diff --git a/bfd/elfxx-riscv.c b/bfd/elfxx-riscv.c
index b7e067794ba8..21fc99ef8c68 100644
--- a/bfd/elfxx-riscv.c
+++ b/bfd/elfxx-riscv.c
@@ -1148,6 +1148,7 @@ static struct riscv_implicit_subset riscv_implicit_subsets[] =
   {"zhinx", "zhinxmin",	check_implicit_always},
   {"zhinxmin", "zfinx",	check_implicit_always},
   {"zfinx", "zicsr",	check_implicit_always},
+  {"zabha", "a",	check_implicit_always},
   {"zacas", "a",	check_implicit_always},
   {"zk", "zkn",		check_implicit_always},
   {"zk", "zkr",		check_implicit_always},
@@ -1260,6 +1261,7 @@ static struct riscv_supported_ext riscv_supported_std_z_ext[] =
   {"zihintntl",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zihintpause",	ISA_SPEC_CLASS_DRAFT,		2, 0,  0 },
   {"zmmul",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
+  {"zabha",		ISA_SPEC_CLASS_DRAFT,		0, 9,  0 },
   {"zacas",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zawrs",		ISA_SPEC_CLASS_DRAFT,		1, 0,  0 },
   {"zfa",		ISA_SPEC_CLASS_DRAFT,		0, 1,  0 },
@@ -2411,6 +2413,11 @@ riscv_multi_subset_supports (riscv_parse_subset_t *rps,
       return riscv_subset_supports (rps, "zmmul");
     case INSN_CLASS_A:
       return riscv_subset_supports (rps, "a");
+    case INSN_CLASS_ZABHA:
+      return riscv_subset_supports (rps, "zabha");
+    case INSN_CLASS_ZABHA_AND_ZACAS:
+      return (riscv_subset_supports (rps, "zabha")
+	      && riscv_subset_supports (rps, "zacas"));
     case INSN_CLASS_ZACAS:
       return riscv_subset_supports (rps, "zacas");
     case INSN_CLASS_ZAWRS:
@@ -2623,6 +2630,16 @@ riscv_multi_subset_supports_ext (riscv_parse_subset_t *rps,
       return _ ("m' or `zmmul");
     case INSN_CLASS_A:
       return "a";
+    case INSN_CLASS_ZABHA:
+      return "zabha";
+    case INSN_CLASS_ZABHA_AND_ZACAS:
+      if (!riscv_subset_supports (rps, "zabha")
+	  && !riscv_subset_supports (rps, "zacas"))
+	return _("zabha' and `zacas");
+      else if (!riscv_subset_supports (rps, "zabha"))
+	return "zabha";
+      else
+	return "zacas";
     case INSN_CLASS_ZACAS:
       return "zacas";
     case INSN_CLASS_ZAWRS:
diff --git a/gas/testsuite/gas/riscv/zabha-zacas.d b/gas/testsuite/gas/riscv/zabha-zacas.d
new file mode 100644
index 000000000000..ea3657a6093c
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zabha-zacas.d
@@ -0,0 +1,17 @@
+#as: -march=rv32i_zabha_zacas
+#objdump: -d
+
+.*:[ 	]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ 	]+[0-9a-f]+:[ 	]+28c5852f[ 	]+amocas\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+2cc5852f[ 	]+amocas\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+2ac5852f[ 	]+amocas\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+2ec5852f[ 	]+amocas\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+28c5952f[ 	]+amocas\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+2cc5952f[ 	]+amocas\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+2ac5952f[ 	]+amocas\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+2ec5952f[ 	]+amocas\.h\.aqrl[ 	]+a0,a2,\(a1\)
diff --git a/gas/testsuite/gas/riscv/zabha-zacas.s b/gas/testsuite/gas/riscv/zabha-zacas.s
new file mode 100644
index 000000000000..09aac3b94018
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zabha-zacas.s
@@ -0,0 +1,9 @@
+target:
+	amocas.b	a0, a2, (a1)
+	amocas.b.aq	a0, a2, (a1)
+	amocas.b.rl	a0, a2, (a1)
+	amocas.b.aqrl	a0, a2, (a1)
+	amocas.h	a0, a2, (a1)
+	amocas.h.aq	a0, a2, (a1)
+	amocas.h.rl	a0, a2, (a1)
+	amocas.h.aqrl	a0, a2, (a1)
diff --git a/gas/testsuite/gas/riscv/zabha.d b/gas/testsuite/gas/riscv/zabha.d
new file mode 100644
index 000000000000..0cc39f9da821
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zabha.d
@@ -0,0 +1,81 @@
+#as: -march=rv32i_zabha
+#objdump: -d
+
+.*:[ 	]+file format .*
+
+
+Disassembly of section .text:
+
+0+000 <target>:
+[ 	]+[0-9a-f]+:[ 	]+08c5852f[ 	]+amoswap\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+0cc5852f[ 	]+amoswap\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+0ac5852f[ 	]+amoswap\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+0ec5852f[ 	]+amoswap\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+00c5852f[ 	]+amoadd\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+04c5852f[ 	]+amoadd\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+02c5852f[ 	]+amoadd\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+06c5852f[ 	]+amoadd\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+20c5852f[ 	]+amoxor\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+24c5852f[ 	]+amoxor\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+22c5852f[ 	]+amoxor\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+26c5852f[ 	]+amoxor\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+60c5852f[ 	]+amoand\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+64c5852f[ 	]+amoand\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+62c5852f[ 	]+amoand\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+66c5852f[ 	]+amoand\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+40c5852f[ 	]+amoor\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+44c5852f[ 	]+amoor\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+42c5852f[ 	]+amoor\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+46c5852f[ 	]+amoor\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+80c5852f[ 	]+amomin\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+84c5852f[ 	]+amomin\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+82c5852f[ 	]+amomin\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+86c5852f[ 	]+amomin\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a0c5852f[ 	]+amomax\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a4c5852f[ 	]+amomax\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a2c5852f[ 	]+amomax\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a6c5852f[ 	]+amomax\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c0c5852f[ 	]+amominu\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c4c5852f[ 	]+amominu\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c2c5852f[ 	]+amominu\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c6c5852f[ 	]+amominu\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e0c5852f[ 	]+amomaxu\.b[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e4c5852f[ 	]+amomaxu\.b\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e2c5852f[ 	]+amomaxu\.b\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e6c5852f[ 	]+amomaxu\.b\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+08c5952f[ 	]+amoswap\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+0cc5952f[ 	]+amoswap\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+0ac5952f[ 	]+amoswap\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+0ec5952f[ 	]+amoswap\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+00c5952f[ 	]+amoadd\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+04c5952f[ 	]+amoadd\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+02c5952f[ 	]+amoadd\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+06c5952f[ 	]+amoadd\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+20c5952f[ 	]+amoxor\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+24c5952f[ 	]+amoxor\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+22c5952f[ 	]+amoxor\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+26c5952f[ 	]+amoxor\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+60c5952f[ 	]+amoand\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+64c5952f[ 	]+amoand\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+62c5952f[ 	]+amoand\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+66c5952f[ 	]+amoand\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+40c5952f[ 	]+amoor\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+44c5952f[ 	]+amoor\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+42c5952f[ 	]+amoor\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+46c5952f[ 	]+amoor\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+80c5952f[ 	]+amomin\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+84c5952f[ 	]+amomin\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+82c5952f[ 	]+amomin\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+86c5952f[ 	]+amomin\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a0c5952f[ 	]+amomax\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a4c5952f[ 	]+amomax\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a2c5952f[ 	]+amomax\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+a6c5952f[ 	]+amomax\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c0c5952f[ 	]+amominu\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c4c5952f[ 	]+amominu\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c2c5952f[ 	]+amominu\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+c6c5952f[ 	]+amominu\.h\.aqrl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e0c5952f[ 	]+amomaxu\.h[ 		]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e4c5952f[ 	]+amomaxu\.h\.aq[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e2c5952f[ 	]+amomaxu\.h\.rl[ 	]+a0,a2,\(a1\)
+[ 	]+[0-9a-f]+:[ 	]+e6c5952f[ 	]+amomaxu\.h\.aqrl[ 	]+a0,a2,\(a1\)
diff --git a/gas/testsuite/gas/riscv/zabha.s b/gas/testsuite/gas/riscv/zabha.s
new file mode 100644
index 000000000000..ab521119a75e
--- /dev/null
+++ b/gas/testsuite/gas/riscv/zabha.s
@@ -0,0 +1,73 @@
+target:
+	amoswap.b	a0, a2, (a1)
+	amoswap.b.aq	a0, a2, (a1)
+	amoswap.b.rl	a0, a2, (a1)
+	amoswap.b.aqrl	a0, a2, (a1)
+	amoadd.b	a0, a2, (a1)
+	amoadd.b.aq	a0, a2, (a1)
+	amoadd.b.rl	a0, a2, (a1)
+	amoadd.b.aqrl	a0, a2, (a1)
+	amoxor.b	a0, a2, (a1)
+	amoxor.b.aq	a0, a2, (a1)
+	amoxor.b.rl	a0, a2, (a1)
+	amoxor.b.aqrl	a0, a2, (a1)
+	amoand.b	a0, a2, (a1)
+	amoand.b.aq	a0, a2, (a1)
+	amoand.b.rl	a0, a2, (a1)
+	amoand.b.aqrl	a0, a2, (a1)
+	amoor.b		a0, a2, (a1)
+	amoor.b.aq	a0, a2, (a1)
+	amoor.b.rl	a0, a2, (a1)
+	amoor.b.aqrl	a0, a2, (a1)
+	amomin.b	a0, a2, (a1)
+	amomin.b.aq	a0, a2, (a1)
+	amomin.b.rl	a0, a2, (a1)
+	amomin.b.aqrl	a0, a2, (a1)
+	amomax.b	a0, a2, (a1)
+	amomax.b.aq	a0, a2, (a1)
+	amomax.b.rl	a0, a2, (a1)
+	amomax.b.aqrl	a0, a2, (a1)
+	amominu.b	a0, a2, (a1)
+	amominu.b.aq	a0, a2, (a1)
+	amominu.b.rl	a0, a2, (a1)
+	amominu.b.aqrl	a0, a2, (a1)
+	amomaxu.b	a0, a2, (a1)
+	amomaxu.b.aq	a0, a2, (a1)
+	amomaxu.b.rl	a0, a2, (a1)
+	amomaxu.b.aqrl	a0, a2, (a1)
+	amoswap.h	a0, a2, (a1)
+	amoswap.h.aq	a0, a2, (a1)
+	amoswap.h.rl	a0, a2, (a1)
+	amoswap.h.aqrl	a0, a2, (a1)
+	amoadd.h	a0, a2, (a1)
+	amoadd.h.aq	a0, a2, (a1)
+	amoadd.h.rl	a0, a2, (a1)
+	amoadd.h.aqrl	a0, a2, (a1)
+	amoxor.h	a0, a2, (a1)
+	amoxor.h.aq	a0, a2, (a1)
+	amoxor.h.rl	a0, a2, (a1)
+	amoxor.h.aqrl	a0, a2, (a1)
+	amoand.h	a0, a2, (a1)
+	amoand.h.aq	a0, a2, (a1)
+	amoand.h.rl	a0, a2, (a1)
+	amoand.h.aqrl	a0, a2, (a1)
+	amoor.h		a0, a2, (a1)
+	amoor.h.aq	a0, a2, (a1)
+	amoor.h.rl	a0, a2, (a1)
+	amoor.h.aqrl	a0, a2, (a1)
+	amomin.h	a0, a2, (a1)
+	amomin.h.aq	a0, a2, (a1)
+	amomin.h.rl	a0, a2, (a1)
+	amomin.h.aqrl	a0, a2, (a1)
+	amomax.h	a0, a2, (a1)
+	amomax.h.aq	a0, a2, (a1)
+	amomax.h.rl	a0, a2, (a1)
+	amomax.h.aqrl	a0, a2, (a1)
+	amominu.h	a0, a2, (a1)
+	amominu.h.aq	a0, a2, (a1)
+	amominu.h.rl	a0, a2, (a1)
+	amominu.h.aqrl	a0, a2, (a1)
+	amomaxu.h	a0, a2, (a1)
+	amomaxu.h.aq	a0, a2, (a1)
+	amomaxu.h.rl	a0, a2, (a1)
+	amomaxu.h.aqrl	a0, a2, (a1)
diff --git a/include/opcode/riscv-opc.h b/include/opcode/riscv-opc.h
index 8fb59e3db93e..49786513a0ab 100644
--- a/include/opcode/riscv-opc.h
+++ b/include/opcode/riscv-opc.h
@@ -2315,6 +2315,47 @@
 #define MASK_C_NTL_S1 0xffff
 #define MATCH_C_NTL_ALL 0x9016
 #define MASK_C_NTL_ALL 0xffff
+/* Zabha instructions.  */
+#define MATCH_AMOADD_B 0x2f
+#define MASK_AMOADD_B 0xf800707f
+#define MATCH_AMOADD_H 0x102f
+#define MASK_AMOADD_H 0xf800707f
+#define MATCH_AMOAND_B 0x6000002f
+#define MASK_AMOAND_B 0xf800707f
+#define MATCH_AMOAND_H 0x6000102f
+#define MASK_AMOAND_H 0xf800707f
+#define MATCH_AMOMAX_B 0xa000002f
+#define MASK_AMOMAX_B 0xf800707f
+#define MATCH_AMOMAX_H 0xa000102f
+#define MASK_AMOMAX_H 0xf800707f
+#define MATCH_AMOMAXU_B 0xe000002f
+#define MASK_AMOMAXU_B 0xf800707f
+#define MATCH_AMOMAXU_H 0xe000102f
+#define MASK_AMOMAXU_H 0xf800707f
+#define MATCH_AMOMIN_B 0x8000002f
+#define MASK_AMOMIN_B 0xf800707f
+#define MATCH_AMOMIN_H 0x8000102f
+#define MASK_AMOMIN_H 0xf800707f
+#define MATCH_AMOMINU_B 0xc000002f
+#define MASK_AMOMINU_B 0xf800707f
+#define MATCH_AMOMINU_H 0xc000102f
+#define MASK_AMOMINU_H 0xf800707f
+#define MATCH_AMOOR_B 0x4000002f
+#define MASK_AMOOR_B 0xf800707f
+#define MATCH_AMOOR_H 0x4000102f
+#define MASK_AMOOR_H 0xf800707f
+#define MATCH_AMOSWAP_B 0x800002f
+#define MASK_AMOSWAP_B 0xf800707f
+#define MATCH_AMOSWAP_H 0x800102f
+#define MASK_AMOSWAP_H 0xf800707f
+#define MATCH_AMOXOR_B 0x2000002f
+#define MASK_AMOXOR_B 0xf800707f
+#define MATCH_AMOXOR_H 0x2000102f
+#define MASK_AMOXOR_H 0xf800707f
+#define MATCH_AMOCAS_B 0x2800002f
+#define MASK_AMOCAS_B 0xf800707f
+#define MATCH_AMOCAS_H 0x2800102f
+#define MASK_AMOCAS_H 0xf800707f
 /* Zacas instructions.  */
 #define MATCH_AMOCAS_D 0x2800302f
 #define MASK_AMOCAS_D 0xf800707f
@@ -3377,6 +3418,27 @@ DECLARE_INSN(c_ntl_p1, MATCH_C_NTL_P1, MASK_C_NTL_P1)
 DECLARE_INSN(c_ntl_pall, MATCH_C_NTL_PALL, MASK_C_NTL_PALL)
 DECLARE_INSN(c_ntl_s1, MATCH_C_NTL_S1, MASK_C_NTL_S1)
 DECLARE_INSN(c_ntl_all, MATCH_C_NTL_ALL, MASK_C_NTL_ALL)
+/* Zabha instructions.  */
+DECLARE_INSN(amoadd_b, MATCH_AMOADD_B, MASK_AMOADD_B)
+DECLARE_INSN(amoadd_h, MATCH_AMOADD_H, MASK_AMOADD_H)
+DECLARE_INSN(amoand_b, MATCH_AMOAND_B, MASK_AMOAND_B)
+DECLARE_INSN(amoand_h, MATCH_AMOAND_H, MASK_AMOAND_H)
+DECLARE_INSN(amomax_b, MATCH_AMOMAX_B, MASK_AMOMAX_B)
+DECLARE_INSN(amomax_h, MATCH_AMOMAX_H, MASK_AMOMAX_H)
+DECLARE_INSN(amomaxu_b, MATCH_AMOMAXU_B, MASK_AMOMAXU_B)
+DECLARE_INSN(amomaxu_h, MATCH_AMOMAXU_H, MASK_AMOMAXU_H)
+DECLARE_INSN(amomin_b, MATCH_AMOMIN_B, MASK_AMOMIN_B)
+DECLARE_INSN(amomin_h, MATCH_AMOMIN_H, MASK_AMOMIN_H)
+DECLARE_INSN(amominu_b, MATCH_AMOMINU_B, MASK_AMOMINU_B)
+DECLARE_INSN(amominu_h, MATCH_AMOMINU_H, MASK_AMOMINU_H)
+DECLARE_INSN(amoor_b, MATCH_AMOOR_B, MASK_AMOOR_B)
+DECLARE_INSN(amoor_h, MATCH_AMOOR_H, MASK_AMOOR_H)
+DECLARE_INSN(amoswap_b, MATCH_AMOSWAP_B, MASK_AMOSWAP_B)
+DECLARE_INSN(amoswap_h, MATCH_AMOSWAP_H, MASK_AMOSWAP_H)
+DECLARE_INSN(amoxor_b, MATCH_AMOXOR_B, MASK_AMOXOR_B)
+DECLARE_INSN(amoxor_h, MATCH_AMOXOR_H, MASK_AMOXOR_H)
+DECLARE_INSN(amocas_b, MATCH_AMOCAS_B, MASK_AMOCAS_B)
+DECLARE_INSN(amocas_h, MATCH_AMOCAS_H, MASK_AMOCAS_H)
 /* Zacas instructions.  */
 DECLARE_INSN(amocas_d, MATCH_AMOCAS_D, MASK_AMOCAS_D)
 DECLARE_INSN(amocas_q, MATCH_AMOCAS_Q, MASK_AMOCAS_Q)
diff --git a/include/opcode/riscv.h b/include/opcode/riscv.h
index aefbfc7db81e..f22f89bc38bd 100644
--- a/include/opcode/riscv.h
+++ b/include/opcode/riscv.h
@@ -396,6 +396,8 @@ enum riscv_insn_class
   INSN_CLASS_ZIHINTNTL_AND_C,
   INSN_CLASS_ZIHINTPAUSE,
   INSN_CLASS_ZMMUL,
+  INSN_CLASS_ZABHA,
+  INSN_CLASS_ZABHA_AND_ZACAS,
   INSN_CLASS_ZACAS,
   INSN_CLASS_ZAWRS,
   INSN_CLASS_F_INX,
diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c
index 58087ca19cac..5955092d6f70 100644
--- a/opcodes/riscv-opc.c
+++ b/opcodes/riscv-opc.c
@@ -1000,6 +1000,88 @@ const struct riscv_opcode riscv_opcodes[] =
 {"czero.eqz",  0, INSN_CLASS_ZICOND, "d,s,t", MATCH_CZERO_EQZ, MASK_CZERO_EQZ, match_opcode, 0 },
 {"czero.nez",  0, INSN_CLASS_ZICOND, "d,s,t", MATCH_CZERO_NEZ, MASK_CZERO_NEZ, match_opcode, 0 },
 
+/* Zabha instructions.  */
+{"amoadd.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b",         0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B|MASK_AQ, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B|MASK_AQ, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B|MASK_AQ, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b.aq",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B|MASK_AQ, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B|MASK_AQ, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B|MASK_AQ, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B|MASK_AQ, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B|MASK_AQ, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B|MASK_AQ, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B|MASK_RL, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B|MASK_RL, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B|MASK_RL, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b.rl",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B|MASK_RL, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B|MASK_RL, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B|MASK_RL, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B|MASK_RL, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B|MASK_RL, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B|MASK_RL, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_B|MASK_AQRL, MASK_AMOADD_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoswap.b.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_B|MASK_AQRL, MASK_AMOSWAP_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoand.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_B|MASK_AQRL, MASK_AMOAND_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoor.b.aqrl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_B|MASK_AQRL, MASK_AMOOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoxor.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_B|MASK_AQRL, MASK_AMOXOR_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomax.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_B|MASK_AQRL, MASK_AMOMAX_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomaxu.b.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_B|MASK_AQRL, MASK_AMOMAXU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amomin.b.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_B|MASK_AQRL, MASK_AMOMIN_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amominu.b.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_B|MASK_AQRL, MASK_AMOMINU_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amoadd.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h",         0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h",        0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h",       0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoadd.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H|MASK_AQ, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H|MASK_AQ, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H|MASK_AQ, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h.aq",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H|MASK_AQ, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H|MASK_AQ, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H|MASK_AQ, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H|MASK_AQ, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h.aq",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H|MASK_AQ, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h.aq",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H|MASK_AQ, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoadd.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H|MASK_RL, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H|MASK_RL, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H|MASK_RL, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h.rl",      0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H|MASK_RL, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H|MASK_RL, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H|MASK_RL, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H|MASK_RL, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h.rl",     0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H|MASK_RL, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h.rl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H|MASK_RL, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoadd.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOADD_H|MASK_AQRL, MASK_AMOADD_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoswap.h.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOSWAP_H|MASK_AQRL, MASK_AMOSWAP_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoand.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOAND_H|MASK_AQRL, MASK_AMOAND_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoor.h.aqrl",    0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOOR_H|MASK_AQRL, MASK_AMOOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amoxor.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOXOR_H|MASK_AQRL, MASK_AMOXOR_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomax.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAX_H|MASK_AQRL, MASK_AMOMAX_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomaxu.h.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMAXU_H|MASK_AQRL, MASK_AMOMAXU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amomin.h.aqrl",   0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMIN_H|MASK_AQRL, MASK_AMOMIN_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amominu.h.aqrl",  0, INSN_CLASS_ZABHA, "d,t,0(s)", MATCH_AMOMINU_H|MASK_AQRL, MASK_AMOMINU_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amocas.b",        0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_B, MASK_AMOCAS_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amocas.h",        0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_H, MASK_AMOCAS_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amocas.b.aq",     0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_B|MASK_AQ, MASK_AMOCAS_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amocas.h.aq",     0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_H|MASK_AQ, MASK_AMOCAS_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amocas.b.rl",     0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_B|MASK_RL, MASK_AMOCAS_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amocas.h.rl",     0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_H|MASK_RL, MASK_AMOCAS_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+{"amocas.b.aqrl",   0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_B|MASK_AQRL, MASK_AMOCAS_B|MASK_AQRL, match_opcode, INSN_DREF|INSN_1_BYTE },
+{"amocas.h.aqrl",   0, INSN_CLASS_ZABHA_AND_ZACAS, "d,t,0(s)", MATCH_AMOCAS_H|MASK_AQRL, MASK_AMOCAS_H|MASK_AQRL, match_opcode, INSN_DREF|INSN_2_BYTE },
+
 /* Zacas instructions.  */
 {"amocas.w",       0, INSN_CLASS_ZACAS, "d,t,0(s)", MATCH_AMOCAS_W, MASK_AMOCAS_W|MASK_AQRL, match_opcode, INSN_DREF|INSN_4_BYTE },
 {"amocas.w.aq",    0, INSN_CLASS_ZACAS, "d,t,0(s)", MATCH_AMOCAS_W|MASK_AQ, MASK_AMOCAS_W|MASK_AQRL, match_opcode, INSN_DREF|INSN_4_BYTE },
