target/m68k: increase size of m68k CPU features from uint32_t to uint64_t

There are already 32 feature bits in use, so change the size of the m68k
CPU features to uint64_t (along with the associated m68k_feature()
functions) to allow up to 64 feature bits to be used.

At the same time make use of the BIT_ULL() macro when reading/writing
the CPU feature bits to improve readability, and also update m68k_feature()
to return a bool rather than an int.

Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220925134804.139706-2-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>

diff --git a/target/m68k/cpu.c b/target/m68k/cpu.c
index f681be3a2a58961e5810a2ce108638aff0ad4ae9..8d23c72056fd2107cf75c4e3e6c757ae959ef99e 100644 (file)
--- a/target/m68k/cpu.c
+++ b/target/m68k/cpu.c
@@ -38,12 +38,12 @@ static bool m68k_cpu_has_work(CPUState *cs)
 
 static void m68k_set_feature(CPUM68KState *env, int feature)
 {
-    env->features |= (1u << feature);
+    env->features |= BIT_ULL(feature);
 }
 
 static void m68k_unset_feature(CPUM68KState *env, int feature)
 {
-    env->features &= (-1u - (1u << feature));
+    env->features &= ~BIT_ULL(feature);
 }
 
 static void m68k_cpu_reset(DeviceState *dev)

diff --git a/target/m68k/cpu.h b/target/m68k/cpu.h
index 67b6c12c2892a51a6e3729df80388de91c5ce2f0..f5c6e95cb44a23d97a47fbbc82cee80805ea2f6f 100644 (file)
--- a/target/m68k/cpu.h
+++ b/target/m68k/cpu.h
@@ -154,7 +154,7 @@ typedef struct CPUArchState {
     struct {} end_reset_fields;
 
     /* Fields from here on are preserved across CPU reset. */
-    uint32_t features;
+    uint64_t features;
 } CPUM68KState;
 
 /*
@@ -539,9 +539,9 @@ enum m68k_features {
     M68K_FEATURE_TRAPCC,
 };
 
-static inline int m68k_feature(CPUM68KState *env, int feature)
+static inline bool m68k_feature(CPUM68KState *env, int feature)
 {
-    return (env->features & (1u << feature)) != 0;
+    return (env->features & BIT_ULL(feature)) != 0;
 }
 
 void m68k_cpu_list(void);