Difference between revisions of "Cos call function"

From Final Fantasy Hacktics Wiki
Jump to navigation Jump to search
m (Talcall moved page 0001bc28 - 0001bcc4 to Sin call function: I manually figured out what this was for, that's the reason.)
m (Notes Formatting, return location)
Line 1: Line 1:
−
<font face='Courier New'>
+
Parameters : r4 = angle  value (degrees*1024/90)
 
   
 
   
−
  0001bc28: 04810002 bgez r4,0x0001bc34 branch if input => 0?
+
Returns : r2 = sinus (90-angle)*4096 if angle <= 90°
−
  0001bc2c: 00000000 nop
+
          r2 = -sinus (angle -90)*4096 if angle is between 91° and 180°
−
  0001bc30: 00042023 subu r4,r0,r4 obtain positive
+
          r2 = sinus (angle -270)*4096 if angle is > 270° (0° to -90°)
−
  0001bc34: 30840fff andi r4,r4,0x0fff
+
          r2 = -sinus (270-angle) if angle is between 181° and 270° (-90° to 180°)
−
  0001bc38: 28820801 slti r2,r4,0x0801 r2 = true if r4 <= 0x0800
+
----------------------------------------------------------------------------------------------------------
−
  0001bc3c: 10400010 beq r2,r0,0x0001bc80 $Branch if > 0x800
+
  0001bc28: 04810002 bgez r4,0x0001bc34           {{f/Cond|<nowiki>If input value < 0x00</nowiki>}}
−
  0001bc40: 28820401 slti r2,r4,0x0401 |r2 = true if r4 <= 0x400
+
  0001bc2c: 00000000 nop                               |
−
  0001bc44: 10400008 beq r2,r0,0x0001bc68 #Branch if > 0x400
+
  0001bc30: 00042023 subu r4,r0,r4                     |{{f/std|<nowiki>r4 = input positive value</nowiki>}}
−
  0001bc48: 34020400 ori r2,r0,0x0400 |r2 = 0x400
+
  0001bc34: 30840fff andi r4,r4,0x0fff             |{{f/std|<nowiki>r4 = remainder of r4/4096</nowiki>}} {{f/std|<nowiki>4096 = 360°</nowiki>}}
−
  0001bc4c: 00441023 subu r2,r2,r4 |r2 = 0x400 - r4
+
  0001bc38: 28820801 slti r2,r4,0x0801             |{{f/std|<nowiki>r2 x 0x01 if angle < 0x801</nowiki>}}
−
  0001bc50: 00021040 sll r2,r2,0x01 |r2 * 2
+
  0001bc3c: 10400010 beq r2,r0,0x0001bc80         {{f/Cond|<nowiki>If angle < 0x801 (angle <= 180°)</nowiki>}}
−
  0001bc54: 3c018003 lui r1,0x8003 |
+
  0001bc40: 28820401 slti r2,r4,0x0401                 |{{f/std|<nowiki>r2 = 0x01 if angle <= 0x400</nowiki>}}
−
  0001bc58: 00220821 addu r1,r1,r2 |
+
  0001bc44: 10400008 beq r2,r0,0x0001bc68             {{f/Cond|<nowiki>If angle <= 0x400  (angle <= 90°)</nowiki>}} {{f/Cond|<nowiki>Branch if > 0x400</nowiki>}}
−
  0001bc5c: 8422b0a4 lh r2,-0x4f5c(r1) |sin that shit
+
  0001bc48: 34020400 ori r2,r0,0x0400                     |{{f/std|<nowiki>r2 = 0x400</nowiki>}}
−
  0001bc60: 08006f30 j 0x0001bcc0 |finish function
+
  0001bc4c: 00441023 subu r2,r2,r4                         |{{f/std|<nowiki>r2 = 0x400 -angle (r4/4096)</nowiki>}}
−
  0001bc64: 00000000 nop |
+
  0001bc50: 00021040 sll r2,r2,0x01                       |{{f/std|<nowiki>r2 * 2</nowiki>}}
−
  0001bc68: 00041040 sll r2,r4,0x01 #r2 = r4 * 2
+
  0001bc54: 3c018003 lui r1,0x8003                         |{{f/std|<nowiki>r1 = 0x80030000</nowiki>}}
−
  0001bc6c: 3c018003 lui r1,0x8003 |
+
  0001bc58: 00220821 addu r1,r1,r2                         |{{f/std|<nowiki>r1 = 0x80030000 + offset</nowiki>}}
−
  0001bc70: 00220821 addu r1,r1,r2 |
+
  0001bc5c: 8422b0a4 lh r2,-0x4f5c(r1)                     |{{f/load|<nowiki>r2 = [Sinus(90-r4 angle)]*4096</nowiki>}} {{f/std|<nowiki>0x8002b0a4 + offset</nowiki>}}
−
  0001bc74: 8422a8a4 lh r2,-0x575c(r1) |sin that shit, but in reverse order from that above
+
  0001bc60: 08006f30 j 0x0001bcc0                         {{f/jump|<nowiki>jump to </nowiki>{{f/loc|<nowiki>end</nowiki>}}<nowiki></nowiki>}}
−
  0001bc78: 08006f30 j 0x0001bcc0 |Finish function
+
  0001bc64: 00000000 nop                                   |
−
  0001bc7c: 00021023 subu r2,r0,r2 |obtain negative
+
  0001bc68: 00041040 sll r2,r4,0x01                   {{f/Cond|<nowiki>Else (angle > 400) (>90°)</nowiki>}} {{f/Cond|<nowiki>r2 = angle * 2</nowiki>}}
−
  0001bc80: 28820c01 slti r2,r4,0x0c01 $r2 = true if r4 <= 0x0c00
+
  0001bc6c: 3c018003 lui r1,0x8003                     |{{f/std|<nowiki>r1 = 0x80030000</nowiki>}}
−
  0001bc84: 14400007 bne r2,r0,0x0001bca4 #branch if r4 <= 0x0c00
+
  0001bc70: 00220821 addu r1,r1,r2                     |{{f/std|<nowiki>r1 = 0x80030000 + offset</nowiki>}}
−
  0001bc88: 34020c00 ori r2,r0,0x0c00 |r2 = 0x0c00
+
  0001bc74: 8422a8a4 lh r2,-0x575c(r1)                 |{{f/load|<nowiki>r2 = Sinus (r4 angle-90)*4096</nowiki>}} {{f/std|<nowiki>0x8002a8a4 + offset (ignore the first 90° of the angle - 1st available value starts at 0x8002b0a4  ( 0x8002a8a4 + 0x400*2)</nowiki>}}
−
  0001bc8c: 00041040 sll r2,r4,0x01 |r2 = r4 * 2
+
  0001bc78: 08006f30 j 0x0001bcc0                     {{f/jump|<nowiki>jump to </nowiki>{{f/loc|<nowiki>end</nowiki>}}<nowiki></nowiki>}}
−
  0001bc90: 3c018003 lui r1,0x8003 |
+
  0001bc7c: 00021023 subu r2,r0,r2                     |{{f/std|<nowiki>r2 = - Sinus (r4 angle)*4096</nowiki>}}
−
  0001bc94: 00220821 addu r1,r1,r2 |
+
  0001bc80: 28820c01 slti r2,r4,0x0c01             {{f/Cond|<nowiki>Else (Angle > 180°)</nowiki>}} {{f/std|<nowiki>r2 = 0x01 if angle <= 270°</nowiki>}}
−
  0001bc98: 842298a4 lh r2,-0x675c(r1) |Sin that shit
+
  0001bc84: 14400007 bne r2,r0,0x0001bca4         {{f/Cond|<nowiki>If angle > 0xc00 (> 270°)</nowiki>}}
−
  0001bc9c: 08006f30 j 0x0001bcc0 |Finish function
+
  0001bc88: 34020c00 ori r2,r0,0x0c00             |{{f/std|<nowiki>r2 = 0x0c00</nowiki>}}
−
  0001bca0: 00000000 nop |
+
  0001bc8c: 00041040 sll r2,r4,0x01                   |{{f/std|<nowiki>r2 =angle * 2</nowiki>}}
−
  0001bca4: 00441023 subu r2,r2,r4 #r2 = r4 * 2
+
  0001bc90: 3c018003 lui r1,0x8003                     |{{f/std|<nowiki>r1 = 0x80030000</nowiki>}}
−
  0001bca8: 00021040 sll r2,r2,0x01
+
  0001bc94: 00220821 addu r1,r1,r2                     |{{f/std|<nowiki>r1 = 0x80030000 + offset</nowiki>}}
−
  0001bcac: 3c018003 lui r1,0x8003
+
  0001bc98: 842298a4 lh r2,-0x675c(r1)                 |{{f/load|<nowiki>r2 = Sinus (r4 angle-270)*4096</nowiki>}} {{f/std|<nowiki>0x800298a4 + offset (ignore the first 270° of the angle - 1st available value starts at 0x8002b0a4  ( 0x800298a4 + 0xc00*2)</nowiki>}}
−
  0001bcb0: 00220821 addu r1,r1,r2
+
  0001bc9c: 08006f30 j 0x0001bcc0                     {{f/jump|<nowiki>jump to </nowiki>{{f/loc|<nowiki>end</nowiki>}}<nowiki></nowiki>}}
−
  0001bcb4: 8422b0a4 lh r2,-0x4f5c(r1) trend here is that this is a sin call function.
+
  0001bca0: 00000000 nop                               |
−
  0001bcb8: 00000000 nop
+
  0001bca4: 00441023 subu r2,r2,r4                 {{f/Cond|<nowiki>Else (Angle between 181° and 270°)</nowiki>}} {{f/std|<nowiki>r2 = 0xc00 - angle</nowiki>}}
−
  0001bcbc: 00021023 subu r2,r0,r2 obtain negative r2
+
  0001bca8: 00021040 sll r2,r2,0x01               |{{f/std|<nowiki>r2 * 2</nowiki>}}
−
  0001bcc0: 03e00008 jr r31
+
  0001bcac: 3c018003 lui r1,0x8003                 |{{f/std|<nowiki>r1 = 0x80030000</nowiki>}}
 +
  0001bcb0: 00220821 addu r1,r1,r2                 |{{f/std|<nowiki>r1 = 0x80030000 + offset</nowiki>}}
 +
  0001bcb4: 8422b0a4 lh r2,-0x4f5c(r1)             |{{f/load|<nowiki>r2 = [Sinus(270-r4 angle)]*4096</nowiki>}}
 +
  0001bcb8: 00000000 nop                           |
 +
  0001bcbc: 00021023 subu r2,r0,r2                 |{{f/std|<nowiki>r2 = - [Sinus(270-r4 angle)]*4096</nowiki>}}
 +
  0001bcc0: 03e00008 jr r31                      
 
  0001bcc4: 00000000 nop
 
  0001bcc4: 00000000 nop
−
</font>
+
=== Return locations ===
 +
'''Battle.bin'''
 +
0007af9c: [[0007af44_-_0007b4e8]]
 +
001a5450: [[001a5394_-_001a5794]]
 +
001a5864: [[001a5798_-_001a5b44]]
 +
001a885c: [[001a8834_-_001a8894]]
 +
001a897c: [[001a894c_-_001a89ac]]
 +
001a89e0: [[001a89b0_-_001a8a10]]
 +
001a8b18: [[001a8ae8_-_001a8b48]]
 +
001a8b7c: [[001a8b4c_-_001a8bac]]
 +
001af214: 001af108 - 001af3a0
 +
001afba4: 001afb38 - 001afd8c
 +
001b1164: 001b0ffc - 001b1538
 +
001b1fa8: 001b1c04 - 001b27d8
 +
001b2048: 001b1c04 - 001b27d8
 +
001b44fc: 001b4234 - 001b47dc

Revision as of 20:13, 11 January 2022

Parameters : r4 = angle  value (degrees*1024/90)

Returns : r2 = sinus (90-angle)*4096 if angle <= 90°
          r2 = -sinus (angle -90)*4096 if angle is between 91° and 180°
          r2 = sinus (angle -270)*4096 if angle is > 270° (0° to -90°)
          r2 = -sinus (270-angle) if angle is between 181° and 270° (-90° to 180°)
----------------------------------------------------------------------------------------------------------
0001bc28: 04810002 bgez r4,0x0001bc34            #If input value < 0x00
0001bc2c: 00000000 nop                               |
0001bc30: 00042023 subu r4,r0,r4                     |r4 = input positive value
0001bc34: 30840fff andi r4,r4,0x0fff             |r4 = remainder of r4/4096 4096 = 360°
0001bc38: 28820801 slti r2,r4,0x0801             |r2 x 0x01 if angle < 0x801
0001bc3c: 10400010 beq r2,r0,0x0001bc80          #If angle < 0x801 (angle <= 180°)
0001bc40: 28820401 slti r2,r4,0x0401                 |r2 = 0x01 if angle <= 0x400
0001bc44: 10400008 beq r2,r0,0x0001bc68              #If angle <= 0x400  (angle <= 90°) #Branch if > 0x400
0001bc48: 34020400 ori r2,r0,0x0400                      |r2 = 0x400
0001bc4c: 00441023 subu r2,r2,r4                         |r2 = 0x400 -angle (r4/4096)
0001bc50: 00021040 sll r2,r2,0x01                        |r2 * 2
0001bc54: 3c018003 lui r1,0x8003                         |r1 = 0x80030000
0001bc58: 00220821 addu r1,r1,r2                         |r1 = 0x80030000 + offset
0001bc5c: 8422b0a4 lh r2,-0x4f5c(r1)                     |r2 = [Sinus(90-r4 angle)]*4096 0x8002b0a4 + offset
0001bc60: 08006f30 j 0x0001bcc0                          >>jump to end
0001bc64: 00000000 nop                                   |
0001bc68: 00041040 sll r2,r4,0x01                    #Else (angle > 400) (>90°) #r2 = angle * 2
0001bc6c: 3c018003 lui r1,0x8003                     |r1 = 0x80030000
0001bc70: 00220821 addu r1,r1,r2                     |r1 = 0x80030000 + offset
0001bc74: 8422a8a4 lh r2,-0x575c(r1)                 |r2 = Sinus (r4 angle-90)*4096 0x8002a8a4 + offset (ignore the first 90° of the angle - 1st available value starts at 0x8002b0a4  ( 0x8002a8a4 + 0x400*2)
0001bc78: 08006f30 j 0x0001bcc0                      >>jump to end
0001bc7c: 00021023 subu r2,r0,r2                     |r2 = - Sinus (r4 angle)*4096
0001bc80: 28820c01 slti r2,r4,0x0c01             #Else (Angle > 180°) r2 = 0x01 if angle <= 270°
0001bc84: 14400007 bne r2,r0,0x0001bca4          #If angle > 0xc00 (> 270°)
0001bc88: 34020c00 ori r2,r0,0x0c00              |r2 = 0x0c00
0001bc8c: 00041040 sll r2,r4,0x01                    |r2 =angle * 2
0001bc90: 3c018003 lui r1,0x8003                     |r1 = 0x80030000
0001bc94: 00220821 addu r1,r1,r2                     |r1 = 0x80030000 + offset
0001bc98: 842298a4 lh r2,-0x675c(r1)                 |r2 = Sinus (r4 angle-270)*4096 0x800298a4 + offset (ignore the first 270° of the angle - 1st available value starts at 0x8002b0a4  ( 0x800298a4 + 0xc00*2)
0001bc9c: 08006f30 j 0x0001bcc0                      >>jump to end
0001bca0: 00000000 nop                               |
0001bca4: 00441023 subu r2,r2,r4                 #Else (Angle between 181° and 270°) r2 = 0xc00 - angle
0001bca8: 00021040 sll r2,r2,0x01                |r2 * 2
0001bcac: 3c018003 lui r1,0x8003                 |r1 = 0x80030000
0001bcb0: 00220821 addu r1,r1,r2                 |r1 = 0x80030000 + offset
0001bcb4: 8422b0a4 lh r2,-0x4f5c(r1)             |r2 = [Sinus(270-r4 angle)]*4096
0001bcb8: 00000000 nop                           |
0001bcbc: 00021023 subu r2,r0,r2                 |r2 = - [Sinus(270-r4 angle)]*4096
0001bcc0: 03e00008 jr r31                        
0001bcc4: 00000000 nop

Return locations

Battle.bin
0007af9c: 0007af44_-_0007b4e8
001a5450: 001a5394_-_001a5794
001a5864: 001a5798_-_001a5b44
001a885c: 001a8834_-_001a8894
001a897c: 001a894c_-_001a89ac 
001a89e0: 001a89b0_-_001a8a10
001a8b18: 001a8ae8_-_001a8b48
001a8b7c: 001a8b4c_-_001a8bac
001af214: 001af108 - 001af3a0
001afba4: 001afb38 - 001afd8c
001b1164: 001b0ffc - 001b1538
001b1fa8: 001b1c04 - 001b27d8
001b2048: 001b1c04 - 001b27d8
001b44fc: 001b4234 - 001b47dc
Retrieved from "https://ffhacktics.com/w/index.php?title=Cos_call_function&oldid=22521"