X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=src%2Fceph%2Fsrc%2Fcommon%2Fcrc32c_aarch64.c;fp=src%2Fceph%2Fsrc%2Fcommon%2Fcrc32c_aarch64.c;h=e4fbf23a7602a73846a9dc13c8043a42e398bd98;hb=812ff6ca9fcd3e629e49d4328905f33eee8ca3f5;hp=0000000000000000000000000000000000000000;hpb=15280273faafb77777eab341909a3f495cf248d9;p=stor4nfv.git diff --git a/src/ceph/src/common/crc32c_aarch64.c b/src/ceph/src/common/crc32c_aarch64.c new file mode 100644 index 0000000..e4fbf23 --- /dev/null +++ b/src/ceph/src/common/crc32c_aarch64.c @@ -0,0 +1,269 @@ +#include "acconfig.h" +#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 +#include + +#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) { +#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; + + /* 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); + + /* Process block inline + Process crc0 last to avoid dependency with above */ + CRC32C7X3X8(0); + CRC32C7X3X8(1); + CRC32C7X3X8(2); + CRC32C7X3X8(3); + CRC32C7X3X8(4); + CRC32C7X3X8(5); + + buffer += 42*3*sizeof(uint64_t); + /* Prefetch data for following block to avoid cache miss */ + PREF1KL1(1024); + + /* 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); + } + + /* The following is more efficient than the straight loop */ + if (length & sizeof(uint32_t)) { + CRC32CW(crc, *(uint32_t *)buffer); + buffer += sizeof(uint32_t); + } + if (length & sizeof(uint16_t)) { + CRC32CH(crc, *(uint16_t *)buffer); + buffer += sizeof(uint16_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; +}