simple profiler added

[libpicofe.git] / linux / pprof.h

diff --git a/linux/pprof.h b/linux/pprof.h
new file mode 100644 (file)
index 0000000..88a97e3
--- /dev/null
+++ b/linux/pprof.h
@@ -0,0 +1,54 @@
+#ifndef __PPROF_H__
+#define __PPROF_H__
+
+enum pprof_points {
+  pp_main,
+  pp_frame,
+  pp_draw,
+  pp_sound,
+  pp_m68k,
+  pp_z80,
+  pp_msh2,
+  pp_ssh2,
+  pp_dummy,
+  pp_total_points
+};
+
+struct pp_counters
+{
+       unsigned long long counter[pp_total_points];
+};
+
+extern struct pp_counters *pp_counters;
+
+#ifdef __i386__
+static __attribute__((always_inline)) inline unsigned int pprof_get_one(void)
+{
+  unsigned long long ret;
+  __asm__ __volatile__ ("rdtsc" : "=A" (ret));
+  return (unsigned int)ret;
+}
+
+#elif defined(__GP2X__)
+// XXX: MMSP2 only
+extern volatile unsigned long *gp2x_memregl;
+#define pprof_get_one() (unsigned int)gp2x_memregl[0x0a00 >> 2]
+
+#else
+#error no timer
+#endif
+
+#define pprof_start(point) { \
+    unsigned int pp_start_##point = pprof_get_one()
+#define pprof_end(point) \
+    pp_counters->counter[pp_##point] += pprof_get_one() - pp_start_##point; \
+  }
+// subtract for recursive stuff
+#define pprof_end_sub(point) \
+    pp_counters->counter[pp_##point] -= pprof_get_one() - pp_start_##point; \
+  }
+
+extern void pprof_init(void);
+extern void pprof_finish(void);
+
+#endif // __PPROF_H__