Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 274 insertions, 0 deletions

diff --git a/src/common/crc32c_aarch64.c b/src/common/crc32c_aarch64.c
new file mode 100644
index 000000000..99e588399
--- /dev/null
+++ b/src/common/crc32c_aarch64.c
@@ -0,0 +1,274 @@
+#include "acconfig.h"
+#include "include/int_types.h"
+#include "common/crc32c_aarch64.h"
+#include "arch/arm.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) {
+#ifdef HAVE_ARMV8_CRYPTO
+	        if (ceph_arch_aarch64_pmull) {
+#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","v0","v1");
+
+		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))
+				:"v0","v1","v2","v3");
+			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
+	        if (ceph_arch_aarch64_pmull) {
+#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","v1");
+
+		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)
+				:"v1","v3");
+		}
+#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;
+}