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#454: SIMD CRC routines for Intel and ARM

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This commit is contained in:
Andrey Prygunkov
2017-10-12 21:09:24 +02:00
parent 2691eff535
commit a31fb733a2
18 changed files with 634 additions and 496 deletions
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71
lib/yencode/SimdInit.cpp
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@@ -32,17 +32,28 @@ namespace YEncode
{
size_t (*decode)(const unsigned char*, unsigned char*, size_t, char* state) = nullptr;
size_t (*decode_simd)(const unsigned char*, unsigned char*, size_t, char* state) = nullptr;
uint32_t (*crc32_simd)(const unsigned char* src, long len) = nullptr;
uint32_t (*inc_crc32_simd)(uint32_t crc, const unsigned char* src, long len) = nullptr;
bool decode_simd = false;
void (*crc_init)(crc_state *const s) = nullptr;
void (*crc_incr)(crc_state *const s, const unsigned char *src, long len) = nullptr;
uint32_t (*crc_finish)(crc_state *const s) = nullptr;
bool crc_simd = false;
void crc_slice_init(crc_state *const s);
void crc_slice(crc_state *const s, const unsigned char *src, long len);
uint32_t crc_slice_finish(crc_state *const s);
#if defined(__i686__) || defined(__amd64__)
size_t (*decode_sse2)(const unsigned char* src, unsigned char* dest, size_t len, char* state) = nullptr;
extern void init_decode_sse2();
size_t (*decode_ssse3)(const unsigned char* src, unsigned char* dest, size_t len, char* state) = nullptr;
extern void init_decode_ssse3();
uint32_t (*crc32_pclmul)(const unsigned char *src, long len) = nullptr;
extern void init_crc32_pclmul();
void (*crc_init_pclmul)(crc_state *const s) = nullptr;
void (*crc_incr_pclmul)(crc_state *const s, const unsigned char *src, long len) = nullptr;
uint32_t (*crc_finish_pclmul)(crc_state *const s) = nullptr;
extern void init_crc_pclmul();
class CpuId
{
@@ -66,13 +77,19 @@ public:
#if defined(__arm__) || defined(__aarch64__)
size_t (*decode_neon)(const unsigned char* src, unsigned char* dest, size_t len, char* state) = nullptr;
extern void init_decode_neon();
uint32_t (*crc32_arm)(const unsigned char *src, long len) = nullptr;
extern void init_crc32_arm();
void (*crc_init_acle)(crc_state *const s) = nullptr;
void (*crc_incr_acle)(crc_state *const s, const unsigned char *src, long len) = nullptr;
uint32_t (*crc_finish_acle)(crc_state *const s) = nullptr;
extern void init_crc_acle();
#endif
void init()
{
decode = &decode_scalar;
crc_init = &crc_slice_init;
crc_incr = &crc_slice;
crc_finish = &crc_slice_finish;
#if defined(__i686__) || defined(__amd64__)
CpuId cpuid(1);
@@ -85,20 +102,31 @@ void init()
if (cpu_supports_sse2)
{
init_decode_sse2();
decode_simd = decode_sse2;
if (decode_sse2)
{
decode = decode_sse2;
decode_simd = true;
}
}
if (cpu_supports_ssse3)
{
init_decode_ssse3();
if (decode_ssse3)
{
decode_simd = decode_ssse3;
decode = decode_ssse3;
decode_simd = true;
}
}
if (cpu_supports_sse41 && cpu_supports_pclmul)
{
init_crc32_pclmul();
crc32_simd = crc32_pclmul;
init_crc_pclmul();
if (crc_init_pclmul && crc_incr_pclmul && crc_finish_pclmul)
{
crc_init = crc_init_pclmul;
crc_incr = crc_incr_pclmul;
crc_finish = crc_finish_pclmul;
crc_simd = true;
}
}
#endif
@@ -123,19 +151,24 @@ void init()
if (cpu_supports_neon)
{
init_decode_neon();
decode_simd = decode_neon;
if (decode_neon)
{
decode = decode_neon;
decode_simd = true;
}
}
if (cpu_supports_crc)
{
init_crc32_arm();
crc32_simd = crc32_arm;
init_crc_acle();
if (crc_init_acle && crc_incr_acle && crc_finish_acle)
{
crc_init = crc_init_acle;
crc_incr = crc_incr_acle;
crc_finish = crc_finish_acle;
crc_simd = true;
}
}
#endif
if (decode_simd)
{
decode = decode_simd;
}
}
}