--- Libc/Libc-825.25/i386/string/strcmp.s
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-
-// ***************
-// * S T R C M P *
-// ***************
-//
-// int	strcmp(const char *s1, const char *s2);
-//
-// We optimize the compare by doing it in parallel, using SSE.  This introduces
-// a complication: if we blindly did vector loads from both sides until
-// finding a difference (or 0), we might get a spurious page fault by
-// reading bytes past the difference.  To avoid this, we never do a load
-// that crosses a page boundary.
-
-        .text
-        .globl _strcmp
-
-        .align 	4
-_strcmp:				// int strcmp(const char *s1,const char *s2);
-	pushl	%esi
-	pushl	%edi
-	movl	12(%esp),%esi		// get LHS ptr
-	movl	16(%esp),%edi		// get RHS ptr
-	
-
-// In order to avoid spurious page faults, we loop over:
-//
-//	min( bytes_in_LHS_page, bytes_in_RHS_page) >> 4
-//
-// 16-byte chunks.  When we near a page end, we have to revert to a byte-by-byte
-// comparison until reaching the next page, then resume the vector comparison.
-//	%esi = LHS ptr
-//	%edi = RHS ptr
-
-LNextChunk:
-	movl	%esi,%eax		// copy ptrs
-	movl	%edi,%edx
-	andl	$4095,%eax		// mask down to page offsets
-	andl	$4095,%edx
-	cmpl	%eax,%edx		// which is bigger?
-	cmova	%edx,%eax		// %eax = max(LHS offset, RHS offset);
-	movl	$4096,%edx
-	subl	%eax,%edx		// get #bytes to next page crossing
-	movl	%edx,%eax
-	shrl	$4,%edx			// get #chunks till end of operand or page
-	jnz	LLoopOverChunks		// enter vector loop
-	movl	%eax,%edx		// no chunks...
-	jmp	LLoopOverBytes		// ...so loop over bytes until page end
-
-
-// Loop over bytes.
-//	%esi = LHS ptr
-//	%edi = RHS ptr
-//	%edx = byte count
-
-	.align	4,0x90			// align inner loops to optimize I-fetch
-LLoopOverBytes:
-	movzb	(%esi),%eax		// get LHS byte
-	movzb	(%edi),%ecx		// get RHS byte
-	inc	%esi
-	inc	%edi
-	testl	%eax,%eax		// 0?
-	jz	LExit0			// yes, we're done
-	subl	%ecx,%eax		// compare them
-	jnz	LExit			// done if not equal
-	dec	%edx			// more to go?
-	jnz	LLoopOverBytes
-	
-	jmp	LNextChunk		// we've come to end of page
-
-
-// Loop over 16-byte chunks.
-//	%esi = LHS ptr
-//	%edi = RHS ptr
-//	%edx = chunk count
-
-	.align	4,0x90			// align inner loops to optimize I-fetch
-LLoopOverChunks:
-	movdqu	(%esi),%xmm1		// get LHS
-	movdqu	(%edi),%xmm2		// get RHS
-	pxor	%xmm0,%xmm0		// get some 0s in the shadow of the loads
-	addl	$16,%esi
-	pcmpeqb	%xmm1,%xmm2		// compare LHS to RHS
-	pcmpeqb	%xmm1,%xmm0		// compare LHS to 0s
-	addl	$16,%edi
-	pmovmskb %xmm2,%eax		// get result mask for comparison of LHS and RHS
-	pmovmskb %xmm0,%ecx		// get result mask for 0 check
-	xorl	$0xFFFF,%eax		// complement compare mask so 1 means "not equal"
-	orl	%ecx,%eax		// combine the masks and check for 1-bits
-	jnz	LFoundDiffOr0		// we found differing bytes or a 0-byte
-	dec	%edx			// more to go?
-	jnz	LLoopOverChunks
-	
-	jmp	LNextChunk		// compare up to next page boundary
-	
-
-// Found a zero and/or a difference in vector compare.
-//	%esi = LHS ptr, already advanced by 16
-//	%edi = RHS ptr, already advanced by 16
-//	%eax = bit n set if bytes n differed or were 0
-
-LFoundDiffOr0:
-	bsf	%eax,%edx		// which byte differed or was 0?
-	subl	$16,%esi		// point to start of vectors while we wait for bit scan
-	subl	$16,%edi
-	movzb	(%esi,%edx),%eax	// get LHS byte
-	movzb	(%edi,%edx),%ecx	// get RHS byte
-	subl	%ecx,%eax		// compute difference (ie, return value)
-	popl	%edi
-	popl	%esi
-	ret
-
-
-// Found a zero and/or difference in byte loop.
-//	%eax = LHS byte
-//	%ecx = RHS byte
-
-LExit0:
-	subl	%ecx,%eax		// compute difference (ie, return value)
-LExit:					// here with difference already in %eax
-	popl	%edi
-	popl	%esi
-	ret