1 files changed, 12 insertions, 0 deletions
diff --git a/src/arch/amd64/fpu.c b/src/arch/amd64/fpu.c
new file mode 100644
index 0000000..551485e
--- /dev/null
+++ b/src/arch/amd64/fpu.c
@@ -0,0 +1,12 @@
+#include <fpu.h>
+#include <stddef.h>
+#include <stdint.h>
+
+void enable_fpu() {
+	size_t cr4;
+	uint16_t cw = 0x37F;
+	__asm__ volatile ("mov %%cr4, %0" : "=r"(cr4));
+	cr4 |= 0x200;
+	__asm__ volatile ("mov %0, %%cr4" :: "r"(cr4));
+	__asm__ volatile("fldcw %0" :: "m"(cw));
+}