From: James Hogan <james.hogan@mips.com>

We shouldn't clear M16 mode when entering an interrupt on nanoMIPS,
otherwise we'll start interpreting the code as normal MIPS code.

Signed-off-by: James Hogan <james.hogan@mips.com>
Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
---
 target/mips/helper.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/mips/helper.c b/target/mips/helper.c
index b429671..0c15e65 100644
--- a/target/mips/helper.c
+++ b/target/mips/helper.c
@@ -671,6 +671,9 @@ target_ulong exception_resume_pc (CPUMIPSState *env)
 #if !defined(CONFIG_USER_ONLY)
 static void set_hflags_for_handler (CPUMIPSState *env)
 {
+    if (env->insn_flags & ISA_NANOMIPS32) {
+        return;
+    }
     /* Exception handlers are entered in 32-bit mode.  */
     env->hflags &= ~(MIPS_HFLAG_M16);
     /* ...except that microMIPS lets you choose.  */
-- 
2.7.4

> From: Aleksandar Markovic <aleksandar.markovic@rt-rk.com>
> Sent: Monday, August 13, 2018 7:53 PM
> 
> Subject: [PATCH v8 55/87] target/mips: Adjust set_hflags_for_handler() for nanoMIPS
> 
> From: James Hogan <james.hogan@mips.com>
> 
> We shouldn't clear M16 mode when entering an interrupt on nanoMIPS,
> otherwise we'll start interpreting the code as normal MIPS code.
> 
> Signed-off-by: James Hogan <james.hogan@mips.com>
> Signed-off-by: Yongbok Kim <yongbok.kim@mips.com>
> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
> Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
> ---
> target/mips/helper.c | 3 +++
>  1 file changed, 3 insertions(+)

This code segment should be re-thought and redesigned in future cleanups. For now:

Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>