Fix mask and disassembly typos in Vector extension

Fix incorrect use of `vm_val` instead of `mask`, and a copy/paste error for the `vsox*` disassembly.

Co-authored-by: Yui5427 <[email protected]>

model/riscv_insts_vext_mem.sail

@@ -146,7 +146,7 @@ function process_vlsegff (nf, vm, vd, load_width_bytes, rs1, EMUL_pow, num_elem)
   var trimmed : bool = false;
   foreach (i from 0 to (num_elem - 1)) {
     if not(trimmed) then {
-      if vm_val[i] then { /* active segments */
+      if mask[i] then { /* active segments */
         foreach (j from 0 to (nf - 1)) {
           let elem_offset = (i * nf + j) * load_width_bytes;
           match ext_data_get_addr(rs1, to_bits(xlen, elem_offset), Read(Data), load_width_bytes) {
@@ -247,7 +247,7 @@ function process_vsseg (nf, vm, vs3, load_width_bytes, rs1, EMUL_pow, num_elem)
   let mask    : vector('n, bool) = init_masked_source(num_elem, EMUL_pow, vm_val);
 
   foreach (i from 0 to (num_elem - 1)) {
-    if vm_val[i] then { /* active segments */
+    if mask[i] then { /* active segments */
       vstart = to_bits(16, i);
       foreach (j from 0 to (nf - 1)) {
         let elem_offset = (i * nf + j) * load_width_bytes;
@@ -622,7 +622,7 @@ function clause execute(VSOXSEGTYPE(nf, vm, vs2, rs1, width, vs3)) = {
   process_vsxseg(nf_int, vm, vs3, EEW_index_bytes, EEW_data_bytes, EMUL_index_pow, EMUL_data_pow, rs1, vs2, num_elem, 3)
 }
 
-mapping clause assembly = VSUXSEGTYPE(nf, vm, vs2, rs1, width, vs3)
+mapping clause assembly = VSOXSEGTYPE(nf, vm, vs2, rs1, width, vs3)
   <-> "vsox" ^ nfields_string(nf) ^ "ei" ^ vlewidth_bitsnumberstr(width) ^ ".v" ^ spc() ^ vreg_name(vs3) ^ sep() ^ "(" ^ reg_name(rs1) ^ ")" ^ sep() ^ reg_name(vs2) ^ maybe_vmask(vm)
 
 /* ***************** Vector Load Unit-Stride Whole Register (vm=0b1, mop=0b00, lumop=0b01000) ****************** */