#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) */
-#include "interr.h"
+#define COMPILER_BARRIER \
+ do { __asm__ __volatile__ ( "" : : : "memory"); } while (0)
+
+#ifdef LISP_FEATURE_WIN32
+extern int os_number_of_processors;
+#define yield_on_uniprocessor() \
+ do { if (os_number_of_processors<=1) SwitchToThread(); } while(0)
+#else
+/* Stubs are better than ifdef EVERYWHERE. */
+#define yield_on_uniprocessor() \
+ do {} while(0)
+#endif
+
static inline void
-get_spinlock(volatile lispobj *word,long value)
+get_spinlock(volatile lispobj *word, unsigned long value)
{
#ifdef LISP_FEATURE_SB_THREAD
u32 eax=0;
lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
do {
#if defined(LISP_FEATURE_DARWIN)
- asm ("xor %0,%0;\n\
+ asm volatile ("xor %0,%0;\n\
lock/cmpxchg %1,%2"
: "=a" (eax)
: "r" (value), "m" (*word)
: "memory", "cc");
#else
- asm ("xor %0,%0\n\
+ if (eax!=0) {
+ asm volatile("rep; nop");
+ }
+ asm volatile ("xor %0,%0\n\
lock cmpxchg %1,%2"
: "=a" (eax)
: "r" (value), "m" (*word)
: "memory", "cc");
#endif
-
+ yield_on_uniprocessor();
} while(eax!=0);
#else
*word=value;
static inline void
release_spinlock(volatile lispobj *word)
{
+ /* See comment in RELEASE-SPINLOCK in target-thread.lisp. */
+ COMPILER_BARRIER;
*word=0;
+ COMPILER_BARRIER;
}
-#include <stdio.h>
-
static inline lispobj
swap_lispobjs(volatile lispobj *dest, lispobj value)
{
lispobj old_value;
#if defined(LISP_FEATURE_DARWIN)
- asm ("lock/xchg %0,(%1)"
+ asm volatile ("lock/xchg %0,(%1)"
: "=r" (old_value)
: "r" (dest), "0" (value)
: "memory");
#else
- asm ("lock xchg %0,(%1)"
+ asm volatile ("lock xchg %0,(%1)"
: "=r" (old_value)
: "r" (dest), "0" (value)
: "memory");