From 97c5989763ca7564b1b2d3056cd2ac0dfa712409 Mon Sep 17 00:00:00 2001
From: Ryan Dwyer <ryandwyer1@gmail.com>
Date: Tue, 26 Jan 2021 23:02:30 +1000
Subject: [PATCH] Decompile osCreateThread

---
 src/lib/ultra/os/createthread.c | 82 +++++++++++----------------------
 1 file changed, 27 insertions(+), 55 deletions(-)

diff --git a/src/lib/ultra/os/createthread.c b/src/lib/ultra/os/createthread.c
index 853cc12ea..9b886cfad 100644
--- a/src/lib/ultra/os/createthread.c
+++ b/src/lib/ultra/os/createthread.c
@@ -1,57 +1,29 @@
 #include <libultra_internal.h>
+#include "game/data/data_000000.h"
 
-GLOBAL_ASM(
-glabel osCreateThread
-/*     3ee0:	27bdffe0 */ 	addiu	$sp,$sp,-32
-/*     3ee4:	afbf001c */ 	sw	$ra,0x1c($sp)
-/*     3ee8:	afb00018 */ 	sw	$s0,0x18($sp)
-/*     3eec:	ac850014 */ 	sw	$a1,0x14($a0)
-/*     3ef0:	8fae0034 */ 	lw	$t6,0x34($sp)
-/*     3ef4:	0007c7c3 */ 	sra	$t8,$a3,0x1f
-/*     3ef8:	ac800000 */ 	sw	$zero,0x0($a0)
-/*     3efc:	ac800008 */ 	sw	$zero,0x8($a0)
-/*     3f00:	ac86011c */ 	sw	$a2,0x11c($a0)
-/*     3f04:	ac980038 */ 	sw	$t8,0x38($a0)
-/*     3f08:	ac87003c */ 	sw	$a3,0x3c($a0)
-/*     3f0c:	ac8e0004 */ 	sw	$t6,0x4($a0)
-/*     3f10:	8faf0030 */ 	lw	$t7,0x30($sp)
-/*     3f14:	3c0c7000 */ 	lui	$t4,%hi(__osCleanupThread)
-/*     3f18:	258c3ecc */ 	addiu	$t4,$t4,%lo(__osCleanupThread)
-/*     3f1c:	000f47c3 */ 	sra	$t0,$t7,0x1f
-/*     3f20:	2de10010 */ 	sltiu	$at,$t7,0x10
-/*     3f24:	01015023 */ 	subu	$t2,$t0,$at
-/*     3f28:	3c0d0400 */ 	lui	$t5,0x400
-/*     3f2c:	3c190100 */ 	lui	$t9,0x100
-/*     3f30:	000c77c3 */ 	sra	$t6,$t4,0x1f
-/*     3f34:	35adff03 */ 	ori	$t5,$t5,0xff03
-/*     3f38:	2418003f */ 	addiu	$t8,$zero,0x3f
-/*     3f3c:	37390800 */ 	ori	$t9,$t9,0x800
-/*     3f40:	24080001 */ 	addiu	$t0,$zero,0x1
-/*     3f44:	25ebfff0 */ 	addiu	$t3,$t7,-16
-/*     3f48:	00808025 */ 	or	$s0,$a0,$zero
-/*     3f4c:	ac8b00f4 */ 	sw	$t3,0xf4($a0)
-/*     3f50:	ac8a00f0 */ 	sw	$t2,0xf0($a0)
-/*     3f54:	ac8e0100 */ 	sw	$t6,0x100($a0)
-/*     3f58:	ac8c0104 */ 	sw	$t4,0x104($a0)
-/*     3f5c:	ac8d0118 */ 	sw	$t5,0x118($a0)
-/*     3f60:	ac980128 */ 	sw	$t8,0x128($a0)
-/*     3f64:	ac99012c */ 	sw	$t9,0x12c($a0)
-/*     3f68:	ac800018 */ 	sw	$zero,0x18($a0)
-/*     3f6c:	a4880010 */ 	sh	$t0,0x10($a0)
-/*     3f70:	0c01256c */ 	jal	__osDisableInt
-/*     3f74:	a4800012 */ 	sh	$zero,0x12($a0)
-/*     3f78:	3c038006 */ 	lui	$v1,%hi(__osActiveQueue)
-/*     3f7c:	2463093c */ 	addiu	$v1,$v1,%lo(__osActiveQueue)
-/*     3f80:	8c690000 */ 	lw	$t1,0x0($v1)
-/*     3f84:	00402025 */ 	or	$a0,$v0,$zero
-/*     3f88:	ae09000c */ 	sw	$t1,0xc($s0)
-/*     3f8c:	0c012588 */ 	jal	__osRestoreInt
-/*     3f90:	ac700000 */ 	sw	$s0,0x0($v1)
-/*     3f94:	8fbf001c */ 	lw	$ra,0x1c($sp)
-/*     3f98:	8fb00018 */ 	lw	$s0,0x18($sp)
-/*     3f9c:	27bd0020 */ 	addiu	$sp,$sp,0x20
-/*     3fa0:	03e00008 */ 	jr	$ra
-/*     3fa4:	00000000 */ 	nop
-/*     3fa8:	00000000 */ 	nop
-/*     3fac:	00000000 */ 	nop
-);
+void __osCleanupThread(void);
+
+void osCreateThread(OSThread *t, OSId id, void (*entry)(void *), void *arg, void *sp, OSPri p)
+{
+	register u32 saveMask;
+	OSIntMask mask;
+	t->id = id;
+	t->priority = p;
+	t->next = NULL;
+	t->queue = NULL;
+	t->context.pc = (u32)entry;
+	t->context.a0 = (u64)arg;
+	t->context.sp = (u64)sp - 16;
+	t->context.ra = (u64)__osCleanupThread;
+	mask = OS_IM_ALL;
+	t->context.sr = SR_FR | SR_IMASK | SR_EXL | SR_IE;
+	t->context.rcp = (mask & RCP_IMASK) >> RCP_IMASKSHIFT;
+	t->context.fpcsr = (u32)(FPCSR_FS | FPCSR_EV);
+	t->fp = 0;
+	t->state = OS_STATE_STOPPED;
+	t->flags = 0;
+	saveMask = __osDisableInt();
+	t->tlnext = __osActiveQueue;
+	__osActiveQueue = t;
+	__osRestoreInt(saveMask);
+}