1 files changed, 103 insertions, 0 deletions
diff --git a/neozip/arch/arm/crc32_armv8_p.h b/neozip/arch/arm/crc32_armv8_p.h
new file mode 100644
index 0000000000..e72c4c0ad1
--- /dev/null
+++ b/neozip/arch/arm/crc32_armv8_p.h
@@ -0,0 +1,103 @@
+/* crc32_armv8_p.h -- Private shared inline ARMv8 CRC32 functions
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+#ifndef CRC32_ARMV8_P_H
+#define CRC32_ARMV8_P_H
+
+#include "zbuild.h"
+#include "acle_intrins.h"
+
+Z_FORCEINLINE static Z_TARGET_CRC uint32_t crc32_armv8_align(uint32_t crc, uint8_t **dst, const uint8_t **buf,
+                                                             size_t *len, uintptr_t align_diff, const int COPY) {
+    if (*len && (align_diff & 1)) {
+        uint8_t val = **buf;
+        if (COPY) {
+            **dst = val;
+            *dst += 1;
+        }
+        crc = __crc32b(crc, val);
+        *buf += 1;
+        *len -= 1;
+    }
+
+    if (*len >= 2 && (align_diff & 2)) {
+        uint16_t val = *((uint16_t*)*buf);
+        if (COPY) {
+            memcpy(*dst, &val, 2);
+            *dst += 2;
+        }
+        crc = __crc32h(crc, val);
+        *buf += 2;
+        *len -= 2;
+    }
+
+    if (*len >= 4 && (align_diff & 4)) {
+        uint32_t val = *((uint32_t*)*buf);
+        if (COPY) {
+            memcpy(*dst, &val, 4);
+            *dst += 4;
+        }
+        crc = __crc32w(crc, val);
+        *buf += 4;
+        *len -= 4;
+    }
+
+    if (*len >= 8 && (align_diff & 8)) {
+        uint64_t val = *((uint64_t*)*buf);
+        if (COPY) {
+            memcpy(*dst, &val, 8);
+            *dst += 8;
+        }
+        crc = __crc32d(crc, val);
+        *buf += 8;
+        *len -= 8;
+    }
+
+    return crc;
+}
+
+Z_FORCEINLINE static Z_TARGET_CRC uint32_t crc32_armv8_tail(uint32_t crc, uint8_t *dst, const uint8_t *buf,
+                                                            size_t len, const int COPY) {
+    while (len >= 8) {
+        uint64_t val = *((uint64_t*)buf);
+        if (COPY) {
+            memcpy(dst, &val, 8);
+            dst += 8;
+        }
+        crc = __crc32d(crc, val);
+        buf += 8;
+        len -= 8;
+    }
+
+    if (len & 4) {
+        uint32_t val = *((uint32_t*)buf);
+        if (COPY) {
+            memcpy(dst, &val, 4);
+            dst += 4;
+        }
+        crc = __crc32w(crc, val);
+        buf += 4;
+    }
+
+    if (len & 2) {
+        uint16_t val = *((uint16_t*)buf);
+        if (COPY) {
+            memcpy(dst, &val, 2);
+            dst += 2;
+        }
+        crc = __crc32h(crc, val);
+        buf += 2;
+    }
+
+    if (len & 1) {
+        uint8_t val = *buf;
+        if (COPY)
+            *dst = val;
+        crc = __crc32b(crc, val);
+    }
+
+    return ~crc;
+}
+
+#endif /* CRC32_ARMV8_P_H */