From 6bea504b9407a1ce8ac3f6909f4e728be5b18764 Mon Sep 17 00:00:00 2001
From: Adam Langley <agl@golang.org>
Date: Fri, 21 Jun 2013 15:17:13 -0400
Subject: [PATCH] cmd/6a, cmd/6l: add PCLMULQDQ instruction.

This Intel instruction implements multiplication in binary fields.

R=golang-dev, minux.ma, dave, rsc
CC=golang-dev
https://golang.org/cl/10428043
---
 src/cmd/6a/lex.c   | 1 +
 src/cmd/6l/6.out.h | 2 ++
 src/cmd/6l/optab.c | 2 ++
 3 files changed, 5 insertions(+)

diff --git a/src/cmd/6a/lex.c b/src/cmd/6a/lex.c
index c969e98e5d..89143e7894 100644
--- a/src/cmd/6a/lex.c
+++ b/src/cmd/6a/lex.c
@@ -1019,6 +1019,7 @@ struct
 	"AESKEYGENASSIST", LTYPEX, AAESKEYGENASSIST,
 	"PSHUFD",	LTYPEX, APSHUFD,
 	"USEFIELD",	LTYPEN, AUSEFIELD,
+	"PCLMULQDQ",	LTYPEX, APCLMULQDQ,
 
 	0
 };
diff --git a/src/cmd/6l/6.out.h b/src/cmd/6l/6.out.h
index e0aeafa94f..c4be74f135 100644
--- a/src/cmd/6l/6.out.h
+++ b/src/cmd/6l/6.out.h
@@ -766,6 +766,8 @@ enum	as
 	ANPTRS,
 	APTRS,
 
+	APCLMULQDQ,
+
 	ALAST
 };
 
diff --git a/src/cmd/6l/optab.c b/src/cmd/6l/optab.c
index 356910734a..5080dd7e90 100644
--- a/src/cmd/6l/optab.c
+++ b/src/cmd/6l/optab.c
@@ -1344,6 +1344,8 @@ Optab optab[] =
 	{ ANPTRS },
 	{ APTRS },
 
+	{ APCLMULQDQ,	yxshuf,	Pq, 0x3a,0x44,0 },
+
 	{ AEND },
 	0
 };