back to 2560fps after wrangling the ppu_state into two cachelines

1 files changed, 10 insertions, 7 deletions

diff --git a/mknes.h b/mknes.h
index a9e58a0..f8e4be7 100644
--- a/mknes.h
+++ b/mknes.h
@@ -26,11 +26,11 @@ struct ppu_state {
 	uint16_t bg_shift_attrib_low;
 	uint16_t bg_shift_attrib_high;
 
-	uint32_t scanline;
-	uint32_t dot;
-	uint32_t vram_addr;
-	uint32_t temp_addr;
-	uint32_t fine_x;
+	uint16_t scanline;
+	uint16_t dot;
+	uint16_t vram_addr;
+	uint16_t temp_addr;
+	uint8_t fine_x;
 	uint8_t bg_next_tile_id;
 	uint8_t bg_next_tile_attrib;
 	uint8_t bg_next_tile_lsb;
@@ -49,20 +49,23 @@ struct ppu_state {
 
 	uint8_t open_bus;
 
-	uint8_t frame_ready;
 
 	uint8_t sprite_zero_hit_possible;
 	uint8_t sprite_count;
 
+	uint8_t palette[32];
+
+	// NOTE(peter): CACHELINE 2 start here!
+
 	uint8_t sprite_indexes[8];
 	uint8_t sprite_positions[8];
 	uint8_t sprite_priorities[8];
 	uint8_t sprite_shift_lo[8];
 	uint8_t sprite_shift_hi[8];
-	uint8_t palette[32];
 	uint8_t secondary_oam[32];
 	uint8_t oam[256];
 
+	uint8_t frame_ready;
 } __attribute__((packed, aligned(64)));
 
 struct cpu_state {