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aarch64: Allow feature flags to occupy >64 bits

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Following on from the previous patch to make the feature macros take
a word number, this one increases the number of flag words from 1 to 2.

The patch uses some dummy features to push the number of features
over 64.  The intention is that these should be reused by real
features rather than kept as-is.
This commit is contained in:
Richard Sandiford 2023-09-26 15:01:21 +01:00
parent 4abb672ac1
commit d86dbbea8a
1 changed files with 38 additions and 22 deletions
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60
include/opcode/aarch64.h
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@ -158,7 +158,11 @@ enum aarch64_feature_bit {
/* Common Short Sequence Compression instructions. */
AARCH64_FEATURE_CSSC,
/* SME2. */
AARCH64_FEATURE_SME2
AARCH64_FEATURE_SME2,
DUMMY1,
DUMMY2,
DUMMY3,
AARCH64_NUM_FEATURES
};
/* These macros take an initial argument X that gives the index into
@ -257,50 +261,61 @@ enum aarch64_feature_bit {
#define AARCH64_ARCH_NONE(X) 0
/* CPU-specific features. */
typedef unsigned long long aarch64_feature_set;
typedef struct {
uint64_t flags[(AARCH64_NUM_FEATURES + 63) / 64];
} aarch64_feature_set;
#define AARCH64_CPU_HAS_FEATURE(CPU,FEAT) \
((~(CPU) & AARCH64_FEATBIT (0, FEAT)) == 0)
((~(CPU).flags[0] & AARCH64_FEATBIT (0, FEAT)) == 0 \
&& (~(CPU).flags[1] & AARCH64_FEATBIT (1, FEAT)) == 0)
#define AARCH64_CPU_HAS_ALL_FEATURES(CPU,FEAT) \
((~(CPU) & (FEAT)) == 0)
((~(CPU).flags[0] & (FEAT).flags[0]) == 0 \
&& (~(CPU).flags[1] & (FEAT).flags[1]) == 0)
#define AARCH64_CPU_HAS_ANY_FEATURES(CPU,FEAT) \
(((CPU) & (FEAT)) != 0)
(((CPU).flags[0] & (FEAT).flags[0]) != 0 \
|| ((CPU).flags[1] & (FEAT).flags[1]) != 0)
#define AARCH64_SET_FEATURE(DEST, FEAT) \
((DEST) = FEAT (0))
((DEST).flags[0] = FEAT (0), \
(DEST).flags[1] = FEAT (1))
#define AARCH64_CLEAR_FEATURE(DEST, SRC, FEAT) \
((DEST) = (SRC) & ~AARCH64_FEATBIT (0, FEAT))
((DEST).flags[0] = (SRC).flags[0] & ~AARCH64_FEATBIT (0, FEAT), \
(DEST).flags[1] = (SRC).flags[1] & ~AARCH64_FEATBIT (1, FEAT))
#define AARCH64_MERGE_FEATURE_SETS(TARG,F1,F2) \
do \
{ \
(TARG) = (F1) | (F2); \
} \
#define AARCH64_MERGE_FEATURE_SETS(TARG,F1,F2) \
do \
{ \
(TARG).flags[0] = (F1).flags[0] | (F2).flags[0]; \
(TARG).flags[1] = (F1).flags[1] | (F2).flags[1]; \
} \
while (0)
#define AARCH64_CLEAR_FEATURES(TARG,F1,F2) \
do \
{ \
(TARG) = (F1) &~ (F2); \
} \
#define AARCH64_CLEAR_FEATURES(TARG,F1,F2) \
do \
{ \
(TARG).flags[0] = (F1).flags[0] &~ (F2).flags[0]; \
(TARG).flags[1] = (F1).flags[1] &~ (F2).flags[1]; \
} \
while (0)
/* aarch64_feature_set initializers for no features and all features,
respectively. */
#define AARCH64_NO_FEATURES 0
#define AARCH64_ALL_FEATURES -1
#define AARCH64_NO_FEATURES { { 0, 0 } }
#define AARCH64_ALL_FEATURES { { -1, -1 } }
/* An aarch64_feature_set initializer for a single feature,
AARCH64_FEATURE_<FEAT>. */
#define AARCH64_FEATURE(FEAT) AARCH64_FEATBIT (0, FEAT)
#define AARCH64_FEATURE(FEAT) \
{ { AARCH64_FEATBIT (0, FEAT), AARCH64_FEATBIT (1, FEAT) } }
/* An aarch64_feature_set initializer for a specific architecture version,
including all the features that are enabled by default for that architecture
version. */
#define AARCH64_ARCH_FEATURES(ARCH) AARCH64_ARCH_##ARCH (0)
#define AARCH64_ARCH_FEATURES(ARCH) \
{ { AARCH64_ARCH_##ARCH (0), AARCH64_ARCH_##ARCH (1) } }
/* Used by AARCH64_CPU_FEATURES. */
#define AARCH64_OR_FEATURES_1(X, ARCH, F1) \
@ -325,7 +340,8 @@ typedef unsigned long long aarch64_feature_set;
/* An aarch64_feature_set initializer for a CPU that implements architecture
version ARCH, and additionally provides the N features listed in "...". */
#define AARCH64_CPU_FEATURES(ARCH, N, ...) \
AARCH64_OR_FEATURES_##N (0, ARCH, __VA_ARGS__)
{ { AARCH64_OR_FEATURES_##N (0, ARCH, __VA_ARGS__), \
AARCH64_OR_FEATURES_##N (1, ARCH, __VA_ARGS__) } }
/* An aarch64_feature_set initializer for the N features listed in "...". */
#define AARCH64_FEATURES(N, ...) \