song ops

legend:
  imm:  16-bit immediate
        hi byte range 0x00..0x0F
        lo byte range 0x00..0x3C, 0xC4..0xFF
  rs:   $v0, $t2, $s2, $k0
  rd:   $zero, $at
  psa:  multiple of 4 in range 0..31
  nsa:  3..31
  sa:   psa or nsa

possible but not listed:
  syscall, break, sync, cache, tge, tgeu, tlt, tltu, teq, tne

0057xxx0  sll     rd, $s7, psa
0057xxx2  srl     rd, $s7, psa
0057xxx3  sra     rd, $s7, psa
0057xxx4  sllv    rd, $s7, rs
0057xxx6  srlv    rd, $s7, rs
0057xxx7  srav    rd, $s7, rs
0057xxx8  jr      rs
0057xxx9  jalr    rd, rs
0057xxx0  mfhi    rd
0057xxx1  mthi    rs
0057xxx2  mflo    rd
0057xxx3  mtlo    rs
0057xxx4  dsllv   rd, $s7, rs
0057xxx6  dsrlv   rd, $s7, rs
0057xxx7  dsrav   rd, $s7, rs
0057xxx8  mult    rs, $s7
0057xxx9  multu   rs, $s7
0057xxxA  div     rs, $s7
0057xxxB  divu    rs, $s7
0057xxxC  dmult   rs, $s7
0057xxxD  dmultu  rs, $s7
0057xxxE  ddiv    rs, $s7
0057xxxF  ddivu   rs, $s7
0057xxx0  add     rd, rs, $s7
0057xxx1  addu    rd, rs, $s7
0057xxx2  sub     rd, rs, $s7
0057xxx3  subu    rd, rs, $s7
0057xxx4  and     rd, rs, $s7
0057xxx5  or      rd, rs, $s7
0057xxx6  xor     rd, rs, $s7
0057xxx7  nor     rd, rs, $s7
0057xxxA  slt     rd, rs, $s7
0057xxxB  sltu    rd, rs, $s7
0057xxxC  dadd    rd, rs, $s7
0057xxxD  daddu   rd, rs, $s7
0057xxxE  dsub    rd, rs, $s7
0057xxxF  dsubu   rd, rs, $s7
0057xxx8  dsll    rd, $s7, sa
0057xxxA  dsrl    rd, $s7, sa
0057xxxB  dsra    rd, $s7, sa
0057xxxC  dsll32  rd, $s7, sa
0057xxxE  dsrl32  rd, $s7, nsa
0057xxxF  dsra32  rd, $s7, nsa
0857xxxx  j       0x815C0000 + 4 * imm
0957xxxx  j       0x855C0000 + 4 * imm
0A57xxxx  j       0x895C0000 + 4 * imm
0B57xxxx  j       0x8D5C0000 + 4 * imm
0C57xxxx  jal     0x815C0000 + 4 * imm
0D57xxxx  jal     0x855C0000 + 4 * imm
0E57xxxx  jal     0x895C0000 + 4 * imm
0F57xxxx  jal     0x8D5C0000 + 4 * imm
1x57xxxx  beq     rs, $s7, imm
1x57xxxx  bne     rs, $s7, imm
1x57xxxx  blez    rs, imm
1x57xxxx  bgtz    rs, imm
2x57xxxx  addi    $s7, rs, imm
2x57xxxx  addiu   $s7, rs, imm
2x57xxxx  slti    $s7, rs, imm
2x57xxxx  sltiu   $s7, rs, imm
3x57xxxx  andi    $s7, rs, imm
3x57xxxx  ori     $s7, rs, imm
3x57xxxx  xori    $s7, rs, imm
3x57xxxx  lui     $s7, imm
44570xxx  cfc1    $s7, $fcr0
5x57xxxx  beql    rs, $s7, imm
5x57xxxx  bnel    rs, $s7, imm
5x57xxxx  blezl   rs, imm
5x57xxxx  bgtzl   rs, imm
6x57xxxx  daddi   $s7, rs, imm
6x57xxxx  daddiu  $s7, rs, imm
6x57xxxx  ldl     $s7, imm(rs)
6x57xxxx  ldr     $s7, imm(rs)
8x57xxxx  lb      $s7, imm(rs)
8x57xxxx  lh      $s7, imm(rs)
8x57xxxx  lwl     $s7, imm(rs)
8x57xxxx  lw      $s7, imm(rs)
9x57xxxx  lbu     $s7, imm(rs)
9x57xxxx  lhu     $s7, imm(rs)
9x57xxxx  lwr     $s7, imm(rs)
9x57xxxx  lwu     $s7, imm(rs)
Ax57xxxx  sb      $s7, imm(rs)
Ax57xxxx  sh      $s7, imm(rs)
A857xxxx  swl     $s7, imm(rs)
AC57xxxx  sw      $s7, imm(rs)
B057xxxx  sdl     $s7, imm(rs)
B457xxxx  sdr     $s7, imm(rs)
B857xxxx  swr     $s7, imm(rs)
C057xxxx  ll      $s7, imm(rs)
C457xxxx  lwc1    $f23, imm(rs)
D057xxxx  lld     $s7, imm(rs)
D457xxxx  ldc1    $f23, imm(rs)
DC57xxxx  ld      $s7, imm(rs)
E057xxxx  sc      $s7, imm(rs)
E457xxxx  swc1    $f23, imm(rs)
F057xxxx  scd     $s7, imm(rs)
F457xxxx  sdc1    $f23, imm(rs)
FC57xxxx  sd      $s7, imm(rs)