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-rw-r--r--target/mips/helper.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/target/mips/helper.c b/target/mips/helper.c
index e215af9a41..f0c268b83c 100644
--- a/target/mips/helper.c
+++ b/target/mips/helper.c
@@ -682,6 +682,22 @@ static void set_hflags_for_handler (CPUMIPSState *env)
static inline void set_badinstr_registers(CPUMIPSState *env)
{
+ if (env->insn_flags & ISA_NANOMIPS32) {
+ if (env->CP0_Config3 & (1 << CP0C3_BI)) {
+ uint32_t instr = (cpu_lduw_code(env, env->active_tc.PC)) << 16;
+ if ((instr & 0x10000000) == 0) {
+ instr |= cpu_lduw_code(env, env->active_tc.PC + 2);
+ }
+ env->CP0_BadInstr = instr;
+
+ if ((instr & 0xFC000000) == 0x60000000) {
+ instr = cpu_lduw_code(env, env->active_tc.PC + 4) << 16;
+ env->CP0_BadInstrX = instr;
+ }
+ }
+ return;
+ }
+
if (env->hflags & MIPS_HFLAG_M16) {
/* TODO: add BadInstr support for microMIPS */
return;