Changeset dca5802 for libcfa/src/bits

Timestamp:

Jan 30, 2020, 1:40:05 PM (4 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

b7d6a36

Parents:

75ca7f4

Message:

Started doing some of the x86 implementations and some changes after a code review

File:

• libcfa/src/bits/defs.hfa (modified) (3 diffs)

libcfa/src/bits/defs.hfa

@@ -56 +56 @@
 // #define __CFA_NO_BIT_TEST_AND_SET__
 
-static inline bool bts(volatile unsigned long long int * target, unsigned long long int bit ) {
+#if defined( __i386 )
+static inline bool __atomic_bts(volatile unsigned long int * target, unsigned long int bit ) {
+        #if defined(__CFA_NO_BIT_TEST_AND_SET__)
+        unsigned long int mask = 1ul << bit;
+        unsigned long int ret = __atomic_fetch_or(target, mask, (int)__ATOMIC_RELAXED);
+        return (ret & mask) != 0;
+    #else
+        int result = 0;
+        asm volatile(
+            "LOCK btsl %[bit], %[target]\n\t"
+            : "=@ccc" (result)
+            : [target] "m" (*target), [bit] "r" (bit)
+        );
+        return result != 0;
+    #endif
+}
+
+static inline bool __atomic_btr(volatile unsigned long int * target, unsigned long int bit ) {
+        #if defined(__CFA_NO_BIT_TEST_AND_SET__)
+        unsigned long int mask = 1ul << bit;
+        unsigned long int ret = __atomic_fetch_and(target, ~mask, (int)__ATOMIC_RELAXED);
+        return (ret & mask) != 0;
+        #else
+        int result = 0;
+        asm volatile(
+            "LOCK btrl %[bit], %[target]\n\t"
+            :"=@ccc" (result)
+            : [target] "m" (*target), [bit] "r" (bit)
+        );
+        return result != 0;
+    #endif
+}
+#elif defined( __x86_64 )
+static inline bool __atomic_bts(volatile unsigned long long int * target, unsigned long long int bit ) {
         #if defined(__CFA_NO_BIT_TEST_AND_SET__)
         unsigned long long int mask = 1ul << bit;
@@ -72 +105 @@
 }
 
-static inline bool btr(volatile unsigned long long int * target, unsigned long long int bit ) {
+static inline bool __atomic_btr(volatile unsigned long long int * target, unsigned long long int bit ) {
         #if defined(__CFA_NO_BIT_TEST_AND_SET__)
         unsigned long long int mask = 1ul << bit;
@@ -87 +120 @@
     #endif
 }
+#elif defined( __ARM_ARCH )
+    #error __atomic_bts and __atomic_btr not implemented for arm
+#else
+        #error uknown hardware architecture
+#endif