* namespace that we control. */
#ifndef _X86_ARCH_H
#define _X86_ARCH_H
-#ifndef SBCL_GENESIS_CONFIG
-#error genesis/config.h (or sbcl.h) must be incuded before this file
-#endif
#ifndef SBCL_GENESIS_CONFIG
-#error genesis/config.h (or sbcl.h) must be incuded before this file
+#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) */
+ * architecture-abstracting patches for CSR's SPARC port. -- WHN 2002-02-15) */
-#ifdef LISP_FEATURE_SB_THREAD
+#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
-extern never_returns lose(char *fmt, ...);
-static inline void
-get_spinlock(volatile lispobj *word,int value)
+static inline void
+get_spinlock(volatile lispobj *word, unsigned long value)
{
+#ifdef LISP_FEATURE_SB_THREAD
u32 eax=0;
- if(*word==value)
- lose("recursive get_spinlock: 0x%x,%d\n",word,value);
+ if(*word==value)
+ lose("recursive get_spinlock: 0x%x,%ld\n",word,value);
do {
- asm ("xor %0,%0\n\
- lock cmpxchg %1,%2"
- : "=a" (eax)
- : "r" (value), "m" (*word)
- : "memory", "cc");
+#if defined(LISP_FEATURE_DARWIN)
+ asm volatile ("xor %0,%0;\n\
+ lock/cmpxchg %1,%2"
+ : "=a" (eax)
+ : "r" (value), "m" (*word)
+ : "memory", "cc");
+#else
+ 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;
+#endif
}
static inline void
release_spinlock(volatile lispobj *word)
{
+ /* See comment in RELEASE-SPINLOCK in target-thread.lisp. */
+ COMPILER_BARRIER;
*word=0;
+ COMPILER_BARRIER;
}
-#else
-
-static inline void
-get_spinlock(lispobj *word, int value)
+static inline lispobj
+swap_lispobjs(volatile lispobj *dest, lispobj value)
{
- *word = value;
+ lispobj old_value;
+#if defined(LISP_FEATURE_DARWIN)
+ asm volatile ("lock/xchg %0,(%1)"
+ : "=r" (old_value)
+ : "r" (dest), "0" (value)
+ : "memory");
+#else
+ asm volatile ("lock xchg %0,(%1)"
+ : "=r" (old_value)
+ : "r" (dest), "0" (value)
+ : "memory");
+#endif
+ return old_value;
}
-static inline void
-release_spinlock(lispobj *word) {
- *word = 0;
-}
+extern void fast_bzero_detect(void *, size_t);
+extern void (*fast_bzero_pointer)(void *, size_t);
-#endif /* LISP_FEATURE_SB_THREAD */
#endif /* _X86_ARCH_H */