#ifdef X86_VPCLMULQDQ_CRC
extern size_t fold_16_vpclmulqdq(__m128i *xmm_crc0, __m128i *xmm_crc1,
- __m128i *xmm_crc2, __m128i *xmm_crc3, uint8_t *dst, const uint8_t *src, size_t len);
-extern size_t fold_16_vpclmulqdq_nocp(__m128i *xmm_crc0, __m128i *xmm_crc1,
__m128i *xmm_crc2, __m128i *xmm_crc3, const uint8_t *src, size_t len, __m128i init_crc,
int32_t first);
+extern size_t fold_16_vpclmulqdq_copy(__m128i *xmm_crc0, __m128i *xmm_crc1,
+ __m128i *xmm_crc2, __m128i *xmm_crc3, uint8_t *dst, const uint8_t *src, size_t len);
#endif
static void fold_1(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
_mm_storeu_si128(fold + 3, fold3);
}
-static inline void crc32_fold_save_partial(__m128i *fold, __m128i foldp) {
- _mm_store_si128(fold + 4, foldp);
-}
-
-Z_INTERNAL uint32_t crc32_fold_reset_pclmulqdq(crc32_fold *crc) {
+Z_INTERNAL uint32_t crc32_fold_pclmulqdq_reset(crc32_fold *crc) {
__m128i xmm_crc0 = _mm_cvtsi32_si128(0x9db42487);
__m128i xmm_zero = _mm_setzero_si128();
crc32_fold_save((__m128i *)crc->fold, xmm_crc0, xmm_zero, xmm_zero, xmm_zero);
return 0;
}
-Z_INTERNAL void crc32_fold_copy_pclmulqdq(crc32_fold *crc, uint8_t *dst, const uint8_t *src, size_t len) {
- unsigned long algn_diff;
- __m128i xmm_t0, xmm_t1, xmm_t2, xmm_t3;
- __m128i xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3, xmm_crc_part;
- char ALIGNED_(16) partial_buf[16] = { 0 };
-
- crc32_fold_load((__m128i *)crc->fold, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- if (len < 16) {
- if (len == 0)
- return;
-
- memcpy(partial_buf, src, len);
- xmm_crc_part = _mm_load_si128((const __m128i *)partial_buf);
- memcpy(dst, partial_buf, len);
- goto partial;
- }
-
- algn_diff = ((uintptr_t)16 - ((uintptr_t)src & 0xF)) & 0xF;
- if (algn_diff) {
- xmm_crc_part = _mm_loadu_si128((__m128i *)src);
- _mm_storeu_si128((__m128i *)dst, xmm_crc_part);
-
- dst += algn_diff;
- src += algn_diff;
- len -= algn_diff;
-
- partial_fold(algn_diff, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
- } else {
- xmm_crc_part = _mm_setzero_si128();
- }
-
-#ifdef X86_VPCLMULQDQ_CRC
- if (x86_cpu_has_vpclmulqdq && x86_cpu_has_avx512 && (len >= 256)) {
- size_t n = fold_16_vpclmulqdq(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, dst, src, len);
-
- len -= n;
- src += n;
- dst += n;
- }
-#endif
-
- while (len >= 64) {
- crc32_fold_load((__m128i *)src, &xmm_t0, &xmm_t1, &xmm_t2, &xmm_t3);
-
- fold_4(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- crc32_fold_save((__m128i *)dst, xmm_t0, xmm_t1, xmm_t2, xmm_t3);
-
- xmm_crc0 = _mm_xor_si128(xmm_crc0, xmm_t0);
- xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t1);
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t2);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t3);
-
- src += 64;
- dst += 64;
- len -= 64;
- }
-
- /*
- * len = num bytes left - 64
- */
- if (len >= 48) {
- xmm_t0 = _mm_load_si128((__m128i *)src);
- xmm_t1 = _mm_load_si128((__m128i *)src + 1);
- xmm_t2 = _mm_load_si128((__m128i *)src + 2);
-
- fold_3(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- _mm_storeu_si128((__m128i *)dst, xmm_t0);
- _mm_storeu_si128((__m128i *)dst + 1, xmm_t1);
- _mm_storeu_si128((__m128i *)dst + 2, xmm_t2);
-
- xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t0);
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t1);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t2);
- len -= 48;
- if (len == 0)
- goto done;
-
- dst += 48;
- memcpy(&xmm_crc_part, (__m128i *)src + 3, len);
- } else if (len >= 32) {
- xmm_t0 = _mm_load_si128((__m128i *)src);
- xmm_t1 = _mm_load_si128((__m128i *)src + 1);
-
- fold_2(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- _mm_storeu_si128((__m128i *)dst, xmm_t0);
- _mm_storeu_si128((__m128i *)dst + 1, xmm_t1);
-
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t0);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t1);
+#define ONCE(op) if (first) { first = 0; op; }
+#define XOR_INITIAL(where) ONCE(where = _mm_xor_si128(where, xmm_initial))
- len -= 32;
- if (len == 0)
- goto done;
-
- dst += 32;
- memcpy(&xmm_crc_part, (__m128i *)src + 2, len);
- } else if (len >= 16) {
- xmm_t0 = _mm_load_si128((__m128i *)src);
-
- fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- _mm_storeu_si128((__m128i *)dst, xmm_t0);
-
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
-
- len -= 16;
- if (len == 0)
- goto done;
-
- dst += 16;
- memcpy(&xmm_crc_part, (__m128i *)src + 1, len);
- } else {
- if (len == 0)
- goto done;
- memcpy(&xmm_crc_part, src, len);
- }
-
- _mm_storeu_si128((__m128i *)partial_buf, xmm_crc_part);
- memcpy(dst, partial_buf, len);
-
-partial:
- partial_fold((size_t)len, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
-done:
- crc32_fold_save((__m128i *)crc->fold, xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3);
- crc32_fold_save_partial((__m128i *)crc->fold, xmm_crc_part);
-}
-
-#define ONCE(op) if (first) { \
- first = 0; \
- (op); \
-}
-#define XOR_INITIAL(where) ONCE(where = _mm_xor_si128(where, xmm_initial))
-
-Z_INTERNAL void crc32_fold_pclmulqdq(crc32_fold *crc, const uint8_t *src, size_t len, uint32_t init_crc) {
- unsigned long algn_diff;
- __m128i xmm_t0, xmm_t1, xmm_t2, xmm_t3;
- __m128i xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3, xmm_crc_part;
- __m128i xmm_initial = _mm_cvtsi32_si128(init_crc);
- xmm_crc_part = _mm_setzero_si128();
- int32_t first = init_crc != 0;
-
- /* Technically the CRC functions don't even call this for input < 64, but a bare minimum of 31
- * bytes of input is needed for the aligning load that occurs. If there's an initial CRC, to
- * carry it forward through the folded CRC there must be 16 - src % 16 + 16 bytes available, which
- * by definition can be up to 15 bytes + one full vector load. */
- assert(len >= 31 || first == 0);
- crc32_fold_load((__m128i *)crc->fold, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- if (len < 16) {
- goto partial_nocpy;
- }
-
- algn_diff = ((uintptr_t)16 - ((uintptr_t)src & 0xF)) & 0xF;
- if (algn_diff) {
- if (algn_diff >= 4 || init_crc == 0) {
- xmm_crc_part = _mm_loadu_si128((__m128i *)src);
-
- src += algn_diff;
- len -= algn_diff;
-
- XOR_INITIAL(xmm_crc_part);
- partial_fold(algn_diff, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
- } else {
- xmm_t0 = _mm_loadu_si128((__m128i*)src);
- xmm_crc_part = _mm_loadu_si128((__m128i*)src + 1);
- XOR_INITIAL(xmm_t0);
- fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
- partial_fold(algn_diff, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
-
- src += (algn_diff + 16);
- len -= (algn_diff + 16);
- }
-
- xmm_crc_part = _mm_setzero_si128();
- }
-
-#ifdef X86_VPCLMULQDQ_CRC
- if (x86_cpu_has_vpclmulqdq && x86_cpu_has_avx512 && (len >= 256)) {
- size_t n = fold_16_vpclmulqdq_nocp(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, src, len,
- xmm_initial, first);
- first = 0;
-
- len -= n;
- src += n;
- }
-#endif
-
- while (len >= 64) {
- crc32_fold_load((__m128i *)src, &xmm_t0, &xmm_t1, &xmm_t2, &xmm_t3);
- XOR_INITIAL(xmm_t0);
- fold_4(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- xmm_crc0 = _mm_xor_si128(xmm_crc0, xmm_t0);
- xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t1);
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t2);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t3);
-
- src += 64;
- len -= 64;
- }
-
- /*
- * len = num bytes left - 64
- */
- if (len >= 48) {
- xmm_t0 = _mm_load_si128((__m128i *)src);
- xmm_t1 = _mm_load_si128((__m128i *)src + 1);
- xmm_t2 = _mm_load_si128((__m128i *)src + 2);
- XOR_INITIAL(xmm_t0);
-
- fold_3(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t0);
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t1);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t2);
- len -= 48;
- src += 48;
- } else if (len >= 32) {
- xmm_t0 = _mm_load_si128((__m128i *)src);
- xmm_t1 = _mm_load_si128((__m128i *)src + 1);
- XOR_INITIAL(xmm_t0);
-
- fold_2(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t0);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t1);
-
- len -= 32;
- src += 32;
- } else if (len >= 16) {
- xmm_t0 = _mm_load_si128((__m128i *)src);
- XOR_INITIAL(xmm_t0);
-
- fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
-
- len -= 16;
- src += 16;
- }
-
-partial_nocpy:
- if (len) {
- memcpy(&xmm_crc_part, src, len);
- partial_fold((size_t)len, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
- }
-
- crc32_fold_save((__m128i *)crc->fold, xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3);
-}
+#include "crc32_fold_pclmulqdq_tpl.h"
+#define COPY
+#include "crc32_fold_pclmulqdq_tpl.h"
static const unsigned ALIGNED_(16) crc_k[] = {
0xccaa009e, 0x00000000, /* rk1 */
0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
};
-Z_INTERNAL uint32_t crc32_fold_final_pclmulqdq(crc32_fold *crc) {
+Z_INTERNAL uint32_t crc32_fold_pclmulqdq_final(crc32_fold *crc) {
const __m128i xmm_mask = _mm_load_si128((__m128i *)crc_mask);
const __m128i xmm_mask2 = _mm_load_si128((__m128i *)crc_mask2);
__m128i xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3;
return crc32_braid(crc32, buf, len);
crc32_fold ALIGNED_(16) crc_state;
- crc32_fold_reset_pclmulqdq(&crc_state);
+ crc32_fold_pclmulqdq_reset(&crc_state);
crc32_fold_pclmulqdq(&crc_state, buf, len, crc32);
- return crc32_fold_final_pclmulqdq(&crc_state);
+ return crc32_fold_pclmulqdq_final(&crc_state);
}
-
#endif
--- /dev/null
+/*
+ * Compute the CRC32 using a parallelized folding approach with the PCLMULQDQ
+ * instruction.
+ *
+ * A white paper describing this algorithm can be found at:
+ * https://www.intel.com/content/dam/www/public/us/en/documents/white-papers/fast-crc-computation-generic-polynomials-pclmulqdq-paper.pdf
+ *
+ * Copyright (C) 2013 Intel Corporation. All rights reserved.
+ * Copyright (C) 2016 Marian Beermann (support for initial value)
+ * Authors:
+ * Wajdi Feghali <wajdi.k.feghali@intel.com>
+ * Jim Guilford <james.guilford@intel.com>
+ * Vinodh Gopal <vinodh.gopal@intel.com>
+ * Erdinc Ozturk <erdinc.ozturk@intel.com>
+ * Jim Kukunas <james.t.kukunas@linux.intel.com>
+ *
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#ifdef X86_PCLMULQDQ_CRC
+
+#ifdef COPY
+Z_INTERNAL void crc32_fold_pclmulqdq_copy(crc32_fold *crc, uint8_t *dst, const uint8_t *src, size_t len) {
+#else
+Z_INTERNAL void crc32_fold_pclmulqdq(crc32_fold *crc, const uint8_t *src, size_t len, uint32_t init_crc) {
+#endif
+ unsigned long algn_diff;
+ __m128i xmm_t0, xmm_t1, xmm_t2, xmm_t3;
+ __m128i xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3;
+ __m128i xmm_crc_part = _mm_setzero_si128();
+#ifdef COPY
+ char ALIGNED_(16) partial_buf[16] = { 0 };
+#else
+ __m128i xmm_initial = _mm_cvtsi32_si128(init_crc);
+ int32_t first = init_crc != 0;
+
+ /* Technically the CRC functions don't even call this for input < 64, but a bare minimum of 31
+ * bytes of input is needed for the aligning load that occurs. If there's an initial CRC, to
+ * carry it forward through the folded CRC there must be 16 - src % 16 + 16 bytes available, which
+ * by definition can be up to 15 bytes + one full vector load. */
+ assert(len >= 31 || first == 0);
+#endif
+ crc32_fold_load((__m128i *)crc->fold, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+
+ if (len < 16) {
+#ifdef COPY
+ if (len == 0)
+ return;
+
+ memcpy(partial_buf, src, len);
+ xmm_crc_part = _mm_load_si128((const __m128i *)partial_buf);
+ memcpy(dst, partial_buf, len);
+#endif
+ goto partial;
+ }
+
+ algn_diff = ((uintptr_t)16 - ((uintptr_t)src & 0xF)) & 0xF;
+ if (algn_diff) {
+ xmm_crc_part = _mm_loadu_si128((__m128i *)src);
+#ifdef COPY
+ _mm_storeu_si128((__m128i *)dst, xmm_crc_part);
+ dst += algn_diff;
+#else
+ XOR_INITIAL(xmm_crc_part);
+
+ if (algn_diff < 4 && init_crc != 0) {
+ xmm_t0 = xmm_crc_part;
+ xmm_crc_part = _mm_loadu_si128((__m128i*)src + 1);
+ fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
+ src += 16;
+ len -= 16;
+ }
+#endif
+
+ partial_fold(algn_diff, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
+
+ src += algn_diff;
+ len -= algn_diff;
+ }
+
+#ifdef X86_VPCLMULQDQ_CRC
+ if (x86_cpu_has_vpclmulqdq && x86_cpu_has_avx512 && (len >= 256)) {
+#ifdef COPY
+ size_t n = fold_16_vpclmulqdq_copy(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, dst, src, len);
+ dst += n;
+#else
+ size_t n = fold_16_vpclmulqdq(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, src, len,
+ xmm_initial, first);
+ first = 0;
+#endif
+ len -= n;
+ src += n;
+ }
+#endif
+
+ while (len >= 64) {
+ len -= 64;
+ xmm_t0 = _mm_load_si128((__m128i *)src);
+ xmm_t1 = _mm_load_si128((__m128i *)src + 1);
+ xmm_t2 = _mm_load_si128((__m128i *)src + 2);
+ xmm_t3 = _mm_load_si128((__m128i *)src + 3);
+ src += 64;
+
+ fold_4(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+#ifdef COPY
+ _mm_storeu_si128((__m128i *)dst, xmm_t0);
+ _mm_storeu_si128((__m128i *)dst + 1, xmm_t1);
+ _mm_storeu_si128((__m128i *)dst + 2, xmm_t2);
+ _mm_storeu_si128((__m128i *)dst + 3, xmm_t3);
+ dst += 64;
+#else
+ XOR_INITIAL(xmm_t0);
+#endif
+
+ xmm_crc0 = _mm_xor_si128(xmm_crc0, xmm_t0);
+ xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t1);
+ xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t2);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t3);
+ }
+
+ /*
+ * len = num bytes left - 64
+ */
+ if (len >= 48) {
+ len -= 48;
+
+ xmm_t0 = _mm_load_si128((__m128i *)src);
+ xmm_t1 = _mm_load_si128((__m128i *)src + 1);
+ xmm_t2 = _mm_load_si128((__m128i *)src + 2);
+ src += 48;
+#ifdef COPY
+ _mm_storeu_si128((__m128i *)dst, xmm_t0);
+ _mm_storeu_si128((__m128i *)dst + 1, xmm_t1);
+ _mm_storeu_si128((__m128i *)dst + 2, xmm_t2);
+ dst += 48;
+#else
+ XOR_INITIAL(xmm_t0);
+#endif
+ fold_3(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+
+ xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t0);
+ xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t1);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t2);
+ } else if (len >= 32) {
+ len -= 32;
+
+ xmm_t0 = _mm_load_si128((__m128i *)src);
+ xmm_t1 = _mm_load_si128((__m128i *)src + 1);
+ src += 32;
+#ifdef COPY
+ _mm_storeu_si128((__m128i *)dst, xmm_t0);
+ _mm_storeu_si128((__m128i *)dst + 1, xmm_t1);
+ dst += 32;
+#else
+ XOR_INITIAL(xmm_t0);
+#endif
+ fold_2(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+
+ xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t0);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t1);
+ } else if (len >= 16) {
+ len -= 16;
+ xmm_t0 = _mm_load_si128((__m128i *)src);
+ src += 16;
+#ifdef COPY
+ _mm_storeu_si128((__m128i *)dst, xmm_t0);
+ dst += 16;
+#else
+ XOR_INITIAL(xmm_t0);
+#endif
+ fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
+ }
+
+partial:
+ if (len) {
+ memcpy(&xmm_crc_part, src, len);
+#ifdef COPY
+ _mm_storeu_si128((__m128i *)partial_buf, xmm_crc_part);
+ memcpy(dst, partial_buf, len);
+#endif
+ partial_fold((size_t)len, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
+ }
+
+ crc32_fold_save((__m128i *)crc->fold, xmm_crc0, xmm_crc1, xmm_crc2, xmm_crc3);
+}
+#endif
#include <immintrin.h>
-#define ONCE(op) if (first) { \
- first = 0; \
- (op); \
-}
-#define XOR_INITIAL(where) ONCE(where = _mm512_xor_si512(where, zmm_initial))
+#define ONCE(op) if (first) { first = 0; op; }
+#define XOR_INITIAL(where) ONCE(where = _mm512_xor_si512(where, zmm_initial))
-size_t fold_16_vpclmulqdq(__m128i *xmm_crc0, __m128i *xmm_crc1,
- __m128i *xmm_crc2, __m128i *xmm_crc3, uint8_t *dst, const uint8_t *src, size_t len) {
- size_t len_tmp = len;
- __m512i zmm_t0, zmm_t1, zmm_t2, zmm_t3;
- __m512i zmm_crc0, zmm_crc1, zmm_crc2, zmm_crc3;
- __m512i z0, z1, z2, z3;
- const __m512i zmm_fold4 = _mm512_set4_epi32(
- 0x00000001, 0x54442bd4, 0x00000001, 0xc6e41596);
- const __m512i zmm_fold16 = _mm512_set4_epi32(
- 0x00000001, 0x1542778a, 0x00000001, 0x322d1430);
+#include "crc32_fold_vpclmulqdq_tpl.h"
+#define COPY
+#include "crc32_fold_vpclmulqdq_tpl.h"
- // zmm register init
- zmm_crc0 = _mm512_setzero_si512();
- zmm_t0 = _mm512_loadu_si512((__m512i *)src);
- zmm_crc1 = _mm512_loadu_si512((__m512i *)src + 1);
- zmm_crc2 = _mm512_loadu_si512((__m512i *)src + 2);
- zmm_crc3 = _mm512_loadu_si512((__m512i *)src + 3);
-
- /* already have intermediate CRC in xmm registers
- * fold4 with 4 xmm_crc to get zmm_crc0
- */
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc0, 0);
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc1, 1);
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc2, 2);
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc3, 3);
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_t0);
-
- _mm512_storeu_si512((__m512i *)dst, zmm_t0);
- _mm512_storeu_si512((__m512i *)dst + 1, zmm_crc1);
- _mm512_storeu_si512((__m512i *)dst + 2, zmm_crc2);
- _mm512_storeu_si512((__m512i *)dst + 3, zmm_crc3);
- len -= 256;
- src += 256;
- dst += 256;
-
- // fold-16 loops
- while (len >= 256) {
- zmm_t0 = _mm512_loadu_si512((__m512i *)src);
- zmm_t1 = _mm512_loadu_si512((__m512i *)src + 1);
- zmm_t2 = _mm512_loadu_si512((__m512i *)src + 2);
- zmm_t3 = _mm512_loadu_si512((__m512i *)src + 3);
-
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold16, 0x01);
- z1 = _mm512_clmulepi64_epi128(zmm_crc1, zmm_fold16, 0x01);
- z2 = _mm512_clmulepi64_epi128(zmm_crc2, zmm_fold16, 0x01);
- z3 = _mm512_clmulepi64_epi128(zmm_crc3, zmm_fold16, 0x01);
-
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold16, 0x10);
- zmm_crc1 = _mm512_clmulepi64_epi128(zmm_crc1, zmm_fold16, 0x10);
- zmm_crc2 = _mm512_clmulepi64_epi128(zmm_crc2, zmm_fold16, 0x10);
- zmm_crc3 = _mm512_clmulepi64_epi128(zmm_crc3, zmm_fold16, 0x10);
-
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc1 = _mm512_xor_si512(z1, zmm_crc1);
- zmm_crc2 = _mm512_xor_si512(z2, zmm_crc2);
- zmm_crc3 = _mm512_xor_si512(z3, zmm_crc3);
-
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_t0);
- zmm_crc1 = _mm512_xor_si512(zmm_crc1, zmm_t1);
- zmm_crc2 = _mm512_xor_si512(zmm_crc2, zmm_t2);
- zmm_crc3 = _mm512_xor_si512(zmm_crc3, zmm_t3);
-
- _mm512_storeu_si512((__m512i *)dst, zmm_t0);
- _mm512_storeu_si512((__m512i *)dst + 1, zmm_t1);
- _mm512_storeu_si512((__m512i *)dst + 2, zmm_t2);
- _mm512_storeu_si512((__m512i *)dst + 3, zmm_t3);
- len -= 256;
- src += 256;
- dst += 256;
- }
- // zmm_crc[0,1,2,3] -> zmm_crc0
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc1);
-
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc2);
-
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc3);
-
- // zmm_crc0 -> xmm_crc[0, 1, 2, 3]
- *xmm_crc0 = _mm512_extracti32x4_epi32(zmm_crc0, 0);
- *xmm_crc1 = _mm512_extracti32x4_epi32(zmm_crc0, 1);
- *xmm_crc2 = _mm512_extracti32x4_epi32(zmm_crc0, 2);
- *xmm_crc3 = _mm512_extracti32x4_epi32(zmm_crc0, 3);
-
- return (len_tmp - len); // return n bytes processed
-}
-
-size_t fold_16_vpclmulqdq_nocp(__m128i *xmm_crc0, __m128i *xmm_crc1,
- __m128i *xmm_crc2, __m128i *xmm_crc3, const uint8_t *src, size_t len,
- __m128i init_crc, int32_t first) {
- size_t len_tmp = len;
- __m512i zmm_t0, zmm_t1, zmm_t2, zmm_t3;
- __m512i zmm_crc0, zmm_crc1, zmm_crc2, zmm_crc3;
- __m512i z0, z1, z2, z3;
- __m512i zmm_initial = _mm512_zextsi128_si512(init_crc);
- const __m512i zmm_fold4 = _mm512_set4_epi32(
- 0x00000001, 0x54442bd4, 0x00000001, 0xc6e41596);
- const __m512i zmm_fold16 = _mm512_set4_epi32(
- 0x00000001, 0x1542778a, 0x00000001, 0x322d1430);
-
- // zmm register init
- zmm_crc0 = _mm512_setzero_si512();
- zmm_t0 = _mm512_loadu_si512((__m512i *)src);
- XOR_INITIAL(zmm_t0);
- zmm_crc1 = _mm512_loadu_si512((__m512i *)src + 1);
- zmm_crc2 = _mm512_loadu_si512((__m512i *)src + 2);
- zmm_crc3 = _mm512_loadu_si512((__m512i *)src + 3);
-
- /* already have intermediate CRC in xmm registers
- * fold4 with 4 xmm_crc to get zmm_crc0
- */
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc0, 0);
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc1, 1);
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc2, 2);
- zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc3, 3);
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_t0);
-
- len -= 256;
- src += 256;
-
- // fold-16 loops
- while (len >= 256) {
- zmm_t0 = _mm512_loadu_si512((__m512i *)src);
- zmm_t1 = _mm512_loadu_si512((__m512i *)src + 1);
- zmm_t2 = _mm512_loadu_si512((__m512i *)src + 2);
- zmm_t3 = _mm512_loadu_si512((__m512i *)src + 3);
-
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold16, 0x01);
- z1 = _mm512_clmulepi64_epi128(zmm_crc1, zmm_fold16, 0x01);
- z2 = _mm512_clmulepi64_epi128(zmm_crc2, zmm_fold16, 0x01);
- z3 = _mm512_clmulepi64_epi128(zmm_crc3, zmm_fold16, 0x01);
-
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold16, 0x10);
- zmm_crc1 = _mm512_clmulepi64_epi128(zmm_crc1, zmm_fold16, 0x10);
- zmm_crc2 = _mm512_clmulepi64_epi128(zmm_crc2, zmm_fold16, 0x10);
- zmm_crc3 = _mm512_clmulepi64_epi128(zmm_crc3, zmm_fold16, 0x10);
-
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc1 = _mm512_xor_si512(z1, zmm_crc1);
- zmm_crc2 = _mm512_xor_si512(z2, zmm_crc2);
- zmm_crc3 = _mm512_xor_si512(z3, zmm_crc3);
-
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_t0);
- zmm_crc1 = _mm512_xor_si512(zmm_crc1, zmm_t1);
- zmm_crc2 = _mm512_xor_si512(zmm_crc2, zmm_t2);
- zmm_crc3 = _mm512_xor_si512(zmm_crc3, zmm_t3);
-
- len -= 256;
- src += 256;
- }
- // zmm_crc[0,1,2,3] -> zmm_crc0
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc1);
-
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc2);
-
- z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
- zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
- zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
- zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc3);
-
- // zmm_crc0 -> xmm_crc[0, 1, 2, 3]
- *xmm_crc0 = _mm512_extracti32x4_epi32(zmm_crc0, 0);
- *xmm_crc1 = _mm512_extracti32x4_epi32(zmm_crc0, 1);
- *xmm_crc2 = _mm512_extracti32x4_epi32(zmm_crc0, 2);
- *xmm_crc3 = _mm512_extracti32x4_epi32(zmm_crc0, 3);
-
- return (len_tmp - len); // return n bytes processed
-}
#endif
--- /dev/null
+/* crc32_fold_vpclmulqdq_tpl.h -- VPCMULQDQ-based CRC32 folding template.
+ * Copyright Wangyang Guo (wangyang.guo@intel.com)
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#ifdef COPY
+size_t fold_16_vpclmulqdq_copy(__m128i *xmm_crc0, __m128i *xmm_crc1,
+ __m128i *xmm_crc2, __m128i *xmm_crc3, uint8_t *dst, const uint8_t *src, size_t len) {
+#else
+size_t fold_16_vpclmulqdq(__m128i *xmm_crc0, __m128i *xmm_crc1,
+ __m128i *xmm_crc2, __m128i *xmm_crc3, const uint8_t *src, size_t len,
+ __m128i init_crc, int32_t first) {
+ __m512i zmm_initial = _mm512_zextsi128_si512(init_crc);
+#endif
+ __m512i zmm_t0, zmm_t1, zmm_t2, zmm_t3;
+ __m512i zmm_crc0, zmm_crc1, zmm_crc2, zmm_crc3;
+ __m512i z0, z1, z2, z3;
+ size_t len_tmp = len;
+ const __m512i zmm_fold4 = _mm512_set4_epi32(
+ 0x00000001, 0x54442bd4, 0x00000001, 0xc6e41596);
+ const __m512i zmm_fold16 = _mm512_set4_epi32(
+ 0x00000001, 0x1542778a, 0x00000001, 0x322d1430);
+
+ // zmm register init
+ zmm_crc0 = _mm512_setzero_si512();
+ zmm_t0 = _mm512_loadu_si512((__m512i *)src);
+#ifndef COPY
+ XOR_INITIAL(zmm_t0);
+#endif
+ zmm_crc1 = _mm512_loadu_si512((__m512i *)src + 1);
+ zmm_crc2 = _mm512_loadu_si512((__m512i *)src + 2);
+ zmm_crc3 = _mm512_loadu_si512((__m512i *)src + 3);
+
+ /* already have intermediate CRC in xmm registers
+ * fold4 with 4 xmm_crc to get zmm_crc0
+ */
+ zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc0, 0);
+ zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc1, 1);
+ zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc2, 2);
+ zmm_crc0 = _mm512_inserti32x4(zmm_crc0, *xmm_crc3, 3);
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
+ zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
+ zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_t0);
+
+#ifdef COPY
+ _mm512_storeu_si512((__m512i *)dst, zmm_t0);
+ _mm512_storeu_si512((__m512i *)dst + 1, zmm_crc1);
+ _mm512_storeu_si512((__m512i *)dst + 2, zmm_crc2);
+ _mm512_storeu_si512((__m512i *)dst + 3, zmm_crc3);
+ dst += 256;
+#endif
+ len -= 256;
+ src += 256;
+
+ // fold-16 loops
+ while (len >= 256) {
+ zmm_t0 = _mm512_loadu_si512((__m512i *)src);
+ zmm_t1 = _mm512_loadu_si512((__m512i *)src + 1);
+ zmm_t2 = _mm512_loadu_si512((__m512i *)src + 2);
+ zmm_t3 = _mm512_loadu_si512((__m512i *)src + 3);
+
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold16, 0x01);
+ z1 = _mm512_clmulepi64_epi128(zmm_crc1, zmm_fold16, 0x01);
+ z2 = _mm512_clmulepi64_epi128(zmm_crc2, zmm_fold16, 0x01);
+ z3 = _mm512_clmulepi64_epi128(zmm_crc3, zmm_fold16, 0x01);
+
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold16, 0x10);
+ zmm_crc1 = _mm512_clmulepi64_epi128(zmm_crc1, zmm_fold16, 0x10);
+ zmm_crc2 = _mm512_clmulepi64_epi128(zmm_crc2, zmm_fold16, 0x10);
+ zmm_crc3 = _mm512_clmulepi64_epi128(zmm_crc3, zmm_fold16, 0x10);
+
+ zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
+ zmm_crc1 = _mm512_xor_si512(z1, zmm_crc1);
+ zmm_crc2 = _mm512_xor_si512(z2, zmm_crc2);
+ zmm_crc3 = _mm512_xor_si512(z3, zmm_crc3);
+
+ zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_t0);
+ zmm_crc1 = _mm512_xor_si512(zmm_crc1, zmm_t1);
+ zmm_crc2 = _mm512_xor_si512(zmm_crc2, zmm_t2);
+ zmm_crc3 = _mm512_xor_si512(zmm_crc3, zmm_t3);
+
+#ifdef COPY
+ _mm512_storeu_si512((__m512i *)dst, zmm_t0);
+ _mm512_storeu_si512((__m512i *)dst + 1, zmm_t1);
+ _mm512_storeu_si512((__m512i *)dst + 2, zmm_t2);
+ _mm512_storeu_si512((__m512i *)dst + 3, zmm_t3);
+ dst += 256;
+#endif
+ len -= 256;
+ src += 256;
+ }
+ // zmm_crc[0,1,2,3] -> zmm_crc0
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
+ zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
+ zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc1);
+
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
+ zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
+ zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc2);
+
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
+ zmm_crc0 = _mm512_xor_si512(z0, zmm_crc0);
+ zmm_crc0 = _mm512_xor_si512(zmm_crc0, zmm_crc3);
+
+ // zmm_crc0 -> xmm_crc[0, 1, 2, 3]
+ *xmm_crc0 = _mm512_extracti32x4_epi32(zmm_crc0, 0);
+ *xmm_crc1 = _mm512_extracti32x4_epi32(zmm_crc0, 1);
+ *xmm_crc2 = _mm512_extracti32x4_epi32(zmm_crc0, 2);
+ *xmm_crc3 = _mm512_extracti32x4_epi32(zmm_crc0, 3);
+
+ return (len_tmp - len); // return n bytes processed
+}
/* CRC32 folding */
#ifdef X86_PCLMULQDQ_CRC
-extern uint32_t crc32_fold_reset_pclmulqdq(crc32_fold *crc);
-extern void crc32_fold_copy_pclmulqdq(crc32_fold *crc, uint8_t *dst, const uint8_t *src, size_t len);
+extern uint32_t crc32_fold_pclmulqdq_reset(crc32_fold *crc);
+extern void crc32_fold_pclmulqdq_copy(crc32_fold *crc, uint8_t *dst, const uint8_t *src, size_t len);
extern void crc32_fold_pclmulqdq(crc32_fold *crc, const uint8_t *src, size_t len, uint32_t init_crc);
-extern uint32_t crc32_fold_final_pclmulqdq(crc32_fold *crc);
+extern uint32_t crc32_fold_pclmulqdq_final(crc32_fold *crc);
extern uint32_t crc32_pclmulqdq(uint32_t crc32, const unsigned char* buf, uint64_t len);
#endif
#ifndef CRC32_FOLD_H_
#define CRC32_FOLD_H_
-#define CRC32_FOLD_BUFFER_SIZE (16 * 5)
-/* sizeof(__m128i) * (4 folds & 1 partial fold) */
+#define CRC32_FOLD_BUFFER_SIZE (16 * 4)
+/* sizeof(__m128i) * (4 folds) */
typedef struct crc32_fold_s {
uint8_t fold[CRC32_FOLD_BUFFER_SIZE];
cpu_check_features();
#ifdef X86_PCLMULQDQ_CRC
if (x86_cpu_has_pclmulqdq)
- functable.crc32_fold_reset = &crc32_fold_reset_pclmulqdq;
+ functable.crc32_fold_reset = &crc32_fold_pclmulqdq_reset;
#endif
return functable.crc32_fold_reset(crc);
}
cpu_check_features();
#ifdef X86_PCLMULQDQ_CRC
if (x86_cpu_has_pclmulqdq)
- functable.crc32_fold_copy = &crc32_fold_copy_pclmulqdq;
+ functable.crc32_fold_copy = &crc32_fold_pclmulqdq_copy;
#endif
functable.crc32_fold_copy(crc, dst, src, len);
}
cpu_check_features();
#ifdef X86_PCLMULQDQ_CRC
if (x86_cpu_has_pclmulqdq)
- functable.crc32_fold_final = &crc32_fold_final_pclmulqdq;
+ functable.crc32_fold_final = &crc32_fold_pclmulqdq_final;
#endif
return functable.crc32_fold_final(crc);
}
projects / thirdparty / zlib-ng.git / commitdiff
