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835 lines (717 loc) · 21.6 KB
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/* SwapBytes.c -- Byte Swap conversion filter
2024-03-01 : 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);
#if defined(Z7_GCC_VERSION) && (Z7_GCC_VERSION < 80000)
#define MY_mm256_set_m128i(hi, lo) _mm256_insertf128_si256(_mm256_castsi128_si256(lo), (hi), 1)
#else
#define MY_mm256_set_m128i _mm256_set_m128i
#endif
MY_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(MY_CPU_LE) \
&& !defined(Z7_DISABLE_ARM_NEON)
#if defined(__clang__) && (__clang_major__ >= 8) \
|| defined(__GNUC__) && (__GNUC__ >= 6)
#if defined(__ARM_FP)
#if (defined(__ARM_ARCH) && (__ARM_ARCH >= 4)) \
|| defined(MY_CPU_ARM64)
#if defined(MY_CPU_ARM64) \
|| !defined(Z7_CLANG_VERSION) \
|| defined(__ARM_NEON)
#define USE_SWAP_128
#ifdef MY_CPU_ARM64
// #define SWAP_ATTRIB_NEON __attribute__((__target__("")))
#else
#if defined(Z7_CLANG_VERSION)
// #define SWAP_ATTRIB_NEON __attribute__((__target__("neon")))
#else
// #pragma message("SWAP_ATTRIB_NEON __attribute__((__target__(fpu=neon))")
#define SWAP_ATTRIB_NEON __attribute__((__target__("fpu=neon")))
#endif
#endif // MY_CPU_ARM64
#endif // __ARM_NEON
#endif // __ARM_ARCH
#endif // __ARM_FP
#elif defined(_MSC_VER)
#if (_MSC_VER >= 1910)
#define USE_SWAP_128
#endif
#endif
#ifdef USE_SWAP_128
#if defined(Z7_MSC_VER_ORIGINAL) && defined(MY_CPU_ARM64)
#include <arm64_neon.h>
#else
/*
#if !defined(__ARM_NEON)
#if defined(Z7_GCC_VERSION) && (__GNUC__ < 5) \
|| defined(Z7_GCC_VERSION) && (__GNUC__ == 5) && (Z7_GCC_VERSION < 90201) \
|| defined(Z7_GCC_VERSION) && (__GNUC__ == 5) && (Z7_GCC_VERSION < 100100)
Z7_DIAGNOSTIC_IGNORE_BEGIN_RESERVED_MACRO_IDENTIFIER
#pragma message("#define __ARM_NEON 1")
// #define __ARM_NEON 1
Z7_DIAGNOSTIC_IGNORE_END_RESERVED_MACRO_IDENTIFIER
#endif
#endif
*/
#include <arm_neon.h>
#endif
#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); \
1798
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
#if defined(MY_CPU_ARM_OR_ARM64)
#if defined(__clang__)
#pragma GCC
F438
diagnostic ignored "-Wlanguage-extension-token"
#endif
#endif
#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