Reaction check

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Reaction check
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r4 = unit data
Returns r2
    r2 = 0x00 if target 0x019a = 0x00 (Target current action reaction ID) -  When an ability proc r2 is = 0x00
    r2 = 0x01 if current ability reaction ID <> 0x00 ( 0x801938c6 ) AND 0x801938c8 = 0x00 (current ability post action flag ?)
    r2 = 0x02 if target 0x019a <> 0x00 (Target current action reaction ID)
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0018c9a0: 3c028019 lui r2,0x8019            |
0018c9a4: 944238c6 lhu r2,0x38c6(r2)        |r2 = current ability reaction ID 
0018c9a8: 00000000 nop                      |
0018c9ac: 10400006 beq r2,r0,0x0018c9c8     #If Current ability reaction ID <> 0x00  0x801938c6 <> 0 
0018c9b0: 00000000 nop                           |
0018c9b4: 3c028019 lui r2,0x8019                 |
0018c9b8: 944238c8 lhu r2,0x38c8(r2)             |r2 = ? Flag (pos action ?)  0x801938c8
0018c9bc: 00000000 nop                           |
0018c9c0: 10400006 beq r2,r0,0x0018c9dc          #If post action flag is <> 0x00 /Else branch to end (r2 = 0x01)
0018c9c4: 34020001 ori r2,r0,0x0001              |r2 = 0x01
0018c9c8: 8482019a lh r2,0x019a(r4)         #        |r2 = target current data reaction ID
0018c9cc: 00000000 nop                               |
0018c9d0: 10400002 beq r2,r0,0x0018c9dc              #If Unit's reaction ID <> 0x00 /Else branch to end (r2 = 0x00)
0018c9d4: 00000000 nop                                   |
0018c9d8: 34020002 ori r2,r0,0x0002                      |r2 = 0x02 (if self reaction ? / Guard reaction ?)
0018c9dc: 03e00008 jr r31                        
0018c9e0: 00000000 nop    

Return locations

0018c944: Check_if_unit_can_react_1
0018ca1c: 'Reflect',_Blade_Grasp,_and_Arrow_Guard