diff --git a/gcc/config/aarch64/aarch64-builtins.c b/gcc/config/aarch64/aarch64-builtins.c
index 303e1e542823f01558c5afc3b1015df12737f06d..8cfbb96b3dbdc68ca55a9c205c55a1cee8705636 100644
--- a/gcc/config/aarch64/aarch64-builtins.c
+++ b/gcc/config/aarch64/aarch64-builtins.c
@@ -49,6 +49,7 @@
 #include "gimple-fold.h"
 
 #define v8qi_UP  E_V8QImode
+#define v8di_UP  E_V8DImode
 #define v4hi_UP  E_V4HImode
 #define v4hf_UP  E_V4HFmode
 #define v2si_UP  E_V2SImode
@@ -607,6 +608,11 @@ enum aarch64_builtins
   AARCH64_MEMTAG_BUILTIN_SET_TAG,
   AARCH64_MEMTAG_BUILTIN_GET_TAG,
   AARCH64_MEMTAG_BUILTIN_END,
+  /* LS64 builtins.  */
+  AARCH64_LS64_BUILTIN_LD64B,
+  AARCH64_LS64_BUILTIN_ST64B,
+  AARCH64_LS64_BUILTIN_ST64BV,
+  AARCH64_LS64_BUILTIN_ST64BV0,
   AARCH64_BUILTIN_MAX
 };
 
@@ -1571,6 +1577,70 @@ aarch64_init_memtag_builtins (void)
 #undef AARCH64_INIT_MEMTAG_BUILTINS_DECL
 }
 
+/* Add builtins for Load/store 64 Byte instructions.  */
+
+typedef struct
+{
+  const char *name;
+  unsigned int code;
+  tree type;
+} ls64_builtins_data;
+
+static GTY(()) tree ls64_arm_data_t = NULL_TREE;
+
+static void
+aarch64_init_ls64_builtins_types (void)
+{
+  /* Synthesize:
+
+     typedef struct {
+       uint64_t val[8];
+     } __arm_data512_t;  */
+  const char *tuple_type_name = "__arm_data512_t";
+  tree node_type = get_typenode_from_name (UINT64_TYPE);
+  tree array_type = build_array_type_nelts (node_type, 8);
+  SET_TYPE_MODE (array_type, V8DImode);
+
+  gcc_assert (TYPE_MODE_RAW (array_type) == TYPE_MODE (array_type));
+  gcc_assert (TYPE_ALIGN (array_type) == 64);
+
+  tree field = build_decl (input_location, FIELD_DECL,
+                           get_identifier ("val"), array_type);
+
+  ls64_arm_data_t = lang_hooks.types.simulate_record_decl (input_location,
+                         tuple_type_name,
+                         make_array_slice (&field, 1));
+
+  gcc_assert (TYPE_MODE (ls64_arm_data_t) == V8DImode);
+  gcc_assert (TYPE_MODE_RAW (ls64_arm_data_t) == TYPE_MODE (ls64_arm_data_t));
+  gcc_assert (TYPE_ALIGN (ls64_arm_data_t) == 64);
+}
+
+static void
+aarch64_init_ls64_builtins (void)
+{
+  aarch64_init_ls64_builtins_types ();
+
+  ls64_builtins_data data[4] = {
+    {"__builtin_aarch64_ld64b", AARCH64_LS64_BUILTIN_LD64B,
+     build_function_type_list (ls64_arm_data_t,
+                               const_ptr_type_node, NULL_TREE)},
+    {"__builtin_aarch64_st64b", AARCH64_LS64_BUILTIN_ST64B,
+     build_function_type_list (void_type_node, ptr_type_node,
+                               ls64_arm_data_t, NULL_TREE)},
+    {"__builtin_aarch64_st64bv", AARCH64_LS64_BUILTIN_ST64BV,
+     build_function_type_list (uint64_type_node, ptr_type_node,
+                               ls64_arm_data_t, NULL_TREE)},
+    {"__builtin_aarch64_st64bv0", AARCH64_LS64_BUILTIN_ST64BV0,
+     build_function_type_list (uint64_type_node, ptr_type_node,
+                               ls64_arm_data_t, NULL_TREE)},
+  };
+
+  for (size_t i = 0; i < ARRAY_SIZE (data); ++i)
+    aarch64_builtin_decls[data[i].code]
+      = aarch64_general_add_builtin (data[i].name, data[i].type, data[i].code);
+}
+
 /* Initialize fpsr fpcr getters and setters.  */
 
 static void
@@ -1660,6 +1730,9 @@ aarch64_general_init_builtins (void)
 
   if (TARGET_MEMTAG)
     aarch64_init_memtag_builtins ();
+
+  if (TARGET_LS64)
+    aarch64_init_ls64_builtins ();
 }
 
 /* Implement TARGET_BUILTIN_DECL for the AARCH64_BUILTIN_GENERAL group.  */
@@ -2130,6 +2203,57 @@ aarch64_expand_builtin_tme (int fcode, tree exp, rtx target)
     return target;
 }
 
+/* Function to expand an expression EXP which calls one of the Load/Store
+   64 Byte extension (LS64) builtins FCODE with the result going to TARGET.  */
+static rtx
+aarch64_expand_builtin_ls64 (int fcode, tree exp, rtx target)
+{
+  expand_operand ops[3];
+
+  switch (fcode)
+    {
+    case AARCH64_LS64_BUILTIN_LD64B:
+      {
+        rtx op0 = expand_normal (CALL_EXPR_ARG (exp, 0));
+        create_output_operand (&ops[0], target, V8DImode);
+        create_input_operand (&ops[1], op0, DImode);
+        expand_insn (CODE_FOR_ld64b, 2, ops);
+        return ops[0].value;
+      }
+    case AARCH64_LS64_BUILTIN_ST64B:
+      {
+        rtx op0 = expand_normal (CALL_EXPR_ARG (exp, 0));
+        rtx op1 = expand_normal (CALL_EXPR_ARG (exp, 1));
+        create_output_operand (&ops[0], op0, DImode);
+        create_input_operand (&ops[1], op1, V8DImode);
+        expand_insn (CODE_FOR_st64b, 2, ops);
+        return const0_rtx;
+      }
+    case AARCH64_LS64_BUILTIN_ST64BV:
+      {
+        rtx op0 = expand_normal (CALL_EXPR_ARG (exp, 0));
+        rtx op1 = expand_normal (CALL_EXPR_ARG (exp, 1));
+        create_output_operand (&ops[0], target, DImode);
+        create_input_operand (&ops[1], op0, DImode);
+        create_input_operand (&ops[2], op1, V8DImode);
+        expand_insn (CODE_FOR_st64bv, 3, ops);
+        return ops[0].value;
+      }
+    case AARCH64_LS64_BUILTIN_ST64BV0:
+      {
+        rtx op0 = expand_normal (CALL_EXPR_ARG (exp, 0));
+        rtx op1 = expand_normal (CALL_EXPR_ARG (exp, 1));
+        create_output_operand (&ops[0], target, DImode);
+        create_input_operand (&ops[1], op0, DImode);
+        create_input_operand (&ops[2], op1, V8DImode);
+        expand_insn (CODE_FOR_st64bv0, 3, ops);
+        return ops[0].value;
+      }
+    }
+
+    gcc_unreachable ();
+}
+
 /* Expand a random number builtin EXP with code FCODE, putting the result
    int TARGET.  If IGNORE is true the return value is ignored.  */
 
@@ -2388,6 +2512,12 @@ aarch64_general_expand_builtin (unsigned int fcode, tree exp, rtx target,
       || fcode == AARCH64_TME_BUILTIN_TCANCEL)
     return aarch64_expand_builtin_tme (fcode, exp, target);
 
+  if (fcode == AARCH64_LS64_BUILTIN_LD64B
+      || fcode == AARCH64_LS64_BUILTIN_ST64B
+      || fcode == AARCH64_LS64_BUILTIN_ST64BV
+      || fcode == AARCH64_LS64_BUILTIN_ST64BV0)
+    return aarch64_expand_builtin_ls64 (fcode, exp, target);
+
   if (fcode >= AARCH64_MEMTAG_BUILTIN_START
       && fcode <= AARCH64_MEMTAG_BUILTIN_END)
     return aarch64_expand_builtin_memtag (fcode, exp, target);
diff --git a/gcc/config/aarch64/aarch64-c.c b/gcc/config/aarch64/aarch64-c.c
index d6653e474dec9bcddde2106f36ceb22f1d43375c..3af3e5c96daf674648dbc008b15ade0e303b66f8 100644
--- a/gcc/config/aarch64/aarch64-c.c
+++ b/gcc/config/aarch64/aarch64-c.c
@@ -200,6 +200,8 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
 			"__ARM_FEATURE_BF16_VECTOR_ARITHMETIC", pfile);
   aarch64_def_or_undef (TARGET_BF16_FP,
 			"__ARM_FEATURE_BF16_SCALAR_ARITHMETIC", pfile);
+  aarch64_def_or_undef (TARGET_LS64,
+			"__ARM_FEATURE_LS64", pfile);
 
   /* Not for ACLE, but required to keep "float.h" correct if we switch
      target between implementations that do or do not support ARMv8.2-A
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index 175a9f07e2597b4b6a8d19141b948a8bb796db16..9ebf795a624f0183e0333349d0db7a71ba2d17dd 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -7123,6 +7123,15 @@ (define_expand "mov<mode>"
     }
 })
 
+(define_expand "movv8di"
+  [(set (match_operand:V8DI 0 "nonimmediate_operand")
+	(match_operand:V8DI 1 "general_operand"))]
+  "TARGET_SIMD"
+{
+  if (can_create_pseudo_p () && MEM_P (operands[0]))
+    operands[1] = force_reg (V8DImode, operands[1]);
+})
+
 (define_expand "aarch64_ld1x3<vstruct_elt>"
   [(match_operand:VSTRUCT_3QD 0 "register_operand")
    (match_operand:DI 1 "register_operand")]
@@ -7253,6 +7262,17 @@ (define_insn "*aarch64_mov<mode>"
    (set_attr "length" "<insn_count>,4,4")]
 )
 
+(define_insn "*aarch64_movv8di"
+  [(set (match_operand:V8DI 0 "nonimmediate_operand" "=r,m,r")
+	(match_operand:V8DI 1 "general_operand" " r,r,m"))]
+  "!BYTES_BIG_ENDIAN
+   && (register_operand (operands[0], V8DImode)
+       || register_operand (operands[1], V8DImode))"
+  "#"
+  [(set_attr "type" "multiple,multiple,multiple")
+   (set_attr "length" "32,16,16")]
+)
+
 (define_insn "aarch64_be_ld1<mode>"
   [(set (match_operand:VALLDI_F16 0	"register_operand" "=w")
 	(unspec:VALLDI_F16 [(match_operand:VALLDI_F16 1
@@ -7496,6 +7516,34 @@ (define_split
     FAIL;
 })
 
+(define_split
+  [(set (match_operand:V8DI 0 "nonimmediate_operand")
+        (match_operand:V8DI 1 "general_operand"))]
+  "TARGET_SIMD && reload_completed"
+  [(const_int 0)]
+{
+  if (register_operand (operands[0], V8DImode)
+      && register_operand (operands[1], V8DImode))
+    {
+      aarch64_simd_emit_reg_reg_move (operands, DImode, 8);
+      DONE;
+    }
+  else if ((register_operand (operands[0], V8DImode)
+            && memory_operand (operands[1], V8DImode))
+           || (memory_operand (operands[0], V8DImode)
+            && register_operand (operands[1], V8DImode)))
+    {
+      for (int offset = 0; offset < 64; offset += 16)
+        emit_move_insn (simplify_gen_subreg (TImode, operands[0],
+                                             V8DImode, offset),
+                        simplify_gen_subreg (TImode, operands[1],
+                                             V8DImode, offset));
+      DONE;
+    }
+  else
+    FAIL;
+})
+
 (define_expand "aarch64_ld<nregs>r<vstruct_elt>"
   [(match_operand:VSTRUCT_QD 0 "register_operand")
    (match_operand:DI 1 "register_operand")]
diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index 2792bb29adbbb5b3145b3f767615af8edbc30b08..affd2ec8d2c68c54024979dbc8aaf1b72cf0d32c 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -310,6 +310,7 @@ extern unsigned aarch64_architecture_version;
 #define AARCH64_ISA_V8_R	   (aarch64_isa_flags & AARCH64_FL_V8_R)
 #define AARCH64_ISA_PAUTH	   (aarch64_isa_flags & AARCH64_FL_PAUTH)
 #define AARCH64_ISA_V9		   (aarch64_isa_flags & AARCH64_FL_V9)
+#define AARCH64_ISA_LS64	   (aarch64_isa_flags & AARCH64_FL_LS64)
 
 /* Crypto is an optional extension to AdvSIMD.  */
 #define TARGET_CRYPTO (TARGET_SIMD && AARCH64_ISA_CRYPTO)
@@ -401,6 +402,9 @@ extern unsigned aarch64_architecture_version;
 /* PAUTH instructions are enabled through +pauth.  */
 #define TARGET_PAUTH (AARCH64_ISA_PAUTH)
 
+/* LS64 instructions are enabled through +ls64.  */
+#define TARGET_LS64 (AARCH64_ISA_LS64)
+
 /* Make sure this is always defined so we don't have to check for ifdefs
    but rather use normal ifs.  */
 #ifndef TARGET_FIX_ERR_A53_835769_DEFAULT
diff --git a/gcc/config/aarch64/aarch64.c b/gcc/config/aarch64/aarch64.c
index be24b7320d28deed9a19a0451c96bd67d2fb3104..e0ceba68968a28a9fcf1ba6e3a3036783b0931b0 100644
--- a/gcc/config/aarch64/aarch64.c
+++ b/gcc/config/aarch64/aarch64.c
@@ -10013,8 +10013,12 @@ aarch64_classify_address (struct aarch64_address_info *info,
 	     instruction memory accesses.  */
 	  if (mode == TImode || mode == TFmode)
 	    return (aarch64_offset_7bit_signed_scaled_p (DImode, offset)
-		    && (aarch64_offset_9bit_signed_unscaled_p (mode, offset)
-			|| offset_12bit_unsigned_scaled_p (mode, offset)));
+	            && (aarch64_offset_9bit_signed_unscaled_p (mode, offset)
+	            || offset_12bit_unsigned_scaled_p (mode, offset)));
+
+	  if (mode == V8DImode)
+	    return (aarch64_offset_7bit_signed_scaled_p (DImode, offset)
+	            && aarch64_offset_7bit_signed_scaled_p (DImode, offset + 48));
 
 	  /* A 7bit offset check because OImode will emit a ldp/stp
 	     instruction (only big endian will get here).
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 5297b2d3f95744ac72e36814c6676cc97478d48b..4fd53156206b5d8a6b8d09bc4e4f01d8b3453f10 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -187,6 +187,12 @@ (define_c_enum "unspec" [
     UNSPEC_LD2_LANE
     UNSPEC_LD3_LANE
     UNSPEC_LD4_LANE
+    UNSPEC_LD64B
+    UNSPEC_ST64B
+    UNSPEC_ST64BV
+    UNSPEC_ST64BV_RET
+    UNSPEC_ST64BV0
+    UNSPEC_ST64BV0_RET
     UNSPEC_MB
     UNSPEC_NOP
     UNSPEC_PACIA1716
@@ -7499,6 +7505,52 @@ (define_insn "stg"
   [(set_attr "type" "memtag")]
 )
 
+;; Load/Store 64-bit (LS64) instructions.
+(define_insn "ld64b"
+  [(set (match_operand:V8DI 0 "register_operand" "=r")
+        (unspec_volatile:V8DI
+          [(mem:V8DI (match_operand:DI 1 "register_operand" "r"))]
+            UNSPEC_LD64B)
+  )]
+  "TARGET_LS64"
+  "ld64b\\t%0, [%1]"
+  [(set_attr "type" "ls64")]
+)
+
+(define_insn "st64b"
+  [(set (mem:V8DI (match_operand:DI 0 "register_operand" "=r"))
+        (unspec_volatile:V8DI [(match_operand:V8DI 1 "register_operand" "r")]
+            UNSPEC_ST64B)
+  )]
+  "TARGET_LS64"
+  "st64b\\t%1, [%0]"
+  [(set_attr "type" "ls64")]
+)
+
+(define_insn "st64bv"
+  [(set (match_operand:DI 0 "register_operand" "=r")
+        (unspec_volatile:DI [(const_int 0)] UNSPEC_ST64BV_RET))
+   (set (mem:V8DI (match_operand:DI 1 "register_operand" "r"))
+        (unspec_volatile:V8DI [(match_operand:V8DI 2 "register_operand" "r")]
+            UNSPEC_ST64BV)
+  )]
+  "TARGET_LS64"
+  "st64bv\\t%0, %2, [%1]"
+  [(set_attr "type" "ls64")]
+)
+
+(define_insn "st64bv0"
+  [(set (match_operand:DI 0 "register_operand" "=r")
+        (unspec_volatile:DI [(const_int 0)] UNSPEC_ST64BV0_RET))
+   (set (mem:V8DI (match_operand:DI 1 "register_operand" "r"))
+        (unspec_volatile:V8DI [(match_operand:V8DI 2 "register_operand" "r")]
+            UNSPEC_ST64BV0)
+  )]
+  "TARGET_LS64"
+  "st64bv0\\t%0, %2, [%1]"
+  [(set_attr "type" "ls64")]
+)
+
 ;; AdvSIMD Stuff
 (include "aarch64-simd.md")
 
diff --git a/gcc/config/aarch64/arm_acle.h b/gcc/config/aarch64/arm_acle.h
index 13f23632474b260122f30a3c566033664b0b5963..030e343490f14e3e7e394e63bb4ab6df13cda177 100644
--- a/gcc/config/aarch64/arm_acle.h
+++ b/gcc/config/aarch64/arm_acle.h
@@ -214,6 +214,43 @@ __ttest (void)
 #pragma GCC pop_options
 #endif
 
+#ifdef __ARM_FEATURE_LS64
+#pragma GCC push_options
+#pragma GCC target ("+nothing+ls64")
+
+typedef __arm_data512_t data512_t;
+
+__extension__ extern __inline data512_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+__arm_ld64b (const void *__addr)
+{
+  return __builtin_aarch64_ld64b (__addr);
+}
+
+__extension__ extern __inline void
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+__arm_st64b (void *__addr, data512_t __value)
+{
+  __builtin_aarch64_st64b (__addr, __value);
+}
+
+__extension__ extern __inline uint64_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+__arm_st64bv (void *__addr, data512_t __value)
+{
+  return __builtin_aarch64_st64bv (__addr, __value);
+}
+
+__extension__ extern __inline uint64_t
+__attribute__ ((__always_inline__, __gnu_inline__, __artificial__))
+__arm_st64bv0 (void *__addr, data512_t __value)
+{
+  return __builtin_aarch64_st64bv0 (__addr, __value);
+}
+
+#pragma GCC pop_options
+#endif
+
 #pragma GCC push_options
 #pragma GCC target ("+nothing+rng")
 __extension__ extern __inline int
diff --git a/gcc/config/arm/types.md b/gcc/config/arm/types.md
index b9514dafb86a280bee3d3f84845e0743cd18a34d..6dce71fd27e5dfbd08746509bc6fdeeade69a4a4 100644
--- a/gcc/config/arm/types.md
+++ b/gcc/config/arm/types.md
@@ -1122,6 +1122,7 @@ (define_attr "type"
   coproc,\
   tme,\
   memtag,\
+  ls64,\
   mve_move,\
   mve_store,\
   mve_load"
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_asm.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_asm.c
new file mode 100644
index 0000000000000000000000000000000000000000..ba9960c9a3c40bb980342b58c11e44455696a75a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_asm.c
@@ -0,0 +1,58 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+/* Inline assembly for LS64 instructions.  */
+
+#include <arm_acle.h>
+
+void
+ls64_load (data512_t *output, const void *addr)
+{
+    __asm__ volatile ("ld64b %0, [%1]"
+                      : "=r" (*output)
+                      : "r" (addr)
+                      : "memory");
+}
+
+/* { dg-final { scan-assembler-times {ld64b } 1 } } */
+
+void
+ls64_store (const data512_t *input, void *addr)
+{
+    __asm__ volatile ("st64b %1, [%0]"
+                      : /* No outputs.  */
+                      : "r" (addr), "r" (*input)
+                      : "memory");
+}
+
+/* { dg-final { scan-assembler-times {st64b } 1 } } */
+
+uint64_t
+ls64_store_v (const data512_t *input, void *addr)
+{
+    uint64_t status;
+    __asm__ volatile ("st64bv %0, %2, [%1]"
+                      : "=r" (status)
+                      : "r" (addr), "r" (*input)
+                      : "memory");
+    return status;
+}
+
+/* { dg-final { scan-assembler-times {st64bv } 1 } } */
+
+uint64_t
+ls64_store_v0 (const data512_t *input, void *addr)
+{
+    uint64_t status;
+    __asm__ volatile ("st64bv0 %0, %2, [%1]"
+                      : "=r" (status)
+                      : "r" (addr), "r" (*input)
+                      : "memory");
+    return status;
+}
+
+/* { dg-final { scan-assembler-times {st64bv0 } 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b-2.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..2a94657a31afada0eb60252bbd3c9f3d43b8c879
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b-2.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func (const void * addr) {
+    data512_t ret = __arm_ld64b (addr);
+}
+
+/* { dg-final { scan-assembler-times {ld64b\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b-3.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b-3.c
new file mode 100644
index 0000000000000000000000000000000000000000..155ea401f23870e023866e3a92f75da66f4fa9fc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b-3.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(const void * addr, data512_t *data) {
+  *data = __arm_ld64b (addr);
+}
+
+/* { dg-final { scan-assembler-times {ld64b\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b.c
new file mode 100644
index 0000000000000000000000000000000000000000..e3fc1411221e9a58051fa2147f8a744733e6c233
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld64b.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+data512_t
+func(const void * addr) {
+  return __arm_ld64b (addr);
+}
+
+/* { dg-final { scan-assembler-times {ld64b\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld_st_o0.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld_st_o0.c
new file mode 100644
index 0000000000000000000000000000000000000000..550d75c8e0b4f4168b609c6c16554470ea7fc8c5
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_ld_st_o0.c
@@ -0,0 +1,30 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O0" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+/* Make sure no issues when compile with -O0.  */
+
+data512_t
+func1 (const void * addr) {
+  return __arm_ld64b (addr);
+}
+
+void
+func2 (void *addr, data512_t value) {
+    __arm_st64b (addr, value);
+}
+
+uint64_t
+func3 (void *addr, data512_t value) {
+    return  __arm_st64bv (addr, value);
+}
+
+uint64_t
+func4 (void *addr, data512_t value) {
+    return __arm_st64bv0 (addr, value);
+}
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64b-2.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64b-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..bfd737b86c6fcaa1ef57f86afcfec1bdbf4f7422
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64b-2.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(void *addr, data512_t *value) {
+    __arm_st64b (addr, *value);
+}
+
+/* { dg-final { scan-assembler-times {st64b\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64b.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64b.c
new file mode 100644
index 0000000000000000000000000000000000000000..75b91803eefb5024ca1bb0f5c62dd1381aeb5fdc
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64b.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(void *addr, data512_t value) {
+    __arm_st64b (addr, value);
+}
+
+/* { dg-final { scan-assembler-times {st64b\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv-2.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..c3ef83e57eb8d710425da48c48b9328d52ecc9bd
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv-2.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(void *addr, data512_t value) {
+    __arm_st64bv (addr, value);
+}
+
+/* { dg-final { scan-assembler-times {st64bv\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv-3.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv-3.c
new file mode 100644
index 0000000000000000000000000000000000000000..370db7960ec907a722c9e676494a0ee46e0b7d25
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv-3.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(void *addr, data512_t *value) {
+    __arm_st64bv (addr, *value);
+}
+
+/* { dg-final { scan-assembler-times {st64bv\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv.c
new file mode 100644
index 0000000000000000000000000000000000000000..52ef9c4593109c2547ff5f0d86379b04b2f4cd40
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+uint64_t
+func(void *addr, data512_t value) {
+    return  __arm_st64bv (addr, value);
+}
+
+/* { dg-final { scan-assembler-times {st64bv\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0-2.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0-2.c
new file mode 100644
index 0000000000000000000000000000000000000000..c49fa56d94075aa252a3299c80eeb8adac41f699
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0-2.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(void *addr, data512_t value) {
+    __arm_st64bv0 (addr, value);
+}
+
+/* { dg-final { scan-assembler-times {st64bv0\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0-3.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0-3.c
new file mode 100644
index 0000000000000000000000000000000000000000..af6917c795f8b96b1090eca7f06bdf5caaf16ed4
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0-3.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+void
+func(void *addr, data512_t *value) {
+    __arm_st64bv0 (addr, *value);
+}
+
+/* { dg-final { scan-assembler-times {st64bv0\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0.c b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0.c
new file mode 100644
index 0000000000000000000000000000000000000000..bce10ae3653b7f6cd366c94a2b8dfa71fdfaca70
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/acle/ls64_st64bv0.c
@@ -0,0 +1,15 @@
+/* { dg-do compile } */
+/* { dg-options "-march=armv8-a+ls64 -O2" } */
+
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+
+#include <arm_acle.h>
+
+uint64_t
+func(void *addr, data512_t value) {
+    return __arm_st64bv0 (addr, value);
+}
+
+/* { dg-final { scan-assembler-times {st64bv0\t} 1 } } */
diff --git a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_2.c b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_2.c
index 7244359ccfb9cbcbbd8285b050113c004a6af2a6..2d76bfc23dfdcd78a74ec0e4845a3bd8d110b010 100644
--- a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_2.c
+++ b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_2.c
@@ -240,6 +240,20 @@
 #endif
 #pragma GCC pop_options
 
+#pragma GCC push_options
+#pragma GCC target ("arch=armv8.7-a")
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+#pragma GCC pop_options
+
+#pragma GCC push_options
+#pragma GCC target ("arch=armv8.7-a+ls64")
+#ifndef __ARM_FEATURE_LS64
+#error "__ARM_FEATURE_LS64 is not defined but should be!"
+#endif
+#pragma GCC pop_options
+
 #pragma GCC pop_options
 
 int