From 87dc56469e9f4c4d7b4f88b8bdb986059dddf06d Mon Sep 17 00:00:00 2001
From: Ryan Dwyer <ryandwyer1@gmail.com>
Date: Sat, 6 Nov 2021 13:40:14 +1000
Subject: [PATCH] Decompile mtx00017588

---
 src/include/lib/mtx.h |  2 +-
 src/lib/mtx.c         | 57 ++++++++++++-------------------------------
 2 files changed, 17 insertions(+), 42 deletions(-)

diff --git a/src/include/lib/mtx.h b/src/include/lib/mtx.h
index cc4c236a6..250b1a1ff 100644
--- a/src/include/lib/mtx.h
+++ b/src/include/lib/mtx.h
@@ -58,7 +58,7 @@ void mtx4LoadRotationFrom(f32 src[4][4], f32 dst[4][4]);
 u32 mtx000170e4(void);
 u32 mtx0001719c(void);
 u32 mtx000172f0(void);
-u32 mtx00017588(void);
+void mtx00017588(f32 arg0[4][4], f32 arg1[4][4]);
 void mtx00017614(f32 arg0[4][4], f32 arg1[4][4]);
 f32 mtx00017a78(f32 arg0[4][4]);
 f32 mtx00017c2c(f32 arg0, f32 arg1, f32 arg2, f32 arg3, f32 arg4, f32 arg5, f32 arg6, f32 arg7, f32 arg8);
diff --git a/src/lib/mtx.c b/src/lib/mtx.c
index 4d8d42b44..00dcce033 100644
--- a/src/lib/mtx.c
+++ b/src/lib/mtx.c
@@ -1172,47 +1172,22 @@ glabel mtx000172f0
 /*    17584:	e4a60038 */ 	swc1	$f6,0x38($a1)
 );
 
-GLOBAL_ASM(
-glabel mtx00017588
-/*    17588:	27bdffe8 */ 	addiu	$sp,$sp,-24
-/*    1758c:	afbf0014 */ 	sw	$ra,0x14($sp)
-/*    17590:	afa40018 */ 	sw	$a0,0x18($sp)
-/*    17594:	0c005d85 */ 	jal	mtx00017614
-/*    17598:	afa5001c */ 	sw	$a1,0x1c($sp)
-/*    1759c:	0c005e9e */ 	jal	mtx00017a78
-/*    175a0:	8fa40018 */ 	lw	$a0,0x18($sp)
-/*    175a4:	3c013f80 */ 	lui	$at,0x3f80
-/*    175a8:	44812000 */ 	mtc1	$at,$f4
-/*    175ac:	00002825 */ 	or	$a1,$zero,$zero
-/*    175b0:	8fa6001c */ 	lw	$a2,0x1c($sp)
-/*    175b4:	24040004 */ 	addiu	$a0,$zero,0x4
-/*    175b8:	46002083 */ 	div.s	$f2,$f4,$f0
-.L000175bc:
-/*    175bc:	00001825 */ 	or	$v1,$zero,$zero
-/*    175c0:	00c01025 */ 	or	$v0,$a2,$zero
-/*    175c4:	c4500000 */ 	lwc1	$f16,0x0($v0)
-/*    175c8:	24630001 */ 	addiu	$v1,$v1,0x1
-/*    175cc:	46028482 */ 	mul.s	$f18,$f16,$f2
-/*    175d0:	50640008 */ 	beql	$v1,$a0,.L000175f4
-/*    175d4:	24420004 */ 	addiu	$v0,$v0,0x4
-.L000175d8:
-/*    175d8:	c4500004 */ 	lwc1	$f16,0x4($v0)
-/*    175dc:	24630001 */ 	addiu	$v1,$v1,0x1
-/*    175e0:	e4520000 */ 	swc1	$f18,0x0($v0)
-/*    175e4:	46028482 */ 	mul.s	$f18,$f16,$f2
-/*    175e8:	1464fffb */ 	bne	$v1,$a0,.L000175d8
-/*    175ec:	24420004 */ 	addiu	$v0,$v0,0x4
-/*    175f0:	24420004 */ 	addiu	$v0,$v0,0x4
-.L000175f4:
-/*    175f4:	e452fffc */ 	swc1	$f18,-0x4($v0)
-/*    175f8:	24a50001 */ 	addiu	$a1,$a1,0x1
-/*    175fc:	14a4ffef */ 	bne	$a1,$a0,.L000175bc
-/*    17600:	24c60010 */ 	addiu	$a2,$a2,0x10
-/*    17604:	8fbf0014 */ 	lw	$ra,0x14($sp)
-/*    17608:	27bd0018 */ 	addiu	$sp,$sp,0x18
-/*    1760c:	03e00008 */ 	jr	$ra
-/*    17610:	00000000 */ 	nop
-);
+void mtx00017588(f32 arg0[4][4], f32 arg1[4][4])
+{
+	s32 i;
+	s32 j;
+	f32 tmp;
+
+	mtx00017614(arg0, arg1);
+
+	tmp = 1.0f / mtx00017a78(arg0);
+
+	for (i = 0; i < 4; i++) {
+		for (j = 0; j < 4; j++) {
+			arg1[i][j] *= tmp;
+		}
+	}
+}
 
 void mtx00017614(f32 arg0[4][4], f32 arg1[4][4])
 {