初始化内容

third/infoware/src/cpu/instruction_set/instruction_set_windows.cpp

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+// infoware - C++ System information Library
+//
+// Written in 2016-2020 by nabijaczleweli <nabijaczleweli@gmail.com> and ThePhD <phdofthehouse@gmail.com>
+//
+// To the extent possible under law, the author(s) have dedicated all copyright and related
+// and neighboring rights to this software to the public domain worldwide. This software is
+// distributed without any warranty.
+//
+// You should have received a copy of the CC0 Public Domain Dedication along with this software.
+// If not, see <http://creativecommons.org/publicdomain/zero/1.0/>
+
+
+#ifdef _WIN32
+
+
+#include "infoware/cpu.hpp"
+#include <algorithm>
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+
+bool iware::cpu::instruction_set_supported(iware::cpu::instruction_set_t set) {
+	std::vector<iware::cpu::instruction_set_t> ises = supported_instruction_sets();
+	if(std::find(ises.cbegin(), ises.cend(), set) != ises.cend())
+		return true;
+
+	// TODO: is this necessary if we detect things with xgetbv and cpuid?
+	// That is, AVX usually needs to have both OS support alongside
+	DWORD feature;
+	switch(set) {
+		case iware::cpu::instruction_set_t::s3d_now:
+			feature = PF_3DNOW_INSTRUCTIONS_AVAILABLE;
+			break;
+		case iware::cpu::instruction_set_t::mmx:
+			feature = PF_MMX_INSTRUCTIONS_AVAILABLE;
+			break;
+		case iware::cpu::instruction_set_t::sse:
+			feature = PF_XMMI_INSTRUCTIONS_AVAILABLE;
+			break;
+		case iware::cpu::instruction_set_t::sse2:
+			feature = PF_XMMI64_INSTRUCTIONS_AVAILABLE;
+			break;
+		case iware::cpu::instruction_set_t::sse3:
+			feature = PF_SSE3_INSTRUCTIONS_AVAILABLE;
+			break;
+		case iware::cpu::instruction_set_t::avx:
+			feature = PF_XMMI64_INSTRUCTIONS_AVAILABLE;
+			break;
+		default:
+			return false;
+	}
+
+	return IsProcessorFeaturePresent(feature) != 0;
+}
+
+
+#endif