papermario/ver/us/asm/os/bzero.s
JoshDuMan bd56f6060f
Decomp Some Libultra (#588)
* Work on KMC Libultra

* libultra decomp

* fix
2021-12-29 15:14:20 -05:00

58 lines
2.4 KiB
ArmAsm

.include "macro.inc"
# assembler directives
.set noat # allow manual use of $at
.set noreorder # don't insert nops after branches
.set gp=64 # allow use of 64-bit general purpose registers
.section .text, "ax"
glabel bzero
/* 3FD70 80064970 00041823 */ negu $v1, $a0
/* 3FD74 80064974 28A1000C */ slti $at, $a1, 0xc
/* 3FD78 80064978 1420001D */ bnez $at, .L800649F0
/* 3FD7C 8006497C 00000000 */ nop
/* 3FD80 80064980 30630003 */ andi $v1, $v1, 3
/* 3FD84 80064984 10600003 */ beqz $v1, .L80064994
/* 3FD88 80064988 00A32823 */ subu $a1, $a1, $v1
/* 3FD8C 8006498C A8800000 */ swl $zero, ($a0)
/* 3FD90 80064990 00832021 */ addu $a0, $a0, $v1
.L80064994:
/* 3FD94 80064994 2401FFE0 */ addiu $at, $zero, -0x20
/* 3FD98 80064998 00A13824 */ and $a3, $a1, $at
/* 3FD9C 8006499C 10E0000C */ beqz $a3, .L800649D0
/* 3FDA0 800649A0 00A72823 */ subu $a1, $a1, $a3
/* 3FDA4 800649A4 00E43821 */ addu $a3, $a3, $a0
.L800649A8:
/* 3FDA8 800649A8 AC800000 */ sw $zero, ($a0)
/* 3FDAC 800649AC AC800004 */ sw $zero, 4($a0)
/* 3FDB0 800649B0 AC800008 */ sw $zero, 8($a0)
/* 3FDB4 800649B4 AC80000C */ sw $zero, 0xc($a0)
/* 3FDB8 800649B8 24840020 */ addiu $a0, $a0, 0x20
/* 3FDBC 800649BC AC80FFF0 */ sw $zero, -0x10($a0)
/* 3FDC0 800649C0 AC80FFF4 */ sw $zero, -0xc($a0)
/* 3FDC4 800649C4 AC80FFF8 */ sw $zero, -8($a0)
/* 3FDC8 800649C8 1487FFF7 */ bne $a0, $a3, .L800649A8
/* 3FDCC 800649CC AC80FFFC */ sw $zero, -4($a0)
.L800649D0:
/* 3FDD0 800649D0 2401FFFC */ addiu $at, $zero, -4
/* 3FDD4 800649D4 00A13824 */ and $a3, $a1, $at
/* 3FDD8 800649D8 10E00005 */ beqz $a3, .L800649F0
/* 3FDDC 800649DC 00A72823 */ subu $a1, $a1, $a3
/* 3FDE0 800649E0 00E43821 */ addu $a3, $a3, $a0
.L800649E4:
/* 3FDE4 800649E4 24840004 */ addiu $a0, $a0, 4
/* 3FDE8 800649E8 1487FFFE */ bne $a0, $a3, .L800649E4
/* 3FDEC 800649EC AC80FFFC */ sw $zero, -4($a0)
.L800649F0:
/* 3FDF0 800649F0 18A00005 */ blez $a1, .L80064A08
/* 3FDF4 800649F4 00000000 */ nop
/* 3FDF8 800649F8 00A42821 */ addu $a1, $a1, $a0
.L800649FC:
/* 3FDFC 800649FC 24840001 */ addiu $a0, $a0, 1
/* 3FE00 80064A00 1485FFFE */ bne $a0, $a1, .L800649FC
/* 3FE04 80064A04 A080FFFF */ sb $zero, -1($a0)
.L80064A08:
/* 3FE08 80064A08 03E00008 */ jr $ra
/* 3FE0C 80064A0C 00000000 */ nop