Change macro here

wip-hugo/macros/16aritmatic.s

@@ -7,64 +7,82 @@
 ;;Se below for some fast 16bit logic
 ;;http://6502.org/tutorials/compare_beyond.html
 
-;; Addition uses the A register
+;; Addition always uses the A register
 ;; a = a + b
 .macro Add_16 a_low, a_hi, b_low, b_hi, fast_unsafe
 ;; IF to run it fast
 .ifblank fast_unsafe
     CLC
 .endif
+.if .not .match ({b_low}, a)
 	LDA b_low
+.endif ;;untested
 	ADC a_low
 	STA a_low
-	LDA b_hi
+.if .match ({b_hi}, x) ;;Untested
-	ADC a_hi
-	STA a_hi
-.endmacro
-
-;; Untested!
-;; Addition uses the A register
-;; a = a + b. b_low = A, b_hi = X
-.macro Add_16_AX low, hi, fast_unsafe
-;; IF to run it fast
-.ifblank fast_unsafe
-    CLC
-.endif
-	ADC low
-	STA low
         TXA
-	ADC hi
+.else
-	STA hi
-.endmacro
-
-.macro Add_16_A a_low, a_hi, b_low, b_hi, fast_unsafe
-;; IF to run it fast
-.ifblank fast_unsafe
-    CLC
-.endif
-	LDA a_low
-	ADC b_low
-	STA a_low
 	LDA b_hi
+.endif
 	ADC a_hi
 	STA a_hi
 .endmacro
 
-;; Subtraction uses the A register
+
+;; Subtraction uses always uses A register
 ;; a = a - b
 .macro Sub_16 a_low, a_hi, b_low, b_hi, fast_unsafe
 ;; IF to run it fast
 .ifblank fast_unsafe
         SEC
 .endif
+;; if b_low = A and b_hi =A
+.if .match({b_low}, a) .and .match({b_hi}, a) ;;untested
+        .LOCAL rewrite
+        .LOCAL rewrite2
+        STA rewrite +1
+        STA rewrite2 + 1
+        LDA a_low
+        rewrite:
+        SBC #b_low
+        STA a_low
+        LDA a_hi
+        rewrite2:
+        SBC #b_hi
+        STA a_hi
+;; if b_low = A
+.elseif .match({b_low}, a) ;;untested
+        .LOCAL rewrite
+        STA rewrite +1
+        LDA a_low
+        rewrite:
+        SBC #b_low
+        STA a_low
+        LDA a_hi
+        SBC b_hi
+        STA a_hi
+.elseif .match({b_hi}, a) ;;untested
+        .LOCAL rewrite
+        STA rewrite +1
+        LDA a_low
+        SBC b_low
+        STA a_low
+        LDA a_hi
+        rewrite:
+        SBC #b_hi
+        STA a_hi
+.else
         LDA a_low
         SBC b_low
         STA a_low
         LDA a_hi
         SBC b_hi
         STA a_hi
+.endif
 .endmacro
 
+;; Subtraction uses always uses A register
+;; a = (A, a_hi) - b
 .macro Sub_16_A a_low, a_hi, b_low, b_hi, fast_unsafe
 ;; IF to run it fast
 .ifblank fast_unsafe
@@ -77,20 +95,6 @@
         STA a_hi
 .endmacro
 
-;; Untested
-;; Subtraction uses the A register
-;; a = a - b. b_low = A, b_hi = X
-.macro Sub_16_AX low, hi, fast_unsafe
-;; IF to run it fast
-.ifblank fast_unsafe
-    SEC
-.endif
-	SBC low
-	STA low
-	TXA
-	SBC hi
-	STA hi
-.endmacro
 
 ;; Multiplication of 2
 ;; a = a*2
@@ -112,29 +116,25 @@
         STA a_hi
 .endmacro
 
+;;http://www.6502.org/tutorials/compare_beyond.html
 ;;Larger then operation, uses the A register
 ;;IF a < b then: jump to label
 ; C =0 if jump to LABEL
 .macro Lag_16 a_low, a_hi, b_low, b_hi, label
+        .LOCAL LABEL
         LDA a_hi
         CMP b_hi
         BCC label
         BNE LABEL
         LDA a_low
-        CMP b_low
+.if .match ({b_low}, a)
-        BCC label
+        .LOCAL next
-        LABEL:
-.endmacro
-
-.macro Lag_16y a_low, a_hi, b_hi, label
-        LDA a_hi
-        CMP b_hi
-        BCC label
-        BNE LABEL
-        LDA a_low
         STY next +1
 next:
         CMP #$ff
+.else
+        CMP b_low
+.endif
         BCC label
         LABEL:
 .endmacro

wip-hugo/routines/memory/memcpy.s

@@ -18,9 +18,7 @@
         LDA #$00
         STA >B_start
 loop:
-        ;Lag_16 >B_end, <B_end, >B_start, <B_start, end_loop
+        Lag_16 >B_end, <B_end, A, <B_start, end_loop
-        Lag_16y >B_end, <B_end, <B_start, end_loop
-        ;Lag_16y <B_start, >B_end, <B_end, end_loop ; IF B_end >B_start stop the loop
         LDA (>B_start), Y
         STA (>A_start), Y
         ;Tip save time by counting downward, fast to check if Y ==0 // hugo

wip-hugo/routines/memory/memcpy_test.s

@@ -0,0 +1,31 @@
+;;; -*- Mode: asm; indent-tabs-mode: t; tab-width: 8 -*-
+memcpy_test:
+        ;; TESTING OF MEMCPY TEMPERARLY HERE BECAUSE IT WILL USE THAT :)
+        X_pos = $FA
+        A_start = $FAFB
+        Y_pos = $F9
+        B_start = $FCFD
+        charset = $FB
+        B_end = $FEFF
+        code = $FE
+        petski_position = $FEFF ;reuses code:s memory
+        screen_position = $FCFD
+
+
+        Mov_16 >B_start, <B_start, #<$D000, #>$D000
+        ;#### TEMP INIT DATA ####
+        Mov_16 >B_end, <B_end,  #<($D000+$1F3F), #>($D000 +$1F3F)
+        LDA #$10
+        STA code
+        LDA #$10
+        STA X_pos
+        STA Y_pos
+
+
+        Mov_16 >A_start, <A_start, #<VIC_bank, #>VIC_bank
+        ;We first need to clear some memory
+        ;Mov_16 >A_end, >A_end,  #<(VIC_bank+100),  #>(VIC_bank +100)
+        LDA #$00
+        JSR memcpy
+        STA <petski_position
+        jmp exit