CoCalc -- llmuldiv

GitHub Repository: MorsGames/sm64plus
Path: blob/master/lib/asm/llmuldiv_gcc.s
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// assembler directives
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.set noat      // allow manual use of $at
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.set noreorder // don't insert nops after branches
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.set gp=64
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#include "macros.inc"
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.section .text, "ax"
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/* -------------------------------------------------------------------------------------- */
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/* need to asm these functions because lib32gcc-7-dev-mips-cross does not exist so we     */
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/* cannot naturally link a libgcc variant for this target given this architecture and     */
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/* compiler. Until we have a good workaround with a gcc target that doesn't involve       */
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/* assuming a 32-bit to 64-bit change, we have to encode these functions as raw assembly  */
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/* for it to compile.                                                                     */
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/* -------------------------------------------------------------------------------------- */
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/* TODO: Is there a non-insane way to fix this hack that doesn't involve the user compiling */
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/* a library themselves?                                                                    */
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glabel __umoddi3
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    sw    $a0, ($sp)
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    sw    $a1, 4($sp)
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    sw    $a2, 8($sp)
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    sw    $a3, 0xc($sp)
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    ld    $t7, 8($sp)
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    ld    $t6, ($sp)
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    ddivu $zero, $t6, $t7
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    bnez  $t7, .L80324144
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     nop
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    break 7
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.L80324144:
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    mfhi  $v0
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    dsll32 $v1, $v0, 0
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    dsra32 $v1, $v1, 0
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    jr    $ra
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     dsra32 $v0, $v0, 0
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glabel __udivdi3
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    sw    $a0, ($sp)
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    sw    $a1, 4($sp)
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    sw    $a2, 8($sp)
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    sw    $a3, 0xc($sp)
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    ld    $t7, 8($sp)
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    ld    $t6, ($sp)
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    ddivu $zero, $t6, $t7
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    bnez  $t7, .L80324180
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     nop
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    break 7
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.L80324180:
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    mflo  $v0
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    dsll32 $v1, $v0, 0
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    dsra32 $v1, $v1, 0
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    jr    $ra
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     dsra32 $v0, $v0, 0
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glabel __moddi3
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    sw    $a0, ($sp)
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    sw    $a1, 4($sp)
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    sw    $a2, 8($sp)
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    sw    $a3, 0xc($sp)
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    ld    $t7, 8($sp)
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    ld    $t6, ($sp)
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    ddivu $zero, $t6, $t7
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    bnez  $t7, .L803241E8
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     nop
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    break 7
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.L803241E8:
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    mfhi  $v0
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    dsll32 $v1, $v0, 0
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    dsra32 $v1, $v1, 0
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    jr    $ra
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     dsra32 $v0, $v0, 0
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glabel __divdi3
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    sw    $a0, ($sp)
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    sw    $a1, 4($sp)
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    sw    $a2, 8($sp)
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    sw    $a3, 0xc($sp)
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    ld    $t7, 8($sp)
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    ld    $t6, ($sp)
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    ddiv  $zero, $t6, $t7
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    nop
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    bnez  $t7, .L80324228
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     nop
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    break 7
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.L80324228:
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    daddiu $at, $zero, -1
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    bne   $t7, $at, .L80324244
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     daddiu $at, $zero, 1
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    dsll32 $at, $at, 0x1f
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    bne   $t6, $at, .L80324244
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     nop
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    break 6
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.L80324244:
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    mflo  $v0
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    dsll32 $v1, $v0, 0
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    dsra32 $v1, $v1, 0
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    jr    $ra
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     dsra32 $v0, $v0, 0
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