From: Brian Cain <bcain@quicinc.com>

siad is the 'Set interrupt auto disable' instruction.

Reviewed-by: Taylor Simpson <ltaylorsimpson@gmail.com>
Signed-off-by: Brian Cain <brian.cain@oss.qualcomm.com>
---
 target/hexagon/op_helper.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/target/hexagon/op_helper.c b/target/hexagon/op_helper.c
index c5c638c132e..dff6092dd8a 100644
--- a/target/hexagon/op_helper.c
+++ b/target/hexagon/op_helper.c
@@ -1433,7 +1433,21 @@ void HELPER(ciad)(CPUHexagonState *env, uint32_t mask)
 
 void HELPER(siad)(CPUHexagonState *env, uint32_t mask)
 {
-    g_assert_not_reached();
+    uint32_t ipendad;
+    uint32_t iad;
+
+    BQL_LOCK_GUARD();
+    HexagonCPU *cpu = env_archcpu(env);
+    ipendad = cpu->globalregs ?
+        hexagon_globalreg_read(cpu->globalregs, HEX_SREG_IPENDAD,
+                               env->threadId) : 0;
+    iad = fGET_FIELD(ipendad, IPENDAD_IAD);
+    fSET_FIELD(ipendad, IPENDAD_IAD, iad | mask);
+    if (cpu->globalregs) {
+        hexagon_globalreg_write(cpu->globalregs, HEX_SREG_IPENDAD,
+                                ipendad, env->threadId);
+    }
+    hex_interrupt_update(env);
 }
 
 void HELPER(swi)(CPUHexagonState *env, uint32_t mask)
-- 
2.34.1