(dbx) main/20 i
  [main:14, 0x120001140]        ldah    gp, 8192(r27)
  [main:14, 0x120001144]        lda     gp, 28480(gp)
> [main:15, 0x120001148]        bis     r31, r31, r31
  [main:15, 0x12000114c]        ldl     r1, -32768(gp)
  [main:16, 0x120001150]        ldah    r2, -1(gp)
  [main:16, 0x120001154]        ldl     r2, 32656(r2)
  [main:17, 0x120001158]        ldah    r28, -1(gp)
  [main:17, 0x12000115c]        stl     r1, 32656(r28)
  [main:18, 0x120001160]        bis     r31, r31, r31
  [main:18, 0x120001164]        stl     r2, -32768(gp)
  [main:19, 0x120001168]        ldq     r28, -32736(gp)
  [main:19, 0x12000116c]        bsr     r31, main+0x38(line 22)
  [main:20, 0x120001170]        bis     r31, r31, r31
  [main:21, 0x120001174]        bis     r31, r31, r31
  [main:22, 0x120001178]        bis     r31, r31, r31
  [main:24, 0x12000117c]        ldq_u   r31, 0(sp)