1 files changed, 115 insertions, 0 deletions
diff --git a/libcilkrts/runtime/config/arm/cilk-abi-vla.c b/libcilkrts/runtime/config/arm/cilk-abi-vla.c
new file mode 100644
index 00000000000..cf88d997046
--- /dev/null
+++ b/libcilkrts/runtime/config/arm/cilk-abi-vla.c
@@ -0,0 +1,115 @@
+/* cilk-abi-vla.cpp                  -*-C++-*-
+ *
+ *************************************************************************
+ *
+ *  Copyright (C) 2013-2016, Intel Corporation
+ *  All rights reserved.
+ *  
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *  
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in
+ *      the documentation and/or other materials provided with the
+ *      distribution.
+ *    * Neither the name of Intel Corporation nor the names of its
+ *      contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *  
+ *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *  HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ *  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ *  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ *  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ *  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
+ *  WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ *  POSSIBILITY OF SUCH DAMAGE.
+ *  
+ *  *********************************************************************
+ *  
+ *  PLEASE NOTE: This file is a downstream copy of a file mainitained in
+ *  a repository at cilkplus.org. Changes made to this file that are not
+ *  submitted through the contribution process detailed at
+ *  http://www.cilkplus.org/submit-cilk-contribution will be lost the next
+ *  time that a new version is released. Changes only submitted to the
+ *  GNU compiler collection or posted to the git repository at
+ *  https://bitbucket.org/intelcilkruntime/intel-cilk-runtime.git are
+ *  not tracked.
+ *  
+ *  We welcome your contributions to this open source project. Thank you
+ *  for your assistance in helping us improve Cilk Plus.
+ *
+ **************************************************************************/
+
+/*
+ * Implementation of Variable Length Array (VLA) ABI.
+ *
+ * The compiler calls these functions to allocate Variable Length Arrays
+ * at runtime.  The compiler must guarantee that __cilkrts_stack_free() is
+ * called to cleanup any memory allocated by __cilkrts_stack_alloc().
+ *
+ * This generic implementation always allocates the memory from the heap.
+ * Optimally, the implementation should expand the frame of the calling
+ * function if possible, since that will be faster.  See the x86 version
+ * for one possible implementation.
+ */
+
+#include <assert.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#include "internal/abi.h"
+#include "cilk-abi-vla-internal.h"
+
+// Allocate space for a variable length array
+CILK_ABI(__cilkrts_void_ptr)
+__cilkrts_stack_alloc(
+    __cilkrts_stack_frame *sf,
+    size_t size,
+    size_t distance_from_sp_to_alloca_area,
+    uint32_t align,     // align is always >= minimum stack alignment and
+                        // >= ptr_size as well, and must be a power of 2.
+    uint32_t needs_tag  // non-zero if the pointer being returned needs to
+                        // be tagged
+)
+{
+    // full_size will be a multiple of align, and contains
+    // enough extra space to allocate a marker.
+    size_t full_size = (size + align - 1) & ~(align - 1);
+
+    // Allocate memory from the heap.  The compiler is responsible
+    // for guaranteeing us a chance to free it before the function
+    // exits
+
+    return (void *)vla_internal_heap_alloc(sf, full_size, align);
+}
+
+// Free the space allocated for a variable length array.
+CILK_ABI(void)
+__cilkrts_stack_free(
+    __cilkrts_stack_frame *sf,
+    void *p,
+    size_t size,
+    size_t distance_from_sp_to_alloca_area,
+    uint32_t align, // same requirements as for align in allocation,
+                    // and must match alignment that was passed when
+                    // doing the allocation 
+    uint32_t known_from_stack  // non-zero if this is known to be allocated
+                               // on the stack, and therefore has no tag
+)
+{
+    // full_size will be a multiple of align, and contains
+    // enough extra space to allocate a marker if one was needed.
+    size_t full_size = (size + align - 1) & ~(align - 1);
+
+    // Just free the allocated memory to the heap since we don't know
+    // how to expand/contract the calling frame
+    vla_internal_heap_free(p, full_size);
+}