patch-2.4.20 linux-2.4.20/arch/x86_64/lib/clear_page.S

• Lines: 35
• Date: Thu Nov 28 15:53:12 2002
• Orig file: linux-2.4.19/arch/x86_64/lib/clear_page.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.19/arch/x86_64/lib/clear_page.S linux-2.4.20/arch/x86_64/lib/clear_page.S
@@ -0,0 +1,34 @@
+	#include <linux/linkage.h>
+
+/*
+ * Zero a page. 	
+ * rdi	page
+ */			
+ENTRY(clear_page)
+	xorl   %eax,%eax
+	movl   $4096/128,%ecx
+	movl   $128,%edx
+loop:
+#define PUT(x) movq %rax,x*8(%rdi) 
+	PUT(0)
+	PUT(1)
+	PUT(2)
+	PUT(3)
+	PUT(4)
+	PUT(5)
+	PUT(6)
+	PUT(7)
+	PUT(8)
+	PUT(9)
+	PUT(10)
+	PUT(11)
+	PUT(12)
+	PUT(13)
+	PUT(14)
+	PUT(15)
+	addq    %rdx,%rdi
+	decl	%ecx
+	jnz	loop
+	sfence	
+	ret
+