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https://issues.apache.org/jira/browse/HADOOP-19724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18047599#comment-18047599
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ASF GitHub Bot commented on HADOOP-19724:
-----------------------------------------
PeterPtroc commented on code in PR #8031:
URL: https://github.com/apache/hadoop/pull/8031#discussion_r2647952233
##########
hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32_riscv.c:
##########
@@ -16,24 +16,200 @@
* limitations under the License.
*/
+#include <assert.h>
+#include <stddef.h> // for size_t
+#include <stdio.h>
+#include <string.h>
+
+#include "bulk_crc32.h"
+#include "gcc_optimizations.h"
+
+/**
+ * Hardware-accelerated CRC32 calculation using RISC-V Zbc extension.
+ * Uses carry-less multiply instructions (clmul/clmulh) for CRC32 (zlib
+ * polynomial).
+ */
+
+typedef void (*crc_pipelined_func_t)(uint32_t *, uint32_t *, uint32_t *,
+ const uint8_t *, size_t, int);
+extern crc_pipelined_func_t pipelined_crc32_zlib_func;
+
+#if defined(__riscv) && (__riscv_xlen == 64)
+
+#define RV_CRC32_CONST_R3 0x01751997d0ULL
Review Comment:
done
> [RISC-V] Add rv bulk CRC32 (non-CRC32C) optimized path
> -------------------------------------------------------
>
> Key: HADOOP-19724
> URL: https://issues.apache.org/jira/browse/HADOOP-19724
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: hadoop-common
> Affects Versions: 3.5.0
> Reporter: Ptroc
> Priority: Major
> Labels: native, pull-request-available, risc-v
>
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