1 files changed, 35 insertions, 0 deletions
diff --git a/spec/if/rtems/basedefs/align-down.yml b/spec/if/rtems/basedefs/align-down.yml
new file mode 100644
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+++ b/spec/if/rtems/basedefs/align-down.yml
@@ -0,0 +1,35 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+brief: |
+  Returns the specified value aligned down to the specified alignment.
+copyrights:
+- Copyright (C) 2016 embedded brains GmbH (http://www.embedded-brains.de)
+definition:
+  default: |
+    ( ( ${.:/params[0]/name} ) & ~( ( ${.:/params[1]/name} ) - 1 ) )
+  variants: []
+description: null
+enabled-by: true
+interface-type: macro
+links:
+- role: interface-placement
+  uid: header
+- role: interface-ingroup
+  uid: group
+name: RTEMS_ALIGN_DOWN
+notes: null
+params:
+- description: |
+    is the value to align down.
+  dir: null
+  name: _value
+- description: |
+    is the desired alignment in bytes.  The alignment shall be a power of two,
+    otherwise the returned value is undefined.  The alignment parameter is
+    evaluated twice.
+  dir: null
+  name: _alignment
+return:
+  return: |
+    The specified value aligned down to the specified alignment is returned.
+  return-values: []
+type: interface