diff options
Diffstat (limited to 'usr/src/uts/intel/ia32/ml/ovbcopy.s')
| -rw-r--r-- | usr/src/uts/intel/ia32/ml/ovbcopy.s | 68 |
1 files changed, 3 insertions, 65 deletions
diff --git a/usr/src/uts/intel/ia32/ml/ovbcopy.s b/usr/src/uts/intel/ia32/ml/ovbcopy.s index 6774f392e5..0687e67e4b 100644 --- a/usr/src/uts/intel/ia32/ml/ovbcopy.s +++ b/usr/src/uts/intel/ia32/ml/ovbcopy.s @@ -3,7 +3,9 @@ * Use is subject to license terms. */ -#pragma ident "%Z%%M% %I% %E% SMI" +/* + * Copyright 2019 Joyent, Inc. + */ /*- * Copyright (c) 1993 The Regents of the University of California. @@ -42,18 +44,6 @@ #include <sys/asm_linkage.h> -#if defined(__lint) - -/* - * Overlapping bcopy (source and target may overlap arbitrarily). - */ -/* ARGSUSED */ -void -ovbcopy(const void *from, void *to, size_t count) -{} - -#else /* __lint */ - /* * Adapted from fbsd bcopy(). * @@ -62,8 +52,6 @@ ovbcopy(const void *from, void *to, size_t count) * ws@tools.de (Wolfgang Solfrank, TooLs GmbH) +49-228-985800 */ -#if defined(__amd64) - ENTRY(ovbcopy) xchgq %rsi,%rdi movq %rdx,%rcx @@ -102,53 +90,3 @@ reverse: ret SET_SIZE(ovbcopy) -#elif defined(__i386) - - ENTRY(ovbcopy) - pushl %esi - pushl %edi - movl 12(%esp),%esi - movl 16(%esp),%edi - movl 20(%esp),%ecx - - movl %edi,%eax - subl %esi,%eax - cmpl %ecx,%eax /* overlapping && src < dst? */ - jb reverse - - shrl $2,%ecx /* copy by 32-bit words */ - cld /* nope, copy forwards */ - rep - movsl - movl 20(%esp),%ecx - andl $3,%ecx /* any bytes left? */ - rep - movsb - popl %edi - popl %esi - ret - -reverse: - addl %ecx,%edi /* copy backwards */ - addl %ecx,%esi - decl %edi - decl %esi - andl $3,%ecx /* any fractional bytes? */ - std - rep - movsb - movl 20(%esp),%ecx /* copy remainder by 32-bit words */ - shrl $2,%ecx - subl $3,%esi - subl $3,%edi - rep - movsl - popl %edi - popl %esi - cld - ret - SET_SIZE(ovbcopy) - -#endif /* __i386 */ - -#endif /* __lint */ |