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-rwxr-xr-xengine/multiply_divide.asm143
1 files changed, 0 insertions, 143 deletions
diff --git a/engine/multiply_divide.asm b/engine/multiply_divide.asm
deleted file mode 100755
index 6cdc6c87..00000000
--- a/engine/multiply_divide.asm
+++ /dev/null
@@ -1,143 +0,0 @@
-_Multiply::
- ld a, $8
- ld b, a
- xor a
- ld [H_PRODUCT], a
- ld [H_MULTIPLYBUFFER], a
- ld [H_MULTIPLYBUFFER+1], a
- ld [H_MULTIPLYBUFFER+2], a
- ld [H_MULTIPLYBUFFER+3], a
-.loop
- ld a, [H_MULTIPLIER]
- srl a
- ld [H_MULTIPLIER], a ; (aliases: H_DIVISOR, H_MULTIPLIER, H_POWEROFTEN)
- jr nc, .smallMultiplier
- ld a, [H_MULTIPLYBUFFER+3]
- ld c, a
- ld a, [H_MULTIPLICAND+2]
- add c
- ld [H_MULTIPLYBUFFER+3], a
- ld a, [H_MULTIPLYBUFFER+2]
- ld c, a
- ld a, [H_MULTIPLICAND+1]
- adc c
- ld [H_MULTIPLYBUFFER+2], a
- ld a, [H_MULTIPLYBUFFER+1]
- ld c, a
- ld a, [H_MULTIPLICAND] ; (aliases: H_MULTIPLICAND)
- adc c
- ld [H_MULTIPLYBUFFER+1], a
- ld a, [H_MULTIPLYBUFFER]
- ld c, a
- ld a, [H_PRODUCT] ; (aliases: H_PRODUCT, H_PASTLEADINGZEROES, H_QUOTIENT)
- adc c
- ld [H_MULTIPLYBUFFER], a
-.smallMultiplier
- dec b
- jr z, .done
- ld a, [H_MULTIPLICAND+2]
- sla a
- ld [H_MULTIPLICAND+2], a
- ld a, [H_MULTIPLICAND+1]
- rl a
- ld [H_MULTIPLICAND+1], a
- ld a, [H_MULTIPLICAND]
- rl a
- ld [H_MULTIPLICAND], a
- ld a, [H_PRODUCT]
- rl a
- ld [H_PRODUCT], a
- jr .loop
-.done
- ld a, [H_MULTIPLYBUFFER+3]
- ld [H_PRODUCT+3], a
- ld a, [H_MULTIPLYBUFFER+2]
- ld [H_PRODUCT+2], a
- ld a, [H_MULTIPLYBUFFER+1]
- ld [H_PRODUCT+1], a
- ld a, [H_MULTIPLYBUFFER]
- ld [H_PRODUCT], a
- ret
-
-_Divide::
- xor a
- ld [H_DIVIDEBUFFER], a
- ld [H_DIVIDEBUFFER+1], a
- ld [H_DIVIDEBUFFER+2], a
- ld [H_DIVIDEBUFFER+3], a
- ld [H_DIVIDEBUFFER+4], a
- ld a, $9
- ld e, a
-.asm_37db3
- ld a, [H_DIVIDEBUFFER]
- ld c, a
- ld a, [H_DIVIDEND+1] ; (aliases: H_MULTIPLICAND)
- sub c
- ld d, a
- ld a, [H_DIVISOR] ; (aliases: H_DIVISOR, H_MULTIPLIER, H_POWEROFTEN)
- ld c, a
- ld a, [H_DIVIDEND] ; (aliases: H_PRODUCT, H_PASTLEADINGZEROES, H_QUOTIENT)
- sbc c
- jr c, .asm_37dce
- ld [H_DIVIDEND], a ; (aliases: H_PRODUCT, H_PASTLEADINGZEROES, H_QUOTIENT)
- ld a, d
- ld [H_DIVIDEND+1], a ; (aliases: H_MULTIPLICAND)
- ld a, [H_DIVIDEBUFFER+4]
- inc a
- ld [H_DIVIDEBUFFER+4], a
- jr .asm_37db3
-.asm_37dce
- ld a, b
- cp $1
- jr z, .asm_37e18
- ld a, [H_DIVIDEBUFFER+4]
- sla a
- ld [H_DIVIDEBUFFER+4], a
- ld a, [H_DIVIDEBUFFER+3]
- rl a
- ld [H_DIVIDEBUFFER+3], a
- ld a, [H_DIVIDEBUFFER+2]
- rl a
- ld [H_DIVIDEBUFFER+2], a
- ld a, [H_DIVIDEBUFFER+1]
- rl a
- ld [H_DIVIDEBUFFER+1], a
- dec e
- jr nz, .asm_37e04
- ld a, $8
- ld e, a
- ld a, [H_DIVIDEBUFFER]
- ld [H_DIVISOR], a ; (aliases: H_DIVISOR, H_MULTIPLIER, H_POWEROFTEN)
- xor a
- ld [H_DIVIDEBUFFER], a
- ld a, [H_DIVIDEND+1] ; (aliases: H_MULTIPLICAND)
- ld [H_DIVIDEND], a ; (aliases: H_PRODUCT, H_PASTLEADINGZEROES, H_QUOTIENT)
- ld a, [H_DIVIDEND+2]
- ld [H_DIVIDEND+1], a ; (aliases: H_MULTIPLICAND)
- ld a, [H_DIVIDEND+3]
- ld [H_DIVIDEND+2], a
-.asm_37e04
- ld a, e
- cp $1
- jr nz, .asm_37e0a
- dec b
-.asm_37e0a
- ld a, [H_DIVISOR] ; (aliases: H_DIVISOR, H_MULTIPLIER, H_POWEROFTEN)
- srl a
- ld [H_DIVISOR], a ; (aliases: H_DIVISOR, H_MULTIPLIER, H_POWEROFTEN)
- ld a, [H_DIVIDEBUFFER]
- rr a
- ld [H_DIVIDEBUFFER], a
- jr .asm_37db3
-.asm_37e18
- ld a, [H_DIVIDEND+1] ; (aliases: H_MULTIPLICAND)
- ld [H_REMAINDER], a ; (aliases: H_DIVISOR, H_MULTIPLIER, H_POWEROFTEN)
- ld a, [H_DIVIDEBUFFER+4]
- ld [H_QUOTIENT+3], a
- ld a, [H_DIVIDEBUFFER+3]
- ld [H_QUOTIENT+2], a
- ld a, [H_DIVIDEBUFFER+2]
- ld [H_QUOTIENT+1], a ; (aliases: H_MULTIPLICAND)
- ld a, [H_DIVIDEBUFFER+1]
- ld [H_DIVIDEND], a ; (aliases: H_PRODUCT, H_PASTLEADINGZEROES, H_QUOTIENT)
- ret