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target/arm: Consolidate cpreg updates in add_cpreg_to_hashtable 

Put most of the value writeback to the same place,
and improve the comment that goes with them.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220501055028.646596-15-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-04-30 22:49:56 -07:00 committed by Peter Maydell
parent cac65299a4
commit cc946d9669
1 changed files with 12 additions and 16 deletions
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28
target/arm/helper.c
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@ -8543,10 +8543,19 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
*r2 = *r;
r2->name = memcpy(r2 + 1, name, name_len);
/* Reset the secure state to the specific incoming state. This is
* necessary as the register may have been defined with both states.
/*
* Update fields to match the instantiation, overwiting wildcards
* such as CP_ANY, ARM_CP_STATE_BOTH, or ARM_CP_SECSTATE_BOTH.
*/
r2->cp = cp;
r2->crm = crm;
r2->opc1 = opc1;
r2->opc2 = opc2;
r2->state = state;
r2->secure = secstate;
if (opaque) {
r2->opaque = opaque;
}
if (r->bank_fieldoffsets[0] && r->bank_fieldoffsets[1]) {
/* Register is banked (using both entries in array).
@ -8587,20 +8596,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
#endif
}
}
if (opaque) {
r2->opaque = opaque;
}
/* reginfo passed to helpers is correct for the actual access,
* and is never ARM_CP_STATE_BOTH:
*/
r2->state = state;
/* Make sure reginfo passed to helpers for wildcarded regs
* has the correct crm/opc1/opc2 for this reg, not CP_ANY:
*/
r2->cp = cp;
r2->crm = crm;
r2->opc1 = opc1;
r2->opc2 = opc2;
/* By convention, for wildcarded registers only the first
* entry is used for migration; the others are marked as
* ALIAS so we don't try to transfer the register