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>
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@ -1183,21 +1183,31 @@ static bool fp_access_check(DisasContext *s)
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return true;
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}
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/* Check that SVE access is enabled. If it is, return true.
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/*
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* Check that SVE access is enabled. If it is, return true.
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* If not, emit code to generate an appropriate exception and return false.
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* This function corresponds to CheckSVEEnabled().
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*/
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bool sve_access_check(DisasContext *s)
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{
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if (s->sve_excp_el) {
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assert(!s->sve_access_checked);
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s->sve_access_checked = true;
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if (s->pstate_sm || !dc_isar_feature(aa64_sve, s)) {
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assert(dc_isar_feature(aa64_sme, s));
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if (!sme_sm_enabled_check(s)) {
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goto fail_exit;
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}
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} else if (s->sve_excp_el) {
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gen_exception_insn_el(s, s->pc_curr, EXCP_UDEF,
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syn_sve_access_trap(), s->sve_excp_el);
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return false;
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goto fail_exit;
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}
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s->sve_access_checked = true;
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return fp_access_check(s);
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fail_exit:
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/* Assert that we only raise one exception per instruction. */
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assert(!s->sve_access_checked);
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s->sve_access_checked = true;
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return false;
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}
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/*
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