feat(arch): the SVE predicate family in the extended layer

Assisted-by: GLM 5.3 Flash

asm/extension_test.go

@@ -205,12 +205,28 @@ func TestExtensionArchIsolation(t *testing.T) {
 // TestExtensionNamesARM64 checks the completion-facing name list: every
 // distinct mnemonic of the family, first-occurrence order, no duplicates.
 func TestExtensionNamesARM64(t *testing.T) {
-	want := []string{"ADD", "SUB", "SQADD", "UQADD", "SQSUB", "UQSUB", "MUL", "SMULH", "UMULH", "SUBR"}
+	want := []string{
+		// The SVE integer add/subtract/multiply family.
+		"ADD", "SUB", "SQADD", "UQADD", "SQSUB", "UQSUB", "MUL", "SMULH", "UMULH", "SUBR",
+		// The SVE and SVE2.1 predicate family: the logical operations, the
+		// breaks, the permutations, the singles, the first-fault group and
+		// the while compares.
+		"PAND", "PANDS", "PBIC", "PBICS", "PEOR", "PEORS",
+		"PNAND", "PNANDS", "PNOR", "PNORS", "PORN", "PORNS", "PORR", "PORRS",
+		"PSEL",
+		"PBRKA", "PBRKAS", "PBRKB", "PBRKBS", "PBRKN", "PBRKNS",
+		"PBRKPA", "PBRKPAS", "PBRKPB", "PBRKPBS",
+		"PTRN1", "PTRN2", "PUZP1", "PUZP2", "PZIP1", "PZIP2",
+		"PPFALSE", "PPFIRST", "PPNEXT", "PPTEST", "PPTRUE", "PPUNPKHI", "PPUNPKLO",
+		"PRDFFR", "PRDFFRS", "PWRFFR", "PREV", "SETFFR",
+		"PWHILEGE", "PWHILEGT", "PWHILEHI", "PWHILEHS",
+		"PWHILELE", "PWHILELO", "PWHILELS", "PWHILELT", "PWHILERW", "PWHILEWR",
+	}
 	got := ExtensionNames(arch.ARM64)
 	if strings.Join(got, ",") != strings.Join(want, ",") {
 		t.Errorf("ExtensionNames(ARM64) = %v, want %v", got, want)
 	}
-	if n := len(arch.Extensions(arch.ARM64)); n != 23 {
-		t.Errorf("the family registers %d instructions, want 23", n)
+	if n := len(arch.Extensions(arch.ARM64)); n != 77 {
+		t.Errorf("the family registers %d instructions, want 77", n)
 	}
 }