FE7 Magic Sword Hextator Disassembly Notes

Rune Sword half strength (display only):

08028520 2811 cmp r0, #0x11 (0x11 = Runesword ID in FE7's ROM)
08028522 d10f bne $08028544
08028524 1c22 add r2, r4, #0x0
08028526 325a add r2, #0x5a
08028528 2014 mov r0, #0x14
0802852a 5620 ldrh r0, [r4, r0]
0802852c 0fc1 lsr r1, r0, #0x1f
0802852e 1840 add r0, r0, r1
08028530 1040 asr r0, r0, #0x01
08028532 8811 ldrh r1, [r2, #0x0]
08028534 1a08 sub r0, r1, r0

Rune Sword null crit (display only):

08028536 2100 mov r1, #0x0
08028538 8010 strh r0, [r2, #0x0]
0802853a 1c20 add r0, r4, #0x0
0802853c 3066 add r0, #0x66
0802853e 8001 strh r1, [r0, #0x0]
08028540 3004 add r0, #0x4
08028542 8001 strh r1, [r0, #0x0]

Some other compare function (seems to do nothing):
(My edit: 0x10 = Light Brand, 0x11 = Runesword, 0x99 = Wind Sword)

080288e6 2811 cmp r0, #0x11
080288e8 d018 beq $0802891c
080288ea 2811 cmp r0, #0x11
080288ec dc04 bgt $080288f8
080288ee 2810 cmp r0, #0x10
080288f0 d009 beq $08028906

080288f8 2899 cmp r0, #0x99
080288fa d111 bne $08028920

Half damage check:

08028f06 2810 cmp r0, #0x10
08028f08 db38 blt $08028f7c
08028f0a 2811 cmp r0, #0x11
08028f0c dd01 ble $08028f12
08028f0e 2899 cmp r0, #0x99
08028f10 d134 bne $08028f7c

Ranged animation at close range check:

08052d58 2811 cmp r0, #0x11
08052d5a d104 bne $08052d66

Legendary weapons have special BGM and white flash:

080533be 2884 cmp r0, #0x84
080533c0 d010 beq $080533e4
080533c2 1c20 add r0, r4, #0x0
080533c4 f7c3 bl $080171b4
080533c8 2885 cmp r0, #0x85
080533ca d00b beq $080533e4
080533cc 1c20 add r0, r4, #0x0
080533ce f7c3 bl $080171b4
080533d2 2886 cmp r0, #0x86
080533d4 d006 beq $080533e4
080533d6 1c28 add r0, r5, #0x0
080533d8 f7c3 bl $080171b4
080533dc 283c cmp r0, #0x3c
080533de d001 beq $080533e4
080533e0 2000 mov r0, #0x0 ;This 0 means no special BGM
080533e2 e000 b $080533e6
080533e4 2001 mov r0, #0x1 ;This 1 means there is a special BGM
080533e6 bc30 pop {r4,r5}
080533e8 bc02 pop {r1}
080533ea 4708 bx r1