/* src/vm/jit/i386/md.h - machine dependent i386 functions
- Copyright (C) 1996-2005, 2006, 2007, 2008
+ Copyright (C) 1996-2005, 2006, 2007, 2008, 2009
CACAOVM - Verein zur Foerderung der freien virtuellen Maschine CACAO
This file is part of CACAO.
#include <assert.h>
#include <stdint.h>
-#include "vm/jit/codegen-common.h"
+#include "vm/jit/codegen-common.hpp"
#include "vm/jit/methodtree.h"
/* inline functions ***********************************************************/
+/**
+ * Returns the size (in bytes) of the current stackframe, specified by
+ * the passed codeinfo structure.
+ */
+inline static int32_t md_stacktrace_get_framesize(codeinfo* code)
+{
+ int32_t stackframesize;
+
+ // Check for the asm_vm_call_method special case.
+ if (code == NULL)
+ return 0;
+
+ // On i386 we use 8-byte stackslots.
+ stackframesize = code->stackframesize * 8;
+
+ // If there is a stackframe present, we need to take the alignment
+ // compensation for the stored return address into account.
+ if (stackframesize != 0)
+ stackframesize += 4;
+
+ return stackframesize;
+}
+
+
/* md_stacktrace_get_returnaddress *********************************************
Returns the return address of the current stackframe, specified by
inline static void md_cacheflush(void *addr, int nbytes)
{
- /* do nothing */
+ // Compiler optimization barrier (see PR97).
+ __asm__ __volatile__ ("" : : : "memory");
}
inline static void md_icacheflush(void *addr, int nbytes)
{
- /* do nothing */
+ // Compiler optimization barrier (see PR97).
+ __asm__ __volatile__ ("" : : : "memory");
}
inline static void md_dcacheflush(void *addr, int nbytes)
{
- /* do nothing */
+ // Compiler optimization barrier (see PR97).
+ __asm__ __volatile__ ("" : : : "memory");
+}
+
+
+/* md_get_cycle_count **********************************************************
+
+ Get the current time-stamp counter from the CPU.
+
+*******************************************************************************/
+
+inline static uint64_t md_get_cycle_count()
+{
+ uint64_t cycles;
+
+ // Get current cycles count from the CPU.
+ __asm__ __volatile__ ("rdtsc" : "=A" (cycles));
+
+ return cycles;
}
#endif /* _VM_JIT_I386_MD_H */