[libc][NFC] Move aligned access implementations to separate header

Follow up on https://reviews.llvm.org/D154770

Differential Revision: https://reviews.llvm.org/D154800

libc/src/string/memory_utils/CMakeLists.txt

@@ -6,6 +6,7 @@ add_header_library(
     aarch64/memcpy_implementations.h
     bcmp_implementations.h
     bzero_implementations.h
+    generic/aligned_access.h
     generic/byte_per_byte.h
     memcmp_implementations.h
     memcpy_implementations.h

libc/src/string/memory_utils/bcmp_implementations.h

@@ -12,6 +12,7 @@
 #include "src/__support/common.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY LIBC_LOOP_NOUNROLL
 #include "src/__support/macros/properties/architectures.h"
+#include "src/string/memory_utils/generic/aligned_access.h"
 #include "src/string/memory_utils/generic/byte_per_byte.h"
 #include "src/string/memory_utils/op_aarch64.h"
 #include "src/string/memory_utils/op_builtin.h"
@@ -23,59 +24,6 @@
 
 namespace __llvm_libc {
 
-[[maybe_unused]] LIBC_INLINE BcmpReturnType
-inline_bcmp_aligned_access_64bit(CPtr p1, CPtr p2, size_t count) {
-  constexpr size_t kAlign = sizeof(uint64_t);
-  if (count <= 2 * kAlign)
-    return inline_bcmp_byte_per_byte(p1, p2, count);
-  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
-  if (auto value = inline_bcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
-    return value;
-  size_t offset = bytes_to_p1_align;
-  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
-  for (; offset < count - kAlign; offset += kAlign) {
-    uint64_t a;
-    if (p2_alignment == 0)
-      a = load64_aligned<uint64_t>(p2, offset);
-    else if (p2_alignment == 4)
-      a = load64_aligned<uint32_t, uint32_t>(p2, offset);
-    else if (p2_alignment == 2)
-      a = load64_aligned<uint16_t, uint16_t, uint16_t, uint16_t>(p2, offset);
-    else
-      a = load64_aligned<uint8_t, uint16_t, uint16_t, uint16_t, uint8_t>(
-          p2, offset);
-    uint64_t b = load64_aligned<uint64_t>(p1, offset);
-    if (a != b)
-      return BcmpReturnType::NONZERO();
-  }
-  return inline_bcmp_byte_per_byte(p1, p2, count, offset);
-}
-
-[[maybe_unused]] LIBC_INLINE BcmpReturnType
-inline_bcmp_aligned_access_32bit(CPtr p1, CPtr p2, size_t count) {
-  constexpr size_t kAlign = sizeof(uint32_t);
-  if (count <= 2 * kAlign)
-    return inline_bcmp_byte_per_byte(p1, p2, count);
-  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
-  if (auto value = inline_bcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
-    return value;
-  size_t offset = bytes_to_p1_align;
-  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
-  for (; offset < count - kAlign; offset += kAlign) {
-    uint32_t a;
-    if (p2_alignment == 0)
-      a = load32_aligned<uint32_t>(p2, offset);
-    else if (p2_alignment == 2)
-      a = load32_aligned<uint16_t, uint16_t>(p2, offset);
-    else
-      a = load32_aligned<uint8_t, uint16_t, uint8_t>(p2, offset);
-    uint32_t b = load32_aligned<uint32_t>(p1, offset);
-    if (a != b)
-      return BcmpReturnType::NONZERO();
-  }
-  return inline_bcmp_byte_per_byte(p1, p2, count, offset);
-}
-
 #if defined(LIBC_TARGET_ARCH_IS_X86) || defined(LIBC_TARGET_ARCH_IS_AARCH64)
 [[maybe_unused]] LIBC_INLINE BcmpReturnType
 inline_bcmp_generic_gt16(CPtr p1, CPtr p2, size_t count) {

libc/src/string/memory_utils/generic/aligned_access.h

@@ -0,0 +1,205 @@
+//===-- Implementations for platform with mandatory aligned memory access -===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// For some platforms, unaligned loads and stores are either illegal or very
+// slow. The implementations in this file make sure all loads and stores are
+// always aligned.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_GENERIC_ALIGNED_ACCESS_H
+#define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_GENERIC_ALIGNED_ACCESS_H
+
+#include "src/__support/macros/config.h" // LIBC_INLINE
+#include "src/string/memory_utils/generic/byte_per_byte.h"
+#include "src/string/memory_utils/op_generic.h" // generic::splat
+#include "src/string/memory_utils/utils.h"      // Ptr, CPtr
+
+#include <stddef.h> // size_t
+
+namespace __llvm_libc {
+
+[[maybe_unused]] LIBC_INLINE uint32_t load32_aligned(CPtr ptr, size_t offset,
+                                                     size_t alignment) {
+  if (alignment == 0)
+    return load32_aligned<uint32_t>(ptr, offset);
+  else if (alignment == 2)
+    return load32_aligned<uint16_t, uint16_t>(ptr, offset);
+  else
+    return load32_aligned<uint8_t, uint16_t, uint8_t>(ptr, offset);
+}
+
+[[maybe_unused]] LIBC_INLINE uint64_t load64_aligned(CPtr ptr, size_t offset,
+                                                     size_t alignment) {
+  if (alignment == 0)
+    return load64_aligned<uint64_t>(ptr, offset);
+  else if (alignment == 4)
+    return load64_aligned<uint32_t, uint32_t>(ptr, offset);
+  else if (alignment == 2)
+    return load64_aligned<uint16_t, uint16_t, uint16_t, uint16_t>(ptr, offset);
+  else
+    return load64_aligned<uint8_t, uint16_t, uint16_t, uint16_t, uint8_t>(
+        ptr, offset);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// memcpy
+///////////////////////////////////////////////////////////////////////////////
+
+[[maybe_unused]] LIBC_INLINE void
+inline_memcpy_aligned_access_32bit(Ptr __restrict dst, CPtr __restrict src,
+                                   size_t count) {
+  constexpr size_t kAlign = sizeof(uint32_t);
+  if (count <= 2 * kAlign)
+    return inline_memcpy_byte_per_byte(dst, src, count);
+  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
+  inline_memcpy_byte_per_byte(dst, src, bytes_to_dst_align);
+  size_t offset = bytes_to_dst_align;
+  size_t src_alignment = distance_to_align_down<kAlign>(src + offset);
+  for (; offset < count - kAlign; offset += kAlign) {
+    uint32_t value = load32_aligned(src, offset, src_alignment);
+    store32_aligned<uint32_t>(value, dst, offset);
+  }
+  // remainder
+  inline_memcpy_byte_per_byte(dst, src, count, offset);
+}
+
+[[maybe_unused]] LIBC_INLINE void
+inline_memcpy_aligned_access_64bit(Ptr __restrict dst, CPtr __restrict src,
+                                   size_t count) {
+  constexpr size_t kAlign = sizeof(uint64_t);
+  if (count <= 2 * kAlign)
+    return inline_memcpy_byte_per_byte(dst, src, count);
+  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
+  inline_memcpy_byte_per_byte(dst, src, bytes_to_dst_align);
+  size_t offset = bytes_to_dst_align;
+  size_t src_alignment = distance_to_align_down<kAlign>(src + offset);
+  for (; offset < count - kAlign; offset += kAlign) {
+    uint64_t value = load64_aligned(src, offset, src_alignment);
+    store64_aligned<uint64_t>(value, dst, offset);
+  }
+  // remainder
+  inline_memcpy_byte_per_byte(dst, src, count, offset);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// memset
+///////////////////////////////////////////////////////////////////////////////
+
+[[maybe_unused]] LIBC_INLINE static void
+inline_memset_aligned_access_32bit(Ptr dst, uint8_t value, size_t count) {
+  constexpr size_t kAlign = sizeof(uint32_t);
+  if (count <= 2 * kAlign)
+    return inline_memset_byte_per_byte(dst, value, count);
+  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
+  inline_memset_byte_per_byte(dst, value, bytes_to_dst_align);
+  size_t offset = bytes_to_dst_align;
+  for (; offset < count - kAlign; offset += kAlign)
+    store32_aligned<uint32_t>(generic::splat<uint32_t>(value), dst, offset);
+  inline_memset_byte_per_byte(dst, value, count, offset);
+}
+
+[[maybe_unused]] LIBC_INLINE static void
+inline_memset_aligned_access_64bit(Ptr dst, uint8_t value, size_t count) {
+  constexpr size_t kAlign = sizeof(uint64_t);
+  if (count <= 2 * kAlign)
+    return inline_memset_byte_per_byte(dst, value, count);
+  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
+  inline_memset_byte_per_byte(dst, value, bytes_to_dst_align);
+  size_t offset = bytes_to_dst_align;
+  for (; offset < count - kAlign; offset += kAlign)
+    store64_aligned<uint64_t>(generic::splat<uint64_t>(value), dst, offset);
+  inline_memset_byte_per_byte(dst, value, count, offset);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// bcmp
+///////////////////////////////////////////////////////////////////////////////
+
+[[maybe_unused]] LIBC_INLINE BcmpReturnType
+inline_bcmp_aligned_access_32bit(CPtr p1, CPtr p2, size_t count) {
+  constexpr size_t kAlign = sizeof(uint32_t);
+  if (count <= 2 * kAlign)
+    return inline_bcmp_byte_per_byte(p1, p2, count);
+  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
+  if (auto value = inline_bcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
+    return value;
+  size_t offset = bytes_to_p1_align;
+  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
+  for (; offset < count - kAlign; offset += kAlign) {
+    uint32_t a = load32_aligned<uint32_t>(p1, offset);
+    uint32_t b = load32_aligned(p2, offset, p2_alignment);
+    if (a != b)
+      return BcmpReturnType::NONZERO();
+  }
+  return inline_bcmp_byte_per_byte(p1, p2, count, offset);
+}
+
+[[maybe_unused]] LIBC_INLINE BcmpReturnType
+inline_bcmp_aligned_access_64bit(CPtr p1, CPtr p2, size_t count) {
+  constexpr size_t kAlign = sizeof(uint64_t);
+  if (count <= 2 * kAlign)
+    return inline_bcmp_byte_per_byte(p1, p2, count);
+  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
+  if (auto value = inline_bcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
+    return value;
+  size_t offset = bytes_to_p1_align;
+  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
+  for (; offset < count - kAlign; offset += kAlign) {
+    uint64_t a = load64_aligned<uint64_t>(p1, offset);
+    uint64_t b = load64_aligned(p2, offset, p2_alignment);
+    if (a != b)
+      return BcmpReturnType::NONZERO();
+  }
+  return inline_bcmp_byte_per_byte(p1, p2, count, offset);
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// memcmp
+///////////////////////////////////////////////////////////////////////////////
+
+[[maybe_unused]] LIBC_INLINE MemcmpReturnType
+inline_memcmp_aligned_access_32bit(CPtr p1, CPtr p2, size_t count) {
+  constexpr size_t kAlign = sizeof(uint32_t);
+  if (count <= 2 * kAlign)
+    return inline_memcmp_byte_per_byte(p1, p2, count);
+  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
+  if (auto value = inline_memcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
+    return value;
+  size_t offset = bytes_to_p1_align;
+  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
+  for (; offset < count - kAlign; offset += kAlign) {
+    uint32_t a = load32_aligned<uint32_t>(p1, offset);
+    uint32_t b = load32_aligned(p2, offset, p2_alignment);
+    if (a != b)
+      return cmp_uint32_t(Endian::to_big_endian(a), Endian::to_big_endian(b));
+  }
+  return inline_memcmp_byte_per_byte(p1, p2, count, offset);
+}
+
+[[maybe_unused]] LIBC_INLINE MemcmpReturnType
+inline_memcmp_aligned_access_64bit(CPtr p1, CPtr p2, size_t count) {
+  constexpr size_t kAlign = sizeof(uint64_t);
+  if (count <= 2 * kAlign)
+    return inline_memcmp_byte_per_byte(p1, p2, count);
+  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
+  if (auto value = inline_memcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
+    return value;
+  size_t offset = bytes_to_p1_align;
+  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
+  for (; offset < count - kAlign; offset += kAlign) {
+    uint64_t a = load64_aligned<uint64_t>(p1, offset);
+    uint64_t b = load64_aligned(p2, offset, p2_alignment);
+    if (a != b)
+      return cmp_neq_uint64_t(Endian::to_big_endian(a),
+                              Endian::to_big_endian(b));
+  }
+  return inline_memcmp_byte_per_byte(p1, p2, count, offset);
+}
+
+} // namespace __llvm_libc
+
+#endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_GENERIC_ALIGNED_ACCESS_H

libc/src/string/memory_utils/memcmp_implementations.h

@@ -12,6 +12,7 @@
 #include "src/__support/common.h"
 #include "src/__support/macros/optimization.h" // LIBC_UNLIKELY LIBC_LOOP_NOUNROLL
 #include "src/__support/macros/properties/architectures.h"
+#include "src/string/memory_utils/generic/aligned_access.h"
 #include "src/string/memory_utils/generic/byte_per_byte.h"
 #include "src/string/memory_utils/op_generic.h"
 #include "src/string/memory_utils/op_riscv.h"
@@ -27,60 +28,6 @@
 
 namespace __llvm_libc {
 
-[[maybe_unused]] LIBC_INLINE MemcmpReturnType
-inline_memcmp_aligned_access_64bit(CPtr p1, CPtr p2, size_t count) {
-  constexpr size_t kAlign = sizeof(uint64_t);
-  if (count <= 2 * kAlign)
-    return inline_memcmp_byte_per_byte(p1, p2, count);
-  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
-  if (auto value = inline_memcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
-    return value;
-  size_t offset = bytes_to_p1_align;
-  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
-  for (; offset < count - kAlign; offset += kAlign) {
-    uint64_t b;
-    if (p2_alignment == 0)
-      b = load64_aligned<uint64_t>(p2, offset);
-    else if (p2_alignment == 4)
-      b = load64_aligned<uint32_t, uint32_t>(p2, offset);
-    else if (p2_alignment == 2)
-      b = load64_aligned<uint16_t, uint16_t, uint16_t, uint16_t>(p2, offset);
-    else
-      b = load64_aligned<uint8_t, uint16_t, uint16_t, uint16_t, uint8_t>(
-          p2, offset);
-    uint64_t a = load64_aligned<uint64_t>(p1, offset);
-    if (a != b)
-      return cmp_neq_uint64_t(Endian::to_big_endian(a),
-                              Endian::to_big_endian(b));
-  }
-  return inline_memcmp_byte_per_byte(p1, p2, count, offset);
-}
-
-[[maybe_unused]] LIBC_INLINE MemcmpReturnType
-inline_memcmp_aligned_access_32bit(CPtr p1, CPtr p2, size_t count) {
-  constexpr size_t kAlign = sizeof(uint32_t);
-  if (count <= 2 * kAlign)
-    return inline_memcmp_byte_per_byte(p1, p2, count);
-  size_t bytes_to_p1_align = distance_to_align_up<kAlign>(p1);
-  if (auto value = inline_memcmp_byte_per_byte(p1, p2, bytes_to_p1_align))
-    return value;
-  size_t offset = bytes_to_p1_align;
-  size_t p2_alignment = distance_to_align_down<kAlign>(p2 + offset);
-  for (; offset < count - kAlign; offset += kAlign) {
-    uint32_t b;
-    if (p2_alignment == 0)
-      b = load32_aligned<uint32_t>(p2, offset);
-    else if (p2_alignment == 2)
-      b = load32_aligned<uint16_t, uint16_t>(p2, offset);
-    else
-      b = load32_aligned<uint8_t, uint16_t, uint8_t>(p2, offset);
-    uint32_t a = load32_aligned<uint32_t>(p1, offset);
-    if (a != b)
-      return cmp_uint32_t(Endian::to_big_endian(a), Endian::to_big_endian(b));
-  }
-  return inline_memcmp_byte_per_byte(p1, p2, count, offset);
-}
-
 LIBC_INLINE MemcmpReturnType inline_memcmp(CPtr p1, CPtr p2, size_t count) {
 #if defined(LIBC_TARGET_ARCH_IS_X86)
   return inline_memcmp_x86(p1, p2, count);

libc/src/string/memory_utils/memcpy_implementations.h

@@ -12,6 +12,7 @@
 #include "src/__support/macros/config.h"       // LIBC_INLINE
 #include "src/__support/macros/optimization.h" // LIBC_LOOP_NOUNROLL
 #include "src/__support/macros/properties/architectures.h"
+#include "src/string/memory_utils/generic/aligned_access.h"
 #include "src/string/memory_utils/generic/byte_per_byte.h"
 #include "src/string/memory_utils/op_builtin.h"
 #include "src/string/memory_utils/utils.h"
@@ -26,58 +27,6 @@
 
 namespace __llvm_libc {
 
-[[maybe_unused]] LIBC_INLINE void
-inline_memcpy_aligned_access_32bit(Ptr __restrict dst, CPtr __restrict src,
-                                   size_t count) {
-  constexpr size_t kAlign = sizeof(uint32_t);
-  if (count <= 2 * kAlign)
-    return inline_memcpy_byte_per_byte(dst, src, count);
-  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
-  inline_memcpy_byte_per_byte(dst, src, bytes_to_dst_align);
-  size_t offset = bytes_to_dst_align;
-  size_t src_alignment = distance_to_align_down<kAlign>(src + offset);
-  for (; offset < count - kAlign; offset += kAlign) {
-    uint32_t value;
-    if (src_alignment == 0)
-      value = load32_aligned<uint32_t>(src, offset);
-    else if (src_alignment == 2)
-      value = load32_aligned<uint16_t, uint16_t>(src, offset);
-    else
-      value = load32_aligned<uint8_t, uint16_t, uint8_t>(src, offset);
-    store32_aligned<uint32_t>(value, dst, offset);
-  }
-  // remainder
-  inline_memcpy_byte_per_byte(dst, src, count, offset);
-}
-
-[[maybe_unused]] LIBC_INLINE void
-inline_memcpy_aligned_access_64bit(Ptr __restrict dst, CPtr __restrict src,
-                                   size_t count) {
-  constexpr size_t kAlign = sizeof(uint64_t);
-  if (count <= 2 * kAlign)
-    return inline_memcpy_byte_per_byte(dst, src, count);
-  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
-  inline_memcpy_byte_per_byte(dst, src, bytes_to_dst_align);
-  size_t offset = bytes_to_dst_align;
-  size_t src_alignment = distance_to_align_down<kAlign>(src + offset);
-  for (; offset < count - kAlign; offset += kAlign) {
-    uint64_t value;
-    if (src_alignment == 0)
-      value = load64_aligned<uint64_t>(src, offset);
-    else if (src_alignment == 4)
-      value = load64_aligned<uint32_t, uint32_t>(src, offset);
-    else if (src_alignment == 2)
-      value =
-          load64_aligned<uint16_t, uint16_t, uint16_t, uint16_t>(src, offset);
-    else
-      value = load64_aligned<uint8_t, uint16_t, uint16_t, uint16_t, uint8_t>(
-          src, offset);
-    store64_aligned<uint64_t>(value, dst, offset);
-  }
-  // remainder
-  inline_memcpy_byte_per_byte(dst, src, count, offset);
-}
-
 LIBC_INLINE void inline_memcpy(Ptr __restrict dst, CPtr __restrict src,
                                size_t count) {
   using namespace __llvm_libc::builtin;

libc/src/string/memory_utils/memset_implementations.h

@@ -12,6 +12,7 @@
 #include "src/__support/common.h"
 #include "src/__support/macros/optimization.h"
 #include "src/__support/macros/properties/architectures.h"
+#include "src/string/memory_utils/generic/aligned_access.h"
 #include "src/string/memory_utils/generic/byte_per_byte.h"
 #include "src/string/memory_utils/op_aarch64.h"
 #include "src/string/memory_utils/op_builtin.h"
@@ -23,32 +24,6 @@
 
 namespace __llvm_libc {
 
-[[maybe_unused]] LIBC_INLINE static void
-inline_memset_aligned_access_32bit(Ptr dst, uint8_t value, size_t count) {
-  constexpr size_t kAlign = sizeof(uint32_t);
-  if (count <= 2 * kAlign)
-    return inline_memset_byte_per_byte(dst, value, count);
-  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
-  inline_memset_byte_per_byte(dst, value, bytes_to_dst_align);
-  size_t offset = bytes_to_dst_align;
-  for (; offset < count - kAlign; offset += kAlign)
-    store32_aligned<uint32_t>(generic::splat<uint32_t>(value), dst, offset);
-  inline_memset_byte_per_byte(dst, value, count, offset);
-}
-
-[[maybe_unused]] LIBC_INLINE static void
-inline_memset_aligned_access_64bit(Ptr dst, uint8_t value, size_t count) {
-  constexpr size_t kAlign = sizeof(uint64_t);
-  if (count <= 2 * kAlign)
-    return inline_memset_byte_per_byte(dst, value, count);
-  size_t bytes_to_dst_align = distance_to_align_up<kAlign>(dst);
-  inline_memset_byte_per_byte(dst, value, bytes_to_dst_align);
-  size_t offset = bytes_to_dst_align;
-  for (; offset < count - kAlign; offset += kAlign)
-    store64_aligned<uint64_t>(generic::splat<uint64_t>(value), dst, offset);
-  inline_memset_byte_per_byte(dst, value, count, offset);
-}
-
 #if defined(LIBC_TARGET_ARCH_IS_X86)
 [[maybe_unused]] LIBC_INLINE static void
 inline_memset_x86(Ptr dst, uint8_t value, size_t count) {

utils/bazel/llvm-project-overlay/libc/BUILD.bazel

@@ -2013,6 +2013,7 @@ libc_support_library(
         "src/string/memory_utils/aarch64/memcpy_implementations.h",
         "src/string/memory_utils/bcmp_implementations.h",
         "src/string/memory_utils/bzero_implementations.h",
+        "src/string/memory_utils/generic/aligned_access.h",
         "src/string/memory_utils/generic/byte_per_byte.h",
         "src/string/memory_utils/memcmp_implementations.h",
         "src/string/memory_utils/memcpy_implementations.h",