1 files changed, 47 insertions, 0 deletions
diff --git a/src/string/i386/memset.s b/src/string/i386/memset.s
new file mode 100644
index 00000000..06ac923e
--- /dev/null
+++ b/src/string/i386/memset.s
@@ -0,0 +1,47 @@
+.global memset
+.type memset,@function
+memset:
+	mov 8(%esp),%al
+	push %edi
+	mov %al,%ah
+	mov %al,%dl
+	mov 16(%esp),%ecx
+	shl $16,%eax
+	mov 8(%esp),%edi
+	mov %dl,%al
+	mov %dl,%ah
+	cmp $16,%ecx
+	jb 1f
+
+	mov %eax,-4(%edi,%ecx)
+	shr $2,%ecx
+	rep
+	stosl
+	mov 8(%esp),%eax
+	pop %edi
+	ret
+
+1:	test %ecx,%ecx
+	jz 1f
+
+	mov %al,(%edi)
+	mov %al,-1(%edi,%ecx)
+	cmp $2,%ecx
+	jbe 1f
+
+	mov %al,1(%edi)
+	mov %al,-2(%edi,%ecx)
+	cmp $4,%ecx
+	jbe 1f
+
+	mov %eax,(%edi)
+	mov %eax,-4(%edi,%ecx)
+	cmp $8,%ecx
+	jbe 1f
+
+	mov %eax,4(%edi)
+	mov %eax,-8(%edi,%ecx)
+
+1:	mov 8(%esp),%eax
+	pop %edi
+	ret