--- dyld/dyld-210.2.3/src/threadLocalHelpers.s
+++ dyld/dyld-239.4/src/threadLocalHelpers.s
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2010-2013 Apple Inc. All rights reserved.
  *
  * @APPLE_LICENSE_HEADER_START@
  * 
@@ -21,10 +21,16 @@
  * @APPLE_LICENSE_HEADER_END@
  */
  
- 
- 
+#include <System/machine/cpu_capabilities.h>
+
+// bool save_xxm = (*((uint32_t*)_COMM_PAGE_CPU_CAPABILITIES) & kHasAVX1_0) != 0;
+
 #if __x86_64__
 	// returns address of TLV in %rax, all other registers preserved
+	#define FP_SAVE			-192
+	#define VECTOR_SAVE		-704
+	#define STACK_SIZE		704
+
 	.globl _tlv_get_addr
 	.private_extern _tlv_get_addr
 _tlv_get_addr:
@@ -37,7 +43,7 @@
 LlazyAllocate:
 	pushq	%rbp
 	movq	%rsp, %rbp
-	subq	$592,%rsp
+	subq	$STACK_SIZE,%rsp				// fxsave uses 512 bytes of store, xsave uses 
 	movq	%rdi,-8(%rbp)
 	movq	%rsi,-16(%rbp)
 	movq	%rdx,-24(%rbp)
@@ -46,11 +52,87 @@
 	movq	%r9,-48(%rbp)
 	movq	%r10,-56(%rbp)
 	movq	%r11,-64(%rbp)
-	fxsave  -592(%rbp)
+	fnsave	FP_SAVE(%rbp)
+	movq    $(_COMM_PAGE_CPU_CAPABILITIES), %rcx
+	movl    (%rcx), %ecx
+	testl   $kHasAVX1_0, %ecx
+	jne     L2
+	movdqa	%xmm0, VECTOR_SAVE+0x00(%rbp)
+	movdqa	%xmm1, VECTOR_SAVE+0x10(%rbp)
+	movdqa	%xmm2, VECTOR_SAVE+0x20(%rbp)
+	movdqa	%xmm3, VECTOR_SAVE+0x30(%rbp)
+	movdqa	%xmm4, VECTOR_SAVE+0x40(%rbp)
+	movdqa	%xmm5, VECTOR_SAVE+0x50(%rbp)
+	movdqa	%xmm6, VECTOR_SAVE+0x60(%rbp)
+	movdqa	%xmm7, VECTOR_SAVE+0x70(%rbp)
+	movdqa	%xmm8, VECTOR_SAVE+0x80(%rbp)
+	movdqa	%xmm9, VECTOR_SAVE+0x90(%rbp)
+	movdqa	%xmm10,VECTOR_SAVE+0xA0(%rbp)
+	movdqa	%xmm11,VECTOR_SAVE+0xB0(%rbp)
+	movdqa	%xmm12,VECTOR_SAVE+0xC0(%rbp)
+	movdqa	%xmm13,VECTOR_SAVE+0xD0(%rbp)
+	movdqa	%xmm14,VECTOR_SAVE+0xE0(%rbp)
+	movdqa	%xmm15,VECTOR_SAVE+0xF0(%rbp)
+	jmp		L3
+L2:	vmovdqu	%ymm0, VECTOR_SAVE+0x00(%rbp)
+	vmovdqu	%ymm1, VECTOR_SAVE+0x20(%rbp)
+	vmovdqu	%ymm2, VECTOR_SAVE+0x40(%rbp)
+	vmovdqu	%ymm3, VECTOR_SAVE+0x60(%rbp)
+	vmovdqu	%ymm4, VECTOR_SAVE+0x80(%rbp)
+	vmovdqu	%ymm5, VECTOR_SAVE+0xA0(%rbp)
+	vmovdqu	%ymm6, VECTOR_SAVE+0xC0(%rbp)
+	vmovdqu	%ymm7, VECTOR_SAVE+0xE0(%rbp)
+	vmovdqu	%ymm8, VECTOR_SAVE+0x100(%rbp)
+	vmovdqu	%ymm9, VECTOR_SAVE+0x120(%rbp)
+	vmovdqu	%ymm10,VECTOR_SAVE+0x140(%rbp)
+	vmovdqu	%ymm11,VECTOR_SAVE+0x160(%rbp)
+	vmovdqu	%ymm12,VECTOR_SAVE+0x180(%rbp)
+	vmovdqu	%ymm13,VECTOR_SAVE+0x1A0(%rbp)
+	vmovdqu	%ymm14,VECTOR_SAVE+0x1C0(%rbp)
+	vmovdqu	%ymm15,VECTOR_SAVE+0x1E0(%rbp)
+L3:	movq	-32(%rbp),%rcx
 	movq	8(%rdi),%rdi			// get key from descriptor
-	call	_tlv_allocate_and_initialize_for_key  
-	fxrstor -592(%rbp)  
-	movq	-64(%rbp),%r11
+	call	_tlv_allocate_and_initialize_for_key
+
+	frstor	FP_SAVE(%rbp)
+	movq    $(_COMM_PAGE_CPU_CAPABILITIES), %rcx
+	movl    (%rcx), %ecx
+	testl   $kHasAVX1_0, %ecx
+	jne     L4
+	movdqa	VECTOR_SAVE+0x00(%rbp), %xmm0
+	movdqa	VECTOR_SAVE+0x10(%rbp), %xmm1
+	movdqa	VECTOR_SAVE+0x20(%rbp), %xmm2
+	movdqa	VECTOR_SAVE+0x30(%rbp), %xmm3
+	movdqa	VECTOR_SAVE+0x40(%rbp), %xmm4
+	movdqa	VECTOR_SAVE+0x50(%rbp), %xmm5
+	movdqa	VECTOR_SAVE+0x60(%rbp), %xmm6
+	movdqa	VECTOR_SAVE+0x70(%rbp), %xmm7
+	movdqa	VECTOR_SAVE+0x80(%rbp), %xmm8
+	movdqa	VECTOR_SAVE+0x90(%rbp), %xmm9
+	movdqa	VECTOR_SAVE+0xA0(%rbp), %xmm10
+	movdqa	VECTOR_SAVE+0xB0(%rbp), %xmm11
+	movdqa	VECTOR_SAVE+0xC0(%rbp), %xmm12
+	movdqa	VECTOR_SAVE+0xD0(%rbp), %xmm13
+	movdqa	VECTOR_SAVE+0xE0(%rbp), %xmm14
+	movdqa	VECTOR_SAVE+0xF0(%rbp), %xmm15
+	jmp		L5
+L4: vmovdqu	VECTOR_SAVE+0x00(%rbp),  %ymm0
+	vmovdqu VECTOR_SAVE+0x20(%rbp),  %ymm1
+	vmovdqu	VECTOR_SAVE+0x40(%rbp),  %ymm2
+	vmovdqu	VECTOR_SAVE+0x60(%rbp),  %ymm3
+	vmovdqu	VECTOR_SAVE+0x80(%rbp),  %ymm4
+	vmovdqu	VECTOR_SAVE+0xA0(%rbp),  %ymm5
+	vmovdqu	VECTOR_SAVE+0xC0(%rbp),  %ymm6
+	vmovdqu	VECTOR_SAVE+0xE0(%rbp),  %ymm7
+	vmovdqu	VECTOR_SAVE+0x100(%rbp), %ymm8
+	vmovdqu	VECTOR_SAVE+0x120(%rbp), %ymm9
+	vmovdqu VECTOR_SAVE+0x140(%rbp), %ymm10
+	vmovdqu	VECTOR_SAVE+0x160(%rbp), %ymm11
+	vmovdqu	VECTOR_SAVE+0x180(%rbp), %ymm12
+	vmovdqu	VECTOR_SAVE+0x1A0(%rbp), %ymm13
+	vmovdqu	VECTOR_SAVE+0x1C0(%rbp), %ymm14
+	vmovdqu	VECTOR_SAVE+0x1E0(%rbp), %ymm15
+L5:	movq	-64(%rbp),%r11
 	movq	-56(%rbp),%r10
 	movq	-48(%rbp),%r9
 	movq	-40(%rbp),%r8
@@ -59,7 +141,7 @@
 	movq	-16(%rbp),%rsi
 	movq	-8(%rbp),%rdi
  	addq	16(%rdi),%rax			// result = buffer + offset
-	addq	$592,%rsp
+	addq	$STACK_SIZE,%rsp
 	popq	%rbp
 	ret
 #endif
@@ -123,4 +205,6 @@
 #endif
 #endif
 
-
+	.subsections_via_symbols
+	
+