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target/arm: Add isar feature check functions for MVE 

Add the isar feature check functions we will need for v8.1M MVE:
 * a check for MVE present: this corresponds to the pseudocode's
   CheckDecodeFaults(ExtType_Mve)
 * a check for the optional floating-point part of MVE: this
   corresponds to CheckDecodeFaults(ExtType_MveFp)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210520152840.24453-2-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2021-05-20 16:28:32 +01:00
parent a97978bcc2
commit 7df6a1ffdb
1 changed files with 22 additions and 0 deletions
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22
target/arm/cpu.h
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@ -3817,6 +3817,28 @@ static inline bool isar_feature_aa32_fp16_arith(const ARMISARegisters *id)
}
}
static inline bool isar_feature_aa32_mve(const ARMISARegisters *id)
{
/*
* Return true if MVE is supported (either integer or floating point).
* We must check for M-profile as the MVFR1 field means something
* else for A-profile.
*/
return isar_feature_aa32_mprofile(id) &&
FIELD_EX32(id->mvfr1, MVFR1, MVE) > 0;
}
static inline bool isar_feature_aa32_mve_fp(const ARMISARegisters *id)
{
/*
* Return true if MVE is supported (either integer or floating point).
* We must check for M-profile as the MVFR1 field means something
* else for A-profile.
*/
return isar_feature_aa32_mprofile(id) &&
FIELD_EX32(id->mvfr1, MVFR1, MVE) >= 2;
}
static inline bool isar_feature_aa32_vfp_simd(const ARMISARegisters *id)
{
/*