From 1f58efa747e8cfedc3f4277bc0409ac3c348f6df Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Fri, 1 Sep 2006 11:56:12 -0700
Subject: [PATCH] Add support for the WAIT instruction.

---
 assembler/src/gram.y | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/assembler/src/gram.y b/assembler/src/gram.y
index 64b7336..9d450b2 100644
--- a/assembler/src/gram.y
+++ b/assembler/src/gram.y
@@ -116,7 +116,7 @@ void set_direct_src_operand(struct src_operand *src, struct direct_reg *reg,
 %type <instruction> instruction unaryinstruction binaryinstruction
 %type <instruction> binaryaccinstruction triinstruction sendinstruction
 %type <instruction> jumpinstruction branchloopinstruction elseinstruction
-%type <instruction> specialinstruction
+%type <instruction> syncinstruction specialinstruction
 %type <instruction> msgtarget
 %type <instruction> instoptions instoption_list predicate
 %type <program> instrseq
@@ -185,6 +185,7 @@ instruction:	unaryinstruction
 		| jumpinstruction
 		| branchloopinstruction
 		| elseinstruction
+		| syncinstruction
 		| specialinstruction
 ;
 
@@ -375,6 +376,26 @@ breakop:	BREAK | CONT | WAIT
 maskpushop:	MSAVE | PUSH
 ;
 
+syncinstruction: predicate WAIT notifyreg
+		{
+		  struct direct_reg null;
+		  struct dst_operand null_dst;
+		  struct src_operand null_src;
+
+		  null.reg_file = BRW_ARCHITECTURE_REGISTER_FILE;
+		  null.reg_nr = BRW_ARF_NULL;
+		  null.subreg_nr = 0;
+
+		  bzero(&$$, sizeof($$));
+		  $$.header.opcode = $2;
+		  set_direct_dst_operand(&null_dst, &null, BRW_REGISTER_TYPE_UD);
+		  set_instruction_dest(&$$, &null_dst);
+		  set_direct_src_operand(&null_src, &null, BRW_REGISTER_TYPE_UD);
+		  set_instruction_src0(&$$, &$3);
+		  set_instruction_src1(&$$, &null_src);
+		}
+;
+
 specialinstruction: NOP
 		{
 		  bzero(&$$, sizeof($$));
-- 
2.7.4