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target/s390x: Implement EXECUTE via new TranslationBlock

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Previously, helper_ex would construct the insn and then implement
the insn via direct calls other helpers.  This was sufficient to
boot Linux but that is all.

It is easy enough to go the whole nine yards by stashing state for
EXECUTE within the cpu, and then rely on a new TB to be created
that properly and completely interprets the insn.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2017-05-21 09:50:00 -07:00
parent 06fc03486c
commit 303c681a8f
5 changed files with 85 additions and 141 deletions
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5
target/s390x/helper.c
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@ -642,6 +642,11 @@ bool s390_cpu_exec_interrupt(CPUState *cs, int interrupt_request)
S390CPU *cpu = S390_CPU(cs);
CPUS390XState *env = &cpu->env;
if (env->ex_value) {
/* Execution of the target insn is indivisible from
the parent EXECUTE insn. */
return false;
}
if (env->psw.mask & PSW_MASK_EXT) {
s390_cpu_do_interrupt(cs);
return true;