LibC: Write memchr, memcmp and strlen with sse

userspace/libraries/LibC/arch/i686/string.S

@@ -1,35 +1,3 @@
-.global memchr
-memchr:
-	xchgl 4(%esp), %edi
-	movl  8(%esp), %eax
-	movl 12(%esp), %ecx
-	movl $1, %edx
-	cmpl $1, %ecx # clear ZF if count is zero
-	repne scasb
-	cmovel %edi, %edx
-	leal -1(%edx), %eax
-	movl 4(%esp), %edi
-	ret
-
-.global memcmp
-memcmp:
-	xchgl 4(%esp), %edi
-	xchgl 8(%esp), %esi
-	movl 12(%esp), %ecx
-	testl %ecx, %ecx # set ZF if count is zero
-	repe cmpsb
-	jne .memcmp_not_equal
-	xorl %eax, %eax
-	jmp .memcmp_done
- .memcmp_not_equal:
-	movzbl -1(%edi), %eax
-	movzbl -1(%esi), %ecx
-	subl %ecx, %eax
- .memcmp_done:
-	movl 4(%esp), %edi
-	movl 8(%esp), %esi
-	ret
-
 .global memcpy
 memcpy:
 	xchgl 4(%esp), %edi
@@ -74,14 +42,3 @@ memset:
 	movl 4(%esp), %edi
 	movl %edx, %eax
 	ret
-
-.global strlen
-strlen:
-	xchgl 4(%esp), %edi
-	xorb %al, %al
-	movl $-1, %ecx
-	repne scasb
-	movl 4(%esp), %edi
-	movl $-2, %eax
-	subl %ecx, %eax
-	ret