PERFORCE change 28177 for review

[Peter Wemm]

http://perforce.freebsd.org/chv.cgi?CH=28177

Change 28177 by peter at peter_overcee on 2003/04/04 21:37:23

	convert su*, nuke bcmp for a C version (todo)

Affected files ...

.. //depot/projects/hammer/sys/x86_64/x86_64/support.s#12 edit

Differences ...

==== //depot/projects/hammer/sys/x86_64/x86_64/support.s#12 (text+ko) ====

@@ -283,18 +283,18 @@
  *	Write a byte (word, longword) to user memory
  */
 ENTRY(suword)
-	movl	PCPU(CURPCB),%ecx
-	movl	$fusufault,PCB_ONFAULT(%ecx)
-	movl	4(%esp),%edx
+	movq	PCPU(CURPCB),%rcx
+	movq	$fusufault,PCB_ONFAULT(%rcx)
+	movq	8(%rsp),%edx
 
-	cmpl	$VM_MAXUSER_ADDRESS-4,%edx	/* verify address validity */
+	cmpq	$VM_MAXUSER_ADDRESS-4,%rdx	/* verify address validity */
 	ja	fusufault
 
-	movl	8(%esp),%eax
-	movl	%eax,(%edx)
-	xorl	%eax,%eax
-	movl	PCPU(CURPCB),%ecx
-	movl	%eax,PCB_ONFAULT(%ecx)
+	movl	16(%rsp),%rax
+	movl	%eax,(%rdx)
+	xorq	%rax,%rax
+	movq	PCPU(CURPCB),%rcx
+	movq	%rax,PCB_ONFAULT(%rcx)
 	ret
 
 ENTRY(suword32)
@@ -304,36 +304,36 @@
  * suword16 - MP SAFE
  */
 ENTRY(suword16)
-	movl	PCPU(CURPCB),%ecx
-	movl	$fusufault,PCB_ONFAULT(%ecx)
-	movl	4(%esp),%edx
+	movq	PCPU(CURPCB),%rcx
+	movq	$fusufault,PCB_ONFAULT(%rcx)
+	movq	8(%rsp),%rdx
 
-	cmpl	$VM_MAXUSER_ADDRESS-2,%edx	/* verify address validity */
+	cmpq	$VM_MAXUSER_ADDRESS-2,%rdx	/* verify address validity */
 	ja	fusufault
 
-	movw	8(%esp),%ax
-	movw	%ax,(%edx)
-	xorl	%eax,%eax
-	movl	PCPU(CURPCB),%ecx		/* restore trashed register */
-	movl	%eax,PCB_ONFAULT(%ecx)
+	movw	16(%rsp),%ax
+	movw	%ax,(%rdx)
+	xorq	%rax,%rax
+	movq	PCPU(CURPCB),%rcx		/* restore trashed register */
+	movq	%rax,PCB_ONFAULT(%rcx)
 	ret
 
 /*
  * subyte - MP SAFE
  */
 ENTRY(subyte)
-	movl	PCPU(CURPCB),%ecx
-	movl	$fusufault,PCB_ONFAULT(%ecx)
-	movl	4(%esp),%edx
+	movq	PCPU(CURPCB),%rcx
+	movq	$fusufault,PCB_ONFAULT(%rcx)
+	movq	8(%rsp),%rdx
 
-	cmpl	$VM_MAXUSER_ADDRESS-1,%edx	/* verify address validity */
+	cmpq	$VM_MAXUSER_ADDRESS-1,%rdx	/* verify address validity */
 	ja	fusufault
 
-	movb	8(%esp),%al
-	movb	%al,(%edx)
-	xorl	%eax,%eax
-	movl	PCPU(CURPCB),%ecx		/* restore trashed register */
-	movl	%eax,PCB_ONFAULT(%ecx)
+	movb	18(%rsp),%al
+	movb	%al,(%rdx)
+	xorq	%rax,%rax
+	movq	PCPU(CURPCB),%rcx		/* restore trashed register */
+	movq	%rax,PCB_ONFAULT(%rcx)
 	ret
 
 /*
@@ -450,34 +450,6 @@
 	popl	%esi
 	ret
 
-ENTRY(bcmp)
-	pushl	%edi
-	pushl	%esi
-	movl	12(%esp),%edi
-	movl	16(%esp),%esi
-	movl	20(%esp),%edx
-	xorl	%eax,%eax
-
-	movl	%edx,%ecx
-	shrl	$2,%ecx
-	cld					/* compare forwards */
-	repe
-	cmpsl
-	jne	1f
-
-	movl	%edx,%ecx
-	andl	$3,%ecx
-	repe
-	cmpsb
-	je	2f
-1:
-	incl	%eax
-2:
-	popl	%esi
-	popl	%edi
-	ret
-
-
 /*
  * Handling of special 386 registers and descriptor tables etc
  */