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Merge pull request #112279 from bruvzg/l_sse42_err

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[Linux] Add SSE4.2 support runtime check.
This commit is contained in:
Rémi Verschelde
2025-11-01 19:07:07 +01:00
parent 66d2d9ad61 286e578b02
commit 0fdbf050e0
1 changed files with 33 additions and 0 deletions
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33
platform/linuxbsd/godot_linuxbsd.cpp
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@@ -41,6 +41,18 @@
#include <sys/resource.h>
#endif
#if defined(__x86_64) || defined(__x86_64__)
void __cpuid(int *r_cpuinfo, int p_info) {
// Note: Some compilers have a buggy `__cpuid` intrinsic, using inline assembly (based on LLVM-20 implementation) instead.
__asm__ __volatile__(
"xchgq %%rbx, %q1;"
"cpuid;"
"xchgq %%rbx, %q1;"
: "=a"(r_cpuinfo[0]), "=r"(r_cpuinfo[1]), "=c"(r_cpuinfo[2]), "=d"(r_cpuinfo[3])
: "0"(p_info));
}
#endif
// For export templates, add a section; the exporter will patch it to enclose
// the data appended to the executable (bundled PCK).
#if !defined(TOOLS_ENABLED) && defined(__GNUC__)
@@ -54,6 +66,27 @@ extern "C" const char *pck_section_dummy_call() {
#endif
int main(int argc, char *argv[]) {
#if defined(__x86_64) || defined(__x86_64__)
int cpuinfo[4];
__cpuid(cpuinfo, 0x01);
if (!(cpuinfo[2] & (1 << 20))) {
printf("A CPU with SSE4.2 instruction set support is required.\n");
int ret = system("zenity --warning --title \"Godot Engine\" --text \"A CPU with SSE4.2 instruction set support is required.\" 2> /dev/null");
if (ret != 0) {
ret = system("kdialog --title \"Godot Engine\" --sorry \"A CPU with SSE4.2 instruction set support is required.\" 2> /dev/null");
}
if (ret != 0) {
ret = system("Xdialog --title \"Godot Engine\" --msgbox \"A CPU with SSE4.2 instruction set support is required.\" 0 0 2> /dev/null");
}
if (ret != 0) {
ret = system("xmessage -center -title \"Godot Engine\" \"A CPU with SSE4.2 instruction set support is required.\" 2> /dev/null");
}
abort();
}
#endif
#if defined(SANITIZERS_ENABLED)
// Note: Set stack size to be at least 30 MB (vs 8 MB default) to avoid overflow, address sanitizer can increase stack usage up to 3 times.
struct rlimit stack_lim = { 0x1E00000, 0x1E00000 };