00089748 - 000897d8

unused and unfinished. never resolves.
if 0x87 = 2
00089748: 00802821 addu r5,r4,r0			r5 = misc unit data pointer
0008974c: 8ca6008c lw r6,0x008c(r5)			distortion variable
00089750: 8ca30088 lw r3,0x0088(r5)			distortion phase
00089754: 8ca40090 lw r4,0x0090(r5)			altered height mod
00089758: 10600005 beq r3,r0,0x00089770		branch if phase is initialisation
0008975c: 34020001 ori r2,r0,0x0001
00089760: 1062000b beq r3,r2,0x00089790		branch if phase is executing
00089764: 00000000 nop
00089768: 080225f5 j 0x000897d4			do nothing otherwise.
0008976c: aca6008c sw r6,0x008c(r5)			restore 0x8c into itself.

Initialising
00089770: 3c03fffd lui r3,0xfffd
00089774: 3463c000 ori r3,r3,0xc000			r3 = 0xfffdc000 ( ~= 0x1/0x1)
00089778: 0066001a div r3,r6
0008977c: 00003012 mflo r6				0x1 / (0x1 * var.)
00089780: 8ca4001c lw r4,0x001c(r5)			height mod of unit * 0x1000
00089784: 34020001 ori r2,r0,0x0001
00089788: aca20088 sw r2,0x0088(r5)			store phase as initialised
0008978c: 00832021 addu r4,r4,r3			(height - 0x24) * 0x1000

Executing & Initialising return
00089790: 8ca3001c lw r3,0x001c(r5)			height mod * 0x1000
00089794: 00000000 nop
00089798: 0083102a slt r2,r4,r3			true if height - 0x24 < height
0008979c: 10400003 beq r2,r0,0x000897ac		branch if height - 0x24 > height (error check?)
000897a0: 00c31021 addu r2,r6,r3			r2 = height mod * 0x1000 + 0x1 / (0x1 * var.)
000897a4: 080225ed j 0x000897b4
000897a8: aca2001c sw r2,0x001c(r5)			store new height mod

Error handling (probably ignorable)
000897ac: aca4001c sw r4,0x001c(r5)			store (height - 0x24) * 0x1000 as height mod if error occurs and this value is larger than height * 0x1000
000897b0: a0a00087 sb r0,0x0087(r5)			clear distortion anim ID

000897b4: 8ca2001c lw r2,0x001c(r5)			load height mod
000897b8: 00000000 nop
000897bc: 04410002 bgez r2,0x000897c8			branch if greater than 0
000897c0: 00000000 nop
000897c4: 24420fff addiu r2,r2,0x0fff			rounds properly if negative
000897c8: 00021303 sra r2,r2,0x0c			divide by 0x1000
000897cc: a4a20042 sh r2,0x0042(r5)			store as height
000897d0: aca6008c sw r6,0x008c(r5)			store 0x1 / (0x1 * var) for reiteration
000897d4: 03e00008 jr r31
000897d8: aca40090 sw r4,0x0090(r5)			store height mod here for reiteration. this routine doesn't seem to actually do anything functional.