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update zip-3.0-crc-builtin.patch.

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hanzhelii 2021-05-17 19:12:53 +08:00 committed by Gitee
parent d10fa156ed
commit f72bf32f61
1 changed files with 20 additions and 20 deletions
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zip-3.0-crc-builtin.patch
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@ -1,7 +1,8 @@
From 6210c2007a430882d234d846d133d5f3799434aa Mon Sep 17 00:00:00 2001
From: Euler Hanzh <18221254@bjtu.edu.cn>
Date: Mon, 17 May 2021 17:32:51 +0800
Subject: [PATCH 2/2] 2
Subject: [PATCH] this patch is created for performance optimization in crc calculation only suitable for openeuler of aarch64 architecture.
The speed of zip software when running can be accelerate by nearly 20% than before.
---
zip30/crc32.c | 27 +++++++++++++++++++++++++++
@ -20,27 +21,27 @@ index 6b2403b..9e26af7 100644
+#ifdef ARCH_AARCH64
+u_int32_t crc32(u_int32_t crc,const u_int8_t *p, unsigned int len)
+{
+int64_t length = len;
+ int64_t length = len;
+
+while ((length -= sizeof(u_int64_t)) >=0) {
+ while ((length -= sizeof(u_int64_t)) >=0) {
+ __builtin_aarch64_crc32cx(crc, *((u_int64_t *)p));
+ p += sizeof(u_int64_t);
+}
+ }
+if (length & sizeof(u_int32_t)) {
+ if (length & sizeof(u_int32_t)) {
+ __builtin_aarch64_crc32cw(crc, *((u_int32_t *)p));
+ p += sizeof(u_int32_t);
+}
+ }
+
+if (length & sizeof(u_int16_t)) {
+ if (length & sizeof(u_int16_t)) {
+ __builtin_aarch64_crc32ch(crc, *((u_int16_t *)p));
+ p += sizeof(u_int16_t);
+}
+ }
+
+if (length & sizeof(u_int8_t))
+ if (length & sizeof(u_int8_t))
+ __builtin_aarch64_crc32cb(crc, *p);
+
+return crc;
+ return crc;
+}
+#else
/* ========================================================================= */
@ -51,7 +52,6 @@ index 6b2403b..9e26af7 100644
return REV_BE(c) ^ 0xffffffffL; /* (instead of ~c for 64-bit machines) */
}
+#endif /* !ARCH_AARCH64*/
+
#endif /* !ASM_CRC */
#endif /* !CRC_TABLE_ONLY */
#endif /* !USE_ZLIB */