diff --git a/gcc/common/config/riscv/riscv-common.cc b/gcc/common/config/riscv/riscv-common.cc
index 88204393fde..78dfd6b1470 100644
--- a/gcc/common/config/riscv/riscv-common.cc
+++ b/gcc/common/config/riscv/riscv-common.cc
@@ -79,6 +79,9 @@ static const riscv_implied_info_t riscv_implied_info[] =
   {"f", "zicsr"},
   {"d", "zicsr"},
 
+  {"a", "zaamo"},
+  {"a", "zalrsc"},
+
   {"zdinx", "zfinx"},
   {"zfinx", "zicsr"},
   {"zdinx", "zicsr"},
@@ -255,6 +258,8 @@ static const struct riscv_ext_version riscv_ext_version_table[] =
   {"za64rs",  ISA_SPEC_CLASS_NONE, 1, 0},
   {"za128rs", ISA_SPEC_CLASS_NONE, 1, 0},
   {"zawrs", ISA_SPEC_CLASS_NONE, 1, 0},
+  {"zaamo", ISA_SPEC_CLASS_NONE, 1, 0},
+  {"zalrsc", ISA_SPEC_CLASS_NONE, 1, 0},
 
   {"zba", ISA_SPEC_CLASS_NONE, 1, 0},
   {"zbb", ISA_SPEC_CLASS_NONE, 1, 0},
@@ -1616,9 +1621,11 @@ static const riscv_ext_flag_table_t riscv_ext_flag_table[] =
   {"zifencei", &gcc_options::x_riscv_zi_subext, MASK_ZIFENCEI},
   {"zicond",   &gcc_options::x_riscv_zi_subext, MASK_ZICOND},
 
-  {"za64rs", &gcc_options::x_riscv_za_subext, MASK_ZA64RS},
+  {"za64rs",  &gcc_options::x_riscv_za_subext, MASK_ZA64RS},
   {"za128rs", &gcc_options::x_riscv_za_subext, MASK_ZA128RS},
-  {"zawrs", &gcc_options::x_riscv_za_subext, MASK_ZAWRS},
+  {"zawrs",   &gcc_options::x_riscv_za_subext, MASK_ZAWRS},
+  {"zaamo",   &gcc_options::x_riscv_za_subext, MASK_ZAAMO},
+  {"zalrsc",  &gcc_options::x_riscv_za_subext, MASK_ZALRSC},
 
   {"zba",    &gcc_options::x_riscv_zb_subext, MASK_ZBA},
   {"zbb",    &gcc_options::x_riscv_zb_subext, MASK_ZBB},
diff --git a/gcc/config/riscv/arch-canonicalize b/gcc/config/riscv/arch-canonicalize
index 8f7d040cdeb..6c10d1aa81b 100755
--- a/gcc/config/riscv/arch-canonicalize
+++ b/gcc/config/riscv/arch-canonicalize
@@ -40,6 +40,7 @@ LONG_EXT_PREFIXES = ['z', 's', 'h', 'x']
 #
 IMPLIED_EXT = {
   "d" : ["f", "zicsr"],
+  "a" : ["zaamo", "zalrsc"],
   "f" : ["zicsr"],
   "zdinx" : ["zfinx", "zicsr"],
   "zfinx" : ["zicsr"],
diff --git a/gcc/config/riscv/riscv.opt b/gcc/config/riscv/riscv.opt
index 78cb1c37e69..b13e993c47a 100644
--- a/gcc/config/riscv/riscv.opt
+++ b/gcc/config/riscv/riscv.opt
@@ -256,7 +256,11 @@ Mask(ZICCRSE)     Var(riscv_zi_subext)
 TargetVariable
 int riscv_za_subext
 
-Mask(ZAWRS) Var(riscv_za_subext)
+Mask(ZAWRS)  Var(riscv_za_subext)
+
+Mask(ZAAMO)  Var(riscv_za_subext)
+
+Mask(ZALRSC) Var(riscv_za_subext)
 
 Mask(ZA64RS)  Var(riscv_za_subext)
 
diff --git a/gcc/config/riscv/sync.md b/gcc/config/riscv/sync.md
index 6f0b5aae08d..c9544176ead 100644
--- a/gcc/config/riscv/sync.md
+++ b/gcc/config/riscv/sync.md
@@ -93,7 +93,7 @@
 		     (match_operand:GPR 1 "reg_or_0_operand" "rJ"))
 	   (match_operand:SI 2 "const_int_operand")] ;; model
 	 UNSPEC_SYNC_OLD_OP))]
-  "TARGET_ATOMIC"
+  "TARGET_ZAAMO"
   "amo<insn>.<amo>%A2\tzero,%z1,%0"
   [(set_attr "type" "atomic")
    (set (attr "length") (const_int 4))])
@@ -107,7 +107,7 @@
 		     (match_operand:GPR 2 "reg_or_0_operand" "rJ"))
 	   (match_operand:SI 3 "const_int_operand")] ;; model
 	 UNSPEC_SYNC_OLD_OP))]
-  "TARGET_ATOMIC"
+  "TARGET_ZAAMO"
   "amo<insn>.<amo>%A3\t%0,%z2,%1"
   [(set_attr "type" "atomic")
    (set (attr "length") (const_int 4))])
@@ -125,7 +125,7 @@
     (match_operand:SI 5 "register_operand" "rI")		   ;; not_mask
     (clobber (match_scratch:SI 6 "=&r"))			   ;; tmp_1
     (clobber (match_scratch:SI 7 "=&r"))]			   ;; tmp_2
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
   {
     return "1:\;"
 	   "lr.w%I3\t%0, %1\;"
@@ -144,7 +144,7 @@
    (not:SHORT (and:SHORT (match_operand:SHORT 1 "memory_operand")     ;; mem location
 			 (match_operand:SHORT 2 "reg_or_0_operand"))) ;; value for op
    (match_operand:SI 3 "const_int_operand")]			      ;; model
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
 {
   /* We have no QImode/HImode atomics, so form a mask, then use
      subword_atomic_fetch_strong_nand to implement a LR/SC version of the
@@ -192,7 +192,7 @@
     (match_operand:SI 5 "register_operand" "rI")			  ;; not_mask
     (clobber (match_scratch:SI 6 "=&r"))				  ;; tmp_1
     (clobber (match_scratch:SI 7 "=&r"))]				  ;; tmp_2
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
   {
     return "1:\;"
 	   "lr.w%I3\t%0, %1\;"
@@ -212,7 +212,7 @@
    (any_atomic:SHORT (match_operand:SHORT 1 "memory_operand")	 ;; mem location
 		     (match_operand:SHORT 2 "reg_or_0_operand")) ;; value for op
    (match_operand:SI 3 "const_int_operand")]			 ;; model
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
 {
   /* We have no QImode/HImode atomics, so form a mask, then use
      subword_atomic_fetch_strong_<mode> to implement a LR/SC version of the
@@ -256,7 +256,7 @@
 	  UNSPEC_SYNC_EXCHANGE))
    (set (match_dup 1)
 	(match_operand:GPR 2 "register_operand" "0"))]
-  "TARGET_ATOMIC"
+  "TARGET_ZAAMO"
   "amoswap.<amo>%A3\t%0,%z2,%1"
   [(set_attr "type" "atomic")
    (set (attr "length") (const_int 4))])
@@ -266,7 +266,7 @@
    (match_operand:SHORT 1 "memory_operand")   ;; mem location
    (match_operand:SHORT 2 "register_operand") ;; value
    (match_operand:SI 3 "const_int_operand")]  ;; model
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
 {
   rtx old = gen_reg_rtx (SImode);
   rtx mem = operands[1];
@@ -303,7 +303,7 @@
       UNSPEC_SYNC_EXCHANGE_SUBWORD))
     (match_operand:SI 4 "reg_or_0_operand" "rI")	 ;; not_mask
     (clobber (match_scratch:SI 5 "=&r"))]		 ;; tmp_1
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
   {
     return "1:\;"
 	   "lr.w%I3\t%0, %1\;"
@@ -325,7 +325,7 @@
 			      (match_operand:SI 5 "const_int_operand")] ;; mod_f
 	 UNSPEC_COMPARE_AND_SWAP))
    (clobber (match_scratch:GPR 6 "=&r"))]
-  "TARGET_ATOMIC"
+  "TARGET_ZALRSC"
   {
     enum memmodel model_success = (enum memmodel) INTVAL (operands[4]);
     enum memmodel model_failure = (enum memmodel) INTVAL (operands[5]);
@@ -351,7 +351,7 @@
    (match_operand:SI 5 "const_int_operand" "")  ;; is_weak
    (match_operand:SI 6 "const_int_operand" "")  ;; mod_s
    (match_operand:SI 7 "const_int_operand" "")] ;; mod_f
-  "TARGET_ATOMIC"
+  "TARGET_ZALRSC"
 {
   if (word_mode != <MODE>mode && operands[3] != const0_rtx)
     {
@@ -394,7 +394,7 @@
    (match_operand:SI 5 "const_int_operand")   ;; is_weak
    (match_operand:SI 6 "const_int_operand")   ;; mod_s
    (match_operand:SI 7 "const_int_operand")]  ;; mod_f
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
 {
   emit_insn (gen_atomic_cas_value_strong<mode> (operands[1], operands[2],
 						operands[3], operands[4],
@@ -439,7 +439,7 @@
    (match_operand:SI 4 "const_int_operand")   ;; mod_s
    (match_operand:SI 5 "const_int_operand")   ;; mod_f
    (match_scratch:SHORT 6)]
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
 {
   /* We have no QImode/HImode atomics, so form a mask, then use
      subword_atomic_cas_strong<mode> to implement a LR/SC version of the
@@ -497,7 +497,7 @@
 	(match_operand:SI 5 "register_operand" "rI")			   ;; mask
 	(match_operand:SI 6 "register_operand" "rI")			   ;; not_mask
 	(clobber (match_scratch:SI 7 "=&r"))]				   ;; tmp_1
-  "TARGET_ATOMIC && TARGET_INLINE_SUBWORD_ATOMIC"
+  "TARGET_ZALRSC && TARGET_INLINE_SUBWORD_ATOMIC"
   {
     return "1:\;"
 	   "lr.w%I4\t%0, %1\;"
@@ -516,7 +516,7 @@
   [(match_operand:QI 0 "register_operand" "")    ;; bool output
    (match_operand:QI 1 "memory_operand" "+A")    ;; memory
    (match_operand:SI 2 "const_int_operand" "")]  ;; model
-  "TARGET_ATOMIC"
+  "TARGET_ZALRSC"
 {
   /* We have no QImode atomics, so use the address LSBs to form a mask,
      then use an aligned SImode atomic.  */
diff --git a/gcc/testsuite/gcc.target/riscv/attribute-15.c b/gcc/testsuite/gcc.target/riscv/attribute-15.c
index 59efeb6ea45..a2e394b6489 100644
--- a/gcc/testsuite/gcc.target/riscv/attribute-15.c
+++ b/gcc/testsuite/gcc.target/riscv/attribute-15.c
@@ -3,4 +3,4 @@
 int foo()
 {
 }
-/* { dg-final { scan-assembler ".attribute arch, \"rv32i2p0_m2p0_a2p0_f2p0_d2p0_c2p0\"" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv32i2p0_m2p0_a2p0_f2p0_d2p0_c2p0_zaamo1p0_zalrsc1p0\"" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/attribute-16.c b/gcc/testsuite/gcc.target/riscv/attribute-16.c
index 26f961efb48..d2b18160cb5 100644
--- a/gcc/testsuite/gcc.target/riscv/attribute-16.c
+++ b/gcc/testsuite/gcc.target/riscv/attribute-16.c
@@ -3,4 +3,4 @@
 int foo()
 {
 }
-/* { dg-final { scan-assembler ".attribute arch, \"rv32i2p1_m2p0_a2p0_f2p2_d2p2_c2p0_zicsr2p0" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv32i2p1_m2p0_a2p0_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0\"" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/attribute-17.c b/gcc/testsuite/gcc.target/riscv/attribute-17.c
index 0abff3705d9..fc2f488a3ac 100644
--- a/gcc/testsuite/gcc.target/riscv/attribute-17.c
+++ b/gcc/testsuite/gcc.target/riscv/attribute-17.c
@@ -3,4 +3,4 @@
 int foo()
 {
 }
-/* { dg-final { scan-assembler ".attribute arch, \"rv32i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv32i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0\"" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/attribute-18.c b/gcc/testsuite/gcc.target/riscv/attribute-18.c
index fddbf15fc3e..eefd602103d 100644
--- a/gcc/testsuite/gcc.target/riscv/attribute-18.c
+++ b/gcc/testsuite/gcc.target/riscv/attribute-18.c
@@ -1,4 +1,4 @@
 /* { dg-do compile } */
 /* { dg-options "-mriscv-attribute -march=rv64imafdc -mabi=lp64d -misa-spec=2.2" } */
 int foo() {}
-/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0\"" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p0_m2p0_a2p0_f2p0_d2p0_c2p0_zaamo1p0_zalrsc1p0\"" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/pr110696.c b/gcc/testsuite/gcc.target/riscv/pr110696.c
index a630f04e74f..08682a047e0 100644
--- a/gcc/testsuite/gcc.target/riscv/pr110696.c
+++ b/gcc/testsuite/gcc.target/riscv/pr110696.c
@@ -4,4 +4,4 @@ int foo()
 {
 }
 
-/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl1024b1p0_zvl128b1p0_zvl2048b1p0_zvl256b1p0_zvl32b1p0_zvl4096b1p0_zvl512b1p0_zvl64b1p0\"" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl1024b1p0_zvl128b1p0_zvl2048b1p0_zvl256b1p0_zvl32b1p0_zvl4096b1p0_zvl512b1p0_zvl64b1p0\"" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-1.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-1.c
index b3f1f20fb79..faeb406498d 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-1.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-1.c
@@ -54,5 +54,5 @@ test_3 (int *a, int *b, int *out, unsigned count)
     out[i] = a[i] + b[i];
 }
 
-/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0\"" } } */
-/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0\"" } } */
+/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0" } } */
diff --git a/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-3.c b/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-3.c
index e7af4223d6a..38815ef5bd0 100644
--- a/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-3.c
+++ b/gcc/testsuite/gcc.target/riscv/rvv/base/pr114352-3.c
@@ -107,7 +107,7 @@ test_6 (_Float16 *a, _Float16 *b, _Float16 *out, unsigned count)
     out[i] = a[i] + b[i];
 }
 
-/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0\"" } } */
-/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0" } } */
-/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zbb1p0" } } */
-/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zfh1p0_zfhmin1p0" } } */
+/* { dg-final { scan-assembler ".attribute arch, \"rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0\"" } } */
+/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_v1p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0_zve32f1p0_zve32x1p0_zve64d1p0_zve64f1p0_zve64x1p0_zvl128b1p0_zvl32b1p0_zvl64b1p0" } } */
+/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0_zbb1p0" } } */
+/* { dg-final { scan-assembler ".option arch, rv64i2p1_m2p0_a2p1_f2p2_d2p2_c2p0_zicsr2p0_zifencei2p0_zaamo1p0_zalrsc1p0_zfh1p0_zfhmin1p0" } } */
