From 55e63ff6270ef37d803a7392a76ab27dc7241344 Mon Sep 17 00:00:00 2001
From: hugova <hugova@kth.se>
Date: Mon, 12 May 2025 02:24:55 +0200
Subject: [PATCH] optimise away constant by adding it to lookup-table

---
 wip-hugo/END.s                       | 101 ++++++++++++++-------------
 wip-hugo/routines/pixel/pixel_draw.s |   4 +-
 2 files changed, 53 insertions(+), 52 deletions(-)

diff --git a/wip-hugo/END.s b/wip-hugo/END.s
index 9a6c97a..df88390 100644
--- a/wip-hugo/END.s
+++ b/wip-hugo/END.s
@@ -1,55 +1,56 @@
 binary_factor:
 .byte   %00000001, %00000010, %00000100, %00001000, %00010000, %00100000, %01000000, %10000000
 
+Bitmap = $4000
 ;;This is used by pixel_draw! look at it for more detail
 big_y_offset:
-        .lobytes $0000
-        .hibytes $0000
-        .lobytes $0140
-        .hibytes $0140
-        .lobytes $0280
-        .hibytes $0280
-        .lobytes $03C0
-        .hibytes $03C0
-        .lobytes $0500
-        .hibytes $0500
-        .lobytes $0640
-        .hibytes $0640
-        .lobytes $0780
-        .hibytes $0780
-        .lobytes $08C0
-        .hibytes $08C0
-        .lobytes $0A00
-        .hibytes $0A00
-        .lobytes $0B40
-        .hibytes $0B40
-        .lobytes $0C80
-        .hibytes $0C80
-        .lobytes $0DC0
-        .hibytes $0DC0
-        .lobytes $0F00
-        .hibytes $0F00
-        .lobytes $1040
-        .hibytes $1040
-        .lobytes $1180
-        .hibytes $1180
-        .lobytes $12C0
-        .hibytes $12C0
-        .lobytes $1400
-        .hibytes $1400
-        .lobytes $1540
-        .hibytes $1540
-        .lobytes $1680
-        .hibytes $1680
-        .lobytes $17C0
-        .hibytes $17C0
-        .lobytes $1900
-        .hibytes $1900
-        .lobytes $1A40
-        .hibytes $1A40
-        .lobytes $1B80
-        .hibytes $1B80
-        .lobytes $1CC0
-        .hibytes $1CC0
-        .lobytes $1E00
-        .hibytes $1E00
+        .lobytes $0000 + Bitmap
+        .hibytes $0000 + Bitmap
+        .lobytes $0140 + Bitmap
+        .hibytes $0140 + Bitmap
+        .lobytes $0280 + Bitmap
+        .hibytes $0280 + Bitmap
+        .lobytes $03C0 + Bitmap
+        .hibytes $03C0 + Bitmap
+        .lobytes $0500 + Bitmap
+        .hibytes $0500 + Bitmap
+        .lobytes $0640 + Bitmap
+        .hibytes $0640 + Bitmap
+        .lobytes $0780 + Bitmap
+        .hibytes $0780 + Bitmap
+        .lobytes $08C0 + Bitmap
+        .hibytes $08C0 + Bitmap
+        .lobytes $0A00 + Bitmap
+        .hibytes $0A00 + Bitmap
+        .lobytes $0B40 + Bitmap
+        .hibytes $0B40 + Bitmap
+        .lobytes $0C80 + Bitmap
+        .hibytes $0C80 + Bitmap
+        .lobytes $0DC0 + Bitmap
+        .hibytes $0DC0 + Bitmap
+        .lobytes $0F00 + Bitmap
+        .hibytes $0F00 + Bitmap
+        .lobytes $1040 + Bitmap
+        .hibytes $1040 + Bitmap
+        .lobytes $1180 + Bitmap
+        .hibytes $1180 + Bitmap
+        .lobytes $12C0 + Bitmap
+        .hibytes $12C0 + Bitmap
+        .lobytes $1400 + Bitmap
+        .hibytes $1400 + Bitmap
+        .lobytes $1540 + Bitmap
+        .hibytes $1540 + Bitmap
+        .lobytes $1680 + Bitmap
+        .hibytes $1680 + Bitmap
+        .lobytes $17C0 + Bitmap
+        .hibytes $17C0 + Bitmap
+        .lobytes $1900 + Bitmap
+        .hibytes $1900 + Bitmap
+        .lobytes $1A40 + Bitmap
+        .hibytes $1A40 + Bitmap
+        .lobytes $1B80 + Bitmap
+        .hibytes $1B80 + Bitmap
+        .lobytes $1CC0 + Bitmap
+        .hibytes $1CC0 + Bitmap
+        .lobytes $1E00 + Bitmap
+        .hibytes $1E00 + Bitmap
diff --git a/wip-hugo/routines/pixel/pixel_draw.s b/wip-hugo/routines/pixel/pixel_draw.s
index 1c06e0e..fb3c7db 100755
--- a/wip-hugo/routines/pixel/pixel_draw.s
+++ b/wip-hugo/routines/pixel/pixel_draw.s
@@ -31,7 +31,7 @@ calc_byte_to_paint:
 	;; the chunks are orderd from the left to the right and then looping downwards.
 	;; Therefore we have that: btp_mem_pos = big_x_offset + smal_y_offset + big_y_offset    + bitmap_offset
 
-	;; We use a lookup-table for big_y_offset (see END.s)
+	;; We use a lookup-table for big_y_offset + bitmap_offset (see END.s)
 	;; (Y_pos / 8  floor)*2
 	LDA Y_pos
 	LSR A
@@ -57,7 +57,7 @@ calc_byte_to_paint:
 	AND Y_pos ;; offset to add
 	TAY
 
-	Add_16 btp_mem_pos, btp_mem_pos + 1, #<Bitmap, #>Bitmap, !
+	;Add_16 btp_mem_pos, btp_mem_pos + 1, #<Bitmap, #>Bitmap, !
 
 	;;Let draw some stuff
 	LDA byte_to_paint ;; note that both bytes are used!