diff 178cd4d1139b8ba928ddac19578643637a953a93 uncommitted
--- a/sys/src/cmd/9a/lex.c
+++ b/sys/src/cmd/9a/lex.c
@@ -476,8 +476,11 @@
 	"FCTIDZCC",	LFCONV,	AFCTIDZCC,
 	"FCFID",	LFCONV,	AFCFID,
 	"FCFIDCC",	LFCONV,	AFCFIDCC,
-	"LDAR", LXLD, ALDAR,
-	"MOVD",	LMOVW,	AMOVD,
+	"LBAR",		LXLD,	ALBAR,
+	"LHAR",		LXLD,	ALHAR,
+	"LDAR",		LXLD,	ALDAR,
+	"LQAR",		LXLD,	ALQAR,
+	"MOVD",		LMOVW,	AMOVD,
 	"MOVDU",	LMOVW,	AMOVDU,
 	"MOVWZ",	LMOVW,	AMOVWZ,
 	"MOVWZU",	LMOVW,	AMOVWZU,
@@ -510,7 +513,10 @@
 	"SRAD",	LSHW,	ASRAD,
 	"SRADCC",	LSHW,	ASRADCC,
 	"SRDCC",	LSHW,	ASRDCC,
+	"STBCCC",	LXST,	ASTBCCC,
+	"STHCCC",	LXST,	ASTHCCC,
 	"STDCCC",	LXST,	ASTDCCC,
+	"STQCCC",	LXST,	ASTQCCC,
 	"TD",	LADDW,	ATD,
 
 	/* pseudo instructions */
--- a/sys/src/cmd/9c/9.out.h
+++ b/sys/src/cmd/9c/9.out.h
@@ -362,6 +362,12 @@
 	AHRFID,
 
 	ALWSYNC,
+	ALBAR,
+	ALHAR,
+	ALQAR,
+	ASTBCCC,
+	ASTHCCC,
+	ASTQCCC,
 
 	ALAST
 };
--- a/sys/src/cmd/9l/asmout.c
+++ b/sys/src/cmd/9l/asmout.c
@@ -1452,10 +1452,14 @@
 	case AMOVHZ:	return OPVCC(31,279,0,0);	/* lhzx */
 	case AMOVHZU:	return OPVCC(31,311,0,0);	/* lhzux */
 	case AECIWX:	return OPVCC(31,310,0,0);	/* eciwx */
+	case ALHAR:	return OPVCC(31,116,0,0);	/* lharx */
 	case ALWAR:	return OPVCC(31,20,0,0);	/* lwarx */
+	case ALDAR:	return OPVCC(31,84,0,0);	/* ldarx */
+	case ALQAR:	return OPVCC(31,276,0,0);	/* lqarx */
 	case ALSW:	return OPVCC(31,533,0,0);	/* lswx */
 	case AMOVD:	return OPVCC(31,21,0,0);	/* ldx */
 	case AMOVDU:	return OPVCC(31,53,0,0);	/* ldux */
+	case ALBAR:	return OPVCC(31,52,0,0);	/* lbarx */
 	}
 	diag("bad loadx opcode %A", a);
 	return 0;
@@ -1519,8 +1523,11 @@
 	case AMOVWU:	return OPVCC(31,183,0,0);	/* stwux */
 	case ASTSW:	return OPVCC(31,661,0,0);	/* stswx */
 	case AMOVWBR:	return OPVCC(31,662,0,0);	/* stwbrx */
+	case ASTBCCC:	return OPVCC(31,694,0,0);	/* stbcx */
+	case ASTHCCC:	return OPVCC(31,726,0,0);	/* sthcx */
 	case ASTWCCC:	return OPVCC(31,150,0,1);	/* stwcx. */
 	case ASTDCCC:	return OPVCC(31,214,0,1);	/* stwdx. */
+	case ASTQCCC:	return OPVCC(31,182,0,1);	/* stqcx. */
 	case AECOWX:	return OPVCC(31,438,0,0);	/* ecowx */
 	case AMOVD:	return OPVCC(31,149,0,0);	/* stdx */
 	case AMOVDU:	return OPVCC(31,181,0,0);	/* stdux */
--- a/sys/src