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target/arm: Reorg ARMCPRegInfo type field bits

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Instead of defining ARM_CP_FLAG_MASK to remove flags,
define ARM_CP_SPECIAL_MASK to isolate special cases.
Sort the specials to the low bits. Use an enum.

Split the large comment block so as to document each
value separately.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220501055028.646596-6-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2022-04-30 22:49:47 -07:00 • committed by Peter Maydell
parent 10b0220e45
commit 87c3f0f2f7
5 changed files with 92 additions and 58 deletions
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6
target/arm/translate-a64.c
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@ -1833,7 +1833,9 @@ static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
}
/* Handle special cases first */
switch (ri->type & ~(ARM_CP_FLAG_MASK & ~ARM_CP_SPECIAL)) {
switch (ri->type & ARM_CP_SPECIAL_MASK) {
case 0:
break;
case ARM_CP_NOP:
return;
case ARM_CP_NZCV:
@ -1908,7 +1910,7 @@ static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
}
return;
default:
break;
g_assert_not_reached();
}
if ((ri->type & ARM_CP_FPU) && !fp_access_check(s)) {
return;