Difference between revisions of "Call Begin transfer data to SPU"
Jump to navigation
Jump to search
m |
m |
||
| Line 1: | Line 1: | ||
<font face='Courier New'> | <font face='Courier New'> | ||
| − | + | p1 = ram address to read data from | |
| + | p2 = num bytes of data | ||
| + | |||
00019dd8: 27bdffe8 addiu r29,r29,0xffe8 | 00019dd8: 27bdffe8 addiu r29,r29,0xffe8 | ||
00019ddc: afb00010 sw r16,0x0010(r29) | 00019ddc: afb00010 sw r16,0x0010(r29) | ||
| Line 6: | Line 8: | ||
00019de4: 3c020007 lui r2,0x0007 | 00019de4: 3c020007 lui r2,0x0007 | ||
00019de8: 3442eff0 ori r2,r2,0xeff0 | 00019de8: 3442eff0 ori r2,r2,0xeff0 | ||
| − | 00019dec: 0050102b sltu r2,r2,r16 | + | 00019dec: 0050102b sltu r2,r2,r16 |
| − | 00019df0: 10400003 beq r2,r0,0x00019e00 | + | 00019df0: 10400003 beq r2,r0,0x00019e00 if requested bytes are larger than 0x7eff0, read that many bytes |
00019df4: afbf0014 sw r31,0x0014(r29) | 00019df4: afbf0014 sw r31,0x0014(r29) | ||
00019df8: 3c100007 lui r16,0x0007 | 00019df8: 3c100007 lui r16,0x0007 | ||
| − | 00019dfc: 3610eff0 ori r16,r16,0xeff0 | + | 00019dfc: 3610eff0 ori r16,r16,0xeff0 if requested bytes are smaller than 0x7eff0, read 0x0007eff0 bytes to SPU |
| − | 00019e00: 0c006457 jal 0x0001915c [[ | + | 00019e00: 0c006457 jal 0x0001915c [[Begin transfer data to SPU]] |
00019e04: 02002821 addu r5,r16,r0 | 00019e04: 02002821 addu r5,r16,r0 | ||
00019e08: 3c028003 lui r2,0x8003 | 00019e08: 3c028003 lui r2,0x8003 | ||
| Line 17: | Line 19: | ||
00019e10: 00000000 nop | 00019e10: 00000000 nop | ||
00019e14: 14400003 bne r2,r0,0x00019e24 branch if a callback function exists | 00019e14: 14400003 bne r2,r0,0x00019e24 branch if a callback function exists | ||
| − | 00019e18: 02001021 addu r2,r16,r0 | + | 00019e18: 02001021 addu r2,r16,r0 return number of bytes |
00019e1c: 3c018003 lui r1,0x8003 | 00019e1c: 3c018003 lui r1,0x8003 | ||
00019e20: ac20ad78 sw r0,-0x5288(r1) | 00019e20: ac20ad78 sw r0,-0x5288(r1) | ||
Revision as of 04:18, 22 January 2025
p1 = ram address to read data from p2 = num bytes of data
00019dd8: 27bdffe8 addiu r29,r29,0xffe8 00019ddc: afb00010 sw r16,0x0010(r29) 00019de0: 00a08021 addu r16,r5,r0 00019de4: 3c020007 lui r2,0x0007 00019de8: 3442eff0 ori r2,r2,0xeff0 00019dec: 0050102b sltu r2,r2,r16 00019df0: 10400003 beq r2,r0,0x00019e00 if requested bytes are larger than 0x7eff0, read that many bytes 00019df4: afbf0014 sw r31,0x0014(r29) 00019df8: 3c100007 lui r16,0x0007 00019dfc: 3610eff0 ori r16,r16,0xeff0 if requested bytes are smaller than 0x7eff0, read 0x0007eff0 bytes to SPU 00019e00: 0c006457 jal 0x0001915c Begin transfer data to SPU 00019e04: 02002821 addu r5,r16,r0 00019e08: 3c028003 lui r2,0x8003 00019e0c: 8c42ad7c lw r2,-0x5284(r2) SPU callback function 00019e10: 00000000 nop 00019e14: 14400003 bne r2,r0,0x00019e24 branch if a callback function exists 00019e18: 02001021 addu r2,r16,r0 return number of bytes 00019e1c: 3c018003 lui r1,0x8003 00019e20: ac20ad78 sw r0,-0x5288(r1) 00019e24: 8fbf0014 lw r31,0x0014(r29) 00019e28: 8fb00010 lw r16,0x0010(r29) 00019e2c: 27bd0018 addiu r29,r29,0x0018 00019e30: 03e00008 jr r31 00019e34: 00000000 nop
