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x86-64-arch.h    76 lines (66 with data), 2.0 kB

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/* FIXME: Aren't preprocessor symbols with underscore prefixes
* reserved for the system libraries? If so, it would be tidy to
* rename flags like _X86_ARCH_H so their names are in a part of the
* namespace that we control. */
#ifndef _X86_64_ARCH_H
#define _X86_64_ARCH_H
#ifndef SBCL_GENESIS_CONFIG
#error genesis/config.h (or sbcl.h) must be included before this file
#endif
#include "interr.h" /* for declaration of lose() */
#define ARCH_HAS_STACK_POINTER
#define ALIEN_STACK_GROWS_DOWNWARD
/* FIXME: Do we also want
* #define ARCH_HAS_FLOAT_REGISTERS
* here? (The answer wasn't obvious to me when merging the
* architecture-abstracting patches for CSR's SPARC port. -- WHN 2002-02-15) */
#define COMPILER_BARRIER \
do { __asm__ __volatile__ ( "" : : : "memory"); } while (0)
static inline void
get_spinlock(volatile lispobj *word, unsigned long value)
{
#ifdef LISP_FEATURE_SB_THREAD
u64 rax=0;
if(*word==value)
lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
do {
#if defined(LISP_FEATURE_DARWIN)
asm volatile
("xor %0,%0\n\
lock/cmpxchg %1,%2"
: "=a" (rax)
: "r" (value), "m" (*word)
: "memory", "cc");
#else
asm volatile
("xor %0,%0\n\
lock cmpxchg %1,%2"
: "=a" (rax)
: "r" (value), "m" (*word)
: "memory", "cc");
#endif
} while(rax!=0);
#else
*word=value;
#endif
}
static inline void
release_spinlock(volatile lispobj *word)
{
/* See comment in RELEASE-SPINLOCK in target-thread.lisp. */
COMPILER_BARRIER;
*word=0;
COMPILER_BARRIER;
}
static inline lispobj
swap_lispobjs(volatile lispobj *dest, lispobj value)
{
lispobj old_value;
asm volatile
("lock xchg %0,(%1)"
: "=r" (old_value)
: "r" (dest), "0" (value)
: "memory");
return old_value;
}
#endif /* _X86_64_ARCH_H */