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-rw-r--r--erts/emulator/beam/ops.tab91
1 files changed, 90 insertions, 1 deletions
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index fc53a88a3a..9b168889dd 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -1,7 +1,7 @@
#
# %CopyrightBegin%
#
-# Copyright Ericsson AB 1997-2011. All Rights Reserved.
+# Copyright Ericsson AB 1997-2012. All Rights Reserved.
#
# The contents of this file are subject to the Erlang Public License,
# Version 1.1, (the "License"); you may not use this file except in
@@ -883,6 +883,95 @@ call_ext_last u==3 u$func:erlang:hibernate/3 D => i_hibernate
call_ext_only u==3 u$func:erlang:hibernate/3 => i_hibernate
#
+# If VM probes are not enabled, we want to short-circult calls to
+# the dt tag BIFs to make them as cheap as possible.
+#
+
+%unless USE_VM_PROBES
+
+call_ext Arity u$func:erlang:dt_get_tag/0 => \
+ move a=am_undefined r
+call_ext_last Arity u$func:erlang:dt_get_tag/0 D => \
+ move a=am_undefined r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_get_tag/0 => \
+ move a=am_undefined r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_put_tag/1 => \
+ move a=am_undefined r
+move Any r | call_ext_last Arity u$func:erlang:dt_put_tag/1 D => \
+ move a=am_undefined r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_put_tag/1 => \
+ move a=am_undefined r | return
+call_ext Arity u$func:erlang:dt_put_tag/1 => \
+ move a=am_undefined r
+call_ext_last Arity u$func:erlang:dt_put_tag/1 D => \
+ move a=am_undefined r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_put_tag/1 => \
+ move a=am_undefined r | return
+
+call_ext Arity u$func:erlang:dt_get_tag_data/0 => \
+ move a=am_undefined r
+call_ext_last Arity u$func:erlang:dt_get_tag_data/0 D => \
+ move a=am_undefined r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_get_tag_data/0 => \
+ move a=am_undefined r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_spread_tag/1 => \
+ move a=am_true r
+move Any r | call_ext_last Arity u$func:erlang:dt_spread_tag/1 D => \
+ move a=am_true r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_spread_tag/1 => \
+ move a=am_true r | return
+call_ext Arity u$func:erlang:dt_spread_tag/1 => \
+ move a=am_true r
+call_ext_last Arity u$func:erlang:dt_spread_tag/1 D => \
+ move a=am_true r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_spread_tag/1 => \
+ move a=am_true r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_restore_tag/1 => \
+ move a=am_true r
+move Any r | call_ext_last Arity u$func:erlang:dt_restore_tag/1 D => \
+ move a=am_true r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_restore_tag/1 => \
+ move a=am_true r | return
+call_ext Arity u$func:erlang:dt_restore_tag/1 => \
+ move a=am_true r
+call_ext_last Arity u$func:erlang:dt_restore_tag/1 D => \
+ move a=am_true r | deallocate D | return
+call_ext_only Arity u$func:erlang:dt_restore_tag/1 => \
+ move a=am_true r | return
+
+move Any r | call_ext Arity u$func:erlang:dt_prepend_vm_tag_data/1 => \
+ move Any r
+move Any r | call_ext_last Arity u$func:erlang:dt_prepend_vm_tag_data/1 D => \
+ move Any r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_prepend_vm_tag_data/1 => \
+ move Any r | return
+call_ext Arity u$func:erlang:dt_prepend_vm_tag_data/1 =>
+call_ext_last Arity u$func:erlang:dt_prepend_vm_tag_data/1 D => \
+ deallocate D | return
+call_ext_only Arity u$func:erlang:dt_prepend_vm_tag_data/1 => \
+ return
+
+move Any r | call_ext Arity u$func:erlang:dt_append_vm_tag_data/1 => \
+ move Any r
+move Any r | call_ext_last Arity u$func:erlang:dt_append_vm_tag_data/1 D => \
+ move Any r | deallocate D | return
+move Any r | call_ext_only Arity u$func:erlang:dt_append_vm_tag_data/1 => \
+ move Any r | return
+call_ext Arity u$func:erlang:dt_append_vm_tag_data/1 =>
+call_ext_last Arity u$func:erlang:dt_append_vm_tag_data/1 D => \
+ deallocate D | return
+call_ext_only Arity u$func:erlang:dt_append_vm_tag_data/1 => \
+ return
+
+# Can happen after one of the transformations above.
+move Discarded r | move Something r => move Something r
+
+%endif
+
+#
# The general case for BIFs that have no special instructions.
# A BIF used in the tail must be followed by a return instruction.
#