[Libclc-dev] [PATCH 2/3] Implement async_work_group_copy builtin

[Tom Stellard]

This is a simple implementation which just copies data synchronously.
---
 generic/include/clc/async/async_work_group_copy.h   | 15 +++++++++++++++
 generic/include/clc/async/async_work_group_copy.inc |  5 +++++
 generic/include/clc/clc.h                           |  1 +
 generic/lib/SOURCES                                 |  1 +
 generic/lib/async/async_work_group_copy.cl          | 21 +++++++++++++++++++++
 generic/lib/async/async_work_group_copy.inc         | 16 ++++++++++++++++
 6 files changed, 59 insertions(+)
 create mode 100644 generic/include/clc/async/async_work_group_copy.h
 create mode 100644 generic/include/clc/async/async_work_group_copy.inc
 create mode 100644 generic/lib/async/async_work_group_copy.cl
 create mode 100644 generic/lib/async/async_work_group_copy.inc

diff --git a/generic/include/clc/async/async_work_group_copy.h b/generic/include/clc/async/async_work_group_copy.h
new file mode 100644
index 0000000..39c637b
--- /dev/null
+++ b/generic/include/clc/async/async_work_group_copy.h
@@ -0,0 +1,15 @@
+#define __CLC_DST_ADDR_SPACE local
+#define __CLC_SRC_ADDR_SPACE global
+#define __CLC_BODY <clc/async/async_work_group_copy.inc>
+#include <clc/async/gentype.inc>
+#undef __CLC_DST_ADDR_SPACE
+#undef __CLC_SRC_ADDR_SPACE
+#undef __CLC_BODY
+
+#define __CLC_DST_ADDR_SPACE global
+#define __CLC_SRC_ADDR_SPACE local
+#define __CLC_BODY <clc/async/async_work_group_copy.inc>
+#include <clc/async/gentype.inc>
+#undef __CLC_DST_ADDR_SPACE
+#undef __CLC_SRC_ADDR_SPACE
+#undef __CLC_BODY
diff --git a/generic/include/clc/async/async_work_group_copy.inc b/generic/include/clc/async/async_work_group_copy.inc
new file mode 100644
index 0000000..d85df6c
--- /dev/null
+++ b/generic/include/clc/async/async_work_group_copy.inc
@@ -0,0 +1,5 @@
+_CLC_OVERLOAD _CLC_DECL event_t async_work_group_copy(
+  __CLC_DST_ADDR_SPACE __CLC_GENTYPE *dst,
+  const __CLC_SRC_ADDR_SPACE __CLC_GENTYPE *src,
+  size_t num_gentypes,
+  event_t event);
diff --git a/generic/include/clc/clc.h b/generic/include/clc/clc.h
index f499e6d..ed741b1 100644
--- a/generic/include/clc/clc.h
+++ b/generic/include/clc/clc.h
@@ -125,6 +125,7 @@
 #include <clc/synchronization/barrier.h>
 
 /* 6.11.10 Async Copy and Prefetch Functions */
+#include <clc/async/async_work_group_copy.h>
 #include <clc/async/prefetch.h>
 #include <clc/async/wait_group_events.h>
 
diff --git a/generic/lib/SOURCES b/generic/lib/SOURCES
index 3e847fe..e7dbca5 100644
--- a/generic/lib/SOURCES
+++ b/generic/lib/SOURCES
@@ -1,3 +1,4 @@
+async/async_work_group_copy.cl
 async/prefetch.cl
 async/wait_group_events.cl
 atomic/atomic_impl.ll
diff --git a/generic/lib/async/async_work_group_copy.cl b/generic/lib/async/async_work_group_copy.cl
new file mode 100644
index 0000000..31c71d6
--- /dev/null
+++ b/generic/lib/async/async_work_group_copy.cl
@@ -0,0 +1,21 @@
+#include <clc/clc.h>
+
+#ifdef cl_khr_fp64
+#pragma OPENCL EXTENSION cl_khr_fp64 : enable
+#endif
+
+#define __CLC_DST_ADDR_SPACE local
+#define __CLC_SRC_ADDR_SPACE global
+#define __CLC_BODY <async_work_group_copy.inc>
+#include <clc/async/gentype.inc>
+#undef __CLC_DST_ADDR_SPACE
+#undef __CLC_SRC_ADDR_SPACE
+#undef __CLC_BODY
+
+#define __CLC_DST_ADDR_SPACE global
+#define __CLC_SRC_ADDR_SPACE local
+#define __CLC_BODY <async_work_group_copy.inc>
+#include <clc/async/gentype.inc>
+#undef __CLC_DST_ADDR_SPACE
+#undef __CLC_SRC_ADDR_SPACE
+#undef __CLC_BODY
diff --git a/generic/lib/async/async_work_group_copy.inc b/generic/lib/async/async_work_group_copy.inc
new file mode 100644
index 0000000..dd3db3f
--- /dev/null
+++ b/generic/lib/async/async_work_group_copy.inc
@@ -0,0 +1,16 @@
+_CLC_OVERLOAD _CLC_DEF event_t async_work_group_copy(
+    __CLC_DST_ADDR_SPACE __CLC_GENTYPE *dst,
+    const __CLC_SRC_ADDR_SPACE __CLC_GENTYPE *src,
+    size_t num_gentypes,
+    event_t event) {
+
+  // __builtin_memcpy doesn't work with address spaces, so we need to
+  // implement the copy using a loop.
+
+  unsigned i;
+  for (i = 0; i < num_gentypes; ++i) {
+    dst[i] = src[i];
+  }
+
+  return event;
+}
-- 
1.8.1.5