[libclc] Use __scoped_atomic_udec/uinc_wrap to implement _clc_atomic_dec/inc (#168327)

wenju-he · web-flow · commit 1ea4aa1b9155 · 2025-11-26T11:22:47.000+08:00
diff --git a/libclc/clc/lib/generic/atomic/clc_atomic_dec.cl b/libclc/clc/lib/generic/atomic/clc_atomic_dec.cl
@@ -9,7 +9,7 @@
 #include <clc/atomic/clc_atomic_dec.h>
 
 #define __CLC_FUNCTION __clc_atomic_dec
-#define __CLC_IMPL_FUNCTION __scoped_atomic_fetch_add
+#define __CLC_IMPL_FUNCTION __scoped_atomic_udec_wrap
 #define __CLC_INC_DEC
 
 #define __CLC_BODY <clc_atomic_def.inc>
diff --git a/libclc/clc/lib/generic/atomic/clc_atomic_def.inc b/libclc/clc/lib/generic/atomic/clc_atomic_def.inc
@@ -46,7 +46,7 @@
   _CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __CLC_FUNCTION(                         \
       volatile ADDRSPACE __CLC_GENTYPE *Ptr, int MemoryOrder,                  \
       int MemoryScope) {                                                       \
-    return __CLC_IMPL_FUNCTION(Ptr, (__CLC_GENTYPE)1, MemoryOrder,             \
+    return __CLC_IMPL_FUNCTION(Ptr, (__CLC_U_GENTYPE)(-1), MemoryOrder,        \
                                MemoryScope);                                   \
   }
 #elif defined(__CLC_RETURN_VOID)
diff --git a/libclc/clc/lib/generic/atomic/clc_atomic_inc.cl b/libclc/clc/lib/generic/atomic/clc_atomic_inc.cl
@@ -9,7 +9,7 @@
 #include <clc/atomic/clc_atomic_inc.h>
 
 #define __CLC_FUNCTION __clc_atomic_inc
-#define __CLC_IMPL_FUNCTION __scoped_atomic_fetch_sub
+#define __CLC_IMPL_FUNCTION __scoped_atomic_uinc_wrap
 #define __CLC_INC_DEC
 
 #define __CLC_BODY <clc_atomic_def.inc>

Original file line number	Diff line number	Diff line change
`@@ -46,7 +46,7 @@`
`46`	`46`	`_CLC_OVERLOAD _CLC_DEF __CLC_GENTYPE __CLC_FUNCTION( \`
`47`	`47`	`volatile ADDRSPACE __CLC_GENTYPE *Ptr, int MemoryOrder, \`
`48`	`48`	`int MemoryScope) { \`
`49`		`- return __CLC_IMPL_FUNCTION(Ptr, (__CLC_GENTYPE)1, MemoryOrder, \`
	`49`	`+ return __CLC_IMPL_FUNCTION(Ptr, (__CLC_U_GENTYPE)(-1), MemoryOrder, \`
`50`	`50`	`MemoryScope); \`
`51`	`51`	`}`
`52`	`52`	`#elif defined(__CLC_RETURN_VOID)`