diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index 18d06371321..86d177591b3 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -4285,8 +4285,9 @@ build_apx_evex_prefix (void)
     i.vex.bytes[3] &= ~0x08;
 
   /* Encode the NDD bit of the instruction promoted from the legacy
-     space.  */
-  if (i.vex.register_specifier && i.tm.opcode_space == SPACE_EVEXMAP4)
+     space. ZU shares the same bit with NDD.  */
+  if ((i.vex.register_specifier && i.tm.opcode_space == SPACE_EVEXMAP4)
+      || i.tm.opcode_modifier.zu)
     i.vex.bytes[3] |= 0x10;
 
   /* Encode the NF bit.  */
diff --git a/gas/testsuite/gas/i386/x86-64-apx-zu-intel.d b/gas/testsuite/gas/i386/x86-64-apx-zu-intel.d
new file mode 100644
index 00000000000..9b61d50fd2f
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-apx-zu-intel.d
@@ -0,0 +1,78 @@
+#as:
+#objdump: -dw -Mintel
+#name: x86-64 APX ZU instructions with evex prefix encoding(Intel disassembly)
+#source: x86-64-apx-zu.s
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+\s*[a-f0-9]+:\s*62 f4 7d 18 6b c3 0a[ 	]+imulzu ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 6b 00 0a[ 	]+imulzu ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 ec 7d 18 6b c1 0a[ 	]+imulzu r16w,r17w,0xa
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 6b 38 0a[ 	]+imulzu r31w,WORD PTR \[r16d\],0xa
+\s*[a-f0-9]+:\s*62 4c 7d 18 6b ff 0a[ 	]+imulzu r31w,r31w,0xa
+\s*[a-f0-9]+:\s*62 f4 7d 18 69 c3 82 23[ 	]+imulzu ax,bx,0x2382
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 69 00 82 23[ 	]+imulzu ax,WORD PTR \[eax\],0x2382
+\s*[a-f0-9]+:\s*62 ec 7d 18 69 c1 82 23[ 	]+imulzu r16w,r17w,0x2382
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 69 38 82 23[ 	]+imulzu r31w,WORD PTR \[r16d\],0x2382
+\s*[a-f0-9]+:\s*62 4c 7d 18 69 ff 82 23[ 	]+imulzu r31w,r31w,0x2382
+\s*[a-f0-9]+:\s*62 f4 7d 1c 6b c3 0a[ 	]+\{nf\} imulzu ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 1c 6b 00 0a[ 	]+\{nf\} imulzu ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 f4 7d 0c 6b c3 0a[ 	]+\{nf\} imul ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 0c 6b 00 0a[ 	]+\{nf\} imul ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 f4 7d 08 6b c3 0a[ 	]+\{evex\} imul ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 08 6b 00 0a[ 	]+\{evex\} imul ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 f4 7f 18 41 c0[ 	]+setzuno al
+\s*[a-f0-9]+:\s*62 f4 7f 18 42 c3[ 	]+setzub bl
+\s*[a-f0-9]+:\s*62 d4 7f 18 43 c0[ 	]+setzuae r8b
+\s*[a-f0-9]+:\s*62 d4 7f 18 44 c1[ 	]+setzue r9b
+\s*[a-f0-9]+:\s*62 d4 7f 18 45 c2[ 	]+setzune r10b
+\s*[a-f0-9]+:\s*62 fc 7f 18 46 c0[ 	]+setzube r16b
+\s*[a-f0-9]+:\s*62 fc 7f 18 47 c1[ 	]+setzua r17b
+\s*[a-f0-9]+:\s*62 fc 7f 18 48 c2[ 	]+setzus r18b
+\s*[a-f0-9]+:\s*62 fc 7f 18 49 c3[ 	]+setzuns r19b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4a c4[ 	]+setzup r20b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4b c5[ 	]+setzunp r21b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4c c6[ 	]+setzul r22b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4d c7[ 	]+setzuge r23b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4e c0[ 	]+setzule r24b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4f c1[ 	]+setzug r25b
+\s*[a-f0-9]+:\s*d5 91 9f c1[ 	]+setg   r25b
+\s*[a-f0-9]+:\s*62 f4 7f 08 4f c0[ 	]+\{evex\} setg al
+\s*[a-f0-9]+:\s*62 f4 7d 18 6b c3 0a[ 	]+imulzu ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 6b 00 0a[ 	]+imulzu ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 ec 7d 18 6b c1 0a[ 	]+imulzu r16w,r17w,0xa
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 6b 38 0a[ 	]+imulzu r31w,WORD PTR \[r16d\],0xa
+\s*[a-f0-9]+:\s*62 4c 7d 18 6b ff 0a[ 	]+imulzu r31w,r31w,0xa
+\s*[a-f0-9]+:\s*62 f4 7d 18 69 c3 82 23[ 	]+imulzu ax,bx,0x2382
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 69 00 82 23[ 	]+imulzu ax,WORD PTR \[eax\],0x2382
+\s*[a-f0-9]+:\s*62 ec 7d 18 69 c1 82 23[ 	]+imulzu r16w,r17w,0x2382
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 69 38 82 23[ 	]+imulzu r31w,WORD PTR \[r16d\],0x2382
+\s*[a-f0-9]+:\s*62 4c 7d 18 69 ff 82 23[ 	]+imulzu r31w,r31w,0x2382
+\s*[a-f0-9]+:\s*62 f4 7d 1c 6b c3 0a[ 	]+\{nf\} imulzu ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 1c 6b 00 0a[ 	]+\{nf\} imulzu ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 f4 7d 0c 6b c3 0a[ 	]+\{nf\} imul ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 0c 6b 00 0a[ 	]+\{nf\} imul ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 f4 7d 08 6b c3 0a[ 	]+\{evex\} imul ax,bx,0xa
+\s*[a-f0-9]+:\s*67 62 f4 7d 08 6b 00 0a[ 	]+\{evex\} imul ax,WORD PTR \[eax\],0xa
+\s*[a-f0-9]+:\s*62 f4 7f 18 41 c0[ 	]+setzuno al
+\s*[a-f0-9]+:\s*62 f4 7f 18 42 c3[ 	]+setzub bl
+\s*[a-f0-9]+:\s*62 d4 7f 18 43 c0[ 	]+setzuae r8b
+\s*[a-f0-9]+:\s*62 d4 7f 18 44 c1[ 	]+setzue r9b
+\s*[a-f0-9]+:\s*62 d4 7f 18 45 c2[ 	]+setzune r10b
+\s*[a-f0-9]+:\s*62 fc 7f 18 46 c0[ 	]+setzube r16b
+\s*[a-f0-9]+:\s*62 fc 7f 18 47 c1[ 	]+setzua r17b
+\s*[a-f0-9]+:\s*62 fc 7f 18 48 c2[ 	]+setzus r18b
+\s*[a-f0-9]+:\s*62 fc 7f 18 49 c3[ 	]+setzuns r19b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4a c4[ 	]+setzup r20b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4b c5[ 	]+setzunp r21b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4c c6[ 	]+setzul r22b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4d c7[ 	]+setzuge r23b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4e c0[ 	]+setzule r24b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4f c1[ 	]+setzug r25b
+\s*[a-f0-9]+:\s*d5 91 9f c1[ 	]+setg   r25b
+\s*[a-f0-9]+:\s*62 f4 7f 08 4f c0[ 	]+\{evex\} setg al
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-apx-zu-inval.l b/gas/testsuite/gas/i386/x86-64-apx-zu-inval.l
new file mode 100644
index 00000000000..978acc1e3e9
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-apx-zu-inval.l
@@ -0,0 +1,25 @@
+.* Assembler messages:
+.*:6: Error: invalid instruction suffix for `imulzu'
+.*:7: Error: no such instruction: `imulzud \$0xa,%ebx,%eax'
+.*:8: Error: operand size mismatch for `imulzu'
+.*:9: Error: invalid instruction suffix for `imulzu'
+.*:10: Error: no such instruction: `imulzud \$0xaaaa,%ebx,%eax'
+.*:11: Error: operand size mismatch for `imulzu'
+.*:12: Error: operand size mismatch for `imulzu'
+.*:13: Error: operand size mismatch for `imulzu'
+.*:14: Error: can't encode register 'ah' in an  EVEX/VEX prefix instruction
+.*:15: Error: operand size mismatch for `setzub'
+.*:16: Error: operand size mismatch for `setzuae'
+.*:17: Error: operand size mismatch for `setzue'
+.*:18: Error: operand size mismatch for `setzune'
+.*:19: Error: operand size mismatch for `setzube'
+.*:20: Error: operand size mismatch for `setzua'
+.*:21: Error: operand size mismatch for `setzus'
+.*:22: Error: operand size mismatch for `setzuns'
+.*:23: Error: operand size mismatch for `setzup'
+.*:24: Error: operand size mismatch for `setzunp'
+.*:25: Error: operand size mismatch for `setzul'
+.*:26: Error: operand size mismatch for `setzuge'
+.*:27: Error: operand size mismatch for `setzule'
+.*:28: Error: operand size mismatch for `setzug'
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-apx-zu-inval.s b/gas/testsuite/gas/i386/x86-64-apx-zu-inval.s
new file mode 100644
index 00000000000..bd81b41ff3f
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-apx-zu-inval.s
@@ -0,0 +1,28 @@
+# Check illegal APX-ZU instructions
+
+	.allow_index_reg
+	.text
+_start:
+	imulzub $0xa,%bl,%al
+	imulzud $0xa,%ebx,%eax
+	imulzu $0xa,%rbx,%rax
+	imulzub $0xaaaa,%bl,%al
+	imulzud $0xaaaa,%ebx,%eax
+	imulzu $0xaaaa,%rbx,%rax
+	imulzu $0xaaaa,%ebx,%rax
+	imulzu $0xaaaa,%ebx,%rax
+	setzuno  %ah
+	setzub   %bx
+	setzuae  %r8w
+	setzue   %r9
+	setzune  %r10d
+	setzube  %eax
+	setzua   %ebx
+	setzus   %r18w
+	setzuns  %r19w
+	setzup   %r20d
+	setzunp  %r21w
+	setzul   %r22w
+	setzuge  %r23d
+	setzule  %r24w
+	setzug   %r25w
diff --git a/gas/testsuite/gas/i386/x86-64-apx-zu.d b/gas/testsuite/gas/i386/x86-64-apx-zu.d
new file mode 100644
index 00000000000..c6b0cc45d76
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-apx-zu.d
@@ -0,0 +1,78 @@
+#as:
+#objdump: -dw
+#name: x86-64 APX ZU instructions with evex prefix encoding
+#source: x86-64-apx-zu.s
+
+.*: +file format .*
+
+
+Disassembly of section .text:
+
+0+ <_start>:
+\s*[a-f0-9]+:\s*62 f4 7d 18 6b c3 0a[ 	]+imulzu \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 6b 00 0a[ 	]+imulzu \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 ec 7d 18 6b c1 0a[ 	]+imulzu \$0xa,%r17w,%r16w
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 6b 38 0a[ 	]+imulzu \$0xa,\(%r16d\),%r31w
+\s*[a-f0-9]+:\s*62 4c 7d 18 6b ff 0a[ 	]+imulzu \$0xa,%r31w,%r31w
+\s*[a-f0-9]+:\s*62 f4 7d 18 69 c3 82 23[ 	]+imulzu \$0x2382,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 69 00 82 23[ 	]+imulzu \$0x2382,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 ec 7d 18 69 c1 82 23[ 	]+imulzu \$0x2382,%r17w,%r16w
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 69 38 82 23[ 	]+imulzu \$0x2382,\(%r16d\),%r31w
+\s*[a-f0-9]+:\s*62 4c 7d 18 69 ff 82 23[ 	]+imulzu \$0x2382,%r31w,%r31w
+\s*[a-f0-9]+:\s*62 f4 7d 1c 6b c3 0a[ 	]+\{nf\} imulzu \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 1c 6b 00 0a[ 	]+\{nf\} imulzu \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 f4 7d 0c 6b c3 0a[ 	]+\{nf\} imul \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 0c 6b 00 0a[ 	]+\{nf\} imul \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 f4 7d 08 6b c3 0a[ 	]+\{evex\} imul \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 08 6b 00 0a[ 	]+\{evex\} imul \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 f4 7f 18 41 c0[ 	]+setzuno %al
+\s*[a-f0-9]+:\s*62 f4 7f 18 42 c3[ 	]+setzub %bl
+\s*[a-f0-9]+:\s*62 d4 7f 18 43 c0[ 	]+setzuae %r8b
+\s*[a-f0-9]+:\s*62 d4 7f 18 44 c1[ 	]+setzue %r9b
+\s*[a-f0-9]+:\s*62 d4 7f 18 45 c2[ 	]+setzune %r10b
+\s*[a-f0-9]+:\s*62 fc 7f 18 46 c0[ 	]+setzube %r16b
+\s*[a-f0-9]+:\s*62 fc 7f 18 47 c1[ 	]+setzua %r17b
+\s*[a-f0-9]+:\s*62 fc 7f 18 48 c2[ 	]+setzus %r18b
+\s*[a-f0-9]+:\s*62 fc 7f 18 49 c3[ 	]+setzuns %r19b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4a c4[ 	]+setzup %r20b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4b c5[ 	]+setzunp %r21b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4c c6[ 	]+setzul %r22b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4d c7[ 	]+setzuge %r23b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4e c0[ 	]+setzule %r24b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4f c1[ 	]+setzug %r25b
+\s*[a-f0-9]+:\s*d5 91 9f c1[ 	]+setg   %r25b
+\s*[a-f0-9]+:\s*62 f4 7f 08 4f c0[ 	]+\{evex\} setg %al
+\s*[a-f0-9]+:\s*62 f4 7d 18 6b c3 0a[ 	]+imulzu \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 6b 00 0a[ 	]+imulzu \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 ec 7d 18 6b c1 0a[ 	]+imulzu \$0xa,%r17w,%r16w
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 6b 38 0a[ 	]+imulzu \$0xa,\(%r16d\),%r31w
+\s*[a-f0-9]+:\s*62 4c 7d 18 6b ff 0a[ 	]+imulzu \$0xa,%r31w,%r31w
+\s*[a-f0-9]+:\s*62 f4 7d 18 69 c3 82 23[ 	]+imulzu \$0x2382,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 18 69 00 82 23[ 	]+imulzu \$0x2382,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 ec 7d 18 69 c1 82 23[ 	]+imulzu \$0x2382,%r17w,%r16w
+\s*[a-f0-9]+:\s*67 62 6c 7d 18 69 38 82 23[ 	]+imulzu \$0x2382,\(%r16d\),%r31w
+\s*[a-f0-9]+:\s*62 4c 7d 18 69 ff 82 23[ 	]+imulzu \$0x2382,%r31w,%r31w
+\s*[a-f0-9]+:\s*62 f4 7d 1c 6b c3 0a[ 	]+\{nf\} imulzu \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 1c 6b 00 0a[ 	]+\{nf\} imulzu \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 f4 7d 0c 6b c3 0a[ 	]+\{nf\} imul \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 0c 6b 00 0a[  	]+\{nf\} imul \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 f4 7d 08 6b c3 0a[ 	]+\{evex\} imul \$0xa,%bx,%ax
+\s*[a-f0-9]+:\s*67 62 f4 7d 08 6b 00 0a[ 	]+\{evex\} imul \$0xa,\(%eax\),%ax
+\s*[a-f0-9]+:\s*62 f4 7f 18 41 c0[ 	]+setzuno %al
+\s*[a-f0-9]+:\s*62 f4 7f 18 42 c3[ 	]+setzub %bl
+\s*[a-f0-9]+:\s*62 d4 7f 18 43 c0[ 	]+setzuae %r8b
+\s*[a-f0-9]+:\s*62 d4 7f 18 44 c1[ 	]+setzue %r9b
+\s*[a-f0-9]+:\s*62 d4 7f 18 45 c2[ 	]+setzune %r10b
+\s*[a-f0-9]+:\s*62 fc 7f 18 46 c0[ 	]+setzube %r16b
+\s*[a-f0-9]+:\s*62 fc 7f 18 47 c1[ 	]+setzua %r17b
+\s*[a-f0-9]+:\s*62 fc 7f 18 48 c2[ 	]+setzus %r18b
+\s*[a-f0-9]+:\s*62 fc 7f 18 49 c3[ 	]+setzuns %r19b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4a c4[ 	]+setzup %r20b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4b c5[ 	]+setzunp %r21b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4c c6[ 	]+setzul %r22b
+\s*[a-f0-9]+:\s*62 fc 7f 18 4d c7[ 	]+setzuge %r23b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4e c0[ 	]+setzule %r24b
+\s*[a-f0-9]+:\s*62 dc 7f 18 4f c1[ 	]+setzug %r25b
+\s*[a-f0-9]+:\s*d5 91 9f c1[ 	]+setg   %r25b
+\s*[a-f0-9]+:\s*62 f4 7f 08 4f c0[ 	]+\{evex\} setg %al
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-apx-zu.s b/gas/testsuite/gas/i386/x86-64-apx-zu.s
new file mode 100644
index 00000000000..0c287b8aa89
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-apx-zu.s
@@ -0,0 +1,73 @@
+# Check 64bit APX ZU instructions with evex prefix encoding
+
+	.allow_index_reg
+	.text
+_start:
+	imulzu $10, %bx, %ax
+	imulzu $10, (%eax), %ax
+	imulzu $10, %r17w, %r16w
+	imulzu $10, (%r16d), %r31w
+	imulzu $10, %r31w
+	imulzu $9090, %bx, %ax
+	imulzu $9090, (%eax), %ax
+	imulzu $9090, %r17w, %r16w
+	imulzu $9090, (%r16d), %r31w
+	imulzu $9090, %r31w
+	{nf}   imulzu $10, %bx, %ax
+	{nf}   imulzu $10, (%eax), %ax
+	{nf}   imul $10, %bx, %ax       # ZU=0
+	{nf}   imul $10, (%eax), %ax    # ZU=0
+	{evex} imul $10, %bx, %ax       # ZU=0
+	{evex} imul $10, (%eax), %ax    # ZU=0
+	setzuno  %al
+	setzub   %bl
+	setzuae  %r8b
+	setzue   %r9b
+	setzune  %r10b
+	setzube  %r16b
+	setzua   %r17b
+	setzus   %r18b
+	setzuns  %r19b
+	setzup   %r20b
+	setzunp  %r21b
+	setzul   %r22b
+	setzuge  %r23b
+	setzule  %r24b
+	setzug   %r25b
+	setg     %r25b
+	{evex} setg  %al
+
+	.intel_syntax noprefix
+	imulzu ax,bx, 10
+	imulzu ax,WORD PTR [eax],10
+	imulzu r16w,r17w,10
+	imulzu r31w,WORD PTR [r16d],10
+	imulzu r31w,r31w,10
+	imulzu ax,bx,9090
+	imulzu ax,WORD PTR [eax],9090
+	imulzu r16w,r17w,9090
+	imulzu r31w,WORD PTR [r16d],9090
+	imulzu r31w,r31w,9090
+	{nf} imulzu ax,bx, 10
+	{nf} imulzu ax,WORD PTR [eax],10
+	{nf} imul ax,bx, 10               # ZU=0
+	{nf} imul ax,WORD PTR [eax],10    # ZU=0
+	{evex} imul ax,bx, 10             # ZU=0
+	{evex} imul ax,WORD PTR [eax],10  # ZU=0
+	setzuno  al
+	setzub   bl
+	setzuae  r8b
+	setzue   r9b
+	setzune  r10b
+	setzube  r16b
+	setzua   r17b
+	setzus   r18b
+	setzuns  r19b
+	setzup   r20b
+	setzunp  r21b
+	setzul   r22b
+	setzuge  r23b
+	setzule  r24b
+	setzug   r25b
+	setg     r25b
+	{evex} setg  al
diff --git a/gas/testsuite/gas/i386/x86-64.exp b/gas/testsuite/gas/i386/x86-64.exp
index a50865f6b21..ef1ad2dfe8a 100644
--- a/gas/testsuite/gas/i386/x86-64.exp
+++ b/gas/testsuite/gas/i386/x86-64.exp
@@ -389,6 +389,9 @@ run_dump_test "x86-64-apx-jmpabs-intel"
 run_dump_test "x86-64-apx-jmpabs-inval"
 run_dump_test "x86-64-apx-nf"
 run_dump_test "x86-64-apx-nf-intel"
+run_dump_test "x86-64-apx-zu"
+run_dump_test "x86-64-apx-zu-intel"
+run_list_test "x86-64-apx-zu-inval"
 run_dump_test "x86-64-apx_f-evex"
 run_dump_test "sse2avx-apx"
 run_dump_test "sse2avx-evex"
diff --git a/opcodes/i386-dis-evex-prefix.h b/opcodes/i386-dis-evex-prefix.h
index 5e6423790b5..947fd868dd6 100644
--- a/opcodes/i386-dis-evex-prefix.h
+++ b/opcodes/i386-dis-evex-prefix.h
@@ -338,6 +338,118 @@
     { "vcmpp%XH", { MaskG, Vex, EXxh, EXxEVexS, CMP }, 0 },
     { "vcmps%XH", { MaskG, VexScalar, EXw, EXxEVexS, CMP }, 0 },
   },
+  /* PREFIX_EVEX_MAP4_40 */
+  {
+    { "%CFcmovoS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovoS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUo",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_41 */
+  {
+    { "%CFcmovnoS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovnoS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUno",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_42 */
+  {
+    { "%CFcmovbS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovbS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUb",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_43 */
+  {
+    { "%CFcmovaeS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovaeS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUae",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_44 */
+  {
+    { "%CFcmoveS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmoveS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUe",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_45 */
+  {
+    { "%CFcmovneS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovneS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUne",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_46 */
+  {
+    { "%CFcmovbeS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovbeS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUbe",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_47 */
+  {
+    { "%CFcmovaS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovaS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUa",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_48 */
+  {
+    { "%CFcmovsS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovsS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUs",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_49 */
+  {
+    { "%CFcmovnsS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovnsS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUns",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_4A */
+  {
+    { "%CFcmovpS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovpS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUp",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_4B */
+  {
+    { "%CFcmovnpS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovnpS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUnp",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_4C */
+  {
+    { "%CFcmovlS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovlS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUl",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_4D */
+  {
+    { "%CFcmovgeS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovgeS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUge",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_4E */
+  {
+    { "%CFcmovleS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovleS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUle",	{ Eb }, 0 },
+  },
+  /* PREFIX_EVEX_MAP4_4F */
+  {
+    { "%CFcmovgS",	{ VexGv, Gv, Ev }, 0 },
+    { Bad_Opcode },
+    { "%CFcmovgS",	{ VexGv, Gv, Ev }, 0 },
+    { "set%ZUg",	{ Eb }, 0 },
+  },
   /* PREFIX_EVEX_MAP4_F0 */
   {
     { "crc32A", { Gdq, Eb }, 0 },
diff --git a/opcodes/i386-dis-evex.h b/opcodes/i386-dis-evex.h
index b158f2b0b89..ebb3cc20aea 100644
--- a/opcodes/i386-dis-evex.h
+++ b/opcodes/i386-dis-evex.h
@@ -947,23 +947,23 @@ static const struct dis386 evex_table[][256] = {
     { Bad_Opcode },
     { Bad_Opcode },
     /* 40 */
-    { "%CFcmovoS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovnoS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovbS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovaeS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmoveS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovneS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovbeS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovaS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_40) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_41) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_42) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_43) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_44) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_45) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_46) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_47) },
     /* 48 */
-    { "%CFcmovsS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovnsS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovpS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovnpS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovlS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovgeS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovleS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
-    { "%CFcmovgS",	{ VexGv, Gv, Ev }, PREFIX_NP_OR_DATA },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_48) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_49) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_4A) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_4B) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_4C) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_4D) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_4E) },
+    { PREFIX_TABLE (PREFIX_EVEX_MAP4_4F) },
     /* 50 */
     { Bad_Opcode },
     { Bad_Opcode },
@@ -993,9 +993,9 @@ static const struct dis386 evex_table[][256] = {
     { Bad_Opcode },
     /* 68 */
     { Bad_Opcode },
-    { "%NFimulS",	{ Gv, Ev, Iv }, PREFIX_NP_OR_DATA },
+    { "%NFimul%ZUS",	{ Gv, Ev, Iv }, PREFIX_NP_OR_DATA },
     { Bad_Opcode },
-    { "%NFimulS",	{ Gv, Ev, sIb }, PREFIX_NP_OR_DATA },
+    { "%NFimul%ZUS",	{ Gv, Ev, sIb }, PREFIX_NP_OR_DATA },
     { Bad_Opcode },
     { Bad_Opcode },
     { Bad_Opcode },
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index 53f2d6cf6d8..fad9188b259 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -1199,6 +1199,22 @@ enum
   PREFIX_EVEX_0F3A67,
   PREFIX_EVEX_0F3AC2,
 
+  PREFIX_EVEX_MAP4_40,
+  PREFIX_EVEX_MAP4_41,
+  PREFIX_EVEX_MAP4_42,
+  PREFIX_EVEX_MAP4_43,
+  PREFIX_EVEX_MAP4_44,
+  PREFIX_EVEX_MAP4_45,
+  PREFIX_EVEX_MAP4_46,
+  PREFIX_EVEX_MAP4_47,
+  PREFIX_EVEX_MAP4_48,
+  PREFIX_EVEX_MAP4_49,
+  PREFIX_EVEX_MAP4_4A,
+  PREFIX_EVEX_MAP4_4B,
+  PREFIX_EVEX_MAP4_4C,
+  PREFIX_EVEX_MAP4_4D,
+  PREFIX_EVEX_MAP4_4E,
+  PREFIX_EVEX_MAP4_4F,
   PREFIX_EVEX_MAP4_F0,
   PREFIX_EVEX_MAP4_F1,
   PREFIX_EVEX_MAP4_F2,
@@ -1816,6 +1832,7 @@ struct dis386 {
 	   instruction.
    "NF" => print "{nf} " pseudo prefix when EVEX.NF = 1 and print "{evex} "
 	   pseudo prefix when instructions without NF, EGPR and VVVV,
+   "ZU" => print 'zu' if EVEX.ZU=1.
    "YK" keep unused, to avoid ambiguity with the combined use of Y and K.
    "YX" keep unused, to avoid ambiguity with the combined use of Y and X.
    "LQ" => print 'l' ('d' in Intel mode) or 'q' for memory operand, cond
@@ -10877,6 +10894,24 @@ putop (instr_info *ins, const char *in_template, int sizeflag)
 	      abort ();
 	    }
 	  break;
+	case 'U':
+	  if (l == 1 && (last[0] == 'Z'))
+	    {
+	      /* Although IMUL/SETcc does not support NDD, the EVEX.ND bit is
+		 used to control whether its destination register has its upper
+		 bits zeroed when OSIZE is 16b/8b.  */
+	      if (ins->vex.nd)
+		{
+		  oappend (ins, "zu");
+		  /* When we print zu for the EVEX instruction, we no longer
+		     need prefix {evex}. */
+		  if (evex_printed == true && startswith (ins->obufp, "{evex}"))
+		    ins->obufp += 6;
+		}
+	    }
+	  else
+	    abort ();
+	  break;
 	case 'V':
 	  if (l == 0)
 	    {
diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c
index 35e2f27df3b..fb4e78df3a2 100644
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -491,6 +491,7 @@ static bitfield opcode_modifiers[] =
   BITFIELD (NoEgpr),
   BITFIELD (NF),
   BITFIELD (Rex2),
+  BITFIELD (ZU),
 };
 
 #define CLASS(n) #n, n
diff --git a/opcodes/i386-opc.h b/opcodes/i386-opc.h
index fa482ca3d37..b63ad7c13f5 100644
--- a/opcodes/i386-opc.h
+++ b/opcodes/i386-opc.h
@@ -754,6 +754,9 @@ enum
   /* Instrucion requires REX2 prefix.  */
   Rex2,
 
+  /* Support zero upper */
+  ZU,
+
   /* The last bitfield in i386_opcode_modifier.  */
   Opcode_Modifier_Num
 };
@@ -801,6 +804,7 @@ typedef struct i386_opcode_modifier
   unsigned int noegpr:1;
   unsigned int nf:1;
   unsigned int rex2:1;
+  unsigned int zu:1;
 } i386_opcode_modifier;
 
 /* Operand classes.  */
diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl
index 0bcda7ea8e1..faaa92c8d11 100644
--- a/opcodes/i386-opc.tbl
+++ b/opcodes/i386-opc.tbl
@@ -400,15 +400,19 @@ imul, 0xfaf, i386, Modrm|CheckOperandSize|No_bSuf|No_sSuf, { Reg16|Reg32|Reg64|U
 imul, 0xaf, APX_F, Modrm|CheckOperandSize|No_bSuf|No_sSuf|EVexMap4|NF, { Reg16|Reg32|Reg64|Unspecified|BaseIndex, Reg16|Reg32|Reg64 }
 imul, 0x6b, i186, Modrm|CheckOperandSize|No_bSuf|No_sSuf, { Imm8S, Reg16|Reg32|Reg64|Unspecified|BaseIndex, Reg16|Reg32|Reg64 }
 imul, 0x6b, APX_F, Modrm|CheckOperandSize|No_bSuf|No_sSuf|EVexMap4|NF, { Imm8S, Reg16|Reg32|Reg64|Unspecified|BaseIndex, Reg16|Reg32|Reg64 }
+imulzu, 0x6b, APX_F, Modrm|No_bSuf|No_sSuf|EVexMap4|NF|ZU, { Imm8S, Reg16|Unspecified|BaseIndex, Reg16 }
 imul, 0x69, i186, Modrm|CheckOperandSize|No_bSuf|No_sSuf, { Imm16|Imm32|Imm32S, Reg16|Reg32|Reg64|Unspecified|BaseIndex, Reg16|Reg32|Reg64 }
 imul, 0x69, APX_F, Modrm|CheckOperandSize|No_bSuf|No_sSuf|EVexMap4|NF, { Imm16|Imm32|Imm32S, Reg16|Reg32|Reg64|Unspecified|BaseIndex, Reg16|Reg32|Reg64 }
+imulzu, 0x69, APX_F, Modrm|No_bSuf|No_sSuf|EVexMap4|NF|ZU, { Imm16, Reg16|Unspecified|BaseIndex, Reg16 }
 // imul with 2 operands mimics imul with 3 by putting the register in
 // both i.rm.reg & i.rm.regmem fields.  RegKludge enables this
 // transformation.
 imul, 0x6b, i186, Modrm|No_bSuf|No_sSuf|RegKludge, { Imm8S, Reg16|Reg32|Reg64 }
 imul, 0x6b, APX_F, Modrm|No_bSuf|No_sSuf|RegKludge|EVexMap4|NF, { Imm8S, Reg16|Reg32|Reg64 }
+imulzu, 0x6b, APX_F, Modrm|No_bSuf|No_sSuf|RegKludge|EVexMap4|NF|ZU, { Imm8S, Reg16 }
 imul, 0x69, i186, Modrm|No_bSuf|No_sSuf|RegKludge, { Imm16|Imm32|Imm32S, Reg16|Reg32|Reg64 }
 imul, 0x69, APX_F, Modrm|No_bSuf|No_sSuf|RegKludge|EVexMap4|NF, { Imm16|Imm32|Imm32S, Reg16|Reg32|Reg64 }
+imulzu, 0x69, APX_F, Modrm|No_bSuf|No_sSuf|RegKludge|EVexMap4|NF|ZU, { Imm16, Reg16 }
 
 <mul>
 
@@ -529,6 +533,8 @@ loopne, 0xe0, x64, JumpByte|No_bSuf|No_wSuf|No_sSuf|NoRex64, { Disp8 }
 
 // Set byte on flag instructions.
 set<cc>, 0xf9<cc:opc>/0, i386, Modrm|No_wSuf|No_lSuf|No_sSuf|No_qSuf, { Reg8|Unspecified|BaseIndex }
+set<cc>, 0xf24<cc:opc>/0, APX_F, Modrm|No_wSuf|No_lSuf|No_sSuf|No_qSuf|VexWIG|EVexMap4, { Reg8 }
+setzu<cc>, 0xf24<cc:opc>/0, APX_F, Modrm|No_wSuf|No_lSuf|No_sSuf|No_qSuf|VexWIG|EVexMap4|ZU, { Reg8 }
 
 // String manipulation.
 cmps, 0xa6, 0, W|No_sSuf|RepPrefixOk, {}
