..... 0000111 @r_nfvm
+vssb_v     ... 010 . ..... ..... 000 ..... 0100111 @r_nfvm
+vssh_v     ... 010 . ..... ..... 101 ..... 0100111 @r_nfvm
+vssw_v     ... 010 . ..... ..... 110 ..... 0100111 @r_nfvm
+vsse_v     ... 010 . ..... ..... 111 ..... 0100111 @r_nfvm
+
+# *** new major opcode OP-V ***
 vsetvli         0 ........... ..... 111 ..... 1010111  @r2_zimm
 vsetvl          1000000 ..... ..... 111 ..... 1010111  @r
diff --git a/target/riscv/insn_trans/trans_rvv.inc.c b/target/riscv/insn_trans/trans_rvv.inc.c
index c82fdf0..451ab05 100644
--- a/target/riscv/insn_trans/trans_rvv.inc.c
+++ b/target/riscv/insn_trans/trans_rvv.inc.c
@@ -15,6 +15,9 @@
  * You should have received a copy of the GNU General Public License along with
  * this program.  If not, see <http://www.gnu.org/licenses/>.
  */
+#include "tcg/tcg-op-gvec.h"
+#include "tcg/tcg-gvec-desc.h"
+#include "internals.h"
 
 static bool trans_vsetvl(DisasContext *ctx, arg_vsetvl *a)
 {
@@ -77,3 +80,355 @@ static bool trans_vsetvli(DisasContext *ctx, arg_vsetvli *a)
     tcg_temp_free(dst);
     return true;
 }
+
+/* vector register offset from env */
+static uint32_t vreg_ofs(DisasContext *s, int reg)
+{
+    return offsetof(CPURISCVState, vreg) + reg * s->vlen / 8;
+}
+
+/* check functions */
+
+/*
+ * In cpu_get_tb_cpu_state(), set VILL if RVV was not present.
+ * So RVV is also be checked in this function.
+ */
+static bool vext_check_isa_ill(DisasContext *s)
+{
+    return !s->vill;
+}
+
+/*
+ * There are two rules check here.
+ *
+ * 1. Vector register numbers are multiples of LMUL. (Section 3.2)
+ *
+ * 2. For all widening instructions, the destination LMUL value must also be
+ *    a supported LMUL value. (Section 11.2)
+ */
+static bool vext_check_reg(DisasContext *s, uint32_t reg, bool widen)
+{
+    /*
+     * The destination vector register group results are arranged as if both
+     * SEW and LMUL were at twice their current settings. (Section 11.2).
+     */
+    int legal = widen ? 2 << s->lmul : 1 << s->lmul;
+
+    return !((s->lmul == 0x3 && widen) || (reg % legal));
+}
+
+/*
+ * There are two rules check here.
+ *
+ * 1. The destination vector register group for a masked vector instruction can
+ *    only overlap the source mask register (v0) when LMUL=1. (Section 5.3)
+ *
+ * 2. In widen instructions and some other insturctions, like vslideup.vx,
+ *    there is no need to check whether LMUL=1.
+ */
+static bool vext_check_overlap_mask(DisasContext *s, uint32_t vd, bool vm,
+    bool force)
+{
+    return (vm != 0 || vd != 0) || (!force && (s->lmul == 0));
+}
+
+/* The LMUL setting must be such that LMUL * NFIELDS <= 8. (Section 7.8) */
+static bool vext_check_nf(DisasContext *s, uint32_t nf)
+{
+    return (1 << s->lmul) * nf <= 8;
+}
+
+/* common translation macro */
+#define GEN_VEXT_TRANS(NAME, SEQ, ARGTYPE, OP, CHECK)      \
+static bool trans_##NAME(DisasContext *s, arg_##ARGTYPE *a)\
+{                                                          \
+    if (CHECK(s, a)) {                                     \
+        return OP(s, a, SEQ);                              \
+    }                                                      \
+    return false;                                          \
+}
+
+/*
+ *** unit stride load and store
+ */
+typedef void gen_helper_ldst_us(TCGv_ptr, TCGv_ptr, TCGv,
+                                TCGv_env, TCGv_i32);
+
+static bool ldst_us_trans(uint32_t vd, uint32_t rs1, uint32_t data,
+                          gen_helper_ldst_us *fn, DisasContext *s)
+{
+    TCGv_ptr dest, mask;
+    TCGv base;
+    TCGv_i32 desc;
+
+    TCGLabel *over = gen_new_label();
+    tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
+
+    dest = tcg_temp_new_ptr();
+    mask = tcg_temp_new_ptr();
+    base = tcg_temp_new();
+
+    /*
+     * As simd_desc supports at most 256 bytes, and in this implementation,
+     * the max vector group length is 2048 bytes. So split it into two parts.
+     *
+     * The first part is vlen in bytes, encoded in maxsz of simd_desc.
+     * The second part is lmul, encoded in data of simd_desc.
+     */
+    desc = tcg_const_i32(simd_desc(0, s->vlen / 8, data));
+
+    gen_get_gpr(base, rs1);
+    tcg_gen_addi_ptr(dest, cpu_env, vreg_ofs(s, vd));
+    tcg_gen_addi_ptr(mask, cpu_env, vreg_ofs(s, 0));
+
+    fn(dest, mask, base, cpu_env, desc);
+
+    tcg_temp_free_ptr(dest);
+    tcg_temp_free_ptr(mask);
+    tcg_temp_free(base);
+    tcg_temp_free_i32(desc);
+    gen_set_label(over);
+    return true;
+}
+
+static bool ld_us_op(DisasContext *s, arg_r2nfvm *a, uint8_t seq)
+{
+    uint32_t data = 0;
+    gen_helper_ldst_us *fn;
+    static gen_helper_ldst_us * const fns[2][7][4] = {
+        /* masked unit stride load */
+        { { gen_helper_vlb_v_b_mask,  gen_helper_vlb_v_h_mask,
+            gen_helper_vlb_v_w_mask,  gen_helper_vlb_v_d_mask },
+          { NULL,                     gen_helper_vlh_v_h_mask,
+            gen_helper_vlh_v_w_mask,  gen_helper_vlh_v_d_mask },
+          { NULL,                     NULL,
+            gen_helper_vlw_v_w_mask,  gen_helper_vlw_v_d_mask },
+          { gen_helper_vle_v_b_mask,  gen_helper_vle_v_h_mask,
+            gen_helper_vle_v_w_mask,  gen_helper_vle_v_d_mask },
+          { gen_helper_vlbu_v_b_mask, gen_helper_vlbu_v_h_mask,
+            gen_helper_vlbu_v_w_mask, gen_helper_vlbu_v_d_mask },
+          { NULL,                     gen_helper_vlhu_v_h_mask,
+            gen_helper_vlhu_v_w_mask, gen_helper_vlhu_v_d_mask },
+          { NULL,                     NULL,
+            gen_helper_vlwu_v_w_mask, gen_helper_vlwu_v_d_mask } },
+        /* unmasked unit stride load */
+        { { gen_helper_vlb_v_b,  gen_helper_vlb_v_h,
+            gen_helper_vlb_v_w,  gen_helper_vlb_v_d },
+          { NULL,                gen_helper_vlh_v_h,
+            gen_helper_vlh_v_w,  gen_helper_vlh_v_d },
+          { NULL,                NULL,
+            gen_helper_vlw_v_w,  gen_helper_vlw_v_d },
+          { gen_helper_vle_v_b,  gen_helper_vle_v_h,
+            gen_helper_vle_v_w,  gen_helper_vle_v_d },
+          { gen_helper_vlbu_v_b, gen_helper_vlbu_v_h,
+            gen_helper_vlbu_v_w, gen_helper_vlbu_v_d },
+          { NULL,                gen_helper_vlhu_v_h,
+            gen_helper_vlhu_v_w, gen_helper_vlhu_v_d },
+          { NULL,                NULL,
+            gen_helper_vlwu_v_w, gen_helper_vlwu_v_d } }
+    };
+
+    fn =  fns[a->vm][seq][s->sew];
+    if (fn == NULL) {
+        return false;
+    }
+
+    data = FIELD_DP32(data, VDATA, MLEN, s->mlen);
+    data = FIELD_DP32(data, VDATA, VM, a->vm);
+    data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
+    data = FIELD_DP32(data, VDATA, NF, a->nf);
+    return ldst_us_trans(a->rd, a->rs1, data, fn, s);
+}
+
+static bool ld_us_check(DisasContext *s, arg_r2nfvm* a)
+{
+    return (vext_check_isa_ill(s) &&
+            vext_check_overlap_mask(s, a->rd, a->vm, false) &&
+            vext_check_reg(s, a->rd, false) &&
+            vext_check_nf(s, a->nf));
+}
+
+GEN_VEXT_TRANS(vlb_v, 0, r2nfvm, ld_us_op, ld_us_check)
+GEN_VEXT_TRANS(vlh_v, 1, r2nfvm, ld_us_op, ld_us_check)
+GEN_VEXT_TRANS(vlw_v, 2, r2nfvm, ld_us_op, ld_us_check)
+GEN_VEXT_TRANS(vle_v, 3, r2nfvm, ld_us_op, ld_us_check)
+GEN_VEXT_TRANS(vlbu_v, 4, r2nfvm, ld_us_op, ld_us_check)
+GEN_VEXT_TRANS(vlhu_v, 5, r2nfvm, ld_us_op, ld_us_check)
+GEN_VEXT_TRANS(vlwu_v, 6, r2nfvm, ld_us_op, ld_us_check)
+
+static bool st_us_op(DisasContext *s, arg_r2nfvm *a, uint8_t seq)
+{
+    uint32_t data = 0;
+    gen_helper_ldst_us *fn;
+    static gen_helper_ldst_us * const fns[2][4][4] = {
+        /* masked unit stride load and store */
+        { { gen_helper_vsb_v_b_mask,  gen_helper_vsb_v_h_mask,
+            gen_helper_vsb_v_w_mask,  gen_helper_vsb_v_d_mask },
+          { NULL,                     gen_helper_vsh_v_h_mask,
+            gen_helper_vsh_v_w_mask,  gen_helper_vsh_v_d_mask },
+          { NULL,                     NULL,
+            gen_helper_vsw_v_w_mask,  gen_helper_vsw_v_d_mask },
+          { gen_helper_vse_v_b_mask,  gen_helper_vse_v_h_mask,
+            gen_helper_vse_v_w_mask,  gen_helper_vse_v_d_mask } },
+        /* unmasked unit stride store */
+        { { gen_helper_vsb_v_b,  gen_helper_vsb_v_h,
+            gen_helper_vsb_v_w,  gen_helper_vsb_v_d },
+          { NULL,                gen_helper_vsh_v_h,
+            gen_helper_vsh_v_w,  gen_helper_vsh_v_d },
+          { NULL,                NULL,
+            gen_helper_vsw_v_w,  gen_helper_vsw_v_d },
+          { gen_helper_vse_v_b,  gen_helper_vse_v_h,
+            gen_helper_vse_v_w,  gen_helper_vse_v_d } }
+    };
+
+    fn =  fns[a->vm][seq][s->sew];
+    if (fn == NULL) {
+        return false;
+    }
+
+    data = FIELD_DP32(data, VDATA, MLEN, s->mlen);
+    data = FIELD_DP32(data, VDATA, VM, a->vm);
+    data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
+    data = FIELD_DP32(data, VDATA, NF, a->nf);
+    return ldst_us_trans(a->rd, a->rs1, data, fn, s);
+}
+
+static bool st_us_check(DisasContext *s, arg_r2nfvm* a)
+{
+    return (vext_check_isa_ill(s) &&
+            vext_check_reg(s, a->rd, false) &&
+            vext_check_nf(s, a->nf));
+}
+
+GEN_VEXT_TRANS(vsb_v, 0, r2nfvm, st_us_op, st_us_check)
+GEN_VEXT_TRANS(vsh_v, 1, r2nfvm, st_us_op, st_us_check)
+GEN_VEXT_TRANS(vsw_v, 2, r2nfvm, st_us_op, st_us_check)
+GEN_VEXT_TRANS(vse_v, 3, r2nfvm, st_us_op, st_us_check)
+
+/*
+ *** stride load and store
+ */
+typedef void gen_helper_ldst_stride(TCGv_ptr, TCGv_ptr, TCGv,
+                                    TCGv, TCGv_env, TCGv_i32);
+
+static bool ldst_stride_trans(uint32_t vd, uint32_t rs1, uint32_t rs2,
+                              uint32_t data, gen_helper_ldst_stride *fn,
+                              DisasContext *s)
+{
+    TCGv_ptr dest, mask;
+    TCGv base, stride;
+    TCGv_i32 desc;
+
+    TCGLabel *over = gen_new_label();
+    tcg_gen_brcondi_tl(TCG_COND_EQ, cpu_vl, 0, over);
+
+    dest = tcg_temp_new_ptr();
+    mask = tcg_temp_new_ptr();
+    base = tcg_temp_new();
+    stride = tcg_temp_new();
+    desc = tcg_const_i32(simd_desc(0, s->vlen / 8, data));
+
+    gen_get_gpr(base, rs1);
+    gen_get_gpr(stride, rs2);
+    tcg_gen_addi_ptr(dest, cpu_env, vreg_ofs(s, vd));
+    tcg_gen_addi_ptr(mask, cpu_env, vreg_ofs(s, 0));
+
+    fn(dest, mask, base, stride, cpu_env, desc);
+
+    tcg_temp_free_ptr(dest);
+    tcg_temp_free_ptr(mask);
+    tcg_temp_free(base);
+    tcg_temp_free(stride);
+    tcg_temp_free_i32(desc);
+    gen_set_label(over);
+    return true;
+}
+
+static bool ld_stride_op(DisasContext *s, arg_rnfvm *a, uint8_t seq)
+{
+    uint32_t data = 0;
+    gen_helper_ldst_stride *fn;
+    static gen_helper_ldst_stride * const fns[7][4] = {
+        { gen_helper_vlsb_v_b,  gen_helper_vlsb_v_h,
+          gen_helper_vlsb_v_w,  gen_helper_vlsb_v_d },
+        { NULL,                 gen_helper_vlsh_v_h,
+          gen_helper_vlsh_v_w,  gen_helper_vlsh_v_d },
+        { NULL,                 NULL,
+          gen_helper_vlsw_v_w,  gen_helper_vlsw_v_d },
+        { gen_helper_vlse_v_b,  gen_helper_vlse_v_h,
+          gen_helper_vlse_v_w,  gen_helper_vlse_v_d },
+        { gen_helper_vlsbu_v_b, gen_helper_vlsbu_v_h,
+          gen_helper_vlsbu_v_w, gen_helper_vlsbu_v_d },
+        { NULL,                 gen_helper_vlshu_v_h,
+          gen_helper_vlshu_v_w, gen_helper_vlshu_v_d },
+        { NULL,                 NULL,
+          gen_helper_vlswu_v_w, gen_helper_vlswu_v_d },
+    };
+
+    fn =  fns[seq][s->sew];
+    if (fn == NULL) {
+        return false;
+    }
+
+    data = FIELD_DP32(data, VDATA, MLEN, s->mlen);
+    data = FIELD_DP32(data, VDATA, VM, a->vm);
+    data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
+    data = FIELD_DP32(data, VDATA, NF, a->nf);
+    return ldst_stride_trans(a->rd, a->rs1, a->rs2, data, fn, s);
+}
+
+static bool ld_stride_check(DisasContext *s, arg_rnfvm* a)
+{
+    return (vext_check_isa_ill(s) &&
+            vext_check_overlap_mask(s, a->rd, a->vm, false) &&
+            vext_check_reg(s, a->rd, false) &&
+            vext_check_nf(s, a->nf));
+}
+
+GEN_VEXT_TRANS(vlsb_v, 0, rnfvm, ld_stride_op, ld_stride_check)
+GEN_VEXT_TRANS(vlsh_v, 1, rnfvm, ld_stride_op, ld_stride_check)
+GEN_VEXT_TRANS(vlsw_v, 2, rnfvm, ld_stride_op, ld_stride_check)
+GEN_VEXT_TRANS(vlse_v, 3, rnfvm, ld_stride_op, ld_stride_check)
+GEN_VEXT_TRANS(vlsbu_v, 4, rnfvm, ld_stride_op, ld_stride_check)
+GEN_VEXT_TRANS(vlshu_v, 5, rnfvm, ld_stride_op, ld_stride_check)
+GEN_VEXT_TRANS(vlswu_v, 6, rnfvm, ld_stride_op, ld_stride_check)
+
+static bool st_stride_op(DisasContext *s, arg_rnfvm *a, uint8_t seq)
+{
+    uint32_t data = 0;
+    gen_helper_ldst_stride *fn;
+    static gen_helper_ldst_stride * const fns[4][4] = {
+        /* masked stride store */
+        { gen_helper_vssb_v_b,  gen_helper_vssb_v_h,
+          gen_helper_vssb_v_w,  gen_helper_vssb_v_d },
+        { NULL,                 gen_helper_vssh_v_h,
+          gen_helper_vssh_v_w,  gen_helper_vssh_v_d },
+        { NULL,                 NULL,
+          gen_helper_vssw_v_w,  gen_helper_vssw_v_d },
+        { gen_helper_vsse_v_b,  gen_helper_vsse_v_h,
+          gen_helper_vsse_v_w,  gen_helper_vsse_v_d }
+    };
+
+    data = FIELD_DP32(data, VDATA, MLEN, s->mlen);
+    data = FIELD_DP32(data, VDATA, VM, a->vm);
+    data = FIELD_DP32(data, VDATA, LMUL, s->lmul);
+    data = FIELD_DP32(data, VDATA, NF, a->nf);
+    fn =  fns[seq][s->sew];
+    if (fn == NULL) {
+        return false;
+    }
+
+    return ldst_stride_trans(a->rd, a->rs1, a->rs2, data, fn, s);
+}
+
+static bool st_stride_check(DisasContext *s, arg_rnfvm* a)
+{
+    return (vext_check_isa_ill(s) &&
+            vext_check_reg(s, a->rd, false) &&
+            vext_check_nf(s, a->nf));
+}
+
+GEN_VEXT_TRANS(vssb_v, 0, rnfvm, st_stride_op, st_stride_check)
+GEN_VEXT_TRANS(vssh_v, 1, rnfvm, st_stride_op, st_stride_check)
+GEN_VEXT_TRANS(vssw_v, 2, rnfvm, st_stride_op, st_stride_check)
+GEN_VEXT_TRANS(vsse_v, 3, rnfvm, st_stride_op, st_stride_check)
diff --git a/target/riscv/internals.h b/target/riscv/internals.h
index 22a49af..3253e73 100644
--- a/target/riscv/internals.h
+++ b/target/riscv/internals.h
@@ -21,4 +21,9 @@
 
 #include "hw/registerfields.h"
 
+/* share data between vector helpers and decode code */
+FIELD(VDATA, MLEN, 0, 8)
+FIELD(VDATA, VM, 8, 1)
+FIELD(VDATA, LMUL, 9, 2)
+FIELD(VDATA, NF, 11, 4)
 #endif
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index cacb9b9..9632e79 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -61,6 +61,7 @@ typedef struct DisasContext {
     uint8_t lmul;
     uint8_t sew;
     uint16_t vlen;
+    uint16_t mlen;
     bool vl_eq_vlmax;
 } DisasContext;
 
@@ -548,6 +549,11 @@ static void decode_RV32_64C(DisasContext *ctx, uint16_t opcode)
     }
 }
 
+static int ex_plus_1(DisasContext *ctx, int nf)
+{
+    return nf + 1;
+}
+
 #define EX_SH(amount) \
     static int ex_shift_##amount(DisasContext *ctx, int imm) \
     {                                         \
@@ -785,6 +791,7 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     ctx->vill = FIELD_EX32(tb_flags, TB_FLAGS, VILL);
     ctx->sew = FIELD_EX32(tb_flags, TB_FLAGS, SEW);
     ctx->lmul = FIELD_EX32(tb_flags, TB_FLAGS, LMUL);
+    ctx->mlen = 1 << (ctx->sew  + 3 - ctx->lmul);
     ctx->vl_eq_vlmax = FIELD_EX32(tb_flags, TB_FLAGS, VL_EQ_VLMAX);
 }
 
diff --git a/target/riscv/vector_helper.c b/target/riscv/vector_helper.c
index 40ed0d5..5c98da8 100644
--- a/target/riscv/vector_helper.c
+++ b/target/riscv/vector_helper.c
@@ -18,8 +18,11 @@
 
 #include "qemu/osdep.h"
 #include "cpu.h"
+#include "exec/memop.h"
 #include "exec/exec-all.h"
 #include "exec/helper-proto.h"
+#include "tcg/tcg-gvec-desc.h"
+#include "internals.h"
 #include <math.h>
 
 target_ulong HELPER(vsetvl)(CPURISCVState *env, target_ulong s1,
@@ -51,3 +54,410 @@ target_ulong HELPER(vsetvl)(CPURISCVState *env, target_ulong s1,
     env->vstart = 0;
     return vl;
 }
+
+/*
+ * Note that vector data is stored in host-endian 64-bit chunks,
+ * so addressing units smaller than that needs a host-endian fixup.
+ */
+#ifdef HOST_WORDS_BIGENDIAN
+#define H1(x)   ((x) ^ 7)
+#define H1_2(x) ((x) ^ 6)
+#define H1_4(x) ((x) ^ 4)
+#define H2(x)   ((x) ^ 3)
+#define H4(x)   ((x) ^ 1)
+#define H8(x)   ((x))
+#else
+#define H1(x)   (x)
+#define H1_2(x) (x)
+#define H1_4(x) (x)
+#define H2(x)   (x)
+#define H4(x)   (x)
+#define H8(x)   (x)
+#endif
+
+static inline uint32_t vext_nf(uint32_t desc)
+{
+    return FIELD_EX32(simd_data(desc), VDATA, NF);
+}
+
+static inline uint32_t vext_mlen(uint32_t desc)
+{
+    return FIELD_EX32(simd_data(desc), VDATA, MLEN);
+}
+
+static inline uint32_t vext_vm(uint32_t desc)
+{
+    return FIELD_EX32(simd_data(desc), VDATA, VM);
+}
+
+static inline uint32_t vext_lmul(uint32_t desc)
+{
+    return FIELD_EX32(simd_data(desc), VDATA, LMUL);
+}
+
+/*
+ * Get vector group length in bytes. Its range is [64, 2048].
+ *
+ * As simd_desc support at most 256, the max vlen is 512 bits.
+ * So vlen in bytes is encoded as maxsz.
+ */
+static inline uint32_t vext_maxsz(uint32_t desc)
+{
+    return simd_maxsz(desc) << vext_lmul(desc);
+}
+
+/*
+ * This function checks watchpoint before real load operation.
+ *
+ * In softmmu mode, the TLB API probe_access is enough for watchpoint check.
+ * In user mode, there is no watchpoint support now.
+ *
+ * It will trigger an exception if there is no mapping in TLB
+ * and page table walk can't fill the TLB entry. Then the guest
+ * software can return here after process the exception or never return.
+ */
+static void probe_pages(CPURISCVState *env, target_ulong addr,
+                        target_ulong len, uintptr_t ra,
+                        MMUAccessType access_type)
+{
+    target_ulong pagelen = -(addr | TARGET_PAGE_MASK);
+    target_ulong curlen = MIN(pagelen, len);
+
+    probe_access(env, addr, curlen, access_type,
+                 cpu_mmu_index(env, false), ra);
+    if (len > curlen) {
+        addr += curlen;
+        curlen = len - curlen;
+        probe_access(env, addr, curlen, access_type,
+                     cpu_mmu_index(env, false), ra);
+    }
+}
+
+#ifdef HOST_WORDS_BIGENDIAN
+static void vext_clear(void *tail, uint32_t cnt, uint32_t tot)
+{
+    /*
+     * Split the remaining range to two parts.
+     * The first part is in the last uint64_t unit.
+     * The second part start from the next uint64_t unit.
+     */
+    int part1 = 0, part2 = tot - cnt;
+    if (cnt % 8) {
+        part1 = 8 - (cnt % 8);
+        part2 = tot - cnt - part1;
+        memset((void *)((uintptr_t)tail & ~(7ULL)), 0, part1);
+        memset((void *)(((uintptr_t)tail + 8) & ~(7ULL)), 0, part2);
+    } else {
+        memset(tail, 0, part2);
+    }
+}
+#else
+static void vext_clear(void *tail, uint32_t cnt, uint32_t tot)
+{
+    memset(tail, 0, tot - cnt);
+}
+#endif
+
+static void clearb(void *vd, uint32_t idx, uint32_t cnt, uint32_t tot)
+{
+    int8_t *cur = ((int8_t *)vd + H1(idx));
+    vext_clear(cur, cnt, tot);
+}
+
+static void clearh(void *vd, uint32_t idx, uint32_t cnt, uint32_t tot)
+{
+    int16_t *cur = ((int16_t *)vd + H2(idx));
+    vext_clear(cur, cnt, tot);
+}
+
+static void clearl(void *vd, uint32_t idx, uint32_t cnt, uint32_t tot)
+{
+    int32_t *cur = ((int32_t *)vd + H4(idx));
+    vext_clear(cur, cnt, tot);
+}
+
+static void clearq(void *vd, uint32_t idx, uint32_t cnt, uint32_t tot)
+{
+    int64_t *cur = (int64_t *)vd + idx;
+    vext_clear(cur, cnt, tot);
+}
+
+
+static inline int vext_elem_mask(void *v0, int mlen, int index)
+{
+    int idx = (index * mlen) / 64;
+    int pos = (index * mlen) % 64;
+    return (((uint64_t *)v0)[idx] >> pos) & 1;
+}
+
+/* elements operations for load and store */
+typedef void vext_ldst_elem_fn(CPURISCVState *env, target_ulong addr,
+                               uint32_t idx, void *vd, uintptr_t retaddr);
+typedef void clear_fn(void *vd, uint32_t idx, uint32_t cnt, uint32_t tot);
+
+#define GEN_VEXT_LD_ELEM(NAME, MTYPE, ETYPE, H, LDSUF)     \
+static void NAME(CPURISCVState *env, abi_ptr addr,         \
+                 uint32_t idx, void *vd, uintptr_t retaddr)\
+{                                                          \
+    MTYPE data;                                            \
+    ETYPE *cur = ((ETYPE *)vd + H(idx));                   \
+    data = cpu_##LDSUF##_data_ra(env, addr, retaddr);      \
+    *cur = data;                                           \
+}                                                          \
+
+GEN_VEXT_LD_ELEM(ldb_b, int8_t,  int8_t,  H1, ldsb)
+GEN_VEXT_LD_ELEM(ldb_h, int8_t,  int16_t, H2, ldsb)
+GEN_VEXT_LD_ELEM(ldb_w, int8_t,  int32_t, H4, ldsb)
+GEN_VEXT_LD_ELEM(ldb_d, int8_t,  int64_t, H8, ldsb)
+GEN_VEXT_LD_ELEM(ldh_h, int16_t, int16_t, H2, ldsw)
+GEN_VEXT_LD_ELEM(ldh_w, int16_t, int32_t, H4, ldsw)
+GEN_VEXT_LD_ELEM(ldh_d, int16_t, int64_t, H8, ldsw)
+GEN_VEXT_LD_ELEM(ldw_w, int32_t, int32_t, H4, ldl)
+GEN_VEXT_LD_ELEM(ldw_d, int32_t, int64_t, H8, ldl)
+GEN_VEXT_LD_ELEM(lde_b, int8_t,  int8_t,  H1, ldsb)
+GEN_VEXT_LD_ELEM(lde_h, int16_t, int16_t, H2, ldsw)
+GEN_VEXT_LD_ELEM(lde_w, int32_t, int32_t, H4, ldl)
+GEN_VEXT_LD_ELEM(lde_d, int64_t, int64_t, H8, ldq)
+GEN_VEXT_LD_ELEM(ldbu_b, uint8_t,  uint8_t,  H1, ldub)
+GEN_VEXT_LD_ELEM(ldbu_h, uint8_t,  uint16_t, H2, ldub)
+GEN_VEXT_LD_ELEM(ldbu_w, uint8_t,  uint32_t, H4, ldub)
+GEN_VEXT_LD_ELEM(ldbu_d, uint8_t,  uint64_t, H8, ldub)
+GEN_VEXT_LD_ELEM(ldhu_h, uint16_t, uint16_t, H2, lduw)
+GEN_VEXT_LD_ELEM(ldhu_w, uint16_t, uint32_t, H4, lduw)
+GEN_VEXT_LD_ELEM(ldhu_d, uint16_t, uint64_t, H8, lduw)
+GEN_VEXT_LD_ELEM(ldwu_w, uint32_t, uint32_t, H4, ldl)
+GEN_VEXT_LD_ELEM(ldwu_d, uint32_t, uint64_t, H8, ldl)
+
+#define GEN_VEXT_ST_ELEM(NAME, ETYPE, H, STSUF)            \
+static void NAME(CPURISCVState *env, abi_ptr addr,         \
+                 uint32_t idx, void *vd, uintptr_t retaddr)\
+{                                                          \
+    ETYPE data = *((ETYPE *)vd + H(idx));                  \
+    cpu_##STSUF##_data_ra(env, addr, data, retaddr);       \
+}
+
+GEN_VEXT_ST_ELEM(stb_b, int8_t,  H1, stb)
+GEN_VEXT_ST_ELEM(stb_h, int16_t, H2, stb)
+GEN_VEXT_ST_ELEM(stb_w, int32_t, H4, stb)
+GEN_VEXT_ST_ELEM(stb_d, int64_t, H8, stb)
+GEN_VEXT_ST_ELEM(sth_h, int16_t, H2, stw)
+GEN_VEXT_ST_ELEM(sth_w, int32_t, H4, stw)
+GEN_VEXT_ST_ELEM(sth_d, int64_t, H8, stw)
+GEN_VEXT_ST_ELEM(stw_w, int32_t, H4, stl)
+GEN_VEXT_ST_ELEM(stw_d, int64_t, H8, stl)
+GEN_VEXT_ST_ELEM(ste_b, int8_t,  H1, stb)
+GEN_VEXT_ST_ELEM(ste_h, int16_t, H2, stw)
+GEN_VEXT_ST_ELEM(ste_w, int32_t, H4, stl)
+GEN_VEXT_ST_ELEM(ste_d, int64_t, H8, stq)
+
+/*
+ *** stride: access vector element from strided memory
+ */
+static void
+vext_ldst_stride(void *vd, void *v0, target_ulong base,
+                 target_ulong stride, CPURISCVState *env,
+                 uint32_t desc, uint32_t vm,
+                 vext_ldst_elem_fn *ldst_elem, clear_fn *clear_elem,
+                 uint32_t esz, uint32_t msz, uintptr_t ra,
+                 MMUAccessType access_type)
+{
+    uint32_t i, k;
+    uint32_t nf = vext_nf(desc);
+    uint32_t mlen = vext_mlen(desc);
+    uint32_t vlmax = vext_maxsz(desc) / esz;
+
+    /* probe every access*/
+    for (i = 0; i < env->vl; i++) {
+        if (!vm && !vext_elem_mask(v0, mlen, i)) {
+            continue;
+        }
+        probe_pages(env, base + stride * i, nf * msz, ra, access_type);
+    }
+    /* do real access */
+    for (i = 0; i < env->vl; i++) {
+        k = 0;
+        if (!vm && !vext_elem_mask(v0, mlen, i)) {
+            continue;
+        }
+        while (k < nf) {
+            target_ulong addr = base + stride * i + k * msz;
+            ldst_elem(env, addr, i + k * vlmax, vd, ra);
+            k++;
+        }
+    }
+    /* clear tail elements */
+    if (clear_elem) {
+        for (k = 0; k < nf; k++) {
+            clear_elem(vd, env->vl + k * vlmax, env->vl * esz, vlmax * esz);
+        }
+    }
+}
+
+#define GEN_VEXT_LD_STRIDE(NAME, MTYPE, ETYPE, LOAD_FN, CLEAR_FN)       \
+void HELPER(NAME)(void *vd, void * v0, target_ulong base,               \
+                  target_ulong stride, CPURISCVState *env,              \
+                  uint32_t desc)                                        \
+{                                                                       \
+    uint32_t vm = vext_vm(desc);                                        \
+    vext_ldst_stride(vd, v0, base, stride, env, desc, vm, LOAD_FN,      \
+                     CLEAR_FN, sizeof(ETYPE), sizeof(MTYPE),            \
+                     GETPC(), MMU_DATA_LOAD);                           \
+}
+
+GEN_VEXT_LD_STRIDE(vlsb_v_b,  int8_t,   int8_t,   ldb_b,  clearb)
+GEN_VEXT_LD_STRIDE(vlsb_v_h,  int8_t,   int16_t,  ldb_h,  clearh)
+GEN_VEXT_LD_STRIDE(vlsb_v_w,  int8_t,   int32_t,  ldb_w,  clearl)
+GEN_VEXT_LD_STRIDE(vlsb_v_d,  int8_t,   int64_t,  ldb_d,  clearq)
+GEN_VEXT_LD_STRIDE(vlsh_v_h,  int16_t,  int16_t,  ldh_h,  clearh)
+GEN_VEXT_LD_STRIDE(vlsh_v_w,  int16_t,  int32_t,  ldh_w,  clearl)
+GEN_VEXT_LD_STRIDE(vlsh_v_d,  int16_t,  int64_t,  ldh_d,  clearq)
+GEN_VEXT_LD_STRIDE(vlsw_v_w,  int32_t,  int32_t,  ldw_w,  clearl)
+GEN_VEXT_LD_STRIDE(vlsw_v_d,  int32_t,  int64_t,  ldw_d,  clearq)
+GEN_VEXT_LD_STRIDE(vlse_v_b,  int8_t,   int8_t,   lde_b,  clearb)
+GEN_VEXT_LD_STRIDE(vlse_v_h,  int16_t,  int16_t,  lde_h,  clearh)
+GEN_VEXT_LD_STRIDE(vlse_v_w,  int32_t,  int32_t,  lde_w,  clearl)
+GEN_VEXT_LD_STRIDE(vlse_v_d,  int64_t,  int64_t,  lde_d,  clearq)
+GEN_VEXT_LD_STRIDE(vlsbu_v_b, uint8_t,  uint8_t,  ldbu_b, clearb)
+GEN_VEXT_LD_STRIDE(vlsbu_v_h, uint8_t,  uint16_t, ldbu_h, clearh)
+GEN_VEXT_LD_STRIDE(vlsbu_v_w, uint8_t,  uint32_t, ldbu_w, clearl)
+GEN_VEXT_LD_STRIDE(vlsbu_v_d, uint8_t,  uint64_t, ldbu_d, clearq)
+GEN_VEXT_LD_STRIDE(vlshu_v_h, uint16_t, uint16_t, ldhu_h, clearh)
+GEN_VEXT_LD_STRIDE(vlshu_v_w, uint16_t, uint32_t, ldhu_w, clearl)
+GEN_VEXT_LD_STRIDE(vlshu_v_d, uint16_t, uint64_t, ldhu_d, clearq)
+GEN_VEXT_LD_STRIDE(vlswu_v_w, uint32_t, uint32_t, ldwu_w, clearl)
+GEN_VEXT_LD_STRIDE(vlswu_v_d, uint32_t, uint64_t, ldwu_d, clearq)
+
+#define GEN_VEXT_ST_STRIDE(NAME, MTYPE, ETYPE, STORE_FN)                \
+void HELPER(NAME)(void *vd, void *v0, target_ulong base,                \
+                  target_ulong stride, CPURISCVState *env,              \
+                  uint32_t desc)                                        \
+{                                                                       \
+    uint32_t vm = vext_vm(desc);                                        \
+    vext_ldst_stride(vd, v0, base, stride, env, desc, vm, STORE_FN,     \
+                     NULL, sizeof(ETYPE), sizeof(MTYPE),                \
+                     GETPC(), MMU_DATA_STORE);                          \
+}
+
+GEN_VEXT_ST_STRIDE(vssb_v_b, int8_t,  int8_t,  stb_b)
+GEN_VEXT_ST_STRIDE(vssb_v_h, int8_t,  int16_t, stb_h)
+GEN_VEXT_ST_STRIDE(vssb_v_w, int8_t,  int32_t, stb_w)
+GEN_VEXT_ST_STRIDE(vssb_v_d, int8_t,  int64_t, stb_d)
+GEN_VEXT_ST_STRIDE(vssh_v_h, int16_t, int16_t, sth_h)
+GEN_VEXT_ST_STRIDE(vssh_v_w, int16_t, int32_t, sth_w)
+GEN_VEXT_ST_STRIDE(vssh_v_d, int16_t, int64_t, sth_d)
+GEN_VEXT_ST_STRIDE(vssw_v_w, int32_t, int32_t, stw_w)
+GEN_VEXT_ST_STRIDE(vssw_v_d, int32_t, int64_t, stw_d)
+GEN_VEXT_ST_STRIDE(vsse_v_b, int8_t,  int8_t,  ste_b)
+GEN_VEXT_ST_STRIDE(vsse_v_h, int16_t, int16_t, ste_h)
+GEN_VEXT_ST_STRIDE(vsse_v_w, int32_t, int32_t, ste_w)
+GEN_VEXT_ST_STRIDE(vsse_v_d, int64_t, int64_t, ste_d)
+
+/*
+ *** unit-stride: access elements stored contiguously in memory
+ */
+
+/* unmasked unit-stride load and store operation*/
+static void
+vext_ldst_us(void *vd, target_ulong base, CPURISCVState *env, uint32_t desc,
+             vext_ldst_elem_fn *ldst_elem, clear_fn *clear_elem,
+             uint32_t esz, uint32_t msz, uintptr_t ra,
+             MMUAccessType access_type)
+{
+    uint32_t i, k;
+    uint32_t nf = vext_nf(desc);
+    uint32_t vlmax = vext_maxsz(desc) / esz;
+
+    /* probe every access */
+    probe_pages(env, base, env->vl * nf * msz, ra, access_type);
+    /* load bytes from guest memory */
+    for (i = 0; i < env->vl; i++) {
+        k = 0;
+        while (k < nf) {
+            target_ulong addr = base + (i * nf + k) * msz;
+            ldst_elem(env, addr, i + k * vlmax, vd, ra);
+            k++;
+        }
+    }
+    /* clear tail elements */
+    if (clear_elem) {
+        for (k = 0; k < nf; k++) {
+            clear_elem(vd, env->vl + k * vlmax, env->vl * esz, vlmax * esz);
+        }
+    }
+}
+
+/*
+ * masked unit-stride load and store operation will be a special case of stride,
+ * stride = NF * sizeof (MTYPE)
+ */
+
+#define GEN_VEXT_LD_US(NAME, MTYPE, ETYPE, LOAD_FN, CLEAR_FN)           \
+void HELPER(NAME##_mask)(void *vd, void *v0, target_ulong base,         \
+                         CPURISCVState *env, uint32_t desc)             \
+{                                                                       \
+    uint32_t stride = vext_nf(desc) * sizeof(MTYPE);                    \
+    vext_ldst_stride(vd, v0, base, stride, env, desc, false, LOAD_FN,   \
+                     CLEAR_FN, sizeof(ETYPE), sizeof(MTYPE),            \
+                     GETPC(), MMU_DATA_LOAD);                           \
+}                                                                       \
+                                                                        \
+void HELPER(NAME)(void *vd, void *v0, target_ulong base,                \
+                  CPURISCVState *env, uint32_t desc)                    \
+{                                                                       \
+    vext_ldst_us(vd, base, env, desc, LOAD_FN, CLEAR_FN,                \
+                 sizeof(ETYPE), sizeof(MTYPE), GETPC(), MMU_DATA_LOAD); \
+}
+
+GEN_VEXT_LD_US(vlb_v_b,  int8_t,   int8_t,   ldb_b,  clearb)
+GEN_VEXT_LD_US(vlb_v_h,  int8_t,   int16_t,  ldb_h,  clearh)
+GEN_VEXT_LD_US(vlb_v_w,  int8_t,   int32_t,  ldb_w,  clearl)
+GEN_VEXT_LD_US(vlb_v_d,  int8_t,   int64_t,  ldb_d,  clearq)
+GEN_VEXT_LD_US(vlh_v_h,  int16_t,  int16_t,  ldh_h,  clearh)
+GEN_VEXT_LD_US(vlh_v_w,  int16_t,  int32_t,  ldh_w,  clearl)
+GEN_VEXT_LD_US(vlh_v_d,  int16_t,  int64_t,  ldh_d,  clearq)
+GEN_VEXT_LD_US(vlw_v_w,  int32_t,  int32_t,  ldw_w,  clearl)
+GEN_VEXT_LD_US(vlw_v_d,  int32_t,  int64_t,  ldw_d,  clearq)
+GEN_VEXT_LD_US(vle_v_b,  int8_t,   int8_t,   lde_b,  clearb)
+GEN_VEXT_LD_US(vle_v_h,  int16_t,  int16_t,  lde_h,  clearh)
+GEN_VEXT_LD_US(vle_v_w,  int32_t,  int32_t,  lde_w,  clearl)
+GEN_VEXT_LD_US(vle_v_d,  int64_t,  int64_t,  lde_d,  clearq)
+GEN_VEXT_LD_US(vlbu_v_b, uint8_t,  uint8_t,  ldbu_b, clearb)
+GEN_VEXT_LD_US(vlbu_v_h, uint8_t,  uint16_t, ldbu_h, clearh)
+GEN_VEXT_LD_US(vlbu_v_w, uint8_t,  uint32_t, ldbu_w, clearl)
+GEN_VEXT_LD_US(vlbu_v_d, uint8_t,  uint64_t, ldbu_d, clearq)
+GEN_VEXT_LD_US(vlhu_v_h, uint16_t, uint16_t, ldhu_h, clearh)
+GEN_VEXT_LD_US(vlhu_v_w, uint16_t, uint32_t, ldhu_w, clearl)
+GEN_VEXT_LD_US(vlhu_v_d, uint16_t, uint64_t, ldhu_d, clearq)
+GEN_VEXT_LD_US(vlwu_v_w, uint32_t, uint32_t, ldwu_w, clearl)
+GEN_VEXT_LD_US(vlwu_v_d, uint32_t, uint64_t, ldwu_d, clearq)
+
+#define GEN_VEXT_ST_US(NAME, MTYPE, ETYPE, STORE_FN)                    \
+void HELPER(NAME##_mask)(void *vd, void *v0, target_ulong base,         \
+                         CPURISCVState *env, uint32_t desc)             \
+{                                                                       \
+    uint32_t stride = vext_nf(desc) * sizeof(MTYPE);                    \
+    vext_ldst_stride(vd, v0, base, stride, env, desc, false, STORE_FN,  \
+                     NULL, sizeof(ETYPE), sizeof(MTYPE),                \
+                     GETPC(), MMU_DATA_STORE);                          \
+}                                                                       \
+                                                                        \
+void HELPER(NAME)(void *vd, void *v0, target_ulong base,                \
+                  CPURISCVState *env, uint32_t desc)                    \
+{                                                                       \
+    vext_ldst_us(vd, base, env, desc, STORE_FN, NULL,                   \
+                 sizeof(ETYPE), sizeof(MTYPE), GETPC(), MMU_DATA_STORE);\
+}
+
+GEN_VEXT_ST_US(vsb_v_b, int8_t,  int8_t , stb_b)
+GEN_VEXT_ST_US(vsb_v_h, int8_t,  int16_t, stb_h)
+GEN_VEXT_ST_US(vsb_v_w, int8_t,  int32_t, stb_w)
+GEN_VEXT_ST_US(vsb_v_d, int8_t,  int64_t, stb_d)
+GEN_VEXT_ST_US(vsh_v_h, int16_t, int16_t, sth_h)
+GEN_VEXT_ST_US(vsh_v_w, int16_t, int32_t, sth_w)
+GEN_VEXT_ST_US(vsh_v_d, int16_t, int64_t, sth_d)
+GEN_VEXT_ST_US(vsw_v_w, int32_t, int32_t, stw_w)
+GEN_VEXT_ST_US(vsw_v_d, int32_t, int64_t, stw_d)
+GEN_VEXT_ST_US(vse_v_b, int8_t,  int8_t , ste_b)
+GEN_VEXT_ST_US(vse_v_h, int16_t, int16_t, ste_h)
+GEN_VEXT_ST_US(vse_v_w, int32_t, int32_t, ste_w)
+GEN_VEXT_ST_US(vse_v_d, int64_t, int64_t, ste_d)