X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/b0d623f7f2ae71ed96e60569f61f9a9a27016e80..008676633c2ad2c325837c2b64915f7ded690a8f:/osfmk/x86_64/bzero.s

diff --git a/osfmk/x86_64/bzero.s b/osfmk/x86_64/bzero.s
index cb2426300..be490d18c 100644
--- a/osfmk/x86_64/bzero.s
+++ b/osfmk/x86_64/bzero.s
@@ -84,11 +84,33 @@ ENTRY(memset)
 	movq	%r8 ,%rax		/* returns its first argument */
 	ret
 
+/*
+ * void *memset_word(void * addr, int pattern, size_t length)
+ */
+
+ENTRY(memset_word)
+	movq	%rdi, %r8
+	movq	%rsi, %rax		/* move pattern (arg2) to rax */
+	mov	%eax, %ecx
+	shlq	$32,%rax
+	orq	%rcx, %rax 
+	cld				/* reset direction flag */
+	movq 	%rdx, %rcx		/* mov quads first */
+	shrq	$1, %rcx
+	rep
+	stosq
+	movq	%rdx,%rcx		/* if necessary, mov 32 bit word */
+	andq	$1,%rcx
+	rep
+	stosl
+	movq	%r8 ,%rax		/* returns its first argument */
+	ret
+
 /*
  * void bzero(char * addr, size_t length)
  */
 Entry(blkclr)
-ENTRY(bzero)
+ENTRY2(bzero,__bzero)
 	movq	%rsi,%rcx
 	xorq	%rax,%rax
 	shrq	$3,%rcx