diff --git a/generator/insn_g.go b/generator/insn_g.go
index 86aaf72..cf06d61 100644
--- a/generator/insn_g.go
+++ b/generator/insn_g.go
@@ -23,7 +23,7 @@ func (i *Insn) gWriteRandomData(lmul LMUL) string {
 	return builder.String()
 }
 
-func (i *Insn) gWriteIndexData(lmul1 LMUL, n int, sew SEW) string {
+func (i *Insn) gWriteIndexData(lmul1 LMUL, n int, width SEW, sew SEW) string {
 	if n <= 0 {
 		n = 1
 	}
@@ -34,13 +34,13 @@ func (i *Insn) gWriteIndexData(lmul1 LMUL, n int, sew SEW) string {
 	for a := 0; a < nBytes/(int(sew)/8); a++ {
 		switch sew {
 		case 8:
-			_ = binary.Write(buf, binary.LittleEndian, uint8(s[a%n]))
+			_ = binary.Write(buf, binary.LittleEndian, uint8(s[a%n]*int(width)/8))
 		case 16:
-			_ = binary.Write(buf, binary.LittleEndian, uint16(s[a%n]*2))
+			_ = binary.Write(buf, binary.LittleEndian, uint16(s[a%n]*int(width)/8))
 		case 32:
-			_ = binary.Write(buf, binary.LittleEndian, uint32(s[a%n]*4))
+			_ = binary.Write(buf, binary.LittleEndian, uint32(s[a%n]*int(width)/8))
 		case 64:
-			_ = binary.Write(buf, binary.LittleEndian, uint64(s[a%n]*8))
+			_ = binary.Write(buf, binary.LittleEndian, uint64(s[a%n]*int(width)/8))
 		}
 	}
 	off := i.TestData.Append(buf.Bytes())
diff --git a/generator/insn_vdrs1mvs2vm.go b/generator/insn_vdrs1mvs2vm.go
index 126741e..5c78887 100644
--- a/generator/insn_vdrs1mvs2vm.go
+++ b/generator/insn_vdrs1mvs2vm.go
@@ -15,31 +15,43 @@ func (i *Insn) genCodeVdRs1mVs2Vm() []string {
 	res := make([]string, 0, len(combinations))
 
 	for _, c := range combinations {
-		builder := strings.Builder{}
-		builder.WriteString(c.comment())
-
-		builder.WriteString(i.gWriteRandomData(LMUL(1)))
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
-
-		lmul1 := LMUL(math.Max(float64(c.LMUL)*float64(nfields), 1))
-		vd := int(lmul1)
-		vs2 := 2 * int(c.LMUL1) * nfields
-		builder.WriteString(i.gWriteIndexData(lmul1, c.Vl, c.SEW))
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(vs2, lmul1, c.SEW))
-		builder.WriteString(i.gWriteRandomData(lmul1))
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, lmul1, c.SEW))
-		builder.WriteString(i.gWriteIntegerTestData(lmul1, c.SEW, 0))
-
-		builder.WriteString("# -------------- TEST BEGIN --------------\n")
-		builder.WriteString(i.gVsetvli(c.Vl, c.SEW, c.LMUL))
-		builder.WriteString(fmt.Sprintf("%s v%d, (a0), v%d%s\n", i.Name, vd, vs2, v0t(c.Mask)))
-		builder.WriteString("# -------------- TEST END   --------------\n")
-
-		builder.WriteString(i.gResultDataAddr())
-		builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, lmul1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vd))
-
-		res = append(res, builder.String())
+		// sew is data width, c.SEW is offset width
+		var sew SEW = 8
+		for ; sew <= SEW(i.Option.XLEN); sew <<= 1 {
+			if int(sew) > int(float64(i.Option.XLEN)*float64(c.LMUL)) {
+				continue
+			}
+			emul := (float64(c.SEW) / float64(sew)) * float64(c.LMUL)
+			if emul > 8 || emul < 1./8 {
+				continue
+			}
+			emul = math.Max(emul, 1)
+			builder := strings.Builder{}
+			builder.WriteString(c.comment())
+
+			builder.WriteString(i.gWriteRandomData(LMUL(1)))
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
+
+			lmul1 := LMUL(math.Max(float64(c.LMUL)*float64(nfields), 1))
+			vd := int(lmul1)
+			vs2 := 2 * int(math.Max(emul, float64(int(c.LMUL1)*nfields)))
+
+			builder.WriteString(i.gWriteIndexData(LMUL(emul), c.Vl, sew, c.SEW))
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(vs2, LMUL(emul), c.SEW))
+			builder.WriteString(i.gWriteRandomData(lmul1))
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(vd, lmul1, sew))
+			builder.WriteString(i.gWriteIntegerTestData(lmul1, sew, 0))
+
+			builder.WriteString("# -------------- TEST BEGIN --------------\n")
+			builder.WriteString(i.gVsetvli(c.Vl, sew, c.LMUL))
+			builder.WriteString(fmt.Sprintf("%s v%d, (a0), v%d%s\n", i.Name, vd, vs2, v0t(c.Mask)))
+			builder.WriteString("# -------------- TEST END   --------------\n")
+
+			builder.WriteString(i.gResultDataAddr())
+			builder.WriteString(i.gStoreRegisterGroupIntoResultData(vd, lmul1, sew))
+			builder.WriteString(i.gMagicInsn(vd))
+			res = append(res, builder.String())
+		}
 	}
 
 	return res
diff --git a/generator/insn_vs3rs1mvs2vm.go b/generator/insn_vs3rs1mvs2vm.go
index f3445a2..e62408f 100644
--- a/generator/insn_vs3rs1mvs2vm.go
+++ b/generator/insn_vs3rs1mvs2vm.go
@@ -15,30 +15,42 @@ func (i *Insn) genCodeVs3Rs1mVs2Vm() []string {
 	res := make([]string, 0, len(combinations))
 
 	for _, c := range combinations {
-		builder := strings.Builder{}
-		builder.WriteString(c.comment())
-
-		builder.WriteString(i.gWriteRandomData(LMUL(1)))
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
-
-		lmul1 := LMUL(math.Max(float64(c.LMUL)*float64(nfields), 1))
-		vs3 := int(lmul1)
-		vs1 := 2 * int(c.LMUL1) * nfields
-		builder.WriteString(i.gWriteIntegerTestData(lmul1, c.SEW, 0))
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(vs3, lmul1, c.SEW))
-		builder.WriteString(i.gWriteIndexData(lmul1, c.Vl, c.SEW))
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(vs1, lmul1, c.SEW))
-
-		builder.WriteString(i.gResultDataAddr())
-		builder.WriteString("# -------------- TEST BEGIN --------------\n")
-		builder.WriteString(i.gVsetvli(c.Vl, c.SEW, c.LMUL))
-		builder.WriteString(fmt.Sprintf("%s v%d, (a0), v%d%s\n", i.Name, vs3, vs1, v0t(c.Mask)))
-		builder.WriteString("# -------------- TEST END   --------------\n")
-
-		builder.WriteString(i.gLoadDataIntoRegisterGroup(vs3, lmul1, c.SEW))
-		builder.WriteString(i.gMagicInsn(vs3))
-
-		res = append(res, builder.String())
+		// sew is data width, c.SEW is offset width
+		var sew SEW = 8
+		for ; sew <= SEW(i.Option.XLEN); sew <<= 1 {
+			if int(sew) > int(float64(i.Option.XLEN)*float64(c.LMUL)) {
+				continue
+			}
+			emul := (float64(c.SEW) / float64(sew)) * float64(c.LMUL)
+			if emul > 8 || emul < 1./8 {
+				continue
+			}
+			emul = math.Max(emul, 1)
+			builder := strings.Builder{}
+			builder.WriteString(c.comment())
+
+			builder.WriteString(i.gWriteRandomData(LMUL(1)))
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(0, LMUL(1), SEW(32)))
+
+			lmul1 := LMUL(math.Max(float64(c.LMUL)*float64(nfields), 1))
+			vs3 := int(lmul1)
+			vs1 := 2 * int(math.Max(emul, float64(int(c.LMUL1)*nfields)))
+			builder.WriteString(i.gWriteIntegerTestData(lmul1, sew, 0))
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(vs3, lmul1, sew))
+			builder.WriteString(i.gWriteIndexData(LMUL(emul), c.Vl, sew, c.SEW))
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(vs1, LMUL(emul), c.SEW))
+
+			builder.WriteString(i.gResultDataAddr())
+			builder.WriteString("# -------------- TEST BEGIN --------------\n")
+			builder.WriteString(i.gVsetvli(c.Vl, sew, c.LMUL))
+			builder.WriteString(fmt.Sprintf("%s v%d, (a0), v%d%s\n", i.Name, vs3, vs1, v0t(c.Mask)))
+			builder.WriteString("# -------------- TEST END   --------------\n")
+
+			builder.WriteString(i.gLoadDataIntoRegisterGroup(vs3, lmul1, sew))
+			builder.WriteString(i.gMagicInsn(vs3))
+
+			res = append(res, builder.String())
+		}
 	}
 	return res
 }