From 356ce76d447a8a8707e399703002988f711bd0f3 Mon Sep 17 00:00:00 2001
From: Eric Anholt <eric@anholt.net>
Date: Thu, 31 Aug 2006 10:27:48 -0700
Subject: [PATCH] Add a rule for the ELSE instruction.

Untested.
---
 assembler/src/gram.y | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

diff --git a/assembler/src/gram.y b/assembler/src/gram.y
index 3fcfa52a..f3fbed46 100644
--- a/assembler/src/gram.y
+++ b/assembler/src/gram.y
@@ -115,7 +115,8 @@ 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 specialinstruction
+%type <instruction> jumpinstruction branchloopinstruction elseinstruction
+%type <instruction> specialinstruction
 %type <instruction> msgtarget
 %type <instruction> instoptions instoption_list predicate
 %type <program> instrseq
@@ -183,6 +184,7 @@ instruction:	unaryinstruction
 		| triinstruction
 		| jumpinstruction
 		| branchloopinstruction
+		| elseinstruction
 		| specialinstruction
 ;
 
@@ -339,6 +341,28 @@ branchloopinstruction:
 branchloopop:	IF | IFF | WHILE
 ;
 
+elseinstruction: ELSE relativelocation
+		{
+		  struct direct_reg dst;
+		  struct dst_operand ip_dst;
+		  struct src_operand ip_src;
+
+		  /* The jump instruction requires that the IP register
+		   * be the destination and first source operand, while the
+		   * offset is the second source operand.  The offset is added
+		   * to the IP pre-increment.
+		   */
+
+		  bzero(&$$, sizeof($$));
+		  $$.header.opcode = $1;
+		  set_direct_dst_operand(&ip_dst, &dst, BRW_REGISTER_TYPE_UD);
+		  set_instruction_dest(&$$, &ip_dst);
+		  set_direct_src_operand(&ip_src, &dst, BRW_REGISTER_TYPE_UD);
+		  set_instruction_src0(&$$, &ip_src);
+		  set_instruction_src1(&$$, &$2);
+		}
+;
+
 breakop:	BREAK | CONT | WAIT
 ;