diff --git a/gas/NEWS b/gas/NEWS
index f95383e83af..42a2005d7c9 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,5 +1,7 @@
 -*- text -*-
 
+* Add support for Intel AMX-COMPLEX instructions.
+
 * Add SME2 support to the AArch64 port.
 
 * A new .insn directive is recognized by x86 gas.
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c
index ea2ed0d818e..ea5705da4af 100644
--- a/gas/config/tc-i386.c
+++ b/gas/config/tc-i386.c
@@ -1113,6 +1113,7 @@ static const arch_entry cpu_arch[] =
   SUBARCH (amx_int8, AMX_INT8, ANY_AMX_INT8, false),
   SUBARCH (amx_bf16, AMX_BF16, ANY_AMX_BF16, false),
   SUBARCH (amx_fp16, AMX_FP16, ANY_AMX_FP16, false),
+  SUBARCH (amx_complex, AMX_COMPLEX, ANY_AMX_COMPLEX, false),
   SUBARCH (amx_tile, AMX_TILE, ANY_AMX_TILE, false),
   SUBARCH (movdiri, MOVDIRI, MOVDIRI, false),
   SUBARCH (movdir64b, MOVDIR64B, MOVDIR64B, false),
diff --git a/gas/doc/c-i386.texi b/gas/doc/c-i386.texi
index 617cbd46cb7..15d060b2a33 100644
--- a/gas/doc/c-i386.texi
+++ b/gas/doc/c-i386.texi
@@ -208,6 +208,7 @@ accept various extension mnemonics.  For example,
 @code{amx_int8},
 @code{amx_bf16},
 @code{amx_fp16},
+@code{amx_complex},
 @code{amx_tile},
 @code{vmx},
 @code{vmfunc},
@@ -1636,7 +1637,8 @@ supported on the CPU specified.  The choices for @var{cpu_type} are:
 @item @samp{.wbnoinvd} @tab @samp{.pconfig} @tab @samp{.waitpkg} @tab @samp{.cldemote}
 @item @samp{.shstk} @tab @samp{.gfni} @tab @samp{.vaes} @tab @samp{.vpclmulqdq}
 @item @samp{.movdiri} @tab @samp{.movdir64b} @tab @samp{.enqcmd} @tab @samp{.tsxldtrk}
-@item @samp{.amx_int8} @tab @samp{.amx_bf16} @tab @samp{.amx_fp16} @tab @samp{.amx_tile}
+@item @samp{.amx_int8} @tab @samp{.amx_bf16} @tab @samp{.amx_fp16}
+@item @samp{.amx_complex} @tab @samp{.amx_tile}
 @item @samp{.kl} @tab @samp{.widekl} @tab @samp{.uintr} @tab @samp{.hreset}
 @item @samp{.3dnow} @tab @samp{.3dnowa} @tab @samp{.sse4a} @tab @samp{.sse5}
 @item @samp{.syscall} @tab @samp{.rdtscp} @tab @samp{.svme}
diff --git a/gas/testsuite/gas/i386/amx-complex-inval.l b/gas/testsuite/gas/i386/amx-complex-inval.l
new file mode 100644
index 00000000000..df6713c5d8b
--- /dev/null
+++ b/gas/testsuite/gas/i386/amx-complex-inval.l
@@ -0,0 +1,3 @@
+.* Assembler messages:
+.*:6: Error: `tcmmimfp16ps' is only supported in 64-bit mode
+.*:7: Error: `tcmmrlfp16ps' is only supported in 64-bit mode
diff --git a/gas/testsuite/gas/i386/amx-complex-inval.s b/gas/testsuite/gas/i386/amx-complex-inval.s
new file mode 100644
index 00000000000..b1bbf32585b
--- /dev/null
+++ b/gas/testsuite/gas/i386/amx-complex-inval.s
@@ -0,0 +1,7 @@
+# Check Illegal AMX-COMPLEX instructions
+
+	.allow_index_reg
+	.text
+_start:
+	tcmmimfp16ps	%tmm1, %tmm2, %tmm3
+	tcmmrlfp16ps	%tmm1, %tmm2, %tmm3
diff --git a/gas/testsuite/gas/i386/i386.exp b/gas/testsuite/gas/i386/i386.exp
index c44f071a0e2..6d326b49a39 100644
--- a/gas/testsuite/gas/i386/i386.exp
+++ b/gas/testsuite/gas/i386/i386.exp
@@ -493,6 +493,7 @@ if [gas_32_check] then {
     run_dump_test "avx-ne-convert-intel"
     run_dump_test "raoint"
     run_dump_test "raoint-intel"
+    run_list_test "amx-complex-inval"
     run_list_test "sg"
     run_dump_test "clzero"
     run_dump_test "invlpgb"
@@ -1183,6 +1184,9 @@ if [gas_64_check] then {
     run_dump_test "x86-64-avx-ne-convert-intel"
     run_dump_test "x86-64-raoint"
     run_dump_test "x86-64-raoint-intel"
+    run_dump_test "x86-64-amx-complex"
+    run_dump_test "x86-64-amx-complex-intel"
+    run_dump_test "x86-64-amx-complex-bad"
     run_dump_test "x86-64-clzero"
     run_dump_test "x86-64-mwaitx-bdver4"
     run_list_test "x86-64-mwaitx-reg"
diff --git a/gas/testsuite/gas/i386/x86-64-amx-complex-bad.d b/gas/testsuite/gas/i386/x86-64-amx-complex-bad.d
new file mode 100644
index 00000000000..646015ca9bb
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-amx-complex-bad.d
@@ -0,0 +1,19 @@
+#as:
+#objdump: -drw
+#name: x86_64 Illegal AMX-COMPLEX insns
+#source: x86-64-amx-complex-bad.s
+
+.*: +file format .*
+
+
+Disassembly of section \.text:
+
+0+ <\.text>:
+[ 	]*[a-f0-9]+:[ 	]*c4 e2 d9 6c[ 	]*\(bad\)[ 	]*
+[ 	]*[a-f0-9]+:[ 	]*f5[ 	]*cmc.*
+[ 	]*[a-f0-9]+:[ 	]*c4 e2 5d 6c[ 	]*\(bad\)[ 	]*
+[ 	]*[a-f0-9]+:[ 	]*f5[ 	]*cmc.*
+[ 	]*[a-f0-9]+:[ 	]*c4 62 59 6c f5[ 	]*tcmmimfp16ps %tmm4,%tmm5,\(bad\)
+[ 	]*[a-f0-9]+:[ 	]*c4 c2 59 6c f5[ 	]*tcmmimfp16ps %tmm4,\(bad\),%tmm6
+[ 	]*[a-f0-9]+:[ 	]*c4 e2 31 6c f5[ 	]*tcmmimfp16ps \(bad\),%tmm5,%tmm6
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-amx-complex-bad.s b/gas/testsuite/gas/i386/x86-64-amx-complex-bad.s
new file mode 100644
index 00000000000..b2e55b13825
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-amx-complex-bad.s
@@ -0,0 +1,17 @@
+# Check Illegal 64bit AMX-COMPLEX instructions
+
+.text
+	#tcmmimfp16ps %tmm4,%tmm5,%tmm6 set VEX.W = 1 (illegal value).
+	.insn VEX.128.66.0F38.W1 0x6c, %tmm5, %tmm4, %tmm6
+
+	#tcmmimfp16ps %tmm4,%tmm4,%tmm6 set VEX.L = 1 (illegal value).
+	.insn VEX.256.66.0F38.W0 0x6c, %tmm5, %tmm4, %tmm6
+
+	#tcmmimfp16ps %tmm4,%tmm5,%tmm6 set VEX.R = 0 (illegal value).
+	.insn VEX.128.66.0F38.W0 0x6c, %xmm5, %xmm4, %xmm14
+
+	#tcmmimfp16ps %tmm4,%tmm5,%tmm6 set VEX.B = 0 (illegal value).
+	.insn VEX.128.66.0F38.W0 0x6c, %xmm13, %xmm4, %xmm6
+
+	#tcmmimfp16ps %tmm4,%tmm5,%tmm6 set VEX.VVVV = 0110 (illegal value).
+	.insn VEX.128.66.0F38.W0 0x6c, %xmm5, %xmm9, %xmm6
diff --git a/gas/testsuite/gas/i386/x86-64-amx-complex-intel.d b/gas/testsuite/gas/i386/x86-64-amx-complex-intel.d
new file mode 100644
index 00000000000..8f2e015104f
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-amx-complex-intel.d
@@ -0,0 +1,18 @@
+#as:
+#objdump: -dw -Mintel
+#name: x86_64 AMX-COMPLEX insns (Intel disassembly)
+#source: x86-64-amx-complex.s
+
+.*: +file format .*
+
+Disassembly of section \.text:
+
+0+ <_start>:
+\s*[a-f0-9]+:\s*c4 e2 59 6c f5\s+tcmmimfp16ps tmm6,tmm5,tmm4
+\s*[a-f0-9]+:\s*c4 e2 71 6c da\s+tcmmimfp16ps tmm3,tmm2,tmm1
+\s*[a-f0-9]+:\s*c4 e2 58 6c f5\s+tcmmrlfp16ps tmm6,tmm5,tmm4
+\s*[a-f0-9]+:\s*c4 e2 70 6c da\s+tcmmrlfp16ps tmm3,tmm2,tmm1
+\s*[a-f0-9]+:\s*c4 e2 59 6c f5\s+tcmmimfp16ps tmm6,tmm5,tmm4
+\s*[a-f0-9]+:\s*c4 e2 71 6c da\s+tcmmimfp16ps tmm3,tmm2,tmm1
+\s*[a-f0-9]+:\s*c4 e2 58 6c f5\s+tcmmrlfp16ps tmm6,tmm5,tmm4
+\s*[a-f0-9]+:\s*c4 e2 70 6c da\s+tcmmrlfp16ps tmm3,tmm2,tmm1
diff --git a/gas/testsuite/gas/i386/x86-64-amx-complex.d b/gas/testsuite/gas/i386/x86-64-amx-complex.d
new file mode 100644
index 00000000000..b2157960027
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-amx-complex.d
@@ -0,0 +1,15 @@
+#as:
+#objdump: -dw
+#name: x86_64 AMX-COMPLEX insns
+#source: x86-64-amx-complex.s
+
+.*: +file format .*
+
+Disassembly of section \.text:
+
+0+ <_start>:
+\s*[a-f0-9]+:\s*c4 e2 59 6c f5\s+tcmmimfp16ps %tmm4,%tmm5,%tmm6
+\s*[a-f0-9]+:\s*c4 e2 71 6c da\s+tcmmimfp16ps %tmm1,%tmm2,%tmm3
+\s*[a-f0-9]+:\s*c4 e2 58 6c f5\s+tcmmrlfp16ps %tmm4,%tmm5,%tmm6
+\s*[a-f0-9]+:\s*c4 e2 70 6c da\s+tcmmrlfp16ps %tmm1,%tmm2,%tmm3
+#pass
diff --git a/gas/testsuite/gas/i386/x86-64-amx-complex.s b/gas/testsuite/gas/i386/x86-64-amx-complex.s
new file mode 100644
index 00000000000..56f1a00fa9e
--- /dev/null
+++ b/gas/testsuite/gas/i386/x86-64-amx-complex.s
@@ -0,0 +1,15 @@
+# Check 64bit AMX-COMPLEX instructions
+
+	.allow_index_reg
+	.text
+_start:
+	tcmmimfp16ps	%tmm4, %tmm5, %tmm6	 #AMX-COMPLEX
+	tcmmimfp16ps	%tmm1, %tmm2, %tmm3	 #AMX-COMPLEX
+	tcmmrlfp16ps	%tmm4, %tmm5, %tmm6	 #AMX-COMPLEX
+	tcmmrlfp16ps	%tmm1, %tmm2, %tmm3	 #AMX-COMPLEX
+
+.intel_syntax noprefix
+	tcmmimfp16ps	tmm6, tmm5, tmm4	 #AMX-COMPLEX
+	tcmmimfp16ps	tmm3, tmm2, tmm1	 #AMX-COMPLEX
+	tcmmrlfp16ps	tmm6, tmm5, tmm4	 #AMX-COMPLEX
+	tcmmrlfp16ps	tmm3, tmm2, tmm1	 #AMX-COMPLEX
diff --git a/opcodes/i386-dis.c b/opcodes/i386-dis.c
index a414e8c9b1e..d6b0fdd4ba3 100644
--- a/opcodes/i386-dis.c
+++ b/opcodes/i386-dis.c
@@ -943,6 +943,7 @@ enum
   MOD_VEX_0F385E_X86_64_P_1_W_0,
   MOD_VEX_0F385E_X86_64_P_2_W_0,
   MOD_VEX_0F385E_X86_64_P_3_W_0,
+  MOD_VEX_0F386C_X86_64_W_0,
   MOD_VEX_0F388C,
   MOD_VEX_0F388E,
   MOD_VEX_0F3A30_L_0,
@@ -1145,6 +1146,7 @@ enum
   PREFIX_VEX_0F3851_W_0,
   PREFIX_VEX_0F385C_X86_64,
   PREFIX_VEX_0F385E_X86_64,
+  PREFIX_VEX_0F386C_X86_64_W_0_M_1_L_0,
   PREFIX_VEX_0F3872,
   PREFIX_VEX_0F38B0_W_0,
   PREFIX_VEX_0F38B1_W_0,
@@ -1298,6 +1300,7 @@ enum
   X86_64_VEX_0F384B,
   X86_64_VEX_0F385C,
   X86_64_VEX_0F385E,
+  X86_64_VEX_0F386C,
   X86_64_VEX_0F38E0,
   X86_64_VEX_0F38E1,
   X86_64_VEX_0F38E2,
@@ -1398,6 +1401,7 @@ enum
   VEX_LEN_0F385E_X86_64_P_1_W_0_M_0,
   VEX_LEN_0F385E_X86_64_P_2_W_0_M_0,
   VEX_LEN_0F385E_X86_64_P_3_W_0_M_0,
+  VEX_LEN_0F386C_X86_64_W_0_M_1,
   VEX_LEN_0F38DB,
   VEX_LEN_0F38F2,
   VEX_LEN_0F38F3,
@@ -1565,6 +1569,7 @@ enum
   VEX_W_0F385E_X86_64_P_1,
   VEX_W_0F385E_X86_64_P_2,
   VEX_W_0F385E_X86_64_P_3,
+  VEX_W_0F386C_X86_64,
   VEX_W_0F3872_P_1,
   VEX_W_0F3878,
   VEX_W_0F3879,
@@ -4119,6 +4124,13 @@ static const struct dis386 prefix_table[][4] = {
     { VEX_W_TABLE (VEX_W_0F385E_X86_64_P_3) },
   },
 
+  /* PREFIX_VEX_0F386C_X86_64_W_0_M_1_L_0 */
+  {
+    { "tcmmrlfp16ps", { TMM, EXtmm, VexTmm }, 0 },
+    { Bad_Opcode },
+    { "tcmmimfp16ps", { TMM, EXtmm, VexTmm }, 0 },
+  },
+
   /* PREFIX_VEX_0F3872 */
   {
     { Bad_Opcode },
@@ -4486,6 +4498,12 @@ static const struct dis386 x86_64_table[][2] = {
     { PREFIX_TABLE (PREFIX_VEX_0F385E_X86_64) },
   },
 
+  /* X86_64_VEX_0F386C */
+  {
+    { Bad_Opcode },
+    { VEX_W_TABLE (VEX_W_0F386C_X86_64) },
+  },
+
   /* X86_64_VEX_0F38E0 */
   {
     { Bad_Opcode },
@@ -6461,7 +6479,7 @@ static const struct dis386 vex_table[][256] = {
     { Bad_Opcode },
     { Bad_Opcode },
     { Bad_Opcode },
-    { Bad_Opcode },
+    { X86_64_TABLE (X86_64_VEX_0F386C) },
     { Bad_Opcode },
     { Bad_Opcode },
     { Bad_Opcode },
@@ -7181,6 +7199,11 @@ static const struct dis386 vex_len_table[][2] = {
     { "tdpbssd", {TMM, EXtmm, VexTmm }, 0 },
   },
 
+  /* VEX_LEN_0F386C_X86_64_W_0_M_1 */
+  {
+    { PREFIX_TABLE (PREFIX_VEX_0F386C_X86_64_W_0_M_1_L_0) },
+  },
+
   /* VEX_LEN_0F38DB */
   {
     { "vaesimc",	{ XM, EXx }, PREFIX_DATA },
@@ -7849,6 +7872,10 @@ static const struct dis386 vex_w_table[][2] = {
     /* VEX_W_0F385E_X86_64_P_3 */
     { MOD_TABLE (MOD_VEX_0F385E_X86_64_P_3_W_0) },
   },
+  {
+    /* VEX_W_0F386C_X86_64 */
+    { MOD_TABLE (MOD_VEX_0F386C_X86_64_W_0) },
+  },
   {
     /* VEX_W_0F3872_P_1 */
     { "%XVvcvtneps2bf16%XY", { XMM, EXx }, 0 },
@@ -8696,6 +8723,11 @@ static const struct dis386 mod_table[][2] = {
     { Bad_Opcode },
     { VEX_LEN_TABLE (VEX_LEN_0F385E_X86_64_P_3_W_0_M_0) },
   },
+  {
+    /* MOD_VEX_0F386C_X86_64_W_0 */
+    { Bad_Opcode },
+    { VEX_LEN_TABLE (VEX_LEN_0F386C_X86_64_W_0_M_1) },
+  },
   {
     /* MOD_VEX_0F388C */
     { "vpmaskmov%DQ",	{ XM, Vex, Mx }, PREFIX_DATA },
diff --git a/opcodes/i386-gen.c b/opcodes/i386-gen.c
index 489ae3429c9..c2ac3c6832d 100644
--- a/opcodes/i386-gen.c
+++ b/opcodes/i386-gen.c
@@ -240,6 +240,8 @@ static const dependency isa_dependencies[] =
     "AMX_TILE" },
   { "AMX_FP16",
     "AMX_TILE" },
+  { "AMX_COMPLEX",
+    "AMX_TILE" },
   { "KL",
     "SSE2" },
   { "WIDEKL",
@@ -378,6 +380,7 @@ static bitfield cpu_flags[] =
   BITFIELD (AMX_INT8),
   BITFIELD (AMX_BF16),
   BITFIELD (AMX_FP16),
+  BITFIELD (AMX_COMPLEX),
   BITFIELD (AMX_TILE),
   BITFIELD (MOVDIRI),
   BITFIELD (MOVDIR64B),
diff --git a/opcodes/i386-opc.h b/opcodes/i386-opc.h
index 23d93ae6f81..b17e8341aa2 100644
--- a/opcodes/i386-opc.h
+++ b/opcodes/i386-opc.h
@@ -248,6 +248,8 @@ enum
   CpuAMX_BF16,
   /* AMX-FP16 instructions required */
   CpuAMX_FP16,
+  /* AMX-COMPLEX instructions required.  */
+  CpuAMX_COMPLEX,
   /* AMX-TILE instructions required */
   CpuAMX_TILE,
   /* GFNI instructions required */
@@ -432,6 +434,7 @@ typedef union i386_cpu_flags
       unsigned int cpuamx_int8:1;
       unsigned int cpuamx_bf16:1;
       unsigned int cpuamx_fp16:1;
+      unsigned int cpuamx_complex:1;
       unsigned int cpuamx_tile:1;
       unsigned int cpugfni:1;
       unsigned int cpuvaes:1;
diff --git a/opcodes/i386-opc.tbl b/opcodes/i386-opc.tbl
index 9cc909925f4..15d48eeb4c7 100644
--- a/opcodes/i386-opc.tbl
+++ b/opcodes/i386-opc.tbl
@@ -3146,6 +3146,9 @@ xresldtrk, 0xf20f01e9, TSXLDTRK, NoSuf, {}
 ldtilecfg, 0x49/0, AMX_TILE|x64, Modrm|Vex128|Space0F38|VexW0|NoSuf, { Unspecified|BaseIndex }
 sttilecfg, 0x6649/0, AMX_TILE|x64, Modrm|Vex128|Space0F38|VexW0|NoSuf, { Unspecified|BaseIndex }
 
+tcmmimfp16ps, 0x666c, AMX_COMPLEX|x64, Modrm|Vex128|Space0F38|VexVVVV|VexW0|SwapSources|NoSuf, { RegTMM, RegTMM, RegTMM }
+tcmmrlfp16ps, 0x6c, AMX_COMPLEX|x64, Modrm|Vex128|Space0F38|VexVVVV|VexW0|SwapSources|NoSuf, { RegTMM, RegTMM, RegTMM }
+
 tdpbf16ps, 0xf35c, AMX_BF16|x64, Modrm|Vex128|Space0F38|VexVVVV|VexW0|SwapSources|NoSuf, { RegTMM, RegTMM, RegTMM }
 tdpfp16ps, 0xf25c, AMX_FP16|x64, Modrm|Vex128|Space0F38|VexVVVV|VexW0|SwapSources|NoSuf, { RegTMM, RegTMM, RegTMM }
 tdpbssd, 0xf25e, AMX_INT8|x64, Modrm|Vex128|Space0F38|VexVVVV|VexW0|SwapSources|NoSuf, { RegTMM, RegTMM, RegTMM }
