First commit

1 files changed, 26 insertions, 0 deletions

diff --git a/libpsn00b/psxgpu/addprim.s b/libpsn00b/psxgpu/addprim.s
new file mode 100644
index 0000000..1b66274
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+++ b/libpsn00b/psxgpu/addprim.s
@@ -0,0 +1,26 @@
+.set noreorder
+.set noat
+
+.section .text
+
+
+.global AddPrim
+.type AddPrim, @function
+AddPrim:
+
+	lw		$v0, 0($a0)				# Load OT entry
+	lw		$v1, 0($a1)				# Set packet length value (in words)
+	lui		$at, 0x00ff
+	or		$at, 0xffff
+	and		$v0, $at				# Mask off the upper 8 bits of OT entry
+	or		$v1, $v0				# OR values together
+	sw		$v1, 0($a1)				# Store new address to primitive tag
+	lw		$v0, 0($a0)				# Load OT entry
+	and		$a1, $at				# Mask off the upper 8 bits of primitive tag
+	lui		$at, 0xff00
+	and		$v0, $at				# Mask off the first 24 bits of OT entry
+	or		$v0, $a1				# OR values together
+
+	jr		$ra
+	sw		$v0, 0($a0)				# Store result to OT
+