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Improve the state of handwritten assembly files (#865)

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* Format all handwritten asm and document some

* Use c preprocessor for constants

* Fix

* Fix PI_STATUS_ERROR, some label improvements

* Avoid hi/lo for constants

* Some more comments

* Properly mark functions as functions and their sizes

* Fix merge

* Improvements

* Review suggestions, rework procedure start/end macros to be more like libreultra

* Move IPL3 symbol definitions into ipl3.s

* Fix undefined_syms, add include and language guards to asm.h and fix the comment in gbi.h

* Consistent hex capitalization, add some MIPS builtin defines to CC_CHECK to behave properly

* Add -no-pad-sections assembler option and clean up alignment in gu files and bzero

* Further suggestions and improvements

* Matrix conversion function clarifications

* Fix passing AVOID_UB to gcc

* Suggestions

* Suggestions, global interrupt mask improvements

* Further suggestions, interrupt mask comments

* Comments fixes, rdb.h

* Switch from # comments to // comments, remove unnecesary .set gp=64 directives

* Further review suggestions

* Missed one
This commit is contained in:
Tharo 2022-05-01 00:03:22 +01:00 • committed by GitHub
parent b9fded7b4e
commit 7334ffa373
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62 changed files with 2758 additions and 2083 deletions
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62
asm/entry.s
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@ -1,37 +1,35 @@
.include "macro.inc"
#include "ultra64/asm.h"
#include "boot.h"
# 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
.set noat
.set noreorder
.section .text
.set BOOT_STACK_SIZE, 0x400
.balign 16
glabel entrypoint # 0x80000400
lui $t0, %hi(_bootSegmentBssStart)
addiu $t0, %lo(_bootSegmentBssStart)
li $t1, %lo(_bootSegmentBssSize)
.L8000040C:
addi $t1, $t1, -8
sw $zero, ($t0)
sw $zero, 4($t0)
bnez $t1, .L8000040C
addi $t0, $t0, 8
lui $t2, %hi(bootproc)
lui $sp, %hi(sBootThreadStack + BOOT_STACK_SIZE)
addiu $t2, %lo(bootproc)
jr $t2
addiu $sp, %lo(sBootThreadStack + BOOT_STACK_SIZE)
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
LEAF(entrypoint)
// Clear boot segment .bss
la $t0, _bootSegmentBssStart
#ifndef AVOID_UB
// UB: li only loads the lower 16 bits of _bootSegmentBssSize when it may be larger than this,
// so not all of bss may be cleared if it is too large
li $t1, _bootSegmentBssSize
#else
la $t1, _bootSegmentBssSize
#endif
.clear_bss:
addi $t1, $t1, -8
sw $zero, ($t0)
sw $zero, 4($t0)
bnez $t1, .clear_bss
addi $t0, $t0, 8
// Set up stack and enter program code
lui $t2, %hi(bootproc)
lui $sp, %hi(sBootThreadStack + BOOT_STACK_SIZE)
addiu $t2, %lo(bootproc)
jr $t2
addiu $sp, %lo(sBootThreadStack + BOOT_STACK_SIZE)
END(entrypoint)
.fill 0x60 - (. - entrypoint)