sm64

A Super Mario 64 decompilation
Log | Files | Refs | README | LICENSE

llmuldiv_gcc.s (2544B)

      1 // assembler directives
      2 .set noat      // allow manual use of $at
      3 .set noreorder // don't insert nops after branches
      4 
      5 #include "macros.inc"
      6 
      7 #ifndef VERSION_CN
      8 
      9 
     10 .section .text, "ax"
     11 
     12 /* -------------------------------------------------------------------------------------- */
     13 /* need to asm these functions because lib32gcc-7-dev-mips-cross does not exist so we     */
     14 /* cannot naturally link a libgcc variant for this target given this architecture and     */
     15 /* compiler. Until we have a good workaround with a gcc target that doesn't involve       */
     16 /* assuming a 32-bit to 64-bit change, we have to encode these functions as raw assembly  */
     17 /* for it to compile.                                                                     */
     18 /* -------------------------------------------------------------------------------------- */
     19 
     20 /* TODO: Is there a non-insane way to fix this hack that doesn't involve the user compiling */
     21 /* a library themselves?                                                                    */
     22 glabel __umoddi3
     23     sw    $a0, ($sp)
     24     sw    $a1, 4($sp)
     25     sw    $a2, 8($sp)
     26     sw    $a3, 0xc($sp)
     27     ld    $t7, 8($sp)
     28     ld    $t6, ($sp)
     29     ddivu $zero, $t6, $t7
     30     bnez  $t7, .L80324144
     31      nop
     32     break 7
     33 .L80324144:
     34     mfhi  $v0
     35     dsll32 $v1, $v0, 0
     36     dsra32 $v1, $v1, 0
     37     jr    $ra
     38      dsra32 $v0, $v0, 0
     39 
     40 glabel __udivdi3
     41     sw    $a0, ($sp)
     42     sw    $a1, 4($sp)
     43     sw    $a2, 8($sp)
     44     sw    $a3, 0xc($sp)
     45     ld    $t7, 8($sp)
     46     ld    $t6, ($sp)
     47     ddivu $zero, $t6, $t7
     48     bnez  $t7, .L80324180
     49      nop
     50     break 7
     51 .L80324180:
     52     mflo  $v0
     53     dsll32 $v1, $v0, 0
     54     dsra32 $v1, $v1, 0
     55     jr    $ra
     56      dsra32 $v0, $v0, 0
     57 
     58 glabel __moddi3
     59     sw    $a0, ($sp)
     60     sw    $a1, 4($sp)
     61     sw    $a2, 8($sp)
     62     sw    $a3, 0xc($sp)
     63     ld    $t7, 8($sp)
     64     ld    $t6, ($sp)
     65     ddivu $zero, $t6, $t7
     66     bnez  $t7, .L803241E8
     67      nop
     68     break 7
     69 .L803241E8:
     70     mfhi  $v0
     71     dsll32 $v1, $v0, 0
     72     dsra32 $v1, $v1, 0
     73     jr    $ra
     74      dsra32 $v0, $v0, 0
     75 
     76 glabel __divdi3
     77     sw    $a0, ($sp)
     78     sw    $a1, 4($sp)
     79     sw    $a2, 8($sp)
     80     sw    $a3, 0xc($sp)
     81     ld    $t7, 8($sp)
     82     ld    $t6, ($sp)
     83     ddiv  $zero, $t6, $t7
     84     nop
     85     bnez  $t7, .L80324228
     86      nop
     87     break 7
     88 .L80324228:
     89     daddiu $at, $zero, -1
     90     bne   $t7, $at, .L80324244
     91      daddiu $at, $zero, 1
     92     dsll32 $at, $at, 0x1f
     93     bne   $t6, $at, .L80324244
     94      nop
     95     break 6
     96 .L80324244:
     97     mflo  $v0
     98     dsll32 $v1, $v0, 0
     99     dsra32 $v1, $v1, 0
    100     jr    $ra
    101      dsra32 $v0, $v0, 0
    102 
    103 #endif