1 files changed, 128 insertions, 0 deletions
diff --git a/module/icp/algs/skein/skein_port.h b/module/icp/algs/skein/skein_port.h
new file mode 100644
index 000000000000..1b0225236993
--- /dev/null
+++ b/module/icp/algs/skein/skein_port.h
@@ -0,0 +1,128 @@
+/*
+ * Platform-specific definitions for Skein hash function.
+ *
+ * Source code author: Doug Whiting, 2008.
+ *
+ * This algorithm and source code is released to the public domain.
+ *
+ * Many thanks to Brian Gladman for his portable header files.
+ *
+ * To port Skein to an "unsupported" platform, change the definitions
+ * in this file appropriately.
+ */
+/* Copyright 2013 Doug Whiting. This code is released to the public domain. */
+
+#ifndef	_SKEIN_PORT_H_
+#define	_SKEIN_PORT_H_
+
+#include <sys/types.h>	/* get integer type definitions */
+#include <sys/systm.h>	/* for bcopy() */
+
+#ifndef	RotL_64
+#define	RotL_64(x, N)	(((x) << (N)) | ((x) >> (64 - (N))))
+#endif
+
+/*
+ * Skein is "natively" little-endian (unlike SHA-xxx), for optimal
+ * performance on x86 CPUs. The Skein code requires the following
+ * definitions for dealing with endianness:
+ *
+ *    SKEIN_NEED_SWAP:  0 for little-endian, 1 for big-endian
+ *    Skein_Put64_LSB_First
+ *    Skein_Get64_LSB_First
+ *    Skein_Swap64
+ *
+ * If SKEIN_NEED_SWAP is defined at compile time, it is used here
+ * along with the portable versions of Put64/Get64/Swap64, which
+ * are slow in general.
+ *
+ * Otherwise, an "auto-detect" of endianness is attempted below.
+ * If the default handling doesn't work well, the user may insert
+ * platform-specific code instead (e.g., for big-endian CPUs).
+ *
+ */
+#ifndef	SKEIN_NEED_SWAP		/* compile-time "override" for endianness? */
+
+#include <sys/isa_defs.h>	/* get endianness selection */
+
+#define	PLATFORM_MUST_ALIGN	_ALIGNMENT_REQUIRED
+#if	defined(_BIG_ENDIAN)
+/* here for big-endian CPUs */
+#define	SKEIN_NEED_SWAP   (1)
+#else
+/* here for x86 and x86-64 CPUs (and other detected little-endian CPUs) */
+#define	SKEIN_NEED_SWAP   (0)
+#if	PLATFORM_MUST_ALIGN == 0	/* ok to use "fast" versions? */
+#define	Skein_Put64_LSB_First(dst08, src64, bCnt) bcopy(src64, dst08, bCnt)
+#define	Skein_Get64_LSB_First(dst64, src08, wCnt) \
+	bcopy(src08, dst64, 8 * (wCnt))
+#endif
+#endif
+
+#endif				/* ifndef SKEIN_NEED_SWAP */
+
+/*
+ * Provide any definitions still needed.
+ */
+#ifndef	Skein_Swap64	/* swap for big-endian, nop for little-endian */
+#if	SKEIN_NEED_SWAP
+#define	Skein_Swap64(w64)				\
+	(((((uint64_t)(w64)) & 0xFF) << 56) |		\
+	(((((uint64_t)(w64)) >> 8) & 0xFF) << 48) |	\
+	(((((uint64_t)(w64)) >> 16) & 0xFF) << 40) |	\
+	(((((uint64_t)(w64)) >> 24) & 0xFF) << 32) |	\
+	(((((uint64_t)(w64)) >> 32) & 0xFF) << 24) |	\
+	(((((uint64_t)(w64)) >> 40) & 0xFF) << 16) |	\
+	(((((uint64_t)(w64)) >> 48) & 0xFF) << 8) |	\
+	(((((uint64_t)(w64)) >> 56) & 0xFF)))
+#else
+#define	Skein_Swap64(w64)  (w64)
+#endif
+#endif				/* ifndef Skein_Swap64 */
+
+#ifndef	Skein_Put64_LSB_First
+void
+Skein_Put64_LSB_First(uint8_t *dst, const uint64_t *src, size_t bCnt)
+#ifdef	SKEIN_PORT_CODE		/* instantiate the function code here? */
+{
+	/*
+	 * this version is fully portable (big-endian or little-endian),
+	 * but slow
+	 */
+	size_t n;
+
+	for (n = 0; n < bCnt; n++)
+		dst[n] = (uint8_t)(src[n >> 3] >> (8 * (n & 7)));
+}
+#else
+;				/* output only the function prototype */
+#endif
+#endif				/* ifndef Skein_Put64_LSB_First */
+
+#ifndef	Skein_Get64_LSB_First
+void
+Skein_Get64_LSB_First(uint64_t *dst, const uint8_t *src, size_t wCnt)
+#ifdef	SKEIN_PORT_CODE		/* instantiate the function code here? */
+{
+	/*
+	 * this version is fully portable (big-endian or little-endian),
+	 * but slow
+	 */
+	size_t n;
+
+	for (n = 0; n < 8 * wCnt; n += 8)
+		dst[n / 8] = (((uint64_t)src[n])) +
+		    (((uint64_t)src[n + 1]) << 8) +
+		    (((uint64_t)src[n + 2]) << 16) +
+		    (((uint64_t)src[n + 3]) << 24) +
+		    (((uint64_t)src[n + 4]) << 32) +
+		    (((uint64_t)src[n + 5]) << 40) +
+		    (((uint64_t)src[n + 6]) << 48) +
+		    (((uint64_t)src[n + 7]) << 56);
+}
+#else
+;				/* output only the function prototype */
+#endif
+#endif				/* ifndef Skein_Get64_LSB_First */
+
+#endif	/* _SKEIN_PORT_H_ */