107 lines
2.4 KiB
C++
107 lines
2.4 KiB
C++
/* SPDX-FileCopyrightText: 2024 Blender Authors
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*
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* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup creator
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*/
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#include <string>
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#if defined(WIN32)
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# include <Windows.h>
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# include <intrin.h>
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#endif
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/* The code below is duplicated from system.c from bf_blenlib. This is on purpose, since bf_blenlib
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* may be build with CPU flags that are not available on the current cpu so we can't link it. */
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#if !defined(_WIN32)
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static void __cpuid(
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/* Cannot be const, because it is modified below.
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* NOLINTNEXTLINE: readability-non-const-parameter. */
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int data[4],
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int selector)
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{
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# if defined(__x86_64__)
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asm("cpuid" : "=a"(data[0]), "=b"(data[1]), "=c"(data[2]), "=d"(data[3]) : "a"(selector));
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# else
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(void)selector;
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data[0] = data[1] = data[2] = data[3] = 0;
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# endif
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}
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#endif
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static int cpu_supports_sse42()
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{
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int result[4], num;
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__cpuid(result, 0);
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num = result[0];
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if (num >= 1) {
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__cpuid(result, 0x00000001);
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return (result[2] & (int(1) << 20)) != 0;
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}
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return 0;
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}
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static const char *cpu_brand_string()
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{
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static char buf[49] = {0};
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int result[4] = {0};
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__cpuid(result, 0x80000000);
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if (result[0] >= int(0x80000004)) {
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__cpuid((int *)(buf + 0), 0x80000002);
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__cpuid((int *)(buf + 16), 0x80000003);
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__cpuid((int *)(buf + 32), 0x80000004);
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const char *buf_ptr = buf;
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// Trim any leading spaces.
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while (*buf_ptr == ' ') {
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buf_ptr++;
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}
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return buf_ptr;
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}
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return nullptr;
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}
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#ifdef _MSC_VER
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extern "C" __declspec(dllexport) void cpu_check_win32()
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{
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# ifdef _M_X64
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if (!cpu_supports_sse42()) {
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std::string error_title = "Unsupported CPU - " + std::string(cpu_brand_string());
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MessageBoxA(NULL,
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"Blender requires a CPU with SSE42 support.",
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error_title.c_str(),
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MB_OK | MB_ICONERROR);
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exit(-1);
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}
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# endif
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}
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BOOL WINAPI DllMain(HINSTANCE /*hinstDLL*/, DWORD fdwReason, LPVOID /*lpvReserved*/)
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{
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switch (fdwReason) {
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case DLL_PROCESS_ATTACH:
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cpu_check_win32();
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break;
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}
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return TRUE;
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}
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#else
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# include <cstdio>
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# include <cstdlib>
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static __attribute__((constructor)) void cpu_check()
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{
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# ifdef __x86_64
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if (!cpu_supports_sse42()) {
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std::string error = "Unsupported CPU - " + std::string(cpu_brand_string()) +
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"\nBlender requires a CPU with SSE42 support.";
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printf("%s\n", error.c_str());
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exit(-1);
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}
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return;
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# endif
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}
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#endif
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