ircd::simd: Add all() template w/ efficient word specializations.

include/ircd/simd/all.h

@@ -0,0 +1,116 @@
+// The Construct
+//
+// Copyright (C) The Construct Developers, Authors & Contributors
+// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
+//
+// Permission to use, copy, modify, and/or distribute this software for all
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice is present in all copies. The
+// full license for this software is available in the LICENSE file.
+
+#pragma once
+#define HAVE_IRCD_SIMD_ALL_H
+
+namespace ircd::simd
+{
+	/// Convenience wrapper around lateral<std::bit_and>()[0] with the most
+	/// efficient lane type conversions made.
+	template<class T>
+	bool all(const T) noexcept = delete;
+}
+
+template<>
+inline bool
+ircd::simd::all(const u64x8 a)
+noexcept
+{
+	return lateral<std::bit_and>(a)[0] == -1UL;
+}
+
+template<>
+inline bool
+ircd::simd::all(const u64x4 a)
+noexcept
+{
+	return lateral<std::bit_and>(a)[0] == -1UL;
+}
+
+template<>
+inline bool
+ircd::simd::all(const u64x2 a)
+noexcept
+{
+	return lateral<std::bit_and>(a)[0] == -1UL;
+}
+
+template<>
+inline bool
+ircd::simd::all(const u32x16 a)
+noexcept
+{
+	return all(u64x8(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u32x8 a)
+noexcept
+{
+	return all(u64x4(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u32x4 a)
+noexcept
+{
+	return all(u64x2(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u16x32 a)
+noexcept
+{
+	return all(u64x8(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u16x16 a)
+noexcept
+{
+	return all(u64x4(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u16x8 a)
+noexcept
+{
+	return all(u64x2(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u8x64 a)
+noexcept
+{
+	return all(u64x8(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u8x32 a)
+noexcept
+{
+	return all(u64x4(a));
+}
+
+template<>
+inline bool
+ircd::simd::all(const u8x16 a)
+noexcept
+{
+	return all(u64x2(a));
+}

include/ircd/simd/simd.h

@@ -31,6 +31,7 @@
 #include "tzcnt.h"
 #include "lateral.h"
 #include "any.h"
+#include "all.h"
 #include "stream.h"
 #include "print.h"