Square matrix/vector (duplicate routine?

0001d2b0: c8890000 lwc2 gtedr09_ir1,0x0000(r4)
0001d2b4: c88a0004 lwc2 gtedr10_ir2,0x0004(r4)
0001d2b8: c88b0008 lwc2 gtedr11_ir3,0x0008(r4)
0001d2bc: 00000000 nop
0001d2c0: 4aa00428 sqr
0001d2c4: e8b90000 swc2 gtedr25_mac1,0x0000(r5)
0001d2c8: e8ba0004 swc2 gtedr26_mac2,0x0004(r5)
0001d2cc: e8bb0008 swc2 gtedr27_mac3,0x0008(r5)
0001d2d0: 03e00008 jr r31
0001d2d4: 00a01021 addu r2,r5,r0