From 72df91d99ba7e9a032d6cb171571e075d0f6ce53 Mon Sep 17 00:00:00 2001
From: Freya Murphy <freya@freyacat.org>
Date: Fri, 2 Feb 2024 16:41:19 -0500
Subject: pretty colors

---
 src/arch/amd64/fpu.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 src/arch/amd64/fpu.c

(limited to 'src/arch/amd64/fpu.c')

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));
+}
-- 
cgit v1.2.3-freya