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/* $OpenBSD: macros.h,v 1.16 2009/08/19 19:47:51 miod Exp $ */
/* $NetBSD: macros.h,v 1.20 2000/07/19 01:02:52 matt Exp $ */
/*
* Copyright (c) 1994, 1998, 2000 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed at Ludd, University of Lule}.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* All bugs are subject to removal without further notice */
#if !defined(_VAX_MACROS_H_) && !defined(lint)
#define _VAX_MACROS_H_
/* Here general macros are supposed to be stored */
static __inline__ int
ffs(int reg)
{
register int val;
__asm__ __volatile ("ffs $0,$32,%1,%0
bneq 1f
mnegl $1,%0
1: incl %0"
: "=&r" (val)
: "r" (reg) );
return val;
}
static __inline__ size_t
strlen(const char *cp)
{
register size_t ret;
__asm__ __volatile("locc $0,$65535,(%1);subl3 r0,$65535,%0"
: "=r" (ret)
: "r" (cp)
: "r0","r1","cc" );
return ret;
}
static __inline__ char *
strncat(char *cp, const char *c2, size_t count)
{
__asm__ __volatile("locc $0,%2,(%1);subl3 r0,%2,r2;
locc $0,$65535,(%0);movc3 r2,(%1),(r1);movb $0,(r3)"
:
: "r" (cp), "r" (c2), "g"(count)
: "r0","r1","r2","r3","r4","r5","memory","cc");
return cp;
}
static __inline__ char *
strncpy(char *cp, const char *c2, size_t len)
{
__asm__ __volatile("movl %2,r2;locc $0,r2,(%1);beql 1f;subl3 r0,%2,r2;
clrb (%0)[r2];1:;movc3 r2,(%1),(%0)"
:
: "r" (cp), "r" (c2), "g"(len)
: "r0","r1","r2","r3","r4","r5","memory","cc");
return cp;
}
static __inline__ void *
memchr(const void *cp, int c, size_t len)
{
void *ret;
__asm__ __volatile("locc %2,%3,(%1);bneq 1f;clrl r1;1:movl r1,%0"
: "=g"(ret)
: "r" (cp), "r" (c), "g"(len)
: "r0","r1","cc");
return ret;
}
static __inline__ int
strcmp(const char *cp, const char *c2)
{
register int ret;
__asm__ __volatile("locc $0,$65535,(%1);subl3 r0,$65535,r0;incl r0;
cmpc3 r0,(%1),(%2);beql 1f;movl $1,r2;
cmpb (r1),(r3);bcc 1f;movl $-1,r2;1:movl r2,%0"
: "=g"(ret)
: "r" (cp), "r" (c2)
: "r0","r1","r2","r3","cc");
return ret;
}
/* End nya */
#if 0 /* unused, but no point in deleting it since it _is_ an instruction */
static __inline__ int locc(int mask, char *cp, size_t size){
register ret;
__asm__ __volatile("locc %1,%2,(%3);movl r0,%0"
: "=r" (ret)
: "r" (mask),"r"(size),"r"(cp)
: "r0","r1" );
return ret;
}
#endif
static __inline__ int
scanc(u_int size, const u_char *cp, const u_char *table, int mask)
{
register int ret;
__asm__ __volatile("scanc %1,(%2),(%3),%4;movl r0,%0"
: "=g"(ret)
: "r"(size),"r"(cp),"r"(table),"r"(mask)
: "r0","r1","r2","r3" );
return ret;
}
static __inline__ int
skpc(int mask, size_t size, u_char *cp)
{
register int ret;
__asm__ __volatile("skpc %1,%2,(%3);movl r0,%0"
: "=g"(ret)
: "r"(mask),"r"(size),"r"(cp)
: "r0","r1" );
return ret;
}
#define cpu_switchto(o, n) \
__asm__ __volatile__( \
"movl %0,r0; movl %1, r1; movpsl -(sp); jsb __cpu_switchto" \
:: "g"(o), "g"(n) : "r0", "r1");
/*
* Interlock instructions. Used both in multiprocessor environments to
* lock between CPUs and in uniprocessor systems when locking is required
* between I/O devices and the master CPU.
*/
/*
* Insqti() locks and inserts an element into the end of a queue.
* Returns -1 if interlock failed, 1 if inserted OK and 0 if first in queue.
*/
static __inline__ int
insqti(void *entry, void *header) {
register int ret;
__asm__ __volatile("
mnegl $1,%0;
insqti (%1),(%2);
bcs 1f; # failed insert
beql 2f; # jump if first entry
movl $1,%0;
brb 1f;
2: clrl %0;
1:;"
: "=&g"(ret)
: "r"(entry), "r"(header)
: "memory");
return ret;
}
/*
* Remqhi() removes an element from the head of the queue.
* Returns -1 if interlock failed, 0 if queue empty, address of the
* removed element otherwise.
*/
static __inline__ void *
remqhi(void *header) {
register void *ret;
__asm__ __volatile("
remqhi (%1),%0;
bcs 1f; # failed interlock
bvs 2f; # nothing was removed
brb 3f;
1: mnegl $1,%0;
brb 3f;
2: clrl %0;
3:;"
: "=&g"(ret)
: "r"(header)
: "memory");
return ret;
}
#define ILCK_FAILED -1 /* Interlock failed */
#define Q_EMPTY 0 /* Queue is/was empty */
#define Q_OK 1 /* Inserted OK */
#endif /* _VAX_MACROS_H_ */
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