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target/arm: Handle SME in sve_access_check 

The pseudocode for CheckSVEEnabled gains a check for Streaming
SVE mode, and for SME present but SVE absent.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220708151540.18136-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-07-08 20:45:11 +05:30 committed by Peter Maydell
parent 3d74825f4d
commit 285b1d5fce
1 changed files with 16 additions and 6 deletions
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22
target/arm/translate-a64.c
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@ -1183,21 +1183,31 @@ static bool fp_access_check(DisasContext *s)
return true;
}
/* Check that SVE access is enabled. If it is, return true.
/*
* Check that SVE access is enabled. If it is, return true.
* If not, emit code to generate an appropriate exception and return false.
* This function corresponds to CheckSVEEnabled().
*/
bool sve_access_check(DisasContext *s)
{
if (s->sve_excp_el) {
assert(!s->sve_access_checked);
s->sve_access_checked = true;
if (s->pstate_sm || !dc_isar_feature(aa64_sve, s)) {
assert(dc_isar_feature(aa64_sme, s));
if (!sme_sm_enabled_check(s)) {
goto fail_exit;
}
} else if (s->sve_excp_el) {
gen_exception_insn_el(s, s->pc_curr, EXCP_UDEF,
syn_sve_access_trap(), s->sve_excp_el);
return false;
goto fail_exit;
}
s->sve_access_checked = true;
return fp_access_check(s);
fail_exit:
/* Assert that we only raise one exception per instruction. */
assert(!s->sve_access_checked);
s->sve_access_checked = true;
return false;
}
/*