From da3235087350fa3f9566bbd00dc9e902be43ed41 Mon Sep 17 00:00:00 2001
From: Drew T <50529377+Druthulu@users.noreply.github.com>
Date: Mon, 31 Aug 2026 22:18:35 -0600
Subject: [PATCH] =?UTF-8?q?feat(decomp):=20main=20in-tree=20gate=20?=
 =?UTF-8?q?=E2=80=94=201=20fn(s)?=
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  main  func_80013B64
---
 src/800.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 104 insertions(+), 1 deletion(-)

diff --git a/src/800.c b/src/800.c
index 8477d9092..6a9da0e15 100644
--- a/src/800.c
+++ b/src/800.c
@@ -1385,7 +1385,110 @@ void func_800139C8(s16 param_1, void *param_2, void *param_3)
     ApplyMatrixSV(ip, param_2, param_3);
 }
 
-INCLUDE_ASM("asm/nonmatchings/800", func_80013B64);
+extern void func_80013F3C();
+extern s32 func_8004787C(s32 angle);
+extern s32 func_80047948(s32 angle);
+extern void func_8001282C();
+extern void func_800484EC();
+
+void func_80013B64(s32 param_1, s32 param_2, s32 param_3)
+{
+    s16 ident[16];
+    s16 rot[16];
+    s32 sin_val;
+    s32 cos_val;
+    register s32 v1 __asm__("$3");
+    register s16 *v0p __asm__("$2");
+    s16 *m0p;
+
+    func_80013F3C(ident);
+    sin_val = func_8004787C((s16)param_1);
+    cos_val = func_80047948((s16)param_1);
+
+    v1 = -sin_val;
+    __asm__ __volatile__("");
+    rot[0] = (s16)cos_val;
+    rot[4] = (s16)cos_val;
+    rot[8] = 0x1000;
+    __asm__ __volatile__("");
+    v0p = rot;
+    rot[3] = (s16)sin_val;
+    m0p = ident;
+    rot[1] = (s16)v1;
+    rot[2] = 0;
+    rot[5] = 0;
+    rot[6] = 0;
+    rot[7] = 0;
+
+    __asm__ __volatile__ (
+        "lw $12, 0(%1);"
+        "lw $13, 4(%1);"
+        "ctc2 $12, $0;"
+        "ctc2 $13, $1;"
+        "lw $12, 8(%1);"
+        "lw $13, 12(%1);"
+        "lw $14, 16(%1);"
+        "ctc2 $12, $2;"
+        "ctc2 $13, $3;"
+        "ctc2 $14, $4;"
+        "lhu $12, 0(%0);"
+        "lhu $13, 6(%0);"
+        "lhu $14, 12(%0);"
+        "mtc2 $12, $9;"
+        "mtc2 $13, $10;"
+        "mtc2 $14, $11;"
+        "nop;"
+        "nop;"
+        "mvmva 1, 0, 3, 3, 0;"
+        "mfc2 $12, $9;"
+        "mfc2 $13, $10;"
+        "mfc2 $14, $11;"
+        "sh $12, 0(%1);"
+        "sh $13, 6(%1);"
+        "sh $14, 12(%1);"
+        "addiu $2, $sp, 50;"
+        "lhu $12, 0($2);"
+        "lhu $13, 6($2);"
+        "lhu $14, 12($2);"
+        "mtc2 $12, $9;"
+        "mtc2 $13, $10;"
+        "mtc2 $14, $11;"
+        "nop;"
+        "nop;"
+        "mvmva 1, 0, 3, 3, 0;"
+        "addiu $2, $sp, 18;"
+        "mfc2 $12, $9;"
+        "mfc2 $13, $10;"
+        "mfc2 $14, $11;"
+        "sh $12, 0($2);"
+        "sh $13, 6($2);"
+        "sh $14, 12($2);"
+        "addiu $2, $sp, 52;"
+        "lhu $12, 0($2);"
+        "lhu $13, 6($2);"
+        "lhu $14, 12($2);"
+        "mtc2 $12, $9;"
+        "mtc2 $13, $10;"
+        "mtc2 $14, $11;"
+        "nop;"
+        "nop;"
+        "mvmva 1, 0, 3, 3, 0;"
+        "addiu $2, $sp, 20;"
+        "mfc2 $12, $9;"
+        "mfc2 $13, $10;"
+        "mfc2 $14, $11;"
+        "sh $12, 0($2);"
+        "sh $13, 6($2);"
+        "sh $14, 12($2)"
+        :
+        : "r"(v0p), "r"(m0p)
+        : "$12", "$13", "$14", "$2"
+    );
+
+    func_8001282C(m0p);
+    func_800484EC(m0p, param_2, param_3);
+}
+
 
 #define gte_SetRotMatrixX(r0) __asm__ __volatile__ ( \
     "lw $12, 0(%0);" \