Add instr/s counter

2 files changed, 22 insertions, 3 deletions

diff --git a/test/e2e/fibo/fibo.atk16 b/test/e2e/fibo/fibo.atk16
index fe38fe5..2cf3d20 100644
--- a/test/e2e/fibo/fibo.atk16
+++ b/test/e2e/fibo/fibo.atk16
@@ -2,9 +2,13 @@
 ; will jump to label main
 @include bootstrap
 
+@label iters
+  51
+
 @label main
-  ldi 10 RA
-  calli fibo                   ; call fibo subroutine with parameter 10
+  ldi iters RA
+  ldr RA RA
+  calli fibo                  ; call fibo subroutine with parameter 1000
   hlt
 
 @label fibo                   ; fibo(n) subroutine
diff --git a/test/e2e/fibo/test_fibo.py b/test/e2e/fibo/test_fibo.py
index a7146fc..65af07a 100644
--- a/test/e2e/fibo/test_fibo.py
+++ b/test/e2e/fibo/test_fibo.py
@@ -1,3 +1,4 @@
+import time
 from atk16_asm import assemble
 from atk16_emu import Machine
 from test.utils import pad_bytearray
@@ -13,7 +14,21 @@ def test_fibo():
   machine = Machine()
   machine.load_rom_image(rom_image)
   machine.reset()
+  start = time.perf_counter_ns()
   machine.run_until_halted()
+  end = time.perf_counter_ns()
   machine.print_state_summary()
 
-  assert machine.ra.value == 89
+  elapsed = end - start
+  print("Elapsed time:", elapsed, "ns")
+  steps_taken = machine.steps_taken
+
+  # VGA frequency is 25.175 MHz
+  # Divided by 16, that's 1.5734375 MHz (main clock)
+  # Instructions take 3–5 cycles, the average instruction takes around 4 cycles
+  # 1.5734375 MHz / 4 = 393359.375 Hz
+  # That is the goal instruction frequency
+  # TODO limit emulation speed to 393359.375 Hz
+  print("Instructions / second:", steps_taken / (elapsed / 1e9))
+
+  assert machine.ra.value == 41443