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Implement idle loop skipping. The framerate on SMA4 is NINE times faster this way!

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Alcaro
2014-12-13 22:05:06 +01:00
parent 7e08f8c67b
commit 3c1474e99d
1 changed files with 4 additions and 0 deletions
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4
cpu_orig.c
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@@ -3275,6 +3275,8 @@ skip_instruction:
/* End of Execute ARM instruction */ /* End of Execute ARM instruction */
cycles_remaining -= cycles_per_instruction; cycles_remaining -= cycles_per_instruction;
if (pc == idle_loop_target_pc && cycles_remaining > 0) cycles_remaining = 0;
} while(cycles_remaining > 0); } while(cycles_remaining > 0);
collapse_flags(); collapse_flags();
@@ -4242,6 +4244,8 @@ thumb_loop:
/* End of Execute THUMB instruction */ /* End of Execute THUMB instruction */
cycles_remaining -= cycles_per_instruction; cycles_remaining -= cycles_per_instruction;
if (pc == idle_loop_target_pc && cycles_remaining > 0) cycles_remaining = 0;
} while(cycles_remaining > 0); } while(cycles_remaining > 0);
collapse_flags(); collapse_flags();