23.0123.01

1 files changed, 800 insertions, 0 deletions

diff --git a/C/SwapBytes.c b/C/SwapBytes.c
new file mode 100644
index 0000000..7901bba
--- /dev/null
+++ b/C/SwapBytes.c
@@ -0,0 +1,800 @@
+/* SwapBytes.c -- Byte Swap conversion filter
+2023-04-07 : Igor Pavlov : Public domain */
+
+#include "Precomp.h"
+
+#include "Compiler.h"
+#include "CpuArch.h"
+#include "RotateDefs.h"
+#include "SwapBytes.h"
+
+typedef UInt16 CSwapUInt16;
+typedef UInt32 CSwapUInt32;
+
+// #define k_SwapBytes_Mode_BASE   0
+
+#ifdef MY_CPU_X86_OR_AMD64
+
+#define k_SwapBytes_Mode_SSE2   1
+#define k_SwapBytes_Mode_SSSE3  2
+#define k_SwapBytes_Mode_AVX2   3
+
+  // #if defined(__INTEL_COMPILER) && (__INTEL_COMPILER >= 1900)
+  #if defined(__clang__) && (__clang_major__ >= 4) \
+      || defined(Z7_GCC_VERSION) && (Z7_GCC_VERSION >= 40701)
+      #define k_SwapBytes_Mode_MAX  k_SwapBytes_Mode_AVX2
+      #define SWAP_ATTRIB_SSE2  __attribute__((__target__("sse2")))
+      #define SWAP_ATTRIB_SSSE3 __attribute__((__target__("ssse3")))
+      #define SWAP_ATTRIB_AVX2  __attribute__((__target__("avx2")))
+  #elif defined(_MSC_VER)
+    #if (_MSC_VER == 1900)
+      #pragma warning(disable : 4752) // found Intel(R) Advanced Vector Extensions; consider using /arch:AVX
+    #endif
+    #if (_MSC_VER >= 1900)
+      #define k_SwapBytes_Mode_MAX  k_SwapBytes_Mode_AVX2
+    #elif (_MSC_VER >= 1500)  // (VS2008)
+      #define k_SwapBytes_Mode_MAX  k_SwapBytes_Mode_SSSE3
+    #elif (_MSC_VER >= 1310)  // (VS2003)
+      #define k_SwapBytes_Mode_MAX  k_SwapBytes_Mode_SSE2
+    #endif
+  #endif // _MSC_VER
+
+/*
+// for debug
+#ifdef k_SwapBytes_Mode_MAX
+#undef k_SwapBytes_Mode_MAX
+#endif
+*/
+
+#ifndef k_SwapBytes_Mode_MAX
+#define k_SwapBytes_Mode_MAX 0
+#endif
+
+#if (k_SwapBytes_Mode_MAX != 0) && defined(MY_CPU_AMD64)
+  #define k_SwapBytes_Mode_MIN  k_SwapBytes_Mode_SSE2
+#else
+  #define k_SwapBytes_Mode_MIN  0
+#endif
+
+#if (k_SwapBytes_Mode_MAX >= k_SwapBytes_Mode_AVX2)
+  #define USE_SWAP_AVX2
+#endif
+#if (k_SwapBytes_Mode_MAX >= k_SwapBytes_Mode_SSSE3)
+  #define USE_SWAP_SSSE3
+#endif
+#if (k_SwapBytes_Mode_MAX >= k_SwapBytes_Mode_SSE2)
+  #define USE_SWAP_128
+#endif
+
+#if k_SwapBytes_Mode_MAX <= k_SwapBytes_Mode_MIN || !defined(USE_SWAP_128)
+#define FORCE_SWAP_MODE
+#endif
+
+
+#ifdef USE_SWAP_128
+/*
+ <mmintrin.h> MMX
+<xmmintrin.h> SSE
+<emmintrin.h> SSE2
+<pmmintrin.h> SSE3
+<tmmintrin.h> SSSE3
+<smmintrin.h> SSE4.1
+<nmmintrin.h> SSE4.2
+<ammintrin.h> SSE4A
+<wmmintrin.h> AES
+<immintrin.h> AVX, AVX2, FMA
+*/
+
+#include <emmintrin.h> // sse2
+// typedef __m128i v128;
+
+#define SWAP2_128(i) { \
+  const __m128i v = *(const __m128i *)(const void *)(items + (i) * 8); \
+                    *(      __m128i *)(      void *)(items + (i) * 8) = \
+    _mm_or_si128( \
+      _mm_slli_epi16(v, 8), \
+      _mm_srli_epi16(v, 8)); }
+// _mm_or_si128() has more ports to execute than _mm_add_epi16().
+
+static
+#ifdef SWAP_ATTRIB_SSE2
+SWAP_ATTRIB_SSE2
+#endif
+void
+Z7_FASTCALL
+SwapBytes2_128(CSwapUInt16 *items, const CSwapUInt16 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP2_128(0)  SWAP2_128(1)  items += 2 * 8;
+    SWAP2_128(0)  SWAP2_128(1)  items += 2 * 8;
+  }
+  while (items != lim);
+}
+
+/*
+// sse2
+#define SWAP4_128_pack(i) { \
+  __m128i v = *(const __m128i *)(const void *)(items + (i) * 4); \
+  __m128i v0 = _mm_unpacklo_epi8(v, mask); \
+  __m128i v1 = _mm_unpackhi_epi8(v, mask); \
+  v0 = _mm_shufflelo_epi16(v0, 0x1b); \
+  v1 = _mm_shufflelo_epi16(v1, 0x1b); \
+  v0 = _mm_shufflehi_epi16(v0, 0x1b); \
+  v1 = _mm_shufflehi_epi16(v1, 0x1b); \
+  *(__m128i *)(void *)(items + (i) * 4) = _mm_packus_epi16(v0, v1); }
+
+static
+#ifdef SWAP_ATTRIB_SSE2
+SWAP_ATTRIB_SSE2
+#endif
+void
+Z7_FASTCALL
+SwapBytes4_128_pack(CSwapUInt32 *items, const CSwapUInt32 *lim)
+{
+  const __m128i mask = _mm_setzero_si128();
+  // const __m128i mask = _mm_set_epi16(0, 0, 0, 0, 0, 0, 0, 0);
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP4_128_pack(0); items += 1 * 4;
+    // SWAP4_128_pack(0); SWAP4_128_pack(1); items += 2 * 4;
+  }
+  while (items != lim);
+}
+
+// sse2
+#define SWAP4_128_shift(i) { \
+  __m128i v = *(const __m128i *)(const void *)(items + (i) * 4); \
+  __m128i v2; \
+  v2 = _mm_or_si128( \
+        _mm_slli_si128(_mm_and_si128(v, mask), 1), \
+        _mm_and_si128(_mm_srli_si128(v, 1), mask)); \
+  v = _mm_or_si128( \
+        _mm_slli_epi32(v, 24), \
+        _mm_srli_epi32(v, 24)); \
+  *(__m128i *)(void *)(items + (i) * 4) = _mm_or_si128(v2, v); }
+
+static
+#ifdef SWAP_ATTRIB_SSE2
+SWAP_ATTRIB_SSE2
+#endif
+void
+Z7_FASTCALL
+SwapBytes4_128_shift(CSwapUInt32 *items, const CSwapUInt32 *lim)
+{
+  #define M1 0xff00
+  const __m128i mask = _mm_set_epi32(M1, M1, M1, M1);
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    // SWAP4_128_shift(0)  SWAP4_128_shift(1)  items += 2 * 4;
+    // SWAP4_128_shift(0)  SWAP4_128_shift(1)  items += 2 * 4;
+    SWAP4_128_shift(0); items += 1 * 4;
+  }
+  while (items != lim);
+}
+*/
+
+
+#if defined(USE_SWAP_SSSE3) || defined(USE_SWAP_AVX2)
+
+#define SWAP_SHUF_REV_SEQ_2_VALS(v)                (v)+1, (v)
+#define SWAP_SHUF_REV_SEQ_4_VALS(v)  (v)+3, (v)+2, (v)+1, (v)
+
+#define SWAP2_SHUF_MASK_16_BYTES \
+    SWAP_SHUF_REV_SEQ_2_VALS (0 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (1 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (2 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (3 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (4 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (5 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (6 * 2), \
+    SWAP_SHUF_REV_SEQ_2_VALS (7 * 2)
+
+#define SWAP4_SHUF_MASK_16_BYTES \
+    SWAP_SHUF_REV_SEQ_4_VALS (0 * 4), \
+    SWAP_SHUF_REV_SEQ_4_VALS (1 * 4), \
+    SWAP_SHUF_REV_SEQ_4_VALS (2 * 4), \
+    SWAP_SHUF_REV_SEQ_4_VALS (3 * 4)
+
+#if defined(USE_SWAP_AVX2)
+/* if we use 256_BIT_INIT_MASK, each static array mask will be larger for 16 bytes */
+// #define SWAP_USE_256_BIT_INIT_MASK
+#endif
+
+#if defined(SWAP_USE_256_BIT_INIT_MASK) && defined(USE_SWAP_AVX2)
+#define SWAP_MASK_INIT_SIZE 32
+#else
+#define SWAP_MASK_INIT_SIZE 16
+#endif
+
+MY_ALIGN(SWAP_MASK_INIT_SIZE)
+static const Byte k_ShufMask_Swap2[] =
+{
+    SWAP2_SHUF_MASK_16_BYTES
+  #if SWAP_MASK_INIT_SIZE > 16
+  , SWAP2_SHUF_MASK_16_BYTES
+  #endif
+};
+
+MY_ALIGN(SWAP_MASK_INIT_SIZE)
+static const Byte k_ShufMask_Swap4[] =
+{
+    SWAP4_SHUF_MASK_16_BYTES
+  #if SWAP_MASK_INIT_SIZE > 16
+  , SWAP4_SHUF_MASK_16_BYTES
+  #endif
+};
+
+
+#ifdef USE_SWAP_SSSE3
+
+#include <tmmintrin.h> // ssse3
+
+#define SHUF_128(i)   *(items + (i)) = \
+     _mm_shuffle_epi8(*(items + (i)), mask); // SSSE3
+
+// Z7_NO_INLINE
+static
+#ifdef SWAP_ATTRIB_SSSE3
+SWAP_ATTRIB_SSSE3
+#endif
+Z7_ATTRIB_NO_VECTORIZE
+void
+Z7_FASTCALL
+ShufBytes_128(void *items8, const void *lim8, const void *mask128_ptr)
+{
+  __m128i *items = (__m128i *)items8;
+  const __m128i *lim = (const __m128i *)lim8;
+  // const __m128i mask = _mm_set_epi8(SHUF_SWAP2_MASK_16_VALS);
+  // const __m128i mask = _mm_set_epi8(SHUF_SWAP4_MASK_16_VALS);
+  // const __m128i mask = _mm_load_si128((const __m128i *)(const void *)&(k_ShufMask_Swap4[0]));
+  // const __m128i mask = _mm_load_si128((const __m128i *)(const void *)&(k_ShufMask_Swap4[0]));
+  // const __m128i mask = *(const __m128i *)(const void *)&(k_ShufMask_Swap4[0]);
+  const __m128i mask = *(const __m128i *)mask128_ptr;
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SHUF_128(0)  SHUF_128(1)  items += 2;
+    SHUF_128(0)  SHUF_128(1)  items += 2;
+  }
+  while (items != lim);
+}
+
+#endif // USE_SWAP_SSSE3
+
+
+
+#ifdef USE_SWAP_AVX2
+
+#include <immintrin.h> // avx, avx2
+#if defined(__clang__)
+#include <avxintrin.h>
+#include <avx2intrin.h>
+#endif
+
+#define SHUF_256(i)   *(items + (i)) = \
+  _mm256_shuffle_epi8(*(items + (i)), mask); // AVX2
+
+// Z7_NO_INLINE
+static
+#ifdef SWAP_ATTRIB_AVX2
+SWAP_ATTRIB_AVX2
+#endif
+Z7_ATTRIB_NO_VECTORIZE
+void
+Z7_FASTCALL
+ShufBytes_256(void *items8, const void *lim8, const void *mask128_ptr)
+{
+  __m256i *items = (__m256i *)items8;
+  const __m256i *lim = (const __m256i *)lim8;
+  /*
+  UNUSED_VAR(mask128_ptr)
+  __m256i mask =
+  for Swap4: _mm256_setr_epi8(SWAP4_SHUF_MASK_16_BYTES, SWAP4_SHUF_MASK_16_BYTES);
+  for Swap2: _mm256_setr_epi8(SWAP2_SHUF_MASK_16_BYTES, SWAP2_SHUF_MASK_16_BYTES);
+  */
+  const __m256i mask =
+ #if SWAP_MASK_INIT_SIZE > 16
+      *(const __m256i *)(const void *)mask128_ptr;
+ #else
+  /* msvc: broadcastsi128() version reserves the stack for no reason
+     msvc 19.29-: _mm256_insertf128_si256() / _mm256_set_m128i)) versions use non-avx movdqu   xmm0,XMMWORD PTR [r8]
+     msvc 19.30+ (VS2022): replaces _mm256_set_m128i(m,m) to vbroadcastf128(m) as we want
+  */
+  // _mm256_broadcastsi128_si256(*mask128_ptr);
+  /*
+  #define MY_mm256_set_m128i(hi, lo)  _mm256_insertf128_si256(_mm256_castsi128_si256(lo), (hi), 1)
+  MY_mm256_set_m128i
+  */
+      _mm256_set_m128i(
+        *(const __m128i *)mask128_ptr,
+        *(const __m128i *)mask128_ptr);
+ #endif
+  
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SHUF_256(0)  SHUF_256(1)  items += 2;
+    SHUF_256(0)  SHUF_256(1)  items += 2;
+  }
+  while (items != lim);
+}
+
+#endif // USE_SWAP_AVX2
+#endif // USE_SWAP_SSSE3 || USE_SWAP_AVX2
+#endif // USE_SWAP_128
+
+
+
+// compile message "NEON intrinsics not available with the soft-float ABI"
+#elif defined(MY_CPU_ARM_OR_ARM64) || \
+    (defined(__ARM_ARCH) && (__ARM_ARCH >= 7))
+// #elif defined(MY_CPU_ARM64)
+
+  #if defined(__clang__) && (__clang_major__ >= 8) \
+    || defined(__GNUC__) && (__GNUC__ >= 8)
+    #if (defined(__ARM_ARCH) && (__ARM_ARCH >= 7)) \
+        || defined(MY_CPU_ARM64)
+      #define USE_SWAP_128
+    #endif
+    #ifdef MY_CPU_ARM64
+      // #define SWAP_ATTRIB_NEON __attribute__((__target__("")))
+    #else
+      // #define SWAP_ATTRIB_NEON __attribute__((__target__("fpu=crypto-neon-fp-armv8")))
+    #endif
+  #elif defined(_MSC_VER)
+    #if (_MSC_VER >= 1910)
+      #define USE_SWAP_128
+    #endif
+  #endif
+
+  #if defined(_MSC_VER) && defined(MY_CPU_ARM64)
+    #include <arm64_neon.h>
+  #else
+    #include <arm_neon.h>
+  #endif
+
+#ifndef USE_SWAP_128
+  #define FORCE_SWAP_MODE
+#else
+ 
+#ifdef MY_CPU_ARM64
+  // for debug : comment it
+  #define FORCE_SWAP_MODE
+#else
+  #define k_SwapBytes_Mode_NEON 1
+#endif
+// typedef uint8x16_t v128;
+#define SWAP2_128(i)   *(uint8x16_t *)      (void *)(items + (i) * 8) = \
+      vrev16q_u8(*(const uint8x16_t *)(const void *)(items + (i) * 8));
+#define SWAP4_128(i)   *(uint8x16_t *)      (void *)(items + (i) * 4) = \
+      vrev32q_u8(*(const uint8x16_t *)(const void *)(items + (i) * 4));
+
+// Z7_NO_INLINE
+static
+#ifdef SWAP_ATTRIB_NEON
+SWAP_ATTRIB_NEON
+#endif
+Z7_ATTRIB_NO_VECTORIZE
+void
+Z7_FASTCALL
+SwapBytes2_128(CSwapUInt16 *items, const CSwapUInt16 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP2_128(0)  SWAP2_128(1)  items += 2 * 8;
+    SWAP2_128(0)  SWAP2_128(1)  items += 2 * 8;
+  }
+  while (items != lim);
+}
+
+// Z7_NO_INLINE
+static
+#ifdef SWAP_ATTRIB_NEON
+SWAP_ATTRIB_NEON
+#endif
+Z7_ATTRIB_NO_VECTORIZE
+void
+Z7_FASTCALL
+SwapBytes4_128(CSwapUInt32 *items, const CSwapUInt32 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP4_128(0)  SWAP4_128(1)  items += 2 * 4;
+    SWAP4_128(0)  SWAP4_128(1)  items += 2 * 4;
+  }
+  while (items != lim);
+}
+
+#endif // USE_SWAP_128
+
+#else // MY_CPU_ARM_OR_ARM64
+#define FORCE_SWAP_MODE
+#endif // MY_CPU_ARM_OR_ARM64
+
+
+
+
+
+
+#if defined(Z7_MSC_VER_ORIGINAL) && defined(MY_CPU_X86)
+  /* _byteswap_ushort() in MSVC x86 32-bit works via slow { mov dh, al; mov dl, ah }
+     So we use own versions of byteswap function */
+  #if (_MSC_VER < 1400 )  // old MSVC-X86 without _rotr16() support
+    #define SWAP2_16(i)  { UInt32 v = items[i];  v += (v << 16);  v >>= 8;  items[i] = (CSwapUInt16)v; }
+  #else  // is new MSVC-X86 with fast _rotr16()
+    #include <intrin.h>
+    #define SWAP2_16(i)  { items[i] = _rotr16(items[i], 8); }
+  #endif
+#else  // is not MSVC-X86
+  #define SWAP2_16(i)  { CSwapUInt16 v = items[i];  items[i] = Z7_BSWAP16(v); }
+#endif  // MSVC-X86
+
+#if defined(Z7_CPU_FAST_BSWAP_SUPPORTED)
+  #define SWAP4_32(i)  { CSwapUInt32 v = items[i];  items[i] = Z7_BSWAP32(v); }
+#else
+  #define SWAP4_32(i)  \
+    { UInt32 v = items[i]; \
+      v = ((v & 0xff00ff) << 8) + ((v >> 8) & 0xff00ff); \
+      v = rotlFixed(v, 16); \
+      items[i] = v; }
+#endif
+
+
+
+
+#if defined(FORCE_SWAP_MODE) && defined(USE_SWAP_128)
+  #define DEFAULT_Swap2  SwapBytes2_128
+  #if !defined(MY_CPU_X86_OR_AMD64)
+    #define DEFAULT_Swap4  SwapBytes4_128
+  #endif
+#endif
+
+#if !defined(DEFAULT_Swap2) || !defined(DEFAULT_Swap4)
+
+#define SWAP_BASE_FUNCS_PREFIXES \
+Z7_FORCE_INLINE  \
+static \
+Z7_ATTRIB_NO_VECTOR  \
+void Z7_FASTCALL
+
+
+#ifdef MY_CPU_64BIT
+
+#if defined(MY_CPU_ARM64) \
+    && defined(__ARM_ARCH) && (__ARM_ARCH >= 8) \
+    && (  (defined(__GNUC__) && (__GNUC__ >= 4)) \
+       || (defined(__clang__) && (__clang_major__ >= 4)))
+
+  #define SWAP2_64_VAR(v)  asm ("rev16 %x0,%x0" : "+r" (v));
+  #define SWAP4_64_VAR(v)  asm ("rev32 %x0,%x0" : "+r" (v));
+
+#else  // is not ARM64-GNU
+
+#if !defined(MY_CPU_X86_OR_AMD64) || (k_SwapBytes_Mode_MIN == 0) || !defined(USE_SWAP_128)
+  #define SWAP2_64_VAR(v) \
+    v = ( 0x00ff00ff00ff00ff & (v >> 8))  \
+      + ((0x00ff00ff00ff00ff & v) << 8);
+      /* plus gives faster code in MSVC */
+#endif
+
+#ifdef Z7_CPU_FAST_BSWAP_SUPPORTED
+  #define SWAP4_64_VAR(v) \
+    v = Z7_BSWAP64(v); \
+    v = Z7_ROTL64(v, 32);
+#else
+  #define SWAP4_64_VAR(v) \
+    v = ( 0x000000ff000000ff & (v >> 24))  \
+      + ((0x000000ff000000ff & v) << 24 )  \
+      + ( 0x0000ff000000ff00 & (v >>  8))  \
+      + ((0x0000ff000000ff00 & v) <<  8 )  \
+      ;
+#endif
+
+#endif  // ARM64-GNU
+
+
+#ifdef SWAP2_64_VAR
+
+#define SWAP2_64(i) { \
+    UInt64 v = *(const UInt64 *)(const void *)(items + (i) * 4); \
+    SWAP2_64_VAR(v) \
+    *(UInt64 *)(void *)(items + (i) * 4) = v; }
+
+SWAP_BASE_FUNCS_PREFIXES
+SwapBytes2_64(CSwapUInt16 *items, const CSwapUInt16 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP2_64(0)  SWAP2_64(1)  items += 2 * 4;
+    SWAP2_64(0)  SWAP2_64(1)  items += 2 * 4;
+  }
+  while (items != lim);
+}
+
+  #define DEFAULT_Swap2  SwapBytes2_64
+  #if !defined(FORCE_SWAP_MODE)
+    #define SWAP2_DEFAULT_MODE 0
+  #endif
+#else // !defined(SWAP2_64_VAR)
+  #define DEFAULT_Swap2  SwapBytes2_128
+  #if !defined(FORCE_SWAP_MODE)
+    #define SWAP2_DEFAULT_MODE 1
+  #endif
+#endif // SWAP2_64_VAR
+
+
+#define SWAP4_64(i) { \
+    UInt64 v = *(const UInt64 *)(const void *)(items + (i) * 2); \
+    SWAP4_64_VAR(v) \
+    *(UInt64 *)(void *)(items + (i) * 2) = v; }
+
+SWAP_BASE_FUNCS_PREFIXES
+SwapBytes4_64(CSwapUInt32 *items, const CSwapUInt32 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP4_64(0)  SWAP4_64(1)  items += 2 * 2;
+    SWAP4_64(0)  SWAP4_64(1)  items += 2 * 2;
+  }
+  while (items != lim);
+}
+
+#define DEFAULT_Swap4  SwapBytes4_64
+
+#else  // is not 64BIT
+
+
+#if defined(MY_CPU_ARM_OR_ARM64) \
+    && defined(__ARM_ARCH) && (__ARM_ARCH >= 6) \
+    && (  (defined(__GNUC__) && (__GNUC__ >= 4)) \
+       || (defined(__clang__) && (__clang_major__ >= 4)))
+
+#ifdef MY_CPU_64BIT
+  #define SWAP2_32_VAR(v)  asm ("rev16 %w0,%w0" : "+r" (v));
+#else
+  #define SWAP2_32_VAR(v)  asm ("rev16 %0,%0" : "+r" (v)); // for clang/gcc
+    // asm ("rev16 %r0,%r0" : "+r" (a));  // for gcc
+#endif
+
+#elif defined(_MSC_VER) && (_MSC_VER < 1300) && defined(MY_CPU_X86) \
+    || !defined(Z7_CPU_FAST_BSWAP_SUPPORTED) \
+    || !defined(Z7_CPU_FAST_ROTATE_SUPPORTED)
+  // old msvc doesn't support _byteswap_ulong()
+  #define SWAP2_32_VAR(v) \
+    v = ((v & 0xff00ff) << 8) + ((v >> 8) & 0xff00ff);
+
+#else  // is not ARM and is not old-MSVC-X86 and fast BSWAP/ROTATE are supported
+  #define SWAP2_32_VAR(v) \
+    v = Z7_BSWAP32(v); \
+    v = rotlFixed(v, 16);
+
+#endif  // GNU-ARM*
+
+#define SWAP2_32(i) { \
+    UInt32 v = *(const UInt32 *)(const void *)(items + (i) * 2); \
+    SWAP2_32_VAR(v); \
+    *(UInt32 *)(void *)(items + (i) * 2) = v; }
+
+
+SWAP_BASE_FUNCS_PREFIXES
+SwapBytes2_32(CSwapUInt16 *items, const CSwapUInt16 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP2_32(0)  SWAP2_32(1)  items += 2 * 2;
+    SWAP2_32(0)  SWAP2_32(1)  items += 2 * 2;
+  }
+  while (items != lim);
+}
+
+
+SWAP_BASE_FUNCS_PREFIXES
+SwapBytes4_32(CSwapUInt32 *items, const CSwapUInt32 *lim)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  do
+  {
+    SWAP4_32(0)  SWAP4_32(1)  items += 2;
+    SWAP4_32(0)  SWAP4_32(1)  items += 2;
+  }
+  while (items != lim);
+}
+
+#define DEFAULT_Swap2  SwapBytes2_32
+#define DEFAULT_Swap4  SwapBytes4_32
+#if !defined(FORCE_SWAP_MODE)
+  #define SWAP2_DEFAULT_MODE 0
+#endif
+
+#endif // MY_CPU_64BIT
+#endif // if !defined(DEFAULT_Swap2) || !defined(DEFAULT_Swap4)
+
+
+
+#if !defined(FORCE_SWAP_MODE)
+static unsigned g_SwapBytes_Mode;
+#endif
+
+/* size of largest unrolled loop iteration: 128 bytes = 4 * 32 bytes (AVX). */
+#define SWAP_ITERATION_BLOCK_SIZE_MAX  (1 << 7)
+
+// 32 bytes for (AVX) or 2 * 16-bytes for NEON.
+#define SWAP_VECTOR_ALIGN_SIZE  (1 << 5)
+
+Z7_NO_INLINE
+void z7_SwapBytes2(CSwapUInt16 *items, size_t numItems)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  for (; numItems != 0 && ((unsigned)(ptrdiff_t)items & (SWAP_VECTOR_ALIGN_SIZE - 1)) != 0; numItems--)
+  {
+    SWAP2_16(0)
+    items++;
+  }
+  {
+    const size_t k_Align_Mask = SWAP_ITERATION_BLOCK_SIZE_MAX / sizeof(CSwapUInt16) - 1;
+    size_t numItems2 = numItems;
+    CSwapUInt16 *lim;
+    numItems &= k_Align_Mask;
+    numItems2 &= ~(size_t)k_Align_Mask;
+    lim = items + numItems2;
+    if (numItems2 != 0)
+    {
+     #if !defined(FORCE_SWAP_MODE)
+      #ifdef MY_CPU_X86_OR_AMD64
+        #ifdef USE_SWAP_AVX2
+          if (g_SwapBytes_Mode > k_SwapBytes_Mode_SSSE3)
+            ShufBytes_256((__m256i *)(void *)items,
+                (const __m256i *)(const void *)lim,
+                (const __m128i *)(const void *)&(k_ShufMask_Swap2[0]));
+          else
+        #endif
+        #ifdef USE_SWAP_SSSE3
+          if (g_SwapBytes_Mode >= k_SwapBytes_Mode_SSSE3)
+            ShufBytes_128((__m128i *)(void *)items,
+                (const __m128i *)(const void *)lim,
+                (const __m128i *)(const void *)&(k_ShufMask_Swap2[0]));
+          else
+        #endif
+      #endif  // MY_CPU_X86_OR_AMD64
+      #if SWAP2_DEFAULT_MODE == 0
+          if (g_SwapBytes_Mode != 0)
+            SwapBytes2_128(items, lim);
+          else
+      #endif
+     #endif // FORCE_SWAP_MODE
+            DEFAULT_Swap2(items, lim);
+    }
+    items = lim;
+  }
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  for (; numItems != 0; numItems--)
+  {
+    SWAP2_16(0)
+    items++;
+  }
+}
+
+
+Z7_NO_INLINE
+void z7_SwapBytes4(CSwapUInt32 *items, size_t numItems)
+{
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  for (; numItems != 0 && ((unsigned)(ptrdiff_t)items & (SWAP_VECTOR_ALIGN_SIZE - 1)) != 0; numItems--)
+  {
+    SWAP4_32(0)
+    items++;
+  }
+  {
+    const size_t k_Align_Mask = SWAP_ITERATION_BLOCK_SIZE_MAX / sizeof(CSwapUInt32) - 1;
+    size_t numItems2 = numItems;
+    CSwapUInt32 *lim;
+    numItems &= k_Align_Mask;
+    numItems2 &= ~(size_t)k_Align_Mask;
+    lim = items + numItems2;
+    if (numItems2 != 0)
+    {
+     #if !defined(FORCE_SWAP_MODE)
+      #ifdef MY_CPU_X86_OR_AMD64
+        #ifdef USE_SWAP_AVX2
+          if (g_SwapBytes_Mode > k_SwapBytes_Mode_SSSE3)
+            ShufBytes_256((__m256i *)(void *)items,
+                (const __m256i *)(const void *)lim,
+                (const __m128i *)(const void *)&(k_ShufMask_Swap4[0]));
+          else
+        #endif
+        #ifdef USE_SWAP_SSSE3
+          if (g_SwapBytes_Mode >= k_SwapBytes_Mode_SSSE3)
+            ShufBytes_128((__m128i *)(void *)items,
+                (const __m128i *)(const void *)lim,
+                (const __m128i *)(const void *)&(k_ShufMask_Swap4[0]));
+          else
+        #endif
+      #else  // MY_CPU_X86_OR_AMD64
+
+          if (g_SwapBytes_Mode != 0)
+            SwapBytes4_128(items, lim);
+          else
+      #endif  // MY_CPU_X86_OR_AMD64
+     #endif // FORCE_SWAP_MODE
+            DEFAULT_Swap4(items, lim);
+    }
+    items = lim;
+  }
+  Z7_PRAGMA_OPT_DISABLE_LOOP_UNROLL_VECTORIZE
+  for (; numItems != 0; numItems--)
+  {
+    SWAP4_32(0)
+    items++;
+  }
+}
+
+
+// #define SHOW_HW_STATUS
+
+#ifdef SHOW_HW_STATUS
+#include <stdio.h>
+#define PRF(x) x
+#else
+#define PRF(x)
+#endif
+
+void z7_SwapBytesPrepare(void)
+{
+#ifndef FORCE_SWAP_MODE
+  unsigned mode = 0; // k_SwapBytes_Mode_BASE;
+
+#ifdef MY_CPU_ARM_OR_ARM64
+  {
+    if (CPU_IsSupported_NEON())
+    {
+      // #pragma message ("=== SwapBytes NEON")
+      PRF(printf("\n=== SwapBytes NEON\n");)
+      mode = k_SwapBytes_Mode_NEON;
+    }
+  }
+#else // MY_CPU_ARM_OR_ARM64
+  {
+    #ifdef USE_SWAP_AVX2
+      if (CPU_IsSupported_AVX2())
+      {
+        // #pragma message ("=== SwapBytes AVX2")
+        PRF(printf("\n=== SwapBytes AVX2\n");)
+        mode = k_SwapBytes_Mode_AVX2;
+      }
+      else
+    #endif
+    #ifdef USE_SWAP_SSSE3
+      if (CPU_IsSupported_SSSE3())
+      {
+        // #pragma message ("=== SwapBytes SSSE3")
+        PRF(printf("\n=== SwapBytes SSSE3\n");)
+        mode = k_SwapBytes_Mode_SSSE3;
+      }
+      else
+    #endif
+    #if !defined(MY_CPU_AMD64)
+      if (CPU_IsSupported_SSE2())
+    #endif
+      {
+        // #pragma message ("=== SwapBytes SSE2")
+        PRF(printf("\n=== SwapBytes SSE2\n");)
+        mode = k_SwapBytes_Mode_SSE2;
+      }
+  }
+#endif // MY_CPU_ARM_OR_ARM64
+  g_SwapBytes_Mode = mode;
+  // g_SwapBytes_Mode = 0; // for debug
+#endif // FORCE_SWAP_MODE
+  PRF(printf("\n=== SwapBytesPrepare\n");)
+}
+
+#undef PRF