--- linuxsampler/trunk/src/common/RTMath.cpp	2004/12/21 14:22:55	327
+++ linuxsampler/trunk/src/common/RTMath.cpp	2004/12/25 21:58:58	328
@@ -25,6 +25,46 @@
 float  RTMathBase::CentsToFreqTable[MAX_PITCH * 1200 * 2 + 1]; // +-1200 cents per octave
 float* RTMathBase::pCentsToFreqTable(InitCentsToFreqTable());
 
+/*
+ * Creates a real time stamp for the current moment. Out of efficiency this
+ * is implemented in inline assembly for each CPU independently; we currently
+ * don't use a generic solution for CPUs that are not yet covered by the
+ * assembly code, instead an error message is prompted on compile time, forcing
+ * the user to contact us.
+ */
+RTMathBase::time_stamp_t RTMathBase::CreateTimeStamp() {
+    #if defined(__i386__) || defined(__x86_64__)
+    uint64_t t;
+    __asm__ __volatile__ ("rdtsc" : "=A" (t));
+    return t >> 8;
+    #elif defined(__ia64__)
+    time_stamp_t t;
+    __asm__ __volatile__ ("mov %0=ar.itc" : "=r"(t));
+    return t;
+    #elif defined(__powerpc__)
+    time_stamp_t t;
+    __asm__ __volatile__ (
+        "98:	mftb %0\n"
+        "99:\n"
+        ".section __ftr_fixup,\"a\"\n"
+        "	.long %1\n"
+        "	.long 0\n"
+        "	.long 98b\n"
+        "	.long 99b\n"
+        ".previous"
+        : "=r" (t) : "i" (0x00000100)
+    );
+    return t;
+    #elif defined(__alpha__)
+    time_stamp_t t;
+    __asm__ __volatile__ ("rpcc %0" : "=r"(t));
+    return t;
+    #else // we don't want to use a slow generic solution
+    #  error "Sorry, LinuxSampler lacks time stamp code for your system."
+    #  error "Please report this error and the CPU you are using to the LinuxSampler developers mailing list!"
+    #endif
+}
+
 /**
  * Will automatically be called once to initialize the 'Cents to frequency
  * ratio' table.