first commit

1 files changed, 202 insertions, 0 deletions

diff --git a/asm/math_util.s b/asm/math_util.s
new file mode 100644
index 000000000..fc245ab7f
--- /dev/null
+++ b/asm/math_util.s
@@ -0,0 +1,202 @@
+	.include "asm/macros.inc"
+	.include "constants/constants.inc"
+
+	.syntax unified
+
+	.text
+
+	thumb_func_start sub_80D8AA0
+sub_80D8AA0: @ 80D8AA0
+	push {lr}
+	lsls r0, 16
+	asrs r0, 16
+	lsls r1, 16
+	asrs r1, 16
+	muls r0, r1
+	adds r1, r0, 0
+	cmp r0, 0
+	bge _080D8AB4
+	adds r1, 0xFF
+_080D8AB4:
+	lsls r0, r1, 8
+	asrs r0, 16
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8AA0
+
+	thumb_func_start sub_80D8ABC
+sub_80D8ABC: @ 80D8ABC
+	push {lr}
+	adds r3, r1, 0
+	lsls r0, 24
+	lsrs r0, 24
+	lsls r3, 16
+	asrs r3, 16
+	lsls r2, 16
+	asrs r2, 16
+	muls r3, r2
+	movs r1, 0x1
+	lsls r1, r0
+	adds r0, r3, 0
+	bl __divsi3
+	lsls r0, 16
+	asrs r0, 16
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8ABC
+
+	thumb_func_start sub_80D8AE0
+sub_80D8AE0: @ 80D8AE0
+	push {r4-r7,lr}
+	adds r2, r1, 0
+	adds r4, r0, 0
+	asrs r5, r0, 31
+	asrs r3, r2, 31
+	adds r1, r5, 0
+	adds r0, r4, 0
+	bl __muldi3
+	adds r5, r1, 0
+	adds r4, r0, 0
+	adds r7, r5, 0
+	adds r6, r4, 0
+	cmp r5, 0
+	bge _080D8B06
+	movs r6, 0xFF
+	movs r7, 0
+	adds r6, r4
+	adcs r7, r5
+_080D8B06:
+	lsls r3, r7, 24
+	lsrs r2, r6, 8
+	adds r0, r3, 0
+	orrs r0, r2
+	asrs r1, r7, 8
+	adds r5, r1, 0
+	adds r4, r0, 0
+	adds r0, r4, 0
+	pop {r4-r7}
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8AE0
+
+	thumb_func_start sub_80D8B1C
+sub_80D8B1C: @ 80D8B1C
+	push {lr}
+	lsls r0, 16
+	lsrs r0, 16
+	lsls r1, 16
+	asrs r1, 16
+	cmp r1, 0
+	beq _080D8B38
+	lsls r0, 16
+	asrs r0, 8
+	bl __divsi3
+	lsls r0, 16
+	asrs r0, 16
+	b _080D8B3A
+_080D8B38:
+	movs r0, 0
+_080D8B3A:
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8B1C
+
+	thumb_func_start sub_80D8B40
+sub_80D8B40: @ 80D8B40
+	push {lr}
+	lsls r0, 24
+	lsrs r3, r0, 24
+	lsls r1, 16
+	lsrs r0, r1, 16
+	lsls r2, 16
+	asrs r1, r2, 16
+	cmp r1, 0
+	beq _080D8B62
+	lsls r0, 16
+	asrs r0, 16
+	lsls r0, r3
+	bl __divsi3
+	lsls r0, 16
+	asrs r0, 16
+	b _080D8B64
+_080D8B62:
+	movs r0, 0
+_080D8B64:
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8B40
+
+	thumb_func_start sub_80D8B68
+sub_80D8B68: @ 80D8B68
+	push {r4-r6,lr}
+	adds r6, r1, 0
+	cmp r6, 0
+	beq _080D8B88
+	adds r2, r0, 0
+	asrs r3, r0, 31
+	lsrs r5, r2, 24
+	lsls r4, r3, 8
+	adds r1, r5, 0
+	orrs r1, r4
+	lsls r0, r2, 8
+	adds r2, r6, 0
+	asrs r3, r6, 31
+	bl __divdi3
+	b _080D8B8A
+_080D8B88:
+	movs r0, 0
+_080D8B8A:
+	pop {r4-r6}
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8B68
+
+	thumb_func_start sub_80D8B90
+sub_80D8B90: @ 80D8B90
+	push {lr}
+	adds r1, r0, 0
+	movs r0, 0x80
+	lsls r0, 9
+	lsls r1, 16
+	asrs r1, 16
+	bl __divsi3
+	lsls r0, 16
+	asrs r0, 16
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8B90
+
+	thumb_func_start sub_80D8BA8
+sub_80D8BA8: @ 80D8BA8
+	push {lr}
+	lsls r0, 24
+	lsrs r0, 24
+	movs r2, 0x80
+	lsls r2, 1
+	lsls r2, r0
+	lsls r1, 16
+	asrs r1, 16
+	adds r0, r2, 0
+	bl __divsi3
+	lsls r0, 16
+	asrs r0, 16
+	pop {r1}
+	bx r1
+	thumb_func_end sub_80D8BA8
+
+	thumb_func_start sub_80D8BC8
+sub_80D8BC8: @ 80D8BC8
+	push {lr}
+	adds r2, r0, 0
+	ldr r1, _080D8BE0 @ =0x00000000
+	ldr r0, _080D8BDC @ =0x00010000
+	asrs r3, r2, 31
+	bl __divdi3
+	pop {r1}
+	bx r1
+	.align 2, 0
+_080D8BDC: .4byte 0x00010000
+_080D8BE0: .4byte 0x00000000
+	thumb_func_end sub_80D8BC8
+
+	.align 2, 0 @ Don't pad with nop.