Use ockl functions for subgroup collpredicates for SSCP (AdaptiveCpp#1877)

sbalint98 · web-flow · commit 650cc8b1dfb8 · 2025-07-17T19:02:26.000+02:00
diff --git a/src/libkernel/sscp/amdgpu/collpredicate.cpp b/src/libkernel/sscp/amdgpu/collpredicate.cpp
@@ -32,7 +32,7 @@ bool __acpp_sscp_work_group_none(bool pred){
 
 HIPSYCL_SSCP_CONVERGENT_BUILTIN
 bool __acpp_sscp_sub_group_all(bool pred){
-    return __acpp_sscp_sub_group_reduce_i8(__acpp_sscp_algorithm_op::logical_and, pred);
+    return __ockl_wfall_i32(pred);
 }
 
 HIPSYCL_SSCP_CONVERGENT_BUILTIN
@@ -42,6 +42,5 @@ bool __acpp_sscp_sub_group_any(bool pred){
 
 HIPSYCL_SSCP_CONVERGENT_BUILTIN
 bool __acpp_sscp_sub_group_none(bool pred){
-    bool result_or = __acpp_sscp_sub_group_reduce_i8(__acpp_sscp_algorithm_op::logical_or, pred);
-    return !result_or;
+    return !__ockl_wfany_i32(pred);
 }

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,7 @@ bool __acpp_sscp_work_group_none(bool pred){`
`32`	`32`
`33`	`33`	`HIPSYCL_SSCP_CONVERGENT_BUILTIN`
`34`	`34`	`bool __acpp_sscp_sub_group_all(bool pred){`
`35`		`- return __acpp_sscp_sub_group_reduce_i8(__acpp_sscp_algorithm_op::logical_and, pred);`
	`35`	`+ return __ockl_wfall_i32(pred);`
`36`	`36`	`}`
`37`	`37`
`38`	`38`	`HIPSYCL_SSCP_CONVERGENT_BUILTIN`
`@@ -42,6 +42,5 @@ bool __acpp_sscp_sub_group_any(bool pred){`
`42`	`42`
`43`	`43`	`HIPSYCL_SSCP_CONVERGENT_BUILTIN`
`44`	`44`	`bool __acpp_sscp_sub_group_none(bool pred){`
`45`		`- bool result_or = __acpp_sscp_sub_group_reduce_i8(__acpp_sscp_algorithm_op::logical_or, pred);`
`46`		`- return !result_or;`
	`45`	`+ return !__ockl_wfany_i32(pred);`
`47`	`46`	`}`