Changeset 7768b8d for libcfa/src/bits

Timestamp:

Nov 26, 2019, 3:19:20 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:

30763fd

Parents:

21184e3

Message:

First step at adding the new ready queue to Cforall

File:

• libcfa/src/bits/defs.hfa (modified) (1 diff)

libcfa/src/bits/defs.hfa

@@ -53 +53 @@
     return ( (unsigned long long)lo)|( ((unsigned long long)hi)<<32 );
 }
+
+#define __CFA_NO_BIT_TEST_AND_SET__
+
+static inline bool 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;
+        unsigned long long int ret = __atomic_fetch_or(target, mask, (int)__ATOMIC_RELAXED);
+        return (ret & mask) != 0;
+    #else
+        int result = 0;
+        asm volatile(
+            "LOCK btsq %[bit], %[target]\n\t"
+            :"=@ccc" (result)
+            : [target] "m" (*target), [bit] "r" (bit)
+        );
+        return result != 0;
+    #endif
+}
+
+static inline bool 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;
+        unsigned long long int ret = __atomic_fetch_and(target, ~mask, (int)__ATOMIC_RELAXED);
+        return (ret & mask) != 0;
+        #else
+        int result = 0;
+        asm volatile(
+            "LOCK btrq %[bit], %[target]\n\t"
+            :"=@ccc" (result)
+            : [target] "m" (*target), [bit] "r" (bit)
+        );
+        return result != 0;
+    #endif
+}