From 7be9178c0f9b0e698a305ecc5c0c41fcc596a4fc Mon Sep 17 00:00:00 2001
From: "John Wilbert M. Villamor" <lameguy64@gmail.com>
Date: Sun, 23 Jun 2019 07:42:16 +0800
Subject: LibPSn00b officially v0.10b, added psxsio library, better DrawSync()
 and VSync(), better reference manual.

---
 libpsn00b/psxgpu/drawprim.s | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 libpsn00b/psxgpu/drawprim.s

(limited to 'libpsn00b/psxgpu/drawprim.s')

diff --git a/libpsn00b/psxgpu/drawprim.s b/libpsn00b/psxgpu/drawprim.s
new file mode 100644
index 0000000..a216720
--- /dev/null
+++ b/libpsn00b/psxgpu/drawprim.s
@@ -0,0 +1,40 @@
+.set noreorder
+
+.include "hwregs_a.h"
+
+.text
+
+.global DrawPrim
+.type DrawPrim, @function
+DrawPrim:
+
+	addiu	$sp, -8
+	sw		$ra, 0($sp)
+	sw		$s0, 4($sp)
+	
+	move	$s0, $a0			# Wait for GPU to complete
+	jal		DrawSync
+	move	$a0, $0
+	
+	lui		$a3, IOBASE
+	lui		$v0, 0x0400			# Set transfer direction to off
+	sw		$v0, GP1($a3)
+	
+	move	$a0, $s0
+	lbu		$a1, 3($a0)			# Get length of primitive packet
+	addiu	$a0, 4
+	
+.Ltransfer_loop:
+	lw		$v0, 0($a0)
+	addiu	$a0, 4
+	sw		$v0, GP0($a3)
+	bgtz	$a1, .Ltransfer_loop
+	addiu	$a1, -1
+
+	jal		DrawSync
+	move	$a0, $0
+	
+	lw		$ra, 0($sp)
+	lw		$s0, 4($sp)
+	jr		$ra
+	addiu	$sp, 8
\ No newline at end of file
-- 
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