Difference between revisions of "Call Sin function"
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(Created page with "<font face='Courier New'> 0001bb5c: 27bdffe8 addiu r29,r29,0xffe8 0001bb60: 04800005 bltz r4,0x0001bb78 0001bb64: afbf0010 sw r31,0x0010(r29) 0001bb68: 0c006ee6 jal 0x00...") |
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0001bb5c: 27bdffe8 addiu r29,r29,0xffe8 | 0001bb5c: 27bdffe8 addiu r29,r29,0xffe8 | ||
| − | 0001bb60: 04800005 bltz r4,0x0001bb78 | + | 0001bb60: 04800005 bltz r4,0x0001bb78 Branch if input angle is less than 0 |
0001bb64: afbf0010 sw r31,0x0010(r29) | 0001bb64: afbf0010 sw r31,0x0010(r29) | ||
| − | 0001bb68: 0c006ee6 jal 0x0001bb98 | + | 0001bb68: 0c006ee6 jal 0x0001bb98 |
| − | 0001bb6c: 30840fff andi r4,r4,0x0fff | + | 0001bb6c: 30840fff andi r4,r4,0x0fff Bitmask 0x0fff from angle |
| − | 0001bb70: 08006ee2 j 0x0001bb88 | + | 0001bb70: 08006ee2 j 0x0001bb88 End |
0001bb74: 00000000 nop | 0001bb74: 00000000 nop | ||
| − | 0001bb78: 00042023 subu r4,r0,r4 | + | |
| + | for r4 < 0 | ||
| + | 0001bb78: 00042023 subu r4,r0,r4 -angle (necessarily positive here.) | ||
0001bb7c: 0c006ee6 jal 0x0001bb98 | 0001bb7c: 0c006ee6 jal 0x0001bb98 | ||
| − | 0001bb80: 30840fff andi r4,r4,0x0fff | + | 0001bb80: 30840fff andi r4,r4,0x0fff bit mask 0x0fff from angle |
| − | 0001bb84: 00021023 subu r2,r0,r2 | + | 0001bb84: 00021023 subu r2,r0,r2 Obtain negative result if negative angle |
| + | |||
| + | Return: | ||
0001bb88: 8fbf0010 lw r31,0x0010(r29) | 0001bb88: 8fbf0010 lw r31,0x0010(r29) | ||
0001bb8c: 27bd0018 addiu r29,r29,0x0018 | 0001bb8c: 27bd0018 addiu r29,r29,0x0018 | ||
Revision as of 05:48, 20 March 2022
0001bb5c: 27bdffe8 addiu r29,r29,0xffe8 0001bb60: 04800005 bltz r4,0x0001bb78 Branch if input angle is less than 0 0001bb64: afbf0010 sw r31,0x0010(r29) 0001bb68: 0c006ee6 jal 0x0001bb98 0001bb6c: 30840fff andi r4,r4,0x0fff Bitmask 0x0fff from angle 0001bb70: 08006ee2 j 0x0001bb88 End 0001bb74: 00000000 nop for r4 < 0 0001bb78: 00042023 subu r4,r0,r4 -angle (necessarily positive here.) 0001bb7c: 0c006ee6 jal 0x0001bb98 0001bb80: 30840fff andi r4,r4,0x0fff bit mask 0x0fff from angle 0001bb84: 00021023 subu r2,r0,r2 Obtain negative result if negative angle Return: 0001bb88: 8fbf0010 lw r31,0x0010(r29) 0001bb8c: 27bd0018 addiu r29,r29,0x0018 0001bb90: 03e00008 jr r31 0001bb94: 00000000 nop
