From a23b8c8c0aa09f1908606c70f5a18eb171e062b1 Mon Sep 17 00:00:00 2001
From: Richael Zhuang <richael.zhuang@arm.com>
Date: Thu, 17 Jan 2019 10:04:31 +0800
Subject: [PATCH] Update spdk crc32.c with ARM CRC32 intrinsics

Implement spdk_crc32_update() with ARM CRC32 intrinsics.

Change-Id: I6a64122f5dd3b804408cfae61a205e78fd8c4547
Signed-off-by: Richael Zhuang <richael.zhuang@arm.com>
Reviewed-on: https://review.gerrithub.io/c/440828
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
---
 lib/util/crc32.c | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/lib/util/crc32.c b/lib/util/crc32.c
index dfef9c54a..6fbb004ce 100644
--- a/lib/util/crc32.c
+++ b/lib/util/crc32.c
@@ -52,6 +52,32 @@ spdk_crc32_table_init(struct spdk_crc32_table *table, uint32_t polynomial_reflec
 	}
 }
 
+#ifdef SPDK_HAVE_ARM_CRC
+
+uint32_t
+spdk_crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
+{
+	size_t count;
+	const uint64_t *dword_buf;
+
+	count = len & 7;
+	while (count--) {
+		crc = __crc32b(crc, *(const uint8_t *)buf);
+		buf++;
+	}
+	dword_buf = (const uint64_t *)buf;
+
+	count = len / 8;
+	while (count--) {
+		crc = __crc32d(crc, *dword_buf);
+		dword_buf++;
+	}
+
+	return crc;
+}
+
+#else
+
 uint32_t
 spdk_crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t len, uint32_t crc)
 {
@@ -64,3 +90,5 @@ spdk_crc32_update(const struct spdk_crc32_table *table, const void *buf, size_t
 
 	return crc;
 }
+
+#endif