1 files changed, 37 insertions, 0 deletions
diff --git a/src/shaders/h264/mc/load_Intra_Ref_Y.asm b/src/shaders/h264/mc/load_Intra_Ref_Y.asm
new file mode 100644
index 0000000..de8ec49
--- /dev/null
+++ b/src/shaders/h264/mc/load_Intra_Ref_Y.asm
@@ -0,0 +1,37 @@
+/*
+ * Load all reference Y samples from neighboring macroblocks
+ * Copyright © <2010>, Intel Corporation.
+ *
+ * This program is licensed under the terms and conditions of the
+ * Eclipse Public License (EPL), version 1.0.  The full text of the EPL is at
+ * http://www.opensource.org/licenses/eclipse-1.0.php.
+ *
+ */
+#if !defined(__LOAD_INTRA_REF_Y__)		// Make sure this is only included once
+#define __LOAD_INTRA_REF_Y__
+
+// Module name: load_Intra_Ref_Y.asm
+//
+// Load all reference Y samples from neighboring macroblocks
+//
+load_Intra_Ref_Y:
+//	shl (2) I_ORIX<1>:uw	ORIX<2;2,1>:ub	4:w		// Convert MB origin to pixel unit
+
+// First load top 28x1 row reference samples
+// 4 from macroblock D (actually use 1), 16 from macroblock B, and 8 from macroblock C
+//
+    add	(2)	MSGSRC.0<1>:d	I_ORIX<2;2,1>:w	TOP_REF_OFFSET<2;2,1>:b	{NoDDClr}	// Reference samples positioned at (-4, -1)
+    mov (1)	MSGSRC.2:ud		0x0000001B:ud {NoDDChk}								// Block width and height (28x1)
+    add (1)	MSGDSC	REG_MBAFF_FIELD<0;1,0>:uw	RESP_LEN(1)+DWBRMSGDSC_RC+DESTY:ud  // Set message descriptor
+    send (8)	INTRA_REF_TOP_D(0)	MSGHDRY0	MSGSRC<8;8,1>:ud	DAPREAD	MSGDSC
+
+// Then load left 4x16 reference samples (actually use 1x16 column)
+//
+    add	(1)	MSGSRC.1<1>:d	MSGSRC.1<0;1,0>:d	1:w {NoDDClr}	// Reference samples positioned next row
+    mov (1)	MSGSRC.2:ud		0x00F0003:ud	{NoDDChk}			// Block width and height (4x16)
+    add (1)	MSGDSC			MSGDSC	RESP_LEN(1):ud	// Need to read 1 more GRF register
+    send (8)	INTRA_REF_LEFT_D(0)	MSGHDRY1	MSGSRC<8;8,1>:ud	DAPREAD	MSGDSC
+
+	RETURN
+// End of load_Intra_Ref_Y
+#endif	// !defined(__LOAD_INTRA_REF_Y__)