diff --git a/src/freedreno/ir3/tests/disasm.c b/src/freedreno/ir3/tests/disasm.c
index 1069175f1d5..fc4d40571eb 100644
--- a/src/freedreno/ir3/tests/disasm.c
+++ b/src/freedreno/ir3/tests/disasm.c
@@ -125,6 +125,7 @@ static const struct test {
    INSTR_6XX(65900820_0c0aac05, "(nop3) shlg hr8.x, hc<a0.x + 5>, hr8.x, hc<a0.x + 10>"), /* not seen in blob */
    INSTR_6XX(65ae0c5c_0002a001, "(nop3) shlg r23.x, r0.y, r23.x, r0.z"), /* (nop3) shlg.b32 r23.x, (r)r0.y, (r)r23.x, r0.z */
    INSTR_6XX(64018802_0002e003, "(nop3) shrm hr0.z, (neg)hr0.w, hr0.w, hr0.z"),
+   INSTR_6XX(646084c3_1fff300a, "shrm r48.w, 10, r48.y, 4095"),
    INSTR_6XX(64818802_0002e003, "(nop3) shlm hr0.z, (neg)hr0.w, hr0.w, hr0.z"),
    INSTR_6XX(65018802_0002e003, "(nop3) shrg hr0.z, (neg)hr0.w, hr0.w, hr0.z"),
    INSTR_6XX(66018802_0002e003, "(nop3) andg hr0.z, (neg)hr0.w, hr0.w, hr0.z"),
diff --git a/src/freedreno/isa/ir3-cat3.xml b/src/freedreno/isa/ir3-cat3.xml
index 4e53472cea5..33361a569ae 100644
--- a/src/freedreno/isa/ir3-cat3.xml
+++ b/src/freedreno/isa/ir3-cat3.xml
@@ -60,7 +60,6 @@ SOFTWARE.
 			{IMMED}
 		</display>
 		<field name="IMMED" low="0" high="11" type="uint"/>
-		<pattern pos="12">1</pattern>
 	</override>
 
 	<display>
@@ -68,7 +67,8 @@ SOFTWARE.
 	</display>
 	<field name="SWIZ" low="0" high="1" type="#swiz"/>
 	<field name="CONST" low="2" high="10" type="uint"/>
-	<pattern low="11" high="12">10</pattern>
+	<pattern pos="12">1</pattern>
+	<assert pos="11">0</assert>
 	<encode>
 		<map name="CONST">src->num >> 2</map>
 		<map name="SWIZ">src->num &amp; 0x3</map>