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Another optimization...

This commit is contained in:
mycroft 1995-02-05 01:06:50 +00:00
parent 85ac32e8d2
commit a00897da65
1 changed files with 7 additions and 17 deletions
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24
sys/arch/i386/i386/locore.s
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@ -1,4 +1,4 @@
/* $NetBSD: locore.s,v 1.108 1995/02/04 15:02:28 mycroft Exp $ */
/* $NetBSD: locore.s,v 1.109 1995/02/05 01:06:50 mycroft Exp $ */
#undef DIAGNOSTIC
#define DIAGNOSTIC
@ -1023,7 +1023,6 @@ ENTRY(copyoutstr)
movl $VM_MAXUSER_ADDRESS,%eax
subl %edi,%eax
cmpl %edx,%eax
setae %cl
jae 1f
movl %eax,%edx
movl %eax,20(%esp)
@ -1043,13 +1042,9 @@ ENTRY(copyoutstr)
xorl %eax,%eax
jmp copystr_return
2: /* edx is zero. */
testb %cl,%cl
jnz 1f
/* edx is zero -- hit end of user space. */
movl $EFAULT,%eax
jmp copystr_return
1: /* edx is zero -- return ENAMETOOLONG. */
2: /* edx is zero -- return EFAULT or ENAMETOOLONG. */
cmpl $VM_MAXUSER_ADDRESS,%edi
jae _copystr_fault
movl $ENAMETOOLONG,%eax
jmp copystr_return
#endif /* I486_CPU || I586_CPU */
@ -1077,7 +1072,6 @@ ENTRY(copyinstr)
movl $VM_MAXUSER_ADDRESS,%eax
subl %esi,%eax
cmpl %edx,%eax
setae %cl
jae 1f
movl %eax,%edx
movl %eax,20(%esp)
@ -1097,13 +1091,9 @@ ENTRY(copyinstr)
xorl %eax,%eax
jmp copystr_return
2: /* edx is zero. */
testb %cl,%cl
jnz 1f
/* edx is zero -- hit end of user space. */
movl $EFAULT,%eax
jmp copystr_return
1: /* edx is zero -- return ENAMETOOLONG. */
2: /* edx is zero -- return EFAULT or ENAMETOOLONG. */
cmpl $VM_MAXUSER_ADDRESS,%esi
jae _copystr_fault
movl $ENAMETOOLONG,%eax
jmp copystr_return