Organize the engine/ directory, director's cut

Cleaned up `engine/routines`, in favor of moving files into more
appropriate directories. predef-related routines are now in top-level
`engine`.
`rtc/delete_save_change_clock.asm` has been split into both
`menus/delete_save.asm` and `rtc/reset_password.asm`.

Made a new subdirectory:
* engine/math: Contains all generic math-related routines.

1 files changed, 0 insertions, 196 deletions

diff --git a/engine/routines/math.asm b/engine/routines/math.asm
deleted file mode 100755
index 0cd6b0b47..000000000
--- a/engine/routines/math.asm
+++ /dev/null
@@ -1,196 +0,0 @@
-_Multiply:: ; 66de
-
-; hMultiplier is one byte.
-	ld a, 8
-	ld b, a
-
-	xor a
-	ld [hProduct], a
-	ld [hMathBuffer + 1], a
-	ld [hMathBuffer + 2], a
-	ld [hMathBuffer + 3], a
-	ld [hMathBuffer + 4], a
-
-
-.loop
-	ld a, [hMultiplier]
-	srl a
-	ld [hMultiplier], a
-	jr nc, .next
-
-	ld a, [hMathBuffer + 4]
-	ld c, a
-	ld a, [hMultiplicand + 2]
-	add c
-	ld [hMathBuffer + 4], a
-
-	ld a, [hMathBuffer + 3]
-	ld c, a
-	ld a, [hMultiplicand + 1]
-	adc c
-	ld [hMathBuffer + 3], a
-
-	ld a, [hMathBuffer + 2]
-	ld c, a
-	ld a, [hMultiplicand + 0]
-	adc c
-	ld [hMathBuffer + 2], a
-
-	ld a, [hMathBuffer + 1]
-	ld c, a
-	ld a, [hProduct]
-	adc c
-	ld [hMathBuffer + 1], a
-
-.next
-	dec b
-	jr z, .done
-
-
-; hMultiplicand <<= 1
-
-	ld a, [hMultiplicand + 2]
-	add a
-	ld [hMultiplicand + 2], a
-
-	ld a, [hMultiplicand + 1]
-	rla
-	ld [hMultiplicand + 1], a
-
-	ld a, [hMultiplicand + 0]
-	rla
-	ld [hMultiplicand + 0], a
-
-	ld a, [hProduct]
-	rla
-	ld [hProduct], a
-
-	jr .loop
-
-
-.done
-	ld a, [hMathBuffer + 4]
-	ld [hProduct + 3], a
-
-	ld a, [hMathBuffer + 3]
-	ld [hProduct + 2], a
-
-	ld a, [hMathBuffer + 2]
-	ld [hProduct + 1], a
-
-	ld a, [hMathBuffer + 1]
-	ld [hProduct + 0], a
-
-	ret
-; 673e
-
-
-_Divide:: ; 673e
-	xor a
-	ld [hMathBuffer + 0], a
-	ld [hMathBuffer + 1], a
-	ld [hMathBuffer + 2], a
-	ld [hMathBuffer + 3], a
-	ld [hMathBuffer + 4], a
-
-	ld a, 9
-	ld e, a
-
-.loop
-	ld a, [hMathBuffer + 0]
-	ld c, a
-	ld a, [hDividend + 1]
-	sub c
-	ld d, a
-
-	ld a, [hDivisor]
-	ld c, a
-	ld a, [hDividend + 0]
-	sbc c
-	jr c, .next
-
-	ld [hDividend + 0], a
-
-	ld a, d
-	ld [hDividend + 1], a
-
-	ld a, [hMathBuffer + 4]
-	inc a
-	ld [hMathBuffer + 4], a
-
-	jr .loop
-
-.next
-	ld a, b
-	cp 1
-	jr z, .done
-
-	ld a, [hMathBuffer + 4]
-	add a
-	ld [hMathBuffer + 4], a
-
-	ld a, [hMathBuffer + 3]
-	rla
-	ld [hMathBuffer + 3], a
-
-	ld a, [hMathBuffer + 2]
-	rla
-	ld [hMathBuffer + 2], a
-
-	ld a, [hMathBuffer + 1]
-	rla
-	ld [hMathBuffer + 1], a
-
-	dec e
-	jr nz, .next2
-
-	ld e, 8
-	ld a, [hMathBuffer + 0]
-	ld [hDivisor], a
-	xor a
-	ld [hMathBuffer + 0], a
-
-	ld a, [hDividend + 1]
-	ld [hDividend + 0], a
-
-	ld a, [hDividend + 2]
-	ld [hDividend + 1], a
-
-	ld a, [hDividend + 3]
-	ld [hDividend + 2], a
-
-.next2
-	ld a, e
-	cp 1
-	jr nz, .okay
-	dec b
-
-.okay
-	ld a, [hDivisor]
-	srl a
-	ld [hDivisor], a
-
-	ld a, [hMathBuffer + 0]
-	rr a
-	ld [hMathBuffer + 0], a
-
-	jr .loop
-
-.done
-	ld a, [hDividend + 1]
-	ld [hDivisor], a
-
-	ld a, [hMathBuffer + 4]
-	ld [hDividend + 3], a
-
-	ld a, [hMathBuffer + 3]
-	ld [hDividend + 2], a
-
-	ld a, [hMathBuffer + 2]
-	ld [hDividend + 1], a
-
-	ld a, [hMathBuffer + 1]
-	ld [hDividend + 0], a
-
-	ret
-; 67c1