-/*
- * Compute the CRC32 using a parallelized folding approach with the PCLMULQDQ
- * instruction.
+/* crc32_fold_pclmulqdq_tpl.h -- Compute the CRC32 using a parallelized folding
+ * approach with the PCLMULQDQ and VPCMULQDQ instructions.
*
* A white paper describing this algorithm can be found at:
* doc/crc-pclmulqdq.pdf
*
+ * Copyright (C) 2020 Wangyang Guo (wangyang.guo@intel.com) (VPCLMULQDQ support)
* Copyright (C) 2013 Intel Corporation. All rights reserved.
* Copyright (C) 2016 Marian Beermann (support for initial value)
* Authors:
* For conditions of distribution and use, see copyright notice in zlib.h
*/
-#ifdef COPY
-Z_INTERNAL void CRC32_FOLD_COPY(crc32_fold *crc, uint8_t *dst, const uint8_t *src, size_t len) {
-#else
-Z_INTERNAL void CRC32_FOLD(crc32_fold *crc, const uint8_t *src, size_t len, uint32_t init_crc) {
+#include "zbuild.h"
+
+#include <immintrin.h>
+#include <wmmintrin.h>
+#include <smmintrin.h> // _mm_extract_epi32
+
+#include "crc32.h"
+#include "crc32_braid_p.h"
+#include "crc32_braid_tbl.h"
+#include "x86_intrins.h"
+
+static const unsigned ALIGNED_(16) crc_k[] = {
+ 0xccaa009e, 0x00000000, /* rk1 */
+ 0x751997d0, 0x00000001, /* rk2 */
+ 0xccaa009e, 0x00000000, /* rk5 */
+ 0x63cd6124, 0x00000001, /* rk6 */
+ 0xf7011640, 0x00000001, /* rk7 */
+ 0xdb710640, 0x00000001 /* rk8 */
+};
+
+static const unsigned ALIGNED_(16) crc_mask[4] = {
+ 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000
+};
+
+static const unsigned ALIGNED_(16) crc_mask2[4] = {
+ 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
+};
+
+#define ONCE(op) if (first) { first = 0; op; }
+#define XOR_INITIAL128(where) ONCE(where = _mm_xor_si128(where, xmm_initial))
+
+static void fold_1(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
+ const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
+ 0x00000001, 0xc6e41596);
+ __m128i x_tmp3;
+ __m128 ps_crc0, ps_crc3, ps_res;
+
+ x_tmp3 = *xmm_crc3;
+
+ *xmm_crc3 = *xmm_crc0;
+ *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
+ *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x10);
+ ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
+ ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
+ ps_res = _mm_xor_ps(ps_crc0, ps_crc3);
+
+ *xmm_crc0 = *xmm_crc1;
+ *xmm_crc1 = *xmm_crc2;
+ *xmm_crc2 = x_tmp3;
+ *xmm_crc3 = _mm_castps_si128(ps_res);
+}
+
+static void fold_2(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
+ const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
+ 0x00000001, 0xc6e41596);
+ __m128i x_tmp3, x_tmp2;
+ __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3, ps_res31, ps_res20;
+
+ x_tmp3 = *xmm_crc3;
+ x_tmp2 = *xmm_crc2;
+
+ *xmm_crc3 = *xmm_crc1;
+ *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x01);
+ *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x10);
+ ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
+ ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
+ ps_res31 = _mm_xor_ps(ps_crc3, ps_crc1);
+
+ *xmm_crc2 = *xmm_crc0;
+ *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
+ *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x10);
+ ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
+ ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
+ ps_res20 = _mm_xor_ps(ps_crc0, ps_crc2);
+
+ *xmm_crc0 = x_tmp2;
+ *xmm_crc1 = x_tmp3;
+ *xmm_crc2 = _mm_castps_si128(ps_res20);
+ *xmm_crc3 = _mm_castps_si128(ps_res31);
+}
+
+static void fold_3(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
+ const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
+ 0x00000001, 0xc6e41596);
+ __m128i x_tmp3;
+ __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3, ps_res32, ps_res21, ps_res10;
+
+ x_tmp3 = *xmm_crc3;
+
+ *xmm_crc3 = *xmm_crc2;
+ *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x01);
+ *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x10);
+ ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
+ ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
+ ps_res32 = _mm_xor_ps(ps_crc2, ps_crc3);
+
+ *xmm_crc2 = *xmm_crc1;
+ *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x01);
+ *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x10);
+ ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
+ ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
+ ps_res21 = _mm_xor_ps(ps_crc1, ps_crc2);
+
+ *xmm_crc1 = *xmm_crc0;
+ *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
+ *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x10);
+ ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
+ ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
+ ps_res10 = _mm_xor_ps(ps_crc0, ps_crc1);
+
+ *xmm_crc0 = x_tmp3;
+ *xmm_crc1 = _mm_castps_si128(ps_res10);
+ *xmm_crc2 = _mm_castps_si128(ps_res21);
+ *xmm_crc3 = _mm_castps_si128(ps_res32);
+}
+
+static void fold_4(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
+ const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
+ 0x00000001, 0xc6e41596);
+ __m128i x_tmp0, x_tmp1, x_tmp2, x_tmp3;
+ __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3;
+ __m128 ps_t0, ps_t1, ps_t2, ps_t3;
+ __m128 ps_res0, ps_res1, ps_res2, ps_res3;
+
+ x_tmp0 = *xmm_crc0;
+ x_tmp1 = *xmm_crc1;
+ x_tmp2 = *xmm_crc2;
+ x_tmp3 = *xmm_crc3;
+
+ *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
+ x_tmp0 = _mm_clmulepi64_si128(x_tmp0, xmm_fold4, 0x10);
+ ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
+ ps_t0 = _mm_castsi128_ps(x_tmp0);
+ ps_res0 = _mm_xor_ps(ps_crc0, ps_t0);
+
+ *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x01);
+ x_tmp1 = _mm_clmulepi64_si128(x_tmp1, xmm_fold4, 0x10);
+ ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
+ ps_t1 = _mm_castsi128_ps(x_tmp1);
+ ps_res1 = _mm_xor_ps(ps_crc1, ps_t1);
+
+ *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x01);
+ x_tmp2 = _mm_clmulepi64_si128(x_tmp2, xmm_fold4, 0x10);
+ ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
+ ps_t2 = _mm_castsi128_ps(x_tmp2);
+ ps_res2 = _mm_xor_ps(ps_crc2, ps_t2);
+
+ *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x01);
+ x_tmp3 = _mm_clmulepi64_si128(x_tmp3, xmm_fold4, 0x10);
+ ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
+ ps_t3 = _mm_castsi128_ps(x_tmp3);
+ ps_res3 = _mm_xor_ps(ps_crc3, ps_t3);
+
+ *xmm_crc0 = _mm_castps_si128(ps_res0);
+ *xmm_crc1 = _mm_castps_si128(ps_res1);
+ *xmm_crc2 = _mm_castps_si128(ps_res2);
+ *xmm_crc3 = _mm_castps_si128(ps_res3);
+}
+
+static void fold_12(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
+ const __m128i xmm_fold12 = _mm_set_epi64x(0x596C8D81, 0xF5E48C85);
+ __m128i x_tmp0, x_tmp1, x_tmp2, x_tmp3;
+ __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3;
+ __m128 ps_t0, ps_t1, ps_t2, ps_t3;
+ __m128 ps_res0, ps_res1, ps_res2, ps_res3;
+
+ x_tmp0 = *xmm_crc0;
+ x_tmp1 = *xmm_crc1;
+ x_tmp2 = *xmm_crc2;
+ x_tmp3 = *xmm_crc3;
+
+ *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold12, 0x01);
+ x_tmp0 = _mm_clmulepi64_si128(x_tmp0, xmm_fold12, 0x10);
+ ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
+ ps_t0 = _mm_castsi128_ps(x_tmp0);
+ ps_res0 = _mm_xor_ps(ps_crc0, ps_t0);
+
+ *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold12, 0x01);
+ x_tmp1 = _mm_clmulepi64_si128(x_tmp1, xmm_fold12, 0x10);
+ ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
+ ps_t1 = _mm_castsi128_ps(x_tmp1);
+ ps_res1 = _mm_xor_ps(ps_crc1, ps_t1);
+
+ *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold12, 0x01);
+ x_tmp2 = _mm_clmulepi64_si128(x_tmp2, xmm_fold12, 0x10);
+ ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
+ ps_t2 = _mm_castsi128_ps(x_tmp2);
+ ps_res2 = _mm_xor_ps(ps_crc2, ps_t2);
+
+ *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold12, 0x01);
+ x_tmp3 = _mm_clmulepi64_si128(x_tmp3, xmm_fold12, 0x10);
+ ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
+ ps_t3 = _mm_castsi128_ps(x_tmp3);
+ ps_res3 = _mm_xor_ps(ps_crc3, ps_t3);
+
+ *xmm_crc0 = _mm_castps_si128(ps_res0);
+ *xmm_crc1 = _mm_castps_si128(ps_res1);
+ *xmm_crc2 = _mm_castps_si128(ps_res2);
+ *xmm_crc3 = _mm_castps_si128(ps_res3);
+}
+
+#ifdef X86_VPCLMULQDQ
+
+#define XOR_INITIAL512(where) ONCE(where = _mm512_xor_si512(where, zmm_initial))
+
+static size_t fold_16(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3, uint8_t *dst,
+ const uint8_t *src, size_t len, __m128i init_crc, int32_t first, const int COPY) {
+ __m512i zmm_initial = _mm512_zextsi128_si512(init_crc);
+ __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);
+ if (!COPY) {
+ XOR_INITIAL512(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_ternarylogic_epi32(zmm_crc0, z0, zmm_t0, 0x96);
+
+ if (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;
+ }
+ 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_ternarylogic_epi32(zmm_crc0, z0, zmm_t0, 0x96);
+ zmm_crc1 = _mm512_ternarylogic_epi32(zmm_crc1, z1, zmm_t1, 0x96);
+ zmm_crc2 = _mm512_ternarylogic_epi32(zmm_crc2, z2, zmm_t2, 0x96);
+ zmm_crc3 = _mm512_ternarylogic_epi32(zmm_crc3, z3, zmm_t3, 0x96);
+
+ if (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;
+ }
+ 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_ternarylogic_epi32(zmm_crc0, z0, zmm_crc1, 0x96);
+
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
+ zmm_crc0 = _mm512_ternarylogic_epi32(zmm_crc0, z0, zmm_crc2, 0x96);
+
+ z0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x01);
+ zmm_crc0 = _mm512_clmulepi64_epi128(zmm_crc0, zmm_fold4, 0x10);
+ zmm_crc0 = _mm512_ternarylogic_epi32(zmm_crc0, z0, zmm_crc3, 0x96);
+
+ // 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
+
+static const unsigned ALIGNED_(32) pshufb_shf_table[60] = {
+ 0x84838281, 0x88878685, 0x8c8b8a89, 0x008f8e8d, /* shl 15 (16 - 1)/shr1 */
+ 0x85848382, 0x89888786, 0x8d8c8b8a, 0x01008f8e, /* shl 14 (16 - 3)/shr2 */
+ 0x86858483, 0x8a898887, 0x8e8d8c8b, 0x0201008f, /* shl 13 (16 - 4)/shr3 */
+ 0x87868584, 0x8b8a8988, 0x8f8e8d8c, 0x03020100, /* shl 12 (16 - 4)/shr4 */
+ 0x88878685, 0x8c8b8a89, 0x008f8e8d, 0x04030201, /* shl 11 (16 - 5)/shr5 */
+ 0x89888786, 0x8d8c8b8a, 0x01008f8e, 0x05040302, /* shl 10 (16 - 6)/shr6 */
+ 0x8a898887, 0x8e8d8c8b, 0x0201008f, 0x06050403, /* shl 9 (16 - 7)/shr7 */
+ 0x8b8a8988, 0x8f8e8d8c, 0x03020100, 0x07060504, /* shl 8 (16 - 8)/shr8 */
+ 0x8c8b8a89, 0x008f8e8d, 0x04030201, 0x08070605, /* shl 7 (16 - 9)/shr9 */
+ 0x8d8c8b8a, 0x01008f8e, 0x05040302, 0x09080706, /* shl 6 (16 -10)/shr10*/
+ 0x8e8d8c8b, 0x0201008f, 0x06050403, 0x0a090807, /* shl 5 (16 -11)/shr11*/
+ 0x8f8e8d8c, 0x03020100, 0x07060504, 0x0b0a0908, /* shl 4 (16 -12)/shr12*/
+ 0x008f8e8d, 0x04030201, 0x08070605, 0x0c0b0a09, /* shl 3 (16 -13)/shr13*/
+ 0x01008f8e, 0x05040302, 0x09080706, 0x0d0c0b0a, /* shl 2 (16 -14)/shr14*/
+ 0x0201008f, 0x06050403, 0x0a090807, 0x0e0d0c0b /* shl 1 (16 -15)/shr15*/
+};
+
+static void partial_fold(const size_t len, __m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2,
+ __m128i *xmm_crc3, __m128i *xmm_crc_part) {
+ const __m128i xmm_fold4 = _mm_set_epi32(0x00000001, 0x54442bd4,
+ 0x00000001, 0xc6e41596);
+ const __m128i xmm_mask3 = _mm_set1_epi32((int32_t)0x80808080);
+
+ __m128i xmm_shl, xmm_shr, xmm_tmp1, xmm_tmp2, xmm_tmp3;
+ __m128i xmm_a0_0, xmm_a0_1;
+ __m128 ps_crc3, psa0_0, psa0_1, ps_res;
+
+ xmm_shl = _mm_load_si128((__m128i *)(pshufb_shf_table + (4 * (len - 1))));
+ xmm_shr = xmm_shl;
+ xmm_shr = _mm_xor_si128(xmm_shr, xmm_mask3);
+
+ xmm_a0_0 = _mm_shuffle_epi8(*xmm_crc0, xmm_shl);
+
+ *xmm_crc0 = _mm_shuffle_epi8(*xmm_crc0, xmm_shr);
+ xmm_tmp1 = _mm_shuffle_epi8(*xmm_crc1, xmm_shl);
+ *xmm_crc0 = _mm_or_si128(*xmm_crc0, xmm_tmp1);
+
+ *xmm_crc1 = _mm_shuffle_epi8(*xmm_crc1, xmm_shr);
+ xmm_tmp2 = _mm_shuffle_epi8(*xmm_crc2, xmm_shl);
+ *xmm_crc1 = _mm_or_si128(*xmm_crc1, xmm_tmp2);
+
+ *xmm_crc2 = _mm_shuffle_epi8(*xmm_crc2, xmm_shr);
+ xmm_tmp3 = _mm_shuffle_epi8(*xmm_crc3, xmm_shl);
+ *xmm_crc2 = _mm_or_si128(*xmm_crc2, xmm_tmp3);
+
+ *xmm_crc3 = _mm_shuffle_epi8(*xmm_crc3, xmm_shr);
+ *xmm_crc_part = _mm_shuffle_epi8(*xmm_crc_part, xmm_shl);
+ *xmm_crc3 = _mm_or_si128(*xmm_crc3, *xmm_crc_part);
+
+ xmm_a0_1 = _mm_clmulepi64_si128(xmm_a0_0, xmm_fold4, 0x10);
+ xmm_a0_0 = _mm_clmulepi64_si128(xmm_a0_0, xmm_fold4, 0x01);
+
+ ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
+ psa0_0 = _mm_castsi128_ps(xmm_a0_0);
+ psa0_1 = _mm_castsi128_ps(xmm_a0_1);
+
+ ps_res = _mm_xor_ps(ps_crc3, psa0_0);
+ ps_res = _mm_xor_ps(ps_res, psa0_1);
+
+ *xmm_crc3 = _mm_castps_si128(ps_res);
+}
+
+static inline uint32_t crc32_small(uint32_t crc, const uint8_t *buf, size_t len) {
+ uint32_t c = (~crc) & 0xffffffff;
+
+ while (len) {
+ len--;
+ CRC_DO1;
+ }
+
+ return c ^ 0xffffffff;
+}
+
+static inline void crc32_fold_load(__m128i *fold, __m128i *fold0, __m128i *fold1, __m128i *fold2, __m128i *fold3) {
+ *fold0 = _mm_load_si128(fold + 0);
+ *fold1 = _mm_load_si128(fold + 1);
+ *fold2 = _mm_load_si128(fold + 2);
+ *fold3 = _mm_load_si128(fold + 3);
+}
+
+static inline void crc32_fold_save(__m128i *fold, const __m128i *fold0, const __m128i *fold1,
+ const __m128i *fold2, const __m128i *fold3) {
+ _mm_storeu_si128(fold + 0, *fold0);
+ _mm_storeu_si128(fold + 1, *fold1);
+ _mm_storeu_si128(fold + 2, *fold2);
+ _mm_storeu_si128(fold + 3, *fold3);
+}
+
+static inline uint32_t crc32_fold_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;
+}
+
+static inline uint32_t crc32_fold_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;
+ __m128i x_tmp0, x_tmp1, x_tmp2, crc_fold;
+
+ crc32_fold_load((__m128i *)crc->fold, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+
+ /*
+ * k1
+ */
+ crc_fold = _mm_load_si128((__m128i *)crc_k);
+
+ x_tmp0 = _mm_clmulepi64_si128(xmm_crc0, crc_fold, 0x10);
+ xmm_crc0 = _mm_clmulepi64_si128(xmm_crc0, crc_fold, 0x01);
+ xmm_crc1 = _mm_xor_si128(xmm_crc1, x_tmp0);
+ xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_crc0);
+
+ x_tmp1 = _mm_clmulepi64_si128(xmm_crc1, crc_fold, 0x10);
+ xmm_crc1 = _mm_clmulepi64_si128(xmm_crc1, crc_fold, 0x01);
+ xmm_crc2 = _mm_xor_si128(xmm_crc2, x_tmp1);
+ xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_crc1);
+
+ x_tmp2 = _mm_clmulepi64_si128(xmm_crc2, crc_fold, 0x10);
+ xmm_crc2 = _mm_clmulepi64_si128(xmm_crc2, crc_fold, 0x01);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, x_tmp2);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc2);
+
+ /*
+ * k5
+ */
+ crc_fold = _mm_load_si128((__m128i *)(crc_k + 4));
+
+ xmm_crc0 = xmm_crc3;
+ xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0);
+ xmm_crc0 = _mm_srli_si128(xmm_crc0, 8);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc0);
+
+ xmm_crc0 = xmm_crc3;
+ xmm_crc3 = _mm_slli_si128(xmm_crc3, 4);
+ xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0x10);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc0);
+ xmm_crc3 = _mm_and_si128(xmm_crc3, xmm_mask2);
+
+ /*
+ * k7
+ */
+ xmm_crc1 = xmm_crc3;
+ xmm_crc2 = xmm_crc3;
+ crc_fold = _mm_load_si128((__m128i *)(crc_k + 8));
+
+ xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc2);
+ xmm_crc3 = _mm_and_si128(xmm_crc3, xmm_mask);
+
+ xmm_crc2 = xmm_crc3;
+ xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0x10);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc2);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc1);
+
+ crc->value = ~((uint32_t)_mm_extract_epi32(xmm_crc3, 2));
+
+ return crc->value;
+}
+
+static inline void crc32_fold_copy(crc32_fold *crc, uint8_t *dst, const uint8_t *src, size_t len, uint32_t init_crc, const int COPY) {
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();
char ALIGNED_(16) partial_buf[16] = { 0 };
-#ifndef COPY
__m128i xmm_initial = _mm_cvtsi32_si128(init_crc);
int32_t first = init_crc != 0;
- /* The CRC functions don't call this for input < 16, as a minimum of 16 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 >= 16 || first == 0);
-#endif
+ if (!COPY) {
+ /* The CRC functions don't call this for input < 16, as a minimum of 16 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 >= 16 || first == 0, "Insufficient data for initial CRC");
+ }
crc32_fold_load((__m128i *)crc->fold, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
if (len < 16) {
memcpy(partial_buf, src, len);
xmm_crc_part = _mm_load_si128((const __m128i *)partial_buf);
-#ifdef COPY
- memcpy(dst, partial_buf, len);
-#endif
+ if (COPY) {
+ 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);
-#ifdef COPY
- _mm_storeu_si128((__m128i *)dst, xmm_crc_part);
- dst += algn_diff;
-#else
- XOR_INITIAL128(xmm_crc_part);
-
- if (algn_diff < 4 && init_crc != 0) {
- xmm_t0 = xmm_crc_part;
- if (len >= 32) {
- 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);
- } else {
- memcpy(partial_buf, src + 16, len - 16);
- xmm_crc_part = _mm_load_si128((__m128i*)partial_buf);
- fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
+ if (COPY) {
+ _mm_storeu_si128((__m128i *)dst, xmm_crc_part);
+ dst += algn_diff;
+ } else {
+ XOR_INITIAL128(xmm_crc_part);
+
+ if (algn_diff < 4 && init_crc != 0) {
+ xmm_t0 = xmm_crc_part;
+ if (len >= 32) {
+ 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);
+ } else {
+ memcpy(partial_buf, src + 16, len - 16);
+ xmm_crc_part = _mm_load_si128((__m128i*)partial_buf);
+ fold_1(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
+ xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_t0);
+ src += 16;
+ len -= 16;
+ if (COPY) {
+ dst -= algn_diff;
+ }
+ goto partial;
+ }
+
src += 16;
len -= 16;
-#ifdef COPY
- dst -= algn_diff;
-#endif
- goto partial;
}
-
- src += 16;
- len -= 16;
}
-#endif
partial_fold(algn_diff, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
#ifdef X86_VPCLMULQDQ
if (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
+ size_t n;
+ if (COPY) {
+ n = fold_16(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, dst, src, len, xmm_initial, first, 1);
+ dst += n;
+ } else {
+ n = fold_16(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, dst, src, len, xmm_initial, first, 0);
+ first = 0;
+ }
len -= n;
src += n;
}
* the stream at the following offsets: 6, 9, 10, 16, 20, 22,
* 24, 25, 27, 28, 30, 31, 32 - this is detailed in the paper
* as "generator_64_bits_unrolled_8" */
-#if !defined(COPY) || defined(__AVX512VL__)
+#ifndef __AVX512VL__
+ if (!COPY) {
+#endif
while (len >= 512 + 64 + 16*8) {
__m128i chorba8 = _mm_load_si128((__m128i *)src);
__m128i chorba7 = _mm_load_si128((__m128i *)src + 1);
__m128i chorba3 = _mm_load_si128((__m128i *)src + 5);
__m128i chorba2 = _mm_load_si128((__m128i *)src + 6);
__m128i chorba1 = _mm_load_si128((__m128i *)src + 7);
-#ifdef COPY
- _mm_storeu_si128((__m128i *)dst, chorba8);
- _mm_storeu_si128((__m128i *)dst + 1, chorba7);
- _mm_storeu_si128((__m128i *)dst + 2, chorba6);
- _mm_storeu_si128((__m128i *)dst + 3, chorba5);
- _mm_storeu_si128((__m128i *)dst + 4, chorba4);
- _mm_storeu_si128((__m128i *)dst + 5, chorba3);
- _mm_storeu_si128((__m128i *)dst + 6, chorba2);
- _mm_storeu_si128((__m128i *)dst + 7, chorba1);
- dst += 16*8;
-#else
- XOR_INITIAL128(chorba8);
-#endif
+ if (COPY) {
+ _mm_storeu_si128((__m128i *)dst, chorba8);
+ _mm_storeu_si128((__m128i *)dst + 1, chorba7);
+ _mm_storeu_si128((__m128i *)dst + 2, chorba6);
+ _mm_storeu_si128((__m128i *)dst + 3, chorba5);
+ _mm_storeu_si128((__m128i *)dst + 4, chorba4);
+ _mm_storeu_si128((__m128i *)dst + 5, chorba3);
+ _mm_storeu_si128((__m128i *)dst + 6, chorba2);
+ _mm_storeu_si128((__m128i *)dst + 7, chorba1);
+ dst += 16*8;
+ } else {
+ XOR_INITIAL128(chorba8);
+ }
chorba2 = _mm_xor_si128(chorba2, chorba8);
chorba1 = _mm_xor_si128(chorba1, chorba7);
src += 16*8;
xmm_t3 = _mm_load_si128((__m128i *)src + 3);
fold_12(&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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(xmm_t0, chorba6);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(xmm_t1, chorba5), chorba8);
xmm_t2 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t2, chorba4), chorba8), chorba7);
xmm_t3 = _mm_load_si128((__m128i *)src + 7);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t0, chorba2), chorba6), chorba5);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t1, chorba1), chorba4), chorba5);
xmm_t3 = _mm_load_si128((__m128i *)src + 11);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t0, chorba1), chorba2), chorba8);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(xmm_t1, chorba1), chorba7);
xmm_t3 = _mm_load_si128((__m128i *)src + 15);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(xmm_t0, chorba4), chorba8);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t1, chorba3), chorba8), chorba7);
xmm_t3 = _mm_load_si128((__m128i *)src + 19);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t0, chorba4), chorba8), chorba6), chorba5);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t1, chorba3), chorba4), chorba8), chorba7), chorba5);
xmm_t3 = _mm_load_si128((__m128i *)src + 23);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t0, chorba1), chorba2), chorba4), chorba8), chorba7), chorba5);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t1, chorba1), chorba3), chorba4), chorba7), chorba6);
xmm_t3 = _mm_load_si128((__m128i *)src + 27);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t0, chorba1), chorba3), chorba4), chorba8), chorba7), chorba6);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t1, chorba2), chorba3), chorba7), chorba6), chorba5);
xmm_t2 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t2, chorba1), chorba2), chorba4), chorba6), chorba5);
xmm_t3 = _mm_load_si128((__m128i *)src + 31);
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;
-#endif
+ if (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;
+ }
xmm_t0 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t0, chorba2), chorba3), chorba4);
xmm_t1 = _mm_xor_si128(_mm_xor_si128(_mm_xor_si128(xmm_t1, chorba1), chorba2), chorba3);
xmm_t2 = _mm_xor_si128(_mm_xor_si128(xmm_t2, chorba1), chorba2);
len -= 512;
src += 512;
}
+#ifndef __AVX512VL__
+ }
#endif
while (len >= 64) {
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_INITIAL128(xmm_t0);
-#endif
+ if (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_INITIAL128(xmm_t0);
+ }
xmm_crc0 = _mm_xor_si128(xmm_crc0, xmm_t0);
xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t1);
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_INITIAL128(xmm_t0);
-#endif
+ if (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_INITIAL128(xmm_t0);
+ }
fold_3(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_t0);
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_INITIAL128(xmm_t0);
-#endif
+ if (COPY) {
+ _mm_storeu_si128((__m128i *)dst, xmm_t0);
+ _mm_storeu_si128((__m128i *)dst + 1, xmm_t1);
+ dst += 32;
+ } else {
+ XOR_INITIAL128(xmm_t0);
+ }
fold_2(&xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_t0);
len -= 16;
xmm_t0 = _mm_load_si128((__m128i *)src);
src += 16;
-#ifdef COPY
- _mm_storeu_si128((__m128i *)dst, xmm_t0);
- dst += 16;
-#else
- XOR_INITIAL128(xmm_t0);
-#endif
+ if (COPY) {
+ _mm_storeu_si128((__m128i *)dst, xmm_t0);
+ dst += 16;
+ } else {
+ XOR_INITIAL128(xmm_t0);
+ }
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
+ if (COPY) {
+ _mm_storeu_si128((__m128i *)partial_buf, xmm_crc_part);
+ memcpy(dst, partial_buf, len);
+ }
partial_fold(len, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3, &xmm_crc_part);
}
+++ /dev/null
-/*
- * Compute the CRC32 using a parallelized folding approach with the PCLMULQDQ
- * instruction.
- *
- * A white paper describing this algorithm can be found at:
- * doc/crc-pclmulqdq.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
- */
-
-#include "zbuild.h"
-
-#include <immintrin.h>
-#include <wmmintrin.h>
-#include <smmintrin.h> // _mm_extract_epi32
-
-#include "crc32.h"
-#include "crc32_braid_p.h"
-#include "crc32_braid_tbl.h"
-#include "x86_intrins.h"
-#include <assert.h>
-
-#ifdef X86_VPCLMULQDQ
-static 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);
-static 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) {
- const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
- 0x00000001, 0xc6e41596);
- __m128i x_tmp3;
- __m128 ps_crc0, ps_crc3, ps_res;
-
- x_tmp3 = *xmm_crc3;
-
- *xmm_crc3 = *xmm_crc0;
- *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
- *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x10);
- ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
- ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
- ps_res = _mm_xor_ps(ps_crc0, ps_crc3);
-
- *xmm_crc0 = *xmm_crc1;
- *xmm_crc1 = *xmm_crc2;
- *xmm_crc2 = x_tmp3;
- *xmm_crc3 = _mm_castps_si128(ps_res);
-}
-
-static void fold_2(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
- const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
- 0x00000001, 0xc6e41596);
- __m128i x_tmp3, x_tmp2;
- __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3, ps_res31, ps_res20;
-
- x_tmp3 = *xmm_crc3;
- x_tmp2 = *xmm_crc2;
-
- *xmm_crc3 = *xmm_crc1;
- *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x01);
- *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x10);
- ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
- ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
- ps_res31 = _mm_xor_ps(ps_crc3, ps_crc1);
-
- *xmm_crc2 = *xmm_crc0;
- *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
- *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x10);
- ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
- ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
- ps_res20 = _mm_xor_ps(ps_crc0, ps_crc2);
-
- *xmm_crc0 = x_tmp2;
- *xmm_crc1 = x_tmp3;
- *xmm_crc2 = _mm_castps_si128(ps_res20);
- *xmm_crc3 = _mm_castps_si128(ps_res31);
-}
-
-static void fold_3(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
- const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
- 0x00000001, 0xc6e41596);
- __m128i x_tmp3;
- __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3, ps_res32, ps_res21, ps_res10;
-
- x_tmp3 = *xmm_crc3;
-
- *xmm_crc3 = *xmm_crc2;
- *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x01);
- *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x10);
- ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
- ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
- ps_res32 = _mm_xor_ps(ps_crc2, ps_crc3);
-
- *xmm_crc2 = *xmm_crc1;
- *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x01);
- *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x10);
- ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
- ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
- ps_res21 = _mm_xor_ps(ps_crc1, ps_crc2);
-
- *xmm_crc1 = *xmm_crc0;
- *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
- *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x10);
- ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
- ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
- ps_res10 = _mm_xor_ps(ps_crc0, ps_crc1);
-
- *xmm_crc0 = x_tmp3;
- *xmm_crc1 = _mm_castps_si128(ps_res10);
- *xmm_crc2 = _mm_castps_si128(ps_res21);
- *xmm_crc3 = _mm_castps_si128(ps_res32);
-}
-
-static void fold_4(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
- const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
- 0x00000001, 0xc6e41596);
- __m128i x_tmp0, x_tmp1, x_tmp2, x_tmp3;
- __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3;
- __m128 ps_t0, ps_t1, ps_t2, ps_t3;
- __m128 ps_res0, ps_res1, ps_res2, ps_res3;
-
- x_tmp0 = *xmm_crc0;
- x_tmp1 = *xmm_crc1;
- x_tmp2 = *xmm_crc2;
- x_tmp3 = *xmm_crc3;
-
- *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold4, 0x01);
- x_tmp0 = _mm_clmulepi64_si128(x_tmp0, xmm_fold4, 0x10);
- ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
- ps_t0 = _mm_castsi128_ps(x_tmp0);
- ps_res0 = _mm_xor_ps(ps_crc0, ps_t0);
-
- *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold4, 0x01);
- x_tmp1 = _mm_clmulepi64_si128(x_tmp1, xmm_fold4, 0x10);
- ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
- ps_t1 = _mm_castsi128_ps(x_tmp1);
- ps_res1 = _mm_xor_ps(ps_crc1, ps_t1);
-
- *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold4, 0x01);
- x_tmp2 = _mm_clmulepi64_si128(x_tmp2, xmm_fold4, 0x10);
- ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
- ps_t2 = _mm_castsi128_ps(x_tmp2);
- ps_res2 = _mm_xor_ps(ps_crc2, ps_t2);
-
- *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold4, 0x01);
- x_tmp3 = _mm_clmulepi64_si128(x_tmp3, xmm_fold4, 0x10);
- ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
- ps_t3 = _mm_castsi128_ps(x_tmp3);
- ps_res3 = _mm_xor_ps(ps_crc3, ps_t3);
-
- *xmm_crc0 = _mm_castps_si128(ps_res0);
- *xmm_crc1 = _mm_castps_si128(ps_res1);
- *xmm_crc2 = _mm_castps_si128(ps_res2);
- *xmm_crc3 = _mm_castps_si128(ps_res3);
-}
-
-static void fold_12(__m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2, __m128i *xmm_crc3) {
- const __m128i xmm_fold12 = _mm_set_epi64x(0x596C8D81, 0xF5E48C85);
- __m128i x_tmp0, x_tmp1, x_tmp2, x_tmp3;
- __m128 ps_crc0, ps_crc1, ps_crc2, ps_crc3;
- __m128 ps_t0, ps_t1, ps_t2, ps_t3;
- __m128 ps_res0, ps_res1, ps_res2, ps_res3;
-
- x_tmp0 = *xmm_crc0;
- x_tmp1 = *xmm_crc1;
- x_tmp2 = *xmm_crc2;
- x_tmp3 = *xmm_crc3;
-
- *xmm_crc0 = _mm_clmulepi64_si128(*xmm_crc0, xmm_fold12, 0x01);
- x_tmp0 = _mm_clmulepi64_si128(x_tmp0, xmm_fold12, 0x10);
- ps_crc0 = _mm_castsi128_ps(*xmm_crc0);
- ps_t0 = _mm_castsi128_ps(x_tmp0);
- ps_res0 = _mm_xor_ps(ps_crc0, ps_t0);
-
- *xmm_crc1 = _mm_clmulepi64_si128(*xmm_crc1, xmm_fold12, 0x01);
- x_tmp1 = _mm_clmulepi64_si128(x_tmp1, xmm_fold12, 0x10);
- ps_crc1 = _mm_castsi128_ps(*xmm_crc1);
- ps_t1 = _mm_castsi128_ps(x_tmp1);
- ps_res1 = _mm_xor_ps(ps_crc1, ps_t1);
-
- *xmm_crc2 = _mm_clmulepi64_si128(*xmm_crc2, xmm_fold12, 0x01);
- x_tmp2 = _mm_clmulepi64_si128(x_tmp2, xmm_fold12, 0x10);
- ps_crc2 = _mm_castsi128_ps(*xmm_crc2);
- ps_t2 = _mm_castsi128_ps(x_tmp2);
- ps_res2 = _mm_xor_ps(ps_crc2, ps_t2);
-
- *xmm_crc3 = _mm_clmulepi64_si128(*xmm_crc3, xmm_fold12, 0x01);
- x_tmp3 = _mm_clmulepi64_si128(x_tmp3, xmm_fold12, 0x10);
- ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
- ps_t3 = _mm_castsi128_ps(x_tmp3);
- ps_res3 = _mm_xor_ps(ps_crc3, ps_t3);
-
- *xmm_crc0 = _mm_castps_si128(ps_res0);
- *xmm_crc1 = _mm_castps_si128(ps_res1);
- *xmm_crc2 = _mm_castps_si128(ps_res2);
- *xmm_crc3 = _mm_castps_si128(ps_res3);
-}
-
-static const unsigned ALIGNED_(32) pshufb_shf_table[60] = {
- 0x84838281, 0x88878685, 0x8c8b8a89, 0x008f8e8d, /* shl 15 (16 - 1)/shr1 */
- 0x85848382, 0x89888786, 0x8d8c8b8a, 0x01008f8e, /* shl 14 (16 - 3)/shr2 */
- 0x86858483, 0x8a898887, 0x8e8d8c8b, 0x0201008f, /* shl 13 (16 - 4)/shr3 */
- 0x87868584, 0x8b8a8988, 0x8f8e8d8c, 0x03020100, /* shl 12 (16 - 4)/shr4 */
- 0x88878685, 0x8c8b8a89, 0x008f8e8d, 0x04030201, /* shl 11 (16 - 5)/shr5 */
- 0x89888786, 0x8d8c8b8a, 0x01008f8e, 0x05040302, /* shl 10 (16 - 6)/shr6 */
- 0x8a898887, 0x8e8d8c8b, 0x0201008f, 0x06050403, /* shl 9 (16 - 7)/shr7 */
- 0x8b8a8988, 0x8f8e8d8c, 0x03020100, 0x07060504, /* shl 8 (16 - 8)/shr8 */
- 0x8c8b8a89, 0x008f8e8d, 0x04030201, 0x08070605, /* shl 7 (16 - 9)/shr9 */
- 0x8d8c8b8a, 0x01008f8e, 0x05040302, 0x09080706, /* shl 6 (16 -10)/shr10*/
- 0x8e8d8c8b, 0x0201008f, 0x06050403, 0x0a090807, /* shl 5 (16 -11)/shr11*/
- 0x8f8e8d8c, 0x03020100, 0x07060504, 0x0b0a0908, /* shl 4 (16 -12)/shr12*/
- 0x008f8e8d, 0x04030201, 0x08070605, 0x0c0b0a09, /* shl 3 (16 -13)/shr13*/
- 0x01008f8e, 0x05040302, 0x09080706, 0x0d0c0b0a, /* shl 2 (16 -14)/shr14*/
- 0x0201008f, 0x06050403, 0x0a090807, 0x0e0d0c0b /* shl 1 (16 -15)/shr15*/
-};
-
-static void partial_fold(const size_t len, __m128i *xmm_crc0, __m128i *xmm_crc1, __m128i *xmm_crc2,
- __m128i *xmm_crc3, __m128i *xmm_crc_part) {
- const __m128i xmm_fold4 = _mm_set_epi32( 0x00000001, 0x54442bd4,
- 0x00000001, 0xc6e41596);
- const __m128i xmm_mask3 = _mm_set1_epi32((int32_t)0x80808080);
-
- __m128i xmm_shl, xmm_shr, xmm_tmp1, xmm_tmp2, xmm_tmp3;
- __m128i xmm_a0_0, xmm_a0_1;
- __m128 ps_crc3, psa0_0, psa0_1, ps_res;
-
- xmm_shl = _mm_load_si128((__m128i *)(pshufb_shf_table + (4 * (len - 1))));
- xmm_shr = xmm_shl;
- xmm_shr = _mm_xor_si128(xmm_shr, xmm_mask3);
-
- xmm_a0_0 = _mm_shuffle_epi8(*xmm_crc0, xmm_shl);
-
- *xmm_crc0 = _mm_shuffle_epi8(*xmm_crc0, xmm_shr);
- xmm_tmp1 = _mm_shuffle_epi8(*xmm_crc1, xmm_shl);
- *xmm_crc0 = _mm_or_si128(*xmm_crc0, xmm_tmp1);
-
- *xmm_crc1 = _mm_shuffle_epi8(*xmm_crc1, xmm_shr);
- xmm_tmp2 = _mm_shuffle_epi8(*xmm_crc2, xmm_shl);
- *xmm_crc1 = _mm_or_si128(*xmm_crc1, xmm_tmp2);
-
- *xmm_crc2 = _mm_shuffle_epi8(*xmm_crc2, xmm_shr);
- xmm_tmp3 = _mm_shuffle_epi8(*xmm_crc3, xmm_shl);
- *xmm_crc2 = _mm_or_si128(*xmm_crc2, xmm_tmp3);
-
- *xmm_crc3 = _mm_shuffle_epi8(*xmm_crc3, xmm_shr);
- *xmm_crc_part = _mm_shuffle_epi8(*xmm_crc_part, xmm_shl);
- *xmm_crc3 = _mm_or_si128(*xmm_crc3, *xmm_crc_part);
-
- xmm_a0_1 = _mm_clmulepi64_si128(xmm_a0_0, xmm_fold4, 0x10);
- xmm_a0_0 = _mm_clmulepi64_si128(xmm_a0_0, xmm_fold4, 0x01);
-
- ps_crc3 = _mm_castsi128_ps(*xmm_crc3);
- psa0_0 = _mm_castsi128_ps(xmm_a0_0);
- psa0_1 = _mm_castsi128_ps(xmm_a0_1);
-
- ps_res = _mm_xor_ps(ps_crc3, psa0_0);
- ps_res = _mm_xor_ps(ps_res, psa0_1);
-
- *xmm_crc3 = _mm_castps_si128(ps_res);
-}
-
-static inline void crc32_fold_load(__m128i *fold, __m128i *fold0, __m128i *fold1, __m128i *fold2, __m128i *fold3) {
- *fold0 = _mm_load_si128(fold + 0);
- *fold1 = _mm_load_si128(fold + 1);
- *fold2 = _mm_load_si128(fold + 2);
- *fold3 = _mm_load_si128(fold + 3);
-}
-
-static inline void crc32_fold_save(__m128i *fold, const __m128i *fold0, const __m128i *fold1,
- const __m128i *fold2, const __m128i *fold3) {
- _mm_storeu_si128(fold + 0, *fold0);
- _mm_storeu_si128(fold + 1, *fold1);
- _mm_storeu_si128(fold + 2, *fold2);
- _mm_storeu_si128(fold + 3, *fold3);
-}
-
-Z_INTERNAL uint32_t CRC32_FOLD_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;
-}
-
-#define ONCE(op) if (first) { first = 0; op; }
-#define XOR_INITIAL128(where) ONCE(where = _mm_xor_si128(where, xmm_initial))
-#ifdef X86_VPCLMULQDQ
-# define XOR_INITIAL512(where) ONCE(where = _mm512_xor_si512(where, zmm_initial))
-#endif
-
-#ifdef X86_VPCLMULQDQ
-# include "crc32_fold_vpclmulqdq_tpl.h"
-#endif
-#include "crc32_fold_pclmulqdq_tpl.h"
-#define COPY
-#ifdef X86_VPCLMULQDQ
-# include "crc32_fold_vpclmulqdq_tpl.h"
-#endif
-#include "crc32_fold_pclmulqdq_tpl.h"
-
-static const unsigned ALIGNED_(16) crc_k[] = {
- 0xccaa009e, 0x00000000, /* rk1 */
- 0x751997d0, 0x00000001, /* rk2 */
- 0xccaa009e, 0x00000000, /* rk5 */
- 0x63cd6124, 0x00000001, /* rk6 */
- 0xf7011640, 0x00000001, /* rk7 */
- 0xdb710640, 0x00000001 /* rk8 */
-};
-
-static const unsigned ALIGNED_(16) crc_mask[4] = {
- 0xFFFFFFFF, 0xFFFFFFFF, 0x00000000, 0x00000000
-};
-
-static const unsigned ALIGNED_(16) crc_mask2[4] = {
- 0x00000000, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF
-};
-
-Z_INTERNAL uint32_t CRC32_FOLD_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;
- __m128i x_tmp0, x_tmp1, x_tmp2, crc_fold;
-
- crc32_fold_load((__m128i *)crc->fold, &xmm_crc0, &xmm_crc1, &xmm_crc2, &xmm_crc3);
-
- /*
- * k1
- */
- crc_fold = _mm_load_si128((__m128i *)crc_k);
-
- x_tmp0 = _mm_clmulepi64_si128(xmm_crc0, crc_fold, 0x10);
- xmm_crc0 = _mm_clmulepi64_si128(xmm_crc0, crc_fold, 0x01);
- xmm_crc1 = _mm_xor_si128(xmm_crc1, x_tmp0);
- xmm_crc1 = _mm_xor_si128(xmm_crc1, xmm_crc0);
-
- x_tmp1 = _mm_clmulepi64_si128(xmm_crc1, crc_fold, 0x10);
- xmm_crc1 = _mm_clmulepi64_si128(xmm_crc1, crc_fold, 0x01);
- xmm_crc2 = _mm_xor_si128(xmm_crc2, x_tmp1);
- xmm_crc2 = _mm_xor_si128(xmm_crc2, xmm_crc1);
-
- x_tmp2 = _mm_clmulepi64_si128(xmm_crc2, crc_fold, 0x10);
- xmm_crc2 = _mm_clmulepi64_si128(xmm_crc2, crc_fold, 0x01);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, x_tmp2);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc2);
-
- /*
- * k5
- */
- crc_fold = _mm_load_si128((__m128i *)(crc_k + 4));
-
- xmm_crc0 = xmm_crc3;
- xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0);
- xmm_crc0 = _mm_srli_si128(xmm_crc0, 8);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc0);
-
- xmm_crc0 = xmm_crc3;
- xmm_crc3 = _mm_slli_si128(xmm_crc3, 4);
- xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0x10);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc0);
- xmm_crc3 = _mm_and_si128(xmm_crc3, xmm_mask2);
-
- /*
- * k7
- */
- xmm_crc1 = xmm_crc3;
- xmm_crc2 = xmm_crc3;
- crc_fold = _mm_load_si128((__m128i *)(crc_k + 8));
-
- xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc2);
- xmm_crc3 = _mm_and_si128(xmm_crc3, xmm_mask);
-
- xmm_crc2 = xmm_crc3;
- xmm_crc3 = _mm_clmulepi64_si128(xmm_crc3, crc_fold, 0x10);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc2);
- xmm_crc3 = _mm_xor_si128(xmm_crc3, xmm_crc1);
-
- crc->value = ~((uint32_t)_mm_extract_epi32(xmm_crc3, 2));
-
- return crc->value;
-}
-
-static inline uint32_t crc32_small(uint32_t crc, const uint8_t *buf, size_t len) {
- uint32_t c = (~crc) & 0xffffffff;
-
- while (len) {
- len--;
- CRC_DO1;
- }
-
- return c ^ 0xffffffff;
-}
-
-Z_INTERNAL uint32_t CRC32(uint32_t crc32, const uint8_t *buf, size_t len) {
- /* For lens smaller than ~12, crc32_small method is faster.
- * But there are also minimum requirements for the pclmul functions due to alignment */
- if (len < 16)
- return crc32_small(crc32, buf, len);
-
- crc32_fold ALIGNED_(16) crc_state;
- CRC32_FOLD_RESET(&crc_state);
- CRC32_FOLD(&crc_state, buf, len, crc32);
- return CRC32_FOLD_FINAL(&crc_state);
-}
projects / thirdparty / zlib-ng.git / commitdiff
