Add 'neozip/' from commit 'c2712b8a345191f6ed79558c089777df94590087'

git-subtree-dir: neozip
git-subtree-mainline: b1e34e861b5d732afe828d58aad2c638135061fd
git-subtree-split: c2712b8a345191f6ed79558c089777df94590087

1 files changed, 36 insertions, 0 deletions

diff --git a/neozip/crc32_braid_p.h b/neozip/crc32_braid_p.h
new file mode 100644
index 0000000000..624e22ecd9
--- /dev/null
+++ b/neozip/crc32_braid_p.h
@@ -0,0 +1,36 @@
+#ifndef CRC32_BRAID_P_H_
+#define CRC32_BRAID_P_H_
+
+#include "zendian.h"
+
+/* Define BRAID_N, valid range is 1..6 */
+#define BRAID_N 5
+
+/* Define BRAID_W and the associated z_word_t type. If BRAID_W is not defined, then a braided
+   calculation is not used, and the associated tables and code are not compiled.
+
+   TODO: According to crc32_braid_c.c, BRAID_N=5, BRAID_W=4 is fastest with Sparc64-VII,
+   PowerPC POWER9, and MIPS64 Octeon II processors.
+ */
+#ifdef ARCH_64BIT
+#  define BRAID_W 8
+    typedef uint64_t z_word_t;
+#  define Z_WORD_FROM_LE(word) Z_U64_FROM_LE(word)
+#else
+#  define BRAID_W 4
+    typedef uint32_t z_word_t;
+#  define Z_WORD_FROM_LE(word) Z_U32_FROM_LE(word)
+#endif
+
+#if BYTE_ORDER == LITTLE_ENDIAN
+#  define BRAID_TABLE crc_braid_table
+#elif BYTE_ORDER == BIG_ENDIAN
+#  define BRAID_TABLE crc_braid_big_table
+#else
+#  error "No endian defined"
+#endif
+
+/* CRC polynomial. */
+#define POLY 0xedb88320         /* p(x) reflected, with x^32 implied */
+
+#endif /* CRC32_BRAID_P_H_ */