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Decompile mtx00016798

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Ryan Dwyer committed 2022-07-23 11:23:10 +10:00
1 parent 9a3824458c
commit 98916c96f2
2 files changed
+21 -39
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src/include/lib/mtx.h
+1 -1
View File
@@ -45,7 +45,7 @@ void mtx00016710(f32 mult, f32 mtx[4][4]);
void mtx00016748(f32 arg0);
void mtx00016760(void);
void mtx00016784(void);
void mtx00016798(Mtxf *arg0, Mtxf *arg1);
void mtx00016798(Mtxf *src, Mtxf *dst);
void mtx00016820(Mtx *src, Mtx *dst);
void mtx00016874(Mtxf *mtx, f32 posx, f32 posy, f32 posz, f32 lookx, f32 looky, f32 lookz, f32 upx, f32 upy, f32 upz);
void mtx00016ae4(Mtxf *mtx, f32 posx, f32 posy, f32 posz, f32 lookx, f32 looky, f32 lookz, f32 upx, f32 upy, f32 upz);
src/lib/mtx.c
+20 -38
View File
@@ -270,44 +270,26 @@ void mtx00016784(void)
var8005ef10[0] = g_Vars.unk000510;
}
GLOBAL_ASM(
glabel mtx00016798
/* 16798: 3c0a8006 */ lui $t2,%hi(var8005ef10)
/* 1679c: 254aef10 */ addiu $t2,$t2,%lo(var8005ef10)
/* 167a0: 00001025 */ or $v0,$zero,$zero
/* 167a4: 00803825 */ or $a3,$a0,$zero
/* 167a8: 240b0008 */ addiu $t3,$zero,0x8
/* 167ac: 3c09ffff */ lui $t1,0xffff
.L000167b0:
/* 167b0: 8ce30000 */ lw $v1,0x0($a3)
/* 167b4: 8ce60020 */ lw $a2,0x20($a3)
/* 167b8: c5480000 */ lwc1 $f8,0x0($t2)
/* 167bc: 0069c024 */ and $t8,$v1,$t1
/* 167c0: 0006cc02 */ srl $t9,$a2,0x10
/* 167c4: 03196025 */ or $t4,$t8,$t9
/* 167c8: 448c2000 */ mtc1 $t4,$f4
/* 167cc: 000278c0 */ sll $t7,$v0,0x3
/* 167d0: 00af4021 */ addu $t0,$a1,$t7
/* 167d4: 468021a0 */ cvt.s.w $f6,$f4
/* 167d8: 00036c00 */ sll $t5,$v1,0x10
/* 167dc: 30ceffff */ andi $t6,$a2,0xffff
/* 167e0: 01ae7825 */ or $t7,$t5,$t6
/* 167e4: 448f8000 */ mtc1 $t7,$f16
/* 167e8: 30580001 */ andi $t8,$v0,0x1
/* 167ec: 46083283 */ div.s $f10,$f6,$f8
/* 167f0: 0018c880 */ sll $t9,$t8,0x2
/* 167f4: 01596021 */ addu $t4,$t2,$t9
/* 167f8: 24420001 */ addiu $v0,$v0,0x1
/* 167fc: 468084a0 */ cvt.s.w $f18,$f16
/* 16800: 24e70004 */ addiu $a3,$a3,0x4
/* 16804: e50a0000 */ swc1 $f10,0x0($t0)
/* 16808: c5840000 */ lwc1 $f4,0x0($t4)
/* 1680c: 46049183 */ div.s $f6,$f18,$f4
/* 16810: 144bffe7 */ bne $v0,$t3,.L000167b0
/* 16814: e5060004 */ swc1 $f6,0x4($t0)
/* 16818: 03e00008 */ jr $ra
/* 1681c: 00000000 */ nop
);
/**
* src is passed as an Mtxf but it's read as words rather than floats.
* It might be an Mtx rather than Mtxf.
*
* @TODO: Investigate
*/
void mtx00016798(Mtxf *src, Mtxf *dst)
{
u32 *srcwords = (u32 *) src;
f32 *dstfloats = (f32 *) dst;
s32 i;
for (i = 0; i < 8; i++) {
u32 word1 = srcwords[i + 0];
u32 word2 = srcwords[i + 8];
dstfloats[(i << 1) + 0] = (s32) (word1 & 0xffff0000 | word2 >> 16) / var8005ef10[0];
dstfloats[(i << 1) + 1] = (s32) (word1 << 16 | word2 & 0xffff) / var8005ef10[i & 1];
}
}
void mtx00016820(Mtx *src, Mtx *dst)
{