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target-arm: implement setend

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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>
This commit is contained in:
Paolo Bonzini 2016-03-04 11:30:21 +00:00 committed by Peter Maydell
parent 91cca2cda9
commit 9886ecdf31
3 changed files with 12 additions and 8 deletions
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1
target-arm/helper.h
View file

@ -48,6 +48,7 @@ DEF_HELPER_FLAGS_3(sel_flags, TCG_CALL_NO_RWG_SE,
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)

5
target-arm/op_helper.c
View file

@ -296,6 +296,11 @@ uint32_t HELPER(usat16)(CPUARMState *env, uint32_t x, uint32_t shift)
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.

14
target-arm/translate.c
View file

@ -7786,10 +7786,9 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
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 @@ static void disas_thumb_insn(CPUARMState *env, DisasContext *s)
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: