Changeset 52345 in vbox for trunk/include

Timestamp:

Aug 11, 2014 3:29:24 PM (10 years ago)

Author:

vboxsync

Message:

Runtime: Implemented ASMAtomicUo[Inc|Dec]U32() with updated testcase. Also added missing testcase for
ASMAtomicUo[And|Or]U32().

Location:

trunk/include/iprt

Files:

• asm.h (modified) (1 diff)
• mangling.h (modified) (1 diff)

trunk/include/iprt/asm.h

@@ -3266 +3266 @@
 
 
+/**
+ * Atomically increment an unsigned 32-bit value, unordered.
+ *
+ * @returns the new value.
+ * @param   pu32   Pointer to the variable to increment.
+ */
+#if RT_INLINE_ASM_EXTERNAL
+DECLASM(uint32_t) ASMAtomicUoIncU32(uint32_t volatile *pu32);
+#else
+DECLINLINE(uint32_t) ASMAtomicUoIncU32(uint32_t volatile *pu32)
+{
+    uint32_t u32;
+# if RT_INLINE_ASM_GNU_STYLE
+    __asm__ __volatile__("xaddl %0, %1\n\t"
+                         : "=r" (u32),
+                           "=m" (*pu32)
+                         : "0" (1),
+                           "m" (*pu32)
+                         : "memory");
+    return u32 + 1;
+# else
+    __asm
+    {
+        mov     eax, 1
+#  ifdef RT_ARCH_AMD64
+        xadd    [rdx], eax
+#  else
+        xadd    [edx], eax
+#  endif
+        mov     u32, eax
+    }
+    return u32 + 1;
+# endif
+}
+#endif
+
+
+/**
+ * Atomically decrement an unsigned 32-bit value, unordered.
+ *
+ * @returns the new value.
+ * @param   pu32   Pointer to the variable to decrement.
+ */
+#if RT_INLINE_ASM_EXTERNAL
+DECLASM(uint32_t) ASMAtomicUoDecU32(uint32_t volatile *pu32);
+#else
+DECLINLINE(uint32_t) ASMAtomicUoDecU32(uint32_t volatile *pu32)
+{
+    uint32_t u32;
+# if RT_INLINE_ASM_GNU_STYLE
+    __asm__ __volatile__("lock; xaddl %0, %1\n\t"
+                         : "=r" (u32),
+                           "=m" (*pu32)
+                         : "0" (-1),
+                           "m" (*pu32)
+                         : "memory");
+    return u32 - 1;
+# else
+    __asm
+    {
+        mov     eax, -1
+#  ifdef RT_ARCH_AMD64
+        mov     rdx, [pu32]
+        xadd    [rdx], eax
+#  else
+        mov     edx, [pu32]
+        xadd    [edx], eax
+#  endif
+        mov     u32, eax
+    }
+    return u32 - 1;
+# endif
+}
+#endif
+
 
 /** @def RT_ASM_PAGE_SIZE

trunk/include/iprt/mangling.h

@@ -54 +54 @@
 # define ASMAtomicReadU64                               RT_MANGLER(ASMAtomicReadU64)        /* not-some-systems... */
 # define ASMAtomicReadU64_EndProc                       RT_MANGLER(ASMAtomicReadU64_EndProc)
+# define ASMAtomicUoAndU32                              RT_MANGLER(ASMAtomicUoAndU32)       /* not-some-systems... */
+# define ASMAtomicUoAndU32_EndProc                      RT_MANGLER(ASMAtomicUoAndU32_EndProc)
+# define ASMAtomicUoAndU64                              RT_MANGLER(ASMAtomicUoAndU64)       /* not-some-systems... */
+# define ASMAtomicUoAndU64_EndProc                      RT_MANGLER(ASMAtomicUoAndU64_EndProc)
+# define ASMAtomicUoDecU32                              RT_MANGLER(ASMAtomicUoDecU32)       /* not-some-systems... */
+# define ASMAtomicUoDecU32_EndProc                      RT_MANGLER(ASMAtomicUoDecU32_EndProc)
+# define ASMAtomicUoIncU32                              RT_MANGLER(ASMAtomicUoIncU32)       /* not-some-systems... */
+# define ASMAtomicUoIncU32_EndProc                      RT_MANGLER(ASMAtomicUoIncU32_EndProc)
+# define ASMAtomicUoOrU32                               RT_MANGLER(ASMAtomicUoOrU32)        /* not-some-systems... */
+# define ASMAtomicUoOrU32_EndProc                       RT_MANGLER(ASMAtomicUoOrU32_EndProc)
+# define ASMAtomicUoOrU64                               RT_MANGLER(ASMAtomicUoOrU64)        /* not-some-systems... */
+# define ASMAtomicUoOrU64_EndProc                       RT_MANGLER(ASMAtomicUoOrU64_EndProc)
 # define ASMAtomicUoReadU64                             RT_MANGLER(ASMAtomicUoReadU64)      /* not-some-systems... */
 # define ASMAtomicUoReadU64_EndProc                     RT_MANGLER(ASMAtomicUoReadU64_EndProc)
-# define ASMAtomicUoAndU64                              RT_MANGLER(ASMAtomicUoAndU64)       /* not-some-systems... */
-# define ASMAtomicUoAndU64_EndProc                      RT_MANGLER(ASMAtomicUoAndU64_EndProc)
-# define ASMAtomicUoAndU32                              RT_MANGLER(ASMAtomicUoAndU32)       /* not-some-systems... */
-# define ASMAtomicUoAndU32_EndProc                      RT_MANGLER(ASMAtomicUoAndU32_EndProc)
-# define ASMAtomicUoOrU64                               RT_MANGLER(ASMAtomicUoOrU64)        /* not-some-systems... */
-# define ASMAtomicUoOrU64_EndProc                       RT_MANGLER(ASMAtomicUoOrU64_EndProc)
-# define ASMAtomicUoOrU32                               RT_MANGLER(ASMAtomicUoOrU32)        /* not-some-systems... */
-# define ASMAtomicUoOrU32_EndProc                       RT_MANGLER(ASMAtomicUoOrU32_EndProc)
 # define ASMAtomicXchgU64                               RT_MANGLER(ASMAtomicXchgU64)        /* not-some-systems... */
 # define ASMAtomicXchgU64_EndProc                       RT_MANGLER(ASMAtomicXchgU64_EndProc)