summaryrefslogtreecommitdiff
path: root/kernel/src/cpu/fpu.asm
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/src/cpu/fpu.asm')
-rw-r--r--kernel/src/cpu/fpu.asm19
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/src/cpu/fpu.asm b/kernel/src/cpu/fpu.asm
new file mode 100644
index 0000000..e49ab6f
--- /dev/null
+++ b/kernel/src/cpu/fpu.asm
@@ -0,0 +1,19 @@
+global fpu_init
+
+fpu_init:
+ mov edx, cr0
+ and edx, (-1) - ((1 << 3) + (1 << 4))
+ mov cr0, edx
+ fninit
+ fnstsw [test]
+ cmp word [test], 0
+ jne no_fpu
+
+ xor eax, 0
+ ret
+
+no_fpu:
+ mov eax, 1
+ ret
+
+test: dw 0x55AA