Index: src/runtime/lookup-asm/lookup-asm-x86_64-win64.S
==================================================================
--- src/runtime/lookup-asm/lookup-asm-x86_64-win64.S
+++ src/runtime/lookup-asm/lookup-asm-x86_64-win64.S
@@ -13,84 +13,84 @@
  * file.
  */
 
 #include "config.h"
 
-.intel_syntax noprefix
-
 .globl objc_msg_lookup
 .globl objc_msg_lookup_stret
 .globl objc_msg_lookup_super
 .globl objc_msg_lookup_super_stret
 
 .section .text
 .macro generate_lookup name not_found
 \name:
-	test	rcx, rcx
-	jz	short ret_nil
-
-	test	cl, 1
-	jnz	short .Ltagged_pointer_\name
-
-	mov	r8, [rcx]
-	mov	r8, [r8+56]
+	testq	%rcx, %rcx
+	jz	ret_nil
+
+	testb	$1, %cl
+	jnz	.Ltagged_pointer_\name
+
+	movq	(%rcx), %r8
+	movq	56(%r8), %r8
 
 .Lmain_\name:
-	mov	r10, rcx
-	mov	r11, rdx
+	movq	%rcx, %r10
+	movq	%rdx, %r11
 
-	mov	rax, [rdx]
-	movzx	ecx, ah
-	movzx	edx, al
+	movq	(%rdx), %rax
+	movzbl	%ah, %ecx
+	movzbl	%al, %edx
 #ifdef OF_SELUID24
-	shr	eax, 16
+	shrl	$16, %eax
 
-	mov	r8,  [r8+rax*8]
+	movq	(%r8,%rax,8), %r8
 #endif
-	mov	r8,  [r8+rcx*8]
-	mov	rax, [r8+rdx*8]
+	movq	(%r8,%rcx,8), %r8
+	movq	(%r8,%rdx,8), %rax
 
-	test	rax, rax
-	jz	short 0f
+	testq	%rax, %rax
+	jz	0f
 
 	ret
 
 0:
-	mov	rcx, r10
-	mov	rdx, r11
+	movq	%r10, %rcx
+	movq	%r11, %rdx
 	jmp	\not_found
 
 .Ltagged_pointer_\name:
-	xor	rcx, objc_tagged_pointer_secret
-	and	cl, 0xE
-	movzx	r8, cl
-
-	mov	r8, [objc_tagged_pointer_classes+r8*4]
-	mov	r8, [r8+56]
-
-	jmp	short .Lmain_\name
+	movq	objc_tagged_pointer_secret(%rip), %rax
+	xorq	(%rax), %rcx
+	andb	$0xE, %cl
+	movzbl	%cl, %r8d
+
+	movq	objc_tagged_pointer_classes(%rip), %rax
+	movq	(%rax,%r8,4), %r8
+	movq	56(%r8), %r8
+
+	jmp	.Lmain_\name
 .endm
 
 .macro generate_lookup_super name lookup
 \name:
-	mov	r8, rcx
-	mov	rcx, [rcx]
-	test	rcx, rcx
-	jz	short ret_nil
-
-	mov	r8, [r8+8]
-	mov	r8, [r8+56]
-	jmp	short .Lmain_\lookup
+	movq	%rcx, %r8
+	movq	(%rcx), %rcx
+	testq	%rcx, %rcx
+	jz	ret_nil
+
+	movq	8(%r8), %r8
+	movq	56(%r8), %r8
+	jmp	.Lmain_\lookup
 .endm
 
 generate_lookup objc_msg_lookup objc_method_not_found
 generate_lookup objc_msg_lookup_stret objc_method_not_found_stret
 generate_lookup_super objc_msg_lookup_super objc_msg_lookup
 generate_lookup_super objc_msg_lookup_super_stret objc_msg_lookup_stret
 
 ret_nil:
-	mov	rax, offset nil_method
+	movq	nil_method(%rip), %rax
 	ret
 
 nil_method:
-	xor	rax, rax
+	xorq	%rax, %rax
 	ret