diff --git a/maint/GenerateUcd.py b/maint/GenerateUcd.py
index 34cc57b..08f3949 100755
--- a/maint/GenerateUcd.py
+++ b/maint/GenerateUcd.py
@@ -780,7 +780,7 @@ for d in script_lists:
   bitwords = [0] * script_list_item_size
 
   for idx in d:
-    bitwords[idx // 32] |= 1 << (idx % 31)
+    bitwords[idx // 32] |= 1 << (idx & 31)
 
   s = " "
   for x in bitwords:
diff --git a/src/pcre2_jit_compile.c b/src/pcre2_jit_compile.c
index 3fb2731..06dc0a5 100644
--- a/src/pcre2_jit_compile.c
+++ b/src/pcre2_jit_compile.c
@@ -7417,9 +7417,10 @@ static PCRE2_SPTR compile_char1_matchingpath(compiler_common *common, PCRE2_UCHA
 #define XCLASS_CHAR_SAVED 0x02
 #define XCLASS_HAS_TYPE 0x04
 #define XCLASS_HAS_SCRIPT 0x08
-#define XCLASS_HAS_BIDICO 0x10
-#define XCLASS_HAS_BIDICL 0x20
-#define XCLASS_NEEDS_UCD (XCLASS_HAS_TYPE | XCLASS_HAS_SCRIPT | XCLASS_HAS_BIDICO | XCLASS_HAS_BIDICL)
+#define XCLASS_HAS_SCRIPT_EXTENSION 0x10
+#define XCLASS_HAS_BIDICO 0x20
+#define XCLASS_HAS_BIDICL 0x40
+#define XCLASS_NEEDS_UCD (XCLASS_HAS_TYPE | XCLASS_HAS_SCRIPT | XCLASS_HAS_SCRIPT_EXTENSION | XCLASS_HAS_BIDICO | XCLASS_HAS_BIDICL)
 #endif /* SUPPORT_UNICODE */
 
 static void compile_xclass_matchingpath(compiler_common *common, PCRE2_SPTR cc, jump_list **backtracks)
@@ -7518,6 +7519,10 @@ while (*cc != XCL_END)
       unicode_status |= XCLASS_HAS_TYPE;
       break;
 
+      case PT_SCX:
+      unicode_status |= XCLASS_HAS_SCRIPT_EXTENSION;
+      compares++;
+
       case PT_SC:
       unicode_status |= XCLASS_HAS_SCRIPT;
       break;
@@ -7674,7 +7679,7 @@ if (unicode_status & XCLASS_NEEDS_UCD)
         {
         SLJIT_ASSERT(*cc == XCL_PROP || *cc == XCL_NOTPROP);
         cc++;
-        if (*cc == PT_SC)
+        if (*cc == PT_SC || *cc == PT_SCX)
           {
           compares--;
           invertcmp = (compares == 0 && list != backtracks);
@@ -7690,6 +7695,46 @@ if (unicode_status & XCLASS_NEEDS_UCD)
     cc = ccbegin;
     }
 
+  if (unicode_status & XCLASS_HAS_SCRIPT_EXTENSION)
+    {
+    while (*cc != XCL_END)
+      {
+      if (*cc == XCL_SINGLE)
+        {
+        cc ++;
+        GETCHARINCTEST(c, cc);
+        }
+      else if (*cc == XCL_RANGE)
+        {
+        cc ++;
+        GETCHARINCTEST(c, cc);
+        GETCHARINCTEST(c, cc);
+        }
+      else
+        {
+        SLJIT_ASSERT(*cc == XCL_PROP || *cc == XCL_NOTPROP);
+        cc++;
+        if (*cc == PT_SCX)
+          {
+          OP1(SLJIT_MOV_U8, TMP1, 0, SLJIT_MEM1(TMP2), (sljit_sw)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, scriptx));
+          OP2(SLJIT_SHL, TMP1, 0, TMP1, 0, SLJIT_IMM, 2);
+          OP1(SLJIT_MOV_U32, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_sw)(PRIV(ucd_script_sets) + (cc[1] >> 5)));
+          OP2(SLJIT_AND | SLJIT_SET_Z, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, (sljit_sw)1 << (cc[1] & 0x1f));
+
+          compares--;
+          invertcmp = (compares == 0 && list != backtracks);
+          if (cc[-1] == XCL_NOTPROP)
+            invertcmp ^= 0x1;
+          jump = JUMP(SLJIT_NOT_ZERO ^ invertcmp);
+          add_jump(compiler, compares > 0 ? list : backtracks, jump);
+          }
+        cc += 2;
+        }
+      }
+
+    cc = ccbegin;
+    }
+
   if (unicode_status & (XCLASS_HAS_BIDICO | XCLASS_HAS_BIDICL))
     {
     OP1(SLJIT_MOV_U8, TMP1, 0, SLJIT_MEM1(TMP2), (sljit_sw)PRIV(ucd_records) + SLJIT_OFFSETOF(ucd_record, bidi));
@@ -7879,6 +7924,7 @@ while (*cc != XCL_END)
       break;
 
       case PT_SC:
+      case PT_SCX:
       case PT_BIDICO:
       case PT_BIDICL:
       compares++;
diff --git a/src/pcre2_ucd.c b/src/pcre2_ucd.c
index 96306e7..fe8619b 100644
--- a/src/pcre2_ucd.c
+++ b/src/pcre2_ucd.c
@@ -172,66 +172,66 @@ const uint32_t PRIV(ucd_script_sets)[] = {
  0x00000000u, 0x00000000u, 0x00000000u,
  0x00000002u, 0x00000000u, 0x00000000u,
  0x00000100u, 0x00000000u, 0x00000000u,
- 0x00000000u, 0x00008000u, 0x00000000u,
+ 0x00000000u, 0x00004000u, 0x00000000u,
  0x00000800u, 0x00000000u, 0x00000000u,
  0x00004000u, 0x00000000u, 0x00000000u,
  0x00100000u, 0x00000000u, 0x00000000u,
- 0x00000000u, 0x00000000u, 0x00000004u,
+ 0x00000000u, 0x00000000u, 0x00000001u,
  0x20000000u, 0x00000000u, 0x00000000u,
  0x00000021u, 0x00000000u, 0x00000000u,
- 0x00000001u, 0x00000001u, 0x00000000u,
- 0x00000001u, 0x00000040u, 0x00000000u,
+ 0x00000001u, 0x40000000u, 0x00000000u,
+ 0x00000001u, 0x00000020u, 0x00000000u,
  0x20000001u, 0x00000000u, 0x00000000u,
- 0x00000001u, 0x00000010u, 0x00000000u,
+ 0x00000001u, 0x00000008u, 0x00000000u,
  0x00000102u, 0x00000000u, 0x00000000u,
  0x00004004u, 0x00000000u, 0x00000000u,
- 0x00000008u, 0x00000200u, 0x00000000u,
+ 0x00000008u, 0x00000100u, 0x00000000u,
  0x00400040u, 0x00000000u, 0x00000000u,
  0x00000480u, 0x00000000u, 0x00000000u,
  0x00100080u, 0x00000000u, 0x00000000u,
- 0x00000080u, 0x00800000u, 0x00000000u,
+ 0x00000080u, 0x00400000u, 0x00000000u,
  0x20000080u, 0x00000000u, 0x00000000u,
- 0x00000100u, 0x00010000u, 0x00000000u,
- 0x00000100u, 0x00000000u, 0x00000004u,
- 0x00000100u, 0x00002000u, 0x00000000u,
- 0x00000100u, 0x00000004u, 0x00000000u,
+ 0x00000100u, 0x00008000u, 0x00000000u,
+ 0x00000100u, 0x00000000u, 0x00000001u,
+ 0x00000100u, 0x00001000u, 0x00000000u,
+ 0x00000100u, 0x00000002u, 0x00000000u,
  0x00100200u, 0x00000000u, 0x00000000u,
- 0x00000000u, 0x00010004u, 0x00000000u,
- 0x00001000u, 0x00020000u, 0x00000000u,
- 0x00002000u, 0x04000000u, 0x00000000u,
+ 0x00000000u, 0x00008002u, 0x00000000u,
+ 0x00001000u, 0x00010000u, 0x00000000u,
+ 0x00002000u, 0x02000000u, 0x00000000u,
  0x00104000u, 0x00000000u, 0x00000000u,
  0x000a0000u, 0x00000000u, 0x00000000u,
- 0x00040000u, 0x00000000u, 0x00000004u,
+ 0x00040000u, 0x00000000u, 0x00000001u,
  0x01100000u, 0x00000000u, 0x00000000u,
- 0x00000000u, 0x00200000u, 0x00000020u,
- 0x01000000u, 0x00000080u, 0x00000000u,
- 0x20000001u, 0x00000010u, 0x00000000u,
- 0x00000001u, 0x00000010u, 0x00000008u,
- 0x10000002u, 0x00001000u, 0x00000000u,
- 0x02000000u, 0x00001002u, 0x00000000u,
- 0x00400040u, 0x00000000u, 0x00000010u,
- 0x00400040u, 0x00080000u, 0x00000000u,
- 0x00040100u, 0x00010000u, 0x00000000u,
- 0x00100100u, 0x00010000u, 0x00000000u,
+ 0x00000000u, 0x00100000u, 0x00000008u,
+ 0x01000000u, 0x00000040u, 0x00000000u,
+ 0x20000001u, 0x00000008u, 0x00000000u,
+ 0x00000001u, 0x00000008u, 0x00000002u,
+ 0x10000002u, 0x00000800u, 0x00000000u,
+ 0x02000000u, 0x00000801u, 0x00000000u,
+ 0x00400040u, 0x00000000u, 0x00000004u,
+ 0x00400040u, 0x00040000u, 0x00000000u,
+ 0x00040100u, 0x00008000u, 0x00000000u,
+ 0x00100100u, 0x00008000u, 0x00000000u,
  0x000a4000u, 0x00000000u, 0x00000000u,
- 0x02100000u, 0x00000100u, 0x00000000u,
- 0x00040102u, 0x00010000u, 0x00000000u,
- 0x40010011u, 0x00000000u, 0x00000000u,
- 0x00000100u, 0x20100400u, 0x00000000u,
+ 0x02100000u, 0x00000080u, 0x00000000u,
+ 0x00040102u, 0x00008000u, 0x00000000u,
+ 0xc0010010u, 0x00000000u, 0x00000000u,
+ 0x00000100u, 0x10080200u, 0x00000000u,
  0x000ac004u, 0x00000000u, 0x00000000u,
- 0x20000001u, 0x00000051u, 0x00000008u,
- 0x000ac004u, 0x00000020u, 0x00000000u,
- 0x04840100u, 0x0000000cu, 0x00000000u,
- 0x20000001u, 0x08000051u, 0x00000008u,
- 0x04040102u, 0x02010008u, 0x00000004u,
- 0x20000001u, 0x09200803u, 0x00000020u,
- 0x00003100u, 0x22564400u, 0x00000000u,
- 0x04943102u, 0x0201000cu, 0x00000000u,
- 0x04943102u, 0x0201200cu, 0x00000000u,
- 0x00043100u, 0x22564400u, 0x00000004u,
- 0x00843100u, 0x22564400u, 0x00000004u,
- 0x1c843102u, 0x7215400cu, 0x00000004u,
- 0x1ca43102u, 0x7215400cu, 0x00000004u,
+ 0x20000001u, 0x40000028u, 0x00000002u,
+ 0x000ac004u, 0x00000010u, 0x00000000u,
+ 0x04840100u, 0x00000006u, 0x00000000u,
+ 0x20000001u, 0x44000028u, 0x00000002u,
+ 0x04040102u, 0x01008004u, 0x00000001u,
+ 0x20000001u, 0xc4900400u, 0x00000008u,
+ 0x00003100u, 0x112b2200u, 0x00000000u,
+ 0x04943102u, 0x01008006u, 0x00000000u,
+ 0x04943102u, 0x01009006u, 0x00000000u,
+ 0x00043100u, 0x112b2200u, 0x00000001u,
+ 0x00843100u, 0x112b2200u, 0x00000001u,
+ 0x1c843102u, 0x390aa006u, 0x00000001u,
+ 0x1ca43102u, 0x390aa006u, 0x00000001u,
 };
 
 /* These are the main two-stage UCD tables. The fields in each record are:
diff --git a/testdata/testinput4 b/testdata/testinput4
index 6f424ce..6a2430a 100644
--- a/testdata/testinput4
+++ b/testdata/testinput4
@@ -1133,8 +1133,6 @@
     A\x{300}\x{301}\x{302}BC
     \x{300}
 
-#subject no_jit
-
 /^\p{Han}+/utf
     \x{2e81}\x{3007}\x{2f804}\x{31a0}
 \= Expect no match
@@ -1157,8 +1155,6 @@
     \x{a014}
     \x{a4c6}
 
-#subject -no_jit
-
 /^\p{Any}X/utf
     AXYZ
     \x{1234}XYZ
diff --git a/testdata/testinput5 b/testdata/testinput5
index 6f4948a..33204d6 100644
--- a/testdata/testinput5
+++ b/testdata/testinput5
@@ -1337,8 +1337,6 @@
 
 # These scripts weren't yet in Perl when I added Unicode 6.0.0 to PCRE
 
-#subject no_jit
-
 /^[\p{Batak}]/utf
     \x{1bc0}
     \x{1bff}
@@ -1358,8 +1356,6 @@
     \x{85c}
     \x{85d}
 
-#subject -no_jit
-
 /(\X*)(.)/s,utf
     A\x{300}
 
diff --git a/testdata/testoutput4 b/testdata/testoutput4
index 5fe1bc8..a4d919e 100644
--- a/testdata/testoutput4
+++ b/testdata/testoutput4
@@ -1876,8 +1876,6 @@ No match
     \x{300}
  0: \x{300}
 
-#subject no_jit
-
 /^\p{Han}+/utf
     \x{2e81}\x{3007}\x{2f804}\x{31a0}
  0: \x{2e81}\x{3007}\x{2f804}
@@ -1910,8 +1908,6 @@ No match
     \x{a4c6}
 No match
 
-#subject -no_jit
-
 /^\p{Any}X/utf
     AXYZ
  0: AX
diff --git a/testdata/testoutput5 b/testdata/testoutput5
index 9936db3..ab8a185 100644
--- a/testdata/testoutput5
+++ b/testdata/testoutput5
@@ -2842,8 +2842,6 @@ No match
 
 # These scripts weren't yet in Perl when I added Unicode 6.0.0 to PCRE
 
-#subject no_jit
-
 /^[\p{Batak}]/utf
     \x{1bc0}
  0: \x{1bc0}
@@ -2873,8 +2871,6 @@ No match
     \x{85d}
 No match
 
-#subject -no_jit
-
 /(\X*)(.)/s,utf
     A\x{300}
  0: A