mirror of
https://github.com/zeldaret/oot.git
synced 2024-11-11 03:39:59 +00:00
7334ffa373
* 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
41 lines
821 B
ArmAsm
41 lines
821 B
ArmAsm
#include "ultra64/asm.h"
|
|
|
|
.set noat
|
|
.set noreorder
|
|
|
|
.section .text
|
|
|
|
.balign 32
|
|
|
|
#define MTX_INTPART 0
|
|
#define MTX_FRACPART 0x20
|
|
|
|
LEAF(guMtxL2F)
|
|
li $at, 0x37800000 // 1.0f / 65536.0f
|
|
mtc1 $at, $f0
|
|
li $t9, 0xFFFF0000
|
|
addiu $t8, $a1, MTX_FRACPART
|
|
1:
|
|
lw $t0, MTX_INTPART($a1)
|
|
lw $t1, MTX_FRACPART($a1)
|
|
addiu $a1, $a1, 4
|
|
and $t2, $t0, $t9
|
|
srl $t3, $t1, 0x10
|
|
or $t4, $t2, $t3
|
|
mtc1 $t4, $f4
|
|
sll $t5, $t0, 0x10
|
|
andi $t6, $t1, 0xFFFF
|
|
or $t7, $t5, $t6
|
|
cvt.s.w $f6, $f4
|
|
mtc1 $t7, $f10
|
|
addiu $a0, $a0, 8
|
|
cvt.s.w $f16, $f10
|
|
mul.s $f8, $f6, $f0
|
|
nop
|
|
mul.s $f18, $f16, $f0
|
|
swc1 $f8, -8($a0)
|
|
bne $a1, $t8, 1b
|
|
swc1 $f18, -4($a0)
|
|
jr $ra
|
|
nop
|
|
END(guMtxL2F)
|