# MIPS Processor: Unix COFF File Format

Assembler code

```
.text:00400838
.text:00400838  # =============== S U B R O U T I N E =======================================
.text:00400838
.text:00400838
.text:00400838 sub_400838:                              # CODE XREF: sub_400700+3C↑p
.text:00400838                                          # sub_400778+44↑p ...
.text:00400838
.text:00400838 var_s0          =  0
.text:00400838 var_s4          =  4
.text:00400838
.text:00400838                 addiu   $sp, -0x20
.text:0040083C                 sw      $s0, 0x18+var_s0($sp)
.text:00400840                 move    $s0, $a0
.text:00400844                 bnez    $s0, loc_400894
.text:00400848                 sw      $ra, 0x18+var_s4($sp)
.text:0040084C                 la      $t6, unk_10000A94
.text:00400850                 li      $t7, unk_10000455
.text:00400858                 lui     $s0, 0x1000
.text:0040085C                 sltu    $at, $t6, $t7
.text:00400860                 bnez    $at, loc_40088C
.text:00400864                 li      $s0, unk_10000454
.text:00400868
.text:00400868 loc_400868:                              # CODE XREF: sub_400838+4C↓j
.text:00400868                 beqz    $s0, loc_400878
.text:0040086C                 nop
.text:00400870                 jal     sub_400838
.text:00400874                 move    $a0, $s0
.text:00400878
.text:00400878 loc_400878:                              # CODE XREF: sub_400838:loc_400868↑j
.text:00400878                 la      $t8, unk_10000A94
.text:0040087C                 addiu   $s0, 0x10
.text:00400880                 sltu    $at, $s0, $t8
.text:00400884                 bnez    $at, loc_400868
.text:00400888                 nop
.text:0040088C
.text:0040088C loc_40088C:                              # CODE XREF: sub_400838+28↑j
.text:0040088C                 b       loc_400970
```


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