vendor: OpenCV 5.0.0 snapshot at 40738fb16ceddb5fb3fea747585f7ce6abb0605b

2026-08-22 00:10:33 +08:00
commit f7f077da11
6933 changed files with 2335208 additions and 0 deletions
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+/* crc32_acle.c -- compute the CRC-32 of a data stream
+ * Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
+ * Copyright (C) 2016 Yang Zhang
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ *
+*/
+
+#ifdef ARM_ACLE
+#include "acle_intrins.h"
+#include "zbuild.h"
+
+Z_INTERNAL Z_TARGET_CRC uint32_t crc32_acle(uint32_t crc, const uint8_t *buf, size_t len) {
+    Z_REGISTER uint32_t c;
+    Z_REGISTER const uint16_t *buf2;
+    Z_REGISTER const uint32_t *buf4;
+    Z_REGISTER const uint64_t *buf8;
+
+    c = ~crc;
+
+    if (UNLIKELY(len == 1)) {
+        c = __crc32b(c, *buf);
+        c = ~c;
+        return c;
+    }
+
+    if ((ptrdiff_t)buf & (sizeof(uint64_t) - 1)) {
+        if (len && ((ptrdiff_t)buf & 1)) {
+            c = __crc32b(c, *buf++);
+            len--;
+        }
+
+        if ((len >= sizeof(uint16_t)) && ((ptrdiff_t)buf & sizeof(uint16_t))) {
+            buf2 = (const uint16_t *) buf;
+            c = __crc32h(c, *buf2++);
+            len -= sizeof(uint16_t);
+            buf4 = (const uint32_t *) buf2;
+        } else {
+            buf4 = (const uint32_t *) buf;
+        }
+
+        if ((len >= sizeof(uint32_t)) && ((ptrdiff_t)buf & sizeof(uint32_t))) {
+            c = __crc32w(c, *buf4++);
+            len -= sizeof(uint32_t);
+        }
+
+        buf8 = (const uint64_t *) buf4;
+    } else {
+        buf8 = (const uint64_t *) buf;
+    }
+
+    while (len >= sizeof(uint64_t)) {
+        c = __crc32d(c, *buf8++);
+        len -= sizeof(uint64_t);
+    }
+
+    if (len >= sizeof(uint32_t)) {
+        buf4 = (const uint32_t *) buf8;
+        c = __crc32w(c, *buf4++);
+        len -= sizeof(uint32_t);
+        buf2 = (const uint16_t *) buf4;
+    } else {
+        buf2 = (const uint16_t *) buf8;
+    }
+
+    if (len >= sizeof(uint16_t)) {
+        c = __crc32h(c, *buf2++);
+        len -= sizeof(uint16_t);
+    }
+
+    buf = (const unsigned char *) buf2;
+    if (len) {
+        c = __crc32b(c, *buf);
+    }
+
+    c = ~c;
+    return c;
+}
+#endif