sm64/lib/asm/guScale.s
2023-08-17 08:56:02 -04:00

56 lines
1.1 KiB
ArmAsm

.set noat
.set noreorder // don't insert nops after branches
#include "macros.inc"
.section .text, "ax"
#ifdef VERSION_CN
.balign 32
glabel guScale
li $at, 0x47800000 // 65536.000000
mtc1 $at, $f4
mtc1 $a1, $f6
mul.s $f8, $f6, $f4
trunc.w.s $f10, $f8
mfc1 $t1, $f10
srl $t2, $t1, 0x10
sll $t0, $t2, 0x10
sw $t0, ($a0)
sll $t2, $t1, 0x10
sw $t2, 0x20($a0)
mtc1 $a2, $f6
mul.s $f8, $f6, $f4
trunc.w.s $f10, $f8
mfc1 $t1, $f10
srl $t0, $t1, 0x10
sw $t0, 8($a0)
andi $t2, $t1, 0xffff
sw $t2, 0x28($a0)
mtc1 $a3, $f6
mul.s $f8, $f6, $f4
trunc.w.s $f10, $f8
mfc1 $t1, $f10
srl $t2, $t1, 0x10
sll $t0, $t2, 0x10
sw $t0, 0x14($a0)
sll $t2, $t1, 0x10
sw $t2, 0x34($a0)
li $t0, 1
sw $t0, 0x1c($a0)
sw $zero, 4($a0)
sw $zero, 0xc($a0)
sw $zero, 0x10($a0)
sw $zero, 0x18($a0)
sw $zero, 0x24($a0)
sw $zero, 0x2c($a0)
sw $zero, 0x30($a0)
sw $zero, 0x38($a0)
jr $ra
sw $zero, 0x3c($a0)
#endif