mirror/oot
1
0
Fork 0
mirror of https://github.com/zeldaret/oot.git synced 2025-08-13 18:30:35 +00:00
Code Issues Projects Releases Wiki Activity

Use IDO for assembling handwritten asm files in src (#2390)

Browse source 
* as0

* Fix ASOPTFLAGS for src/libc, remove unnecessary noreorder region in kanread

* Suggested changes

* Use %half to load the boot bss size for matching

Co-authored-by: cadmic <cadmic24@gmail.com>

* Wrap all of __osProbeTLB in noreorder

---------

Co-authored-by: cadmic <cadmic24@gmail.com>
This commit is contained in:
Tharo 2024-12-28 20:18:45 +00:00 • committed by GitHub
parent ba6a83533a
commit 7e082f0c4f
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
54 changed files with 2612 additions and 2653 deletions
Download patch file Download diff file Expand all files Collapse all files

92
src/boot/mio0.s
View file

@ -1,10 +1,7 @@
#include "ultra64/asm.h"
#include "ultra64/regdef.h"
.set noreorder
.section .text
.balign 16
.text
/**
* void Mio0_Decompress(void* src, void* dst);
@ -12,53 +9,56 @@
* Decompress Mio0 chunk
*/
LEAF(Mio0_Decompress)
lw $a3, 8($a0) // compressed offset
lw $t9, 0xC($a0) // uncompressed offset
lw $t8, 4($a0) // decompressed length
add $a3, $a3, $a0 // compressed start
add $t9, $t9, $a0 // uncompressed start
move $a2, $zero // 0
addi $a0, $a0, 0x10 // move past header
add $t8, $t8, $a1 // dst + decompressed length = end
lw a3, 0x08(a0) /* compressed offset */
lw t9, 0x0C(a0) /* uncompressed offset */
lw t8, 0x04(a0) /* decompressed length */
add a3, a3, a0 /* compressed start */
add t9, t9, a0 /* uncompressed start */
move a2, zero /* 0 */
addi a0, a0, 0x10 /* move past header */
add t8, t8, a1 /* dst + decompressed length = end */
mainloop:
bnez $a2, 1f
nop
lw $t0, ($a0)
li $a2, 32
addi $a0, $a0, 4
bnez a2, 1f
lw t0, (a0)
li a2, 32
addi a0, a0, 4
1:
slt $t1, $t0, $zero
beqz $t1, read_comp
nop
lb $t2, ($t9) // read 1 byte from uncompressed data
addi $t9, $t9, 1 // advance uncompressed start
addi $a1, $a1, 1
slt t1, t0, zero
beqz t1, read_comp
lb t2, (t9) /* read 1 byte from uncompressed data */
sb t2, (a1) /* store uncompressed byte */
addi t9, t9, 1 /* advance uncompressed start */
addi a1, a1, 1
b next_iter
sb $t2, -1($a1) // store uncompressed byte
read_comp:
lhu $t2, ($a3) // read 2 bytes from compressed data
addi $a3, $a3, 2 // advance compressed start
srl $t3, $t2, 0xC
andi $t2, $t2, 0xFFF
beqz $t3, 3f
sub $t1, $a1, $t2
addi $t3, $t3, 2
lhu t2, (a3) /* read 2 bytes from compressed data */
addi a3, a3, 2 /* advance compressed start */
srl t3, t2, 0xC
andi t2, t2, 0xFFF
sub t1, a1, t2
beqz t3, 3f
addi t3, t3, 2
2:
lb $t2, -1($t1)
addi $t3, $t3, -1
addi $t1, $t1, 1
addi $a1, $a1, 1
bnez $t3, 2b
sb $t2, -1($a1)
lb t2, -1(t1)
addi t3, t3, -1
addi t1, t1, 1
sb t2, (a1)
addi a1, a1, 1
bnez t3, 2b
next_iter:
sll $t0, $t0, 1
bne $a1, $t8, mainloop // continue until decompressed length is reached
addi $a2, $a2, -1
jr $ra
nop
sll t0, t0, 1
addi a2, a2, -1
bne a1, t8, mainloop /* continue until decompressed length is reached */
jr ra
3:
lbu $t3, ($t9)
addi $t9, $t9, 1
lbu t3, (t9)
addi t9, t9, 1
addi t3, t3, 0x12
b 2b
addi $t3, $t3, 0x12
END(Mio0_Decompress)