URL
https://opencores.org/ocsvn/or1k/or1k/trunk
Subversion Repositories or1k
[/] [or1k/] [trunk/] [linux/] [linux-2.4/] [include/] [asm-ia64/] [intrinsics.h] - Rev 1765
Compare with Previous | Blame | View Log
#ifndef _ASM_IA64_INTRINSICS_H #define _ASM_IA64_INTRINSICS_H /* * Compiler-dependent intrinsics. * * Copyright (C) 2002-2003 Hewlett-Packard Co * David Mosberger-Tang <davidm@hpl.hp.com> */ #include <linux/config.h> /* * Force an unresolved reference if someone tries to use * ia64_fetch_and_add() with a bad value. */ extern unsigned long __bad_size_for_ia64_fetch_and_add (void); extern unsigned long __bad_increment_for_ia64_fetch_and_add (void); #define IA64_FETCHADD(tmp,v,n,sz) \ ({ \ switch (sz) { \ case 4: \ __asm__ __volatile__ ("fetchadd4.rel %0=[%1],%2" \ : "=r"(tmp) : "r"(v), "i"(n) : "memory"); \ break; \ \ case 8: \ __asm__ __volatile__ ("fetchadd8.rel %0=[%1],%2" \ : "=r"(tmp) : "r"(v), "i"(n) : "memory"); \ break; \ \ default: \ __bad_size_for_ia64_fetch_and_add(); \ } \ }) #define ia64_fetch_and_add(i,v) \ ({ \ __u64 _tmp; \ volatile __typeof__(*(v)) *_v = (v); \ /* Can't use a switch () here: gcc isn't always smart enough for that... */ \ if ((i) == -16) \ IA64_FETCHADD(_tmp, _v, -16, sizeof(*(v))); \ else if ((i) == -8) \ IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v))); \ else if ((i) == -4) \ IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v))); \ else if ((i) == -2) \ IA64_FETCHADD(_tmp, _v, -2, sizeof(*(v))); \ else if ((i) == -1) \ IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v))); \ else if ((i) == 1) \ IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v))); \ else if ((i) == 2) \ IA64_FETCHADD(_tmp, _v, 2, sizeof(*(v))); \ else if ((i) == 4) \ IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v))); \ else if ((i) == 8) \ IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v))); \ else if ((i) == 16) \ IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v))); \ else \ _tmp = __bad_increment_for_ia64_fetch_and_add(); \ (__typeof__(*(v))) (_tmp + (i)); /* return new value */ \ }) /* * This function doesn't exist, so you'll get a linker error if * something tries to do an invalid xchg(). */ extern void __xchg_called_with_bad_pointer (void); static __inline__ unsigned long __xchg (unsigned long x, volatile void *ptr, int size) { unsigned long result; switch (size) { case 1: __asm__ __volatile ("xchg1 %0=[%1],%2" : "=r" (result) : "r" (ptr), "r" (x) : "memory"); return result; case 2: __asm__ __volatile ("xchg2 %0=[%1],%2" : "=r" (result) : "r" (ptr), "r" (x) : "memory"); return result; case 4: __asm__ __volatile ("xchg4 %0=[%1],%2" : "=r" (result) : "r" (ptr), "r" (x) : "memory"); return result; case 8: __asm__ __volatile ("xchg8 %0=[%1],%2" : "=r" (result) : "r" (ptr), "r" (x) : "memory"); return result; } __xchg_called_with_bad_pointer(); return x; } #define xchg(ptr,x) \ ((__typeof__(*(ptr))) __xchg ((unsigned long) (x), (ptr), sizeof(*(ptr)))) /* * Atomic compare and exchange. Compare OLD with MEM, if identical, * store NEW in MEM. Return the initial value in MEM. Success is * indicated by comparing RETURN with OLD. */ #define __HAVE_ARCH_CMPXCHG 1 /* * This function doesn't exist, so you'll get a linker error * if something tries to do an invalid cmpxchg(). */ extern long __cmpxchg_called_with_bad_pointer(void); #define ia64_cmpxchg(sem,ptr,old,new,size) \ ({ \ __typeof__(ptr) _p_ = (ptr); \ __typeof__(new) _n_ = (new); \ __u64 _o_, _r_; \ \ switch (size) { \ case 1: _o_ = (__u8 ) (long) (old); break; \ case 2: _o_ = (__u16) (long) (old); break; \ case 4: _o_ = (__u32) (long) (old); break; \ case 8: _o_ = (__u64) (long) (old); break; \ default: break; \ } \ __asm__ __volatile__ ("mov ar.ccv=%0;;" :: "rO"(_o_)); \ switch (size) { \ case 1: \ __asm__ __volatile__ ("cmpxchg1."sem" %0=[%1],%2,ar.ccv" \ : "=r"(_r_) : "r"(_p_), "r"(_n_) : "memory"); \ break; \ \ case 2: \ __asm__ __volatile__ ("cmpxchg2."sem" %0=[%1],%2,ar.ccv" \ : "=r"(_r_) : "r"(_p_), "r"(_n_) : "memory"); \ break; \ \ case 4: \ __asm__ __volatile__ ("cmpxchg4."sem" %0=[%1],%2,ar.ccv" \ : "=r"(_r_) : "r"(_p_), "r"(_n_) : "memory"); \ break; \ \ case 8: \ __asm__ __volatile__ ("cmpxchg8."sem" %0=[%1],%2,ar.ccv" \ : "=r"(_r_) : "r"(_p_), "r"(_n_) : "memory"); \ break; \ \ default: \ _r_ = __cmpxchg_called_with_bad_pointer(); \ break; \ } \ (__typeof__(old)) _r_; \ }) #define cmpxchg_acq(ptr,o,n) ia64_cmpxchg("acq", (ptr), (o), (n), sizeof(*(ptr))) #define cmpxchg_rel(ptr,o,n) ia64_cmpxchg("rel", (ptr), (o), (n), sizeof(*(ptr))) /* for compatibility with other platforms: */ #define cmpxchg(ptr,o,n) cmpxchg_acq(ptr,o,n) #ifdef CONFIG_IA64_DEBUG_CMPXCHG # define CMPXCHG_BUGCHECK_DECL int _cmpxchg_bugcheck_count = 128; # define CMPXCHG_BUGCHECK(v) \ do { \ if (_cmpxchg_bugcheck_count-- <= 0) { \ void *ip; \ extern int printk(const char *fmt, ...); \ asm ("mov %0=ip" : "=r"(ip)); \ printk("CMPXCHG_BUGCHECK: stuck at %p on word %p\n", ip, (v)); \ break; \ } \ } while (0) #else /* !CONFIG_IA64_DEBUG_CMPXCHG */ # define CMPXCHG_BUGCHECK_DECL # define CMPXCHG_BUGCHECK(v) #endif /* !CONFIG_IA64_DEBUG_CMPXCHG */ #endif /* _ASM_IA64_INTRINSICS_H */