aarch64: Allow feature flags to occupy >64 bits

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.

diff --git a/include/opcode/aarch64.h b/include/opcode/aarch64.h
index 54ac1d85fd481f004383663a61478f9d2da06380..ab42acac8c2b4f4cfb77b81791bcbd00b791aa4a 100644 (file)
--- a/include/opcode/aarch64.h
+++ b/include/opcode/aarch64.h
@@ -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))
-
-#define AARCH64_MERGE_FEATURE_SETS(TARG,F1,F2) \
-  do                                           \
-    {                                          \
-      (TARG) = (F1) | (F2);                    \
-    }                                          \
+  ((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).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, ...) \