#include "include/int_types.h"
#include "common/crc32c_aarch64.h"
+#ifndef HAVE_ARMV8_CRC_CRYPTO_INTRINSICS
/* Request crc extension capabilities from the assembler */
asm(".arch_extension crc");
+#ifdef HAVE_ARMV8_CRYPTO
+/* Request crypto extension capabilities from the assembler */
+asm(".arch_extension crypto");
+#endif
+
#define CRC32CX(crc, value) __asm__("crc32cx %w[c], %w[c], %x[v]":[c]"+r"(crc):[v]"r"(value))
#define CRC32CW(crc, value) __asm__("crc32cw %w[c], %w[c], %w[v]":[c]"+r"(crc):[v]"r"(value))
#define CRC32CH(crc, value) __asm__("crc32ch %w[c], %w[c], %w[v]":[c]"+r"(crc):[v]"r"(value))
#define CRC32CB(crc, value) __asm__("crc32cb %w[c], %w[c], %w[v]":[c]"+r"(crc):[v]"r"(value))
+#define CRC32C3X8(ITR) \
+ __asm__("crc32cx %w[c1], %w[c1], %x[v]":[c1]"+r"(crc1):[v]"r"(*((const uint64_t *)buffer + 42*1 + (ITR))));\
+ __asm__("crc32cx %w[c2], %w[c2], %x[v]":[c2]"+r"(crc2):[v]"r"(*((const uint64_t *)buffer + 42*2 + (ITR))));\
+ __asm__("crc32cx %w[c0], %w[c0], %x[v]":[c0]"+r"(crc0):[v]"r"(*((const uint64_t *)buffer + 42*0 + (ITR))));
+
+#define CRC32C3X8_ZERO \
+ __asm__("crc32cx %w[c0], %w[c0], xzr":[c0]"+r"(crc0));
+
+#else /* HAVE_ARMV8_CRC_CRYPTO_INTRINSICS */
+
+#include <arm_acle.h>
+#include <arm_neon.h>
+
+#define CRC32CX(crc, value) (crc) = __crc32cd((crc), (value))
+#define CRC32CW(crc, value) (crc) = __crc32cw((crc), (value))
+#define CRC32CH(crc, value) (crc) = __crc32ch((crc), (value))
+#define CRC32CB(crc, value) (crc) = __crc32cb((crc), (value))
+
+#define CRC32C3X8(ITR) \
+ crc1 = __crc32cd(crc1, *((const uint64_t *)buffer + 42*1 + (ITR)));\
+ crc2 = __crc32cd(crc2, *((const uint64_t *)buffer + 42*2 + (ITR)));\
+ crc0 = __crc32cd(crc0, *((const uint64_t *)buffer + 42*0 + (ITR)));
+
+#define CRC32C3X8_ZERO \
+ crc0 = __crc32cd(crc0, (const uint64_t)0);
+
+#endif /* HAVE_ARMV8_CRC_CRYPTO_INTRINSICS */
+
+#define CRC32C7X3X8(ITR) do {\
+ CRC32C3X8((ITR)*7+0) \
+ CRC32C3X8((ITR)*7+1) \
+ CRC32C3X8((ITR)*7+2) \
+ CRC32C3X8((ITR)*7+3) \
+ CRC32C3X8((ITR)*7+4) \
+ CRC32C3X8((ITR)*7+5) \
+ CRC32C3X8((ITR)*7+6) \
+ } while(0)
+
+#define CRC32C7X3X8_ZERO do {\
+ CRC32C3X8_ZERO \
+ CRC32C3X8_ZERO \
+ CRC32C3X8_ZERO \
+ CRC32C3X8_ZERO \
+ CRC32C3X8_ZERO \
+ CRC32C3X8_ZERO \
+ CRC32C3X8_ZERO \
+ } while(0)
+
+#define PREF4X64L1(PREF_OFFSET, ITR) \
+ __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 0)*64));\
+ __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 1)*64));\
+ __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 2)*64));\
+ __asm__("PRFM PLDL1KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 3)*64));
+
+#define PREF1KL1(PREF_OFFSET) \
+ PREF4X64L1((PREF_OFFSET), 0) \
+ PREF4X64L1((PREF_OFFSET), 4) \
+ PREF4X64L1((PREF_OFFSET), 8) \
+ PREF4X64L1((PREF_OFFSET), 12)
+
+#define PREF4X64L2(PREF_OFFSET, ITR) \
+ __asm__("PRFM PLDL2KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 0)*64));\
+ __asm__("PRFM PLDL2KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 1)*64));\
+ __asm__("PRFM PLDL2KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 2)*64));\
+ __asm__("PRFM PLDL2KEEP, [%x[v],%[c]]"::[v]"r"(buffer), [c]"I"((PREF_OFFSET) + ((ITR) + 3)*64));
+
+#define PREF1KL2(PREF_OFFSET) \
+ PREF4X64L2((PREF_OFFSET), 0) \
+ PREF4X64L2((PREF_OFFSET), 4) \
+ PREF4X64L2((PREF_OFFSET), 8) \
+ PREF4X64L2((PREF_OFFSET), 12)
+
+
uint32_t ceph_crc32c_aarch64(uint32_t crc, unsigned char const *buffer, unsigned len)
{
int64_t length = len;
+ uint32_t crc0, crc1, crc2;
- if (!buffer) {
+ if (buffer) {
+#ifdef HAVE_ARMV8_CRYPTO
+#ifdef HAVE_ARMV8_CRC_CRYPTO_INTRINSICS
+ /* Calculate reflected crc with PMULL Instruction */
+ const poly64_t k1 = 0xe417f38a, k2 = 0x8f158014;
+ uint64_t t0, t1;
- while ((length -= sizeof(uint64_t)) >= 0)
- CRC32CX(crc, 0);
+ /* crc done "by 3" for fixed input block size of 1024 bytes */
+ while ((length -= 1024) >= 0) {
+ /* Prefetch data for following block to avoid cache miss */
+ PREF1KL2(1024*3);
+ /* Do first 8 bytes here for better pipelining */
+ crc0 = __crc32cd(crc, *(const uint64_t *)buffer);
+ crc1 = 0;
+ crc2 = 0;
+ buffer += sizeof(uint64_t);
- /* The following is more efficient than the straight loop */
- if (length & sizeof(uint32_t))
- CRC32CW(crc, 0);
+ /* Process block inline
+ Process crc0 last to avoid dependency with above */
+ CRC32C7X3X8(0);
+ CRC32C7X3X8(1);
+ CRC32C7X3X8(2);
+ CRC32C7X3X8(3);
+ CRC32C7X3X8(4);
+ CRC32C7X3X8(5);
- if (length & sizeof(uint16_t))
- CRC32CH(crc, 0);
+ buffer += 42*3*sizeof(uint64_t);
+ /* Prefetch data for following block to avoid cache miss */
+ PREF1KL1(1024);
- if (length & sizeof(uint8_t))
- CRC32CB(crc, 0);
- } else {
+ /* Merge crc0 and crc1 into crc2
+ crc1 multiply by K2
+ crc0 multiply by K1 */
+
+ t1 = (uint64_t)vmull_p64(crc1, k2);
+ t0 = (uint64_t)vmull_p64(crc0, k1);
+ crc = __crc32cd(crc2, *(const uint64_t *)buffer);
+ crc1 = __crc32cd(0, t1);
+ crc ^= crc1;
+ crc0 = __crc32cd(0, t0);
+ crc ^= crc0;
+
+ buffer += sizeof(uint64_t);
+ }
+#else /* !HAVE_ARMV8_CRC_CRYPTO_INTRINSICS */
+ __asm__("mov x16, #0xf38a \n\t"
+ "movk x16, #0xe417, lsl 16 \n\t"
+ "mov v1.2d[0], x16 \n\t"
+ "mov x16, #0x8014 \n\t"
+ "movk x16, #0x8f15, lsl 16 \n\t"
+ "mov v0.2d[0], x16 \n\t"
+ :::"x16");
+
+ while ((length -= 1024) >= 0) {
+ PREF1KL2(1024*3);
+ __asm__("crc32cx %w[c0], %w[c], %x[v]\n\t"
+ :[c0]"=r"(crc0):[c]"r"(crc), [v]"r"(*(const uint64_t *)buffer):);
+ crc1 = 0;
+ crc2 = 0;
+ buffer += sizeof(uint64_t);
+
+ CRC32C7X3X8(0);
+ CRC32C7X3X8(1);
+ CRC32C7X3X8(2);
+ CRC32C7X3X8(3);
+ CRC32C7X3X8(4);
+ CRC32C7X3X8(5);
+
+ buffer += 42*3*sizeof(uint64_t);
+ PREF1KL1(1024);
+ __asm__("mov v2.2d[0], %x[c1] \n\t"
+ "pmull v2.1q, v2.1d, v0.1d \n\t"
+ "mov v3.2d[0], %x[c0] \n\t"
+ "pmull v3.1q, v3.1d, v1.1d \n\t"
+ "crc32cx %w[c], %w[c2], %x[v] \n\t"
+ "mov %x[c1], v2.2d[0] \n\t"
+ "crc32cx %w[c1], wzr, %x[c1] \n\t"
+ "eor %w[c], %w[c], %w[c1] \n\t"
+ "mov %x[c0], v3.2d[0] \n\t"
+ "crc32cx %w[c0], wzr, %x[c0] \n\t"
+ "eor %w[c], %w[c], %w[c0] \n\t"
+ :[c1]"+r"(crc1), [c0]"+r"(crc0), [c2]"+r"(crc2), [c]"+r"(crc)
+ :[v]"r"(*((const uint64_t *)buffer)));
+ buffer += sizeof(uint64_t);
+ }
+#endif /* HAVE_ARMV8_CRC_CRYPTO_INTRINSICS */
+
+ if(!(length += 1024))
+ return crc;
+
+#endif /* HAVE_ARMV8_CRYPTO */
while ((length -= sizeof(uint64_t)) >= 0) {
CRC32CX(crc, *(uint64_t *)buffer);
buffer += sizeof(uint64_t);
}
if (length & sizeof(uint8_t))
CRC32CB(crc, *buffer);
+ } else {
+#ifdef HAVE_ARMV8_CRYPTO
+#ifdef HAVE_ARMV8_CRC_CRYPTO_INTRINSICS
+ const poly64_t k1 = 0xe417f38a;
+ uint64_t t0;
+
+ while ((length -= 1024) >= 0) {
+ crc0 = __crc32cd(crc, 0);
+
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+
+ /* Merge crc0 into crc: crc0 multiply by K1 */
+
+ t0 = (uint64_t)vmull_p64(crc0, k1);
+ crc = __crc32cd(0, t0);
+ }
+#else /* !HAVE_ARMV8_CRC_CRYPTO_INTRINSICS */
+ __asm__("mov x16, #0xf38a \n\t"
+ "movk x16, #0xe417, lsl 16 \n\t"
+ "mov v1.2d[0], x16 \n\t"
+ :::"x16");
+
+ while ((length -= 1024) >= 0) {
+ __asm__("crc32cx %w[c0], %w[c], xzr\n\t"
+ :[c0]"=r"(crc0):[c]"r"(crc));
+
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+ CRC32C7X3X8_ZERO;
+
+ __asm__("mov v3.2d[0], %x[c0] \n\t"
+ "pmull v3.1q, v3.1d, v1.1d \n\t"
+ "mov %x[c0], v3.2d[0] \n\t"
+ "crc32cx %w[c], wzr, %x[c0] \n\t"
+ :[c]"=r"(crc)
+ :[c0]"r"(crc0));
+ }
+#endif /* HAVE_ARMV8_CRC_CRYPTO_INTRINSICS */
+
+ if(!(length += 1024))
+ return crc;
+
+#endif /* HAVE_ARMV8_CRYPTO */
+ while ((length -= sizeof(uint64_t)) >= 0)
+ CRC32CX(crc, 0);
+
+ /* The following is more efficient than the straight loop */
+ if (length & sizeof(uint32_t))
+ CRC32CW(crc, 0);
+
+ if (length & sizeof(uint16_t))
+ CRC32CH(crc, 0);
+
+ if (length & sizeof(uint8_t))
+ CRC32CB(crc, 0);
}
return crc;
}
projects / ceph.git / commitdiff