X-Git-Url: http://wien.tomnetworks.com/gitweb/?a=blobdiff_plain;f=src%2Fvm%2Fjit%2Fi386%2Fmd.h;h=0756bb26a1db78dbc07a19eb7538b34116e9b38e;hb=d62d56aa9150bb2156dac82966795fdcbd7562e0;hp=562736be4f66d47c4fb2fd343d16a7d75a525a48;hpb=bbc14f3688db91816c8112c1a899c9a44c7305af;p=cacao.git

diff --git a/src/vm/jit/i386/md.h b/src/vm/jit/i386/md.h
index 562736be4..0756bb26a 100644
--- a/src/vm/jit/i386/md.h
+++ b/src/vm/jit/i386/md.h
@@ -1,6 +1,6 @@
 /* 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.
@@ -37,6 +37,30 @@
 
 /* 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
@@ -115,6 +139,23 @@ inline static void md_dcacheflush(void *addr, int nbytes)
 	__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 */