target-arm: implement setend
Since this is not a high-performance path, just use a helper to
flip the E bit and force a lookup in the hash table since the
flags have changed.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/target-arm/helper.h b/target-arm/helper.h
index ea13202..e3d09d9 100644
--- a/target-arm/helper.h
+++ b/target-arm/helper.h
@@ -48,6 +48,7 @@
i32, i32, i32, i32)
DEF_HELPER_2(exception_internal, void, env, i32)
DEF_HELPER_4(exception_with_syndrome, void, env, i32, i32, i32)
+DEF_HELPER_1(setend, void, env)
DEF_HELPER_1(wfi, void, env)
DEF_HELPER_1(wfe, void, env)
DEF_HELPER_1(yield, void, env)
diff --git a/target-arm/op_helper.c b/target-arm/op_helper.c
index 4881e34..92fde0a 100644
--- a/target-arm/op_helper.c
+++ b/target-arm/op_helper.c
@@ -296,6 +296,11 @@
return res;
}
+void HELPER(setend)(CPUARMState *env)
+{
+ env->uncached_cpsr ^= CPSR_E;
+}
+
/* Function checks whether WFx (WFI/WFE) instructions are set up to be trapped.
* The function returns the target EL (1-3) if the instruction is to be trapped;
* otherwise it returns 0 indicating it is not trapped.
diff --git a/target-arm/translate.c b/target-arm/translate.c
index c430fec..c23ddb3 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -7786,10 +7786,9 @@
if ((insn & 0x0ffffdff) == 0x01010000) {
ARCH(6);
/* setend */
- if (((insn >> 9) & 1) != bswap_code(s->sctlr_b)) {
- /* Dynamic endianness switching not implemented. */
- qemu_log_mask(LOG_UNIMP, "arm: unimplemented setend\n");
- goto illegal_op;
+ if (((insn >> 9) & 1) != !!(s->be_data == MO_BE)) {
+ gen_helper_setend(cpu_env);
+ s->is_jmp = DISAS_UPDATE;
}
return;
} else if ((insn & 0x0fffff00) == 0x057ff000) {
@@ -11121,10 +11120,9 @@
case 2:
/* setend */
ARCH(6);
- if (((insn >> 3) & 1) != bswap_code(s->sctlr_b)) {
- /* Dynamic endianness switching not implemented. */
- qemu_log_mask(LOG_UNIMP, "arm: unimplemented setend\n");
- goto illegal_op;
+ if (((insn >> 3) & 1) != !!(s->be_data == MO_BE)) {
+ gen_helper_setend(cpu_env);
+ s->is_jmp = DISAS_UPDATE;
}
break;
case 3:
