#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> */ #ifndef __ASSEMBLY__ #include <linux/config.h> /* include compiler specific intrinsics */ #include <asm/ia64regs.h> #ifdef __INTEL_COMPILER # include <asm/intel_intrin.h> #else # include <asm/gcc_intrin.h> #endif /* * 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,sem) \ ({ \ switch (sz) { \ case 4: \ tmp = ia64_fetchadd4_##sem((unsigned int *) v, n); \ break; \ \ case 8: \ tmp = ia64_fetchadd8_##sem((unsigned long *) v, n); \ break; \ \ default: \ __bad_size_for_ia64_fetch_and_add(); \ } \ }) #define ia64_fetchadd(i,v,sem) \ ({ \ __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)), sem); \ else if ((i) == -8) \ IA64_FETCHADD(_tmp, _v, -8, sizeof(*(v)), sem); \ else if ((i) == -4) \ IA64_FETCHADD(_tmp, _v, -4, sizeof(*(v)), sem); \ else if ((i) == -1) \ IA64_FETCHADD(_tmp, _v, -1, sizeof(*(v)), sem); \ else if ((i) == 1) \ IA64_FETCHADD(_tmp, _v, 1, sizeof(*(v)), sem); \ else if ((i) == 4) \ IA64_FETCHADD(_tmp, _v, 4, sizeof(*(v)), sem); \ else if ((i) == 8) \ IA64_FETCHADD(_tmp, _v, 8, sizeof(*(v)), sem); \ else if ((i) == 16) \ IA64_FETCHADD(_tmp, _v, 16, sizeof(*(v)), sem); \ else \ _tmp = __bad_increment_for_ia64_fetch_and_add(); \ (__typeof__(*(v))) (_tmp); /* return old value */ \ }) #define ia64_fetch_and_add(i,v) (ia64_fetchadd(i, v, rel) + (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 ia64_xchg_called_with_bad_pointer (void); #define __xchg(x,ptr,size) \ ({ \ unsigned long __xchg_result; \ \ switch (size) { \ case 1: \ __xchg_result = ia64_xchg1((__u8 *)ptr, x); \ break; \ \ case 2: \ __xchg_result = ia64_xchg2((__u16 *)ptr, x); \ break; \ \ case 4: \ __xchg_result = ia64_xchg4((__u32 *)ptr, x); \ break; \ \ case 8: \ __xchg_result = ia64_xchg8((__u64 *)ptr, x); \ break; \ default: \ ia64_xchg_called_with_bad_pointer(); \ } \ __xchg_result; \ }) #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 ia64_cmpxchg_called_with_bad_pointer (void); #define ia64_cmpxchg(sem,ptr,old,new,size) \ ({ \ __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; \ } \ switch (size) { \ case 1: \ _r_ = ia64_cmpxchg1_##sem((__u8 *) ptr, new, _o_); \ break; \ \ case 2: \ _r_ = ia64_cmpxchg2_##sem((__u16 *) ptr, new, _o_); \ break; \ \ case 4: \ _r_ = ia64_cmpxchg4_##sem((__u32 *) ptr, new, _o_); \ break; \ \ case 8: \ _r_ = ia64_cmpxchg8_##sem((__u64 *) ptr, new, _o_); \ break; \ \ default: \ _r_ = ia64_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, ...); \ ip = (void *) ia64_getreg(_IA64_REG_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 #endif /* _ASM_IA64_INTRINSICS_H */