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Kernel: Cleanup thread default sse initialization

This commit is contained in:
Bananymous 2024-11-03 20:22:28 +02:00
parent 07275ecb5f
commit ed19bb11fe
1 changed files with 23 additions and 2 deletions
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25
kernel/kernel/Thread.cpp
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@ -36,6 +36,23 @@ namespace Kernel
static pid_t s_next_tid = 1;
#if __enable_sse
alignas(16) static uint8_t s_default_sse_storage[512];
static bool s_default_sse_storage_initialized = false;
static void initialize_default_sse_storage()
{
const uint32_t mxcsr = 0x1F80;
asm volatile(
"finit;"
"ldmxcsr %[mxcsr];"
"fxsave %[storage];"
: [storage]"=m"(s_default_sse_storage)
: [mxcsr]"m"(mxcsr)
);
}
#endif
BAN::ErrorOr<Thread*> Thread::create_kernel(entry_t entry, void* data, Process* process)
{
// Create the thread object
@ -113,8 +130,12 @@ namespace Kernel
: m_tid(tid), m_process(process)
{
#if __enable_sse
// initializes sse storage to valid state
save_sse();
if (!s_default_sse_storage_initialized)
{
initialize_default_sse_storage();
s_default_sse_storage_initialized = true;
}
memcpy(m_sse_storage, s_default_sse_storage, sizeof(m_sse_storage));
#endif
}