path: root/erts/emulator/beam/ops.tab

#
# %CopyrightBegin%
#
# Copyright Ericsson AB 1997-2013. 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
# compliance with the License. You should have received a copy of the
# Erlang Public License along with this software. If not, it can be
# retrieved online at http://www.erlang.org/.
#
# Software distributed under the License is distributed on an "AS IS"
# basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
# the License for the specific language governing rights and limitations
# under the License.
#
# %CopyrightEnd%
#

#
# The instructions that follows are only known by the loader and the emulator.
# They can be changed without recompiling old Beam files.
#
# Instructions starting with a "i_" prefix are instructions produced by
# instruction transformations; thus, they never occur in BEAM files.
#

# The too_old_compiler/0 instruction is specially handled in beam_load.c
# to produce a user-friendly message informing the user that the module
# needs to be re-compiled with a modern compiler.

too_old_compiler/0
too_old_compiler | never() =>

# In R9C and earlier, the loader used to insert special instructions inside
# the module_info/0,1 functions. (In R10B and later, the compiler inserts
# an explicit call to an undocumented BIF, so that no loader trickery is
# necessary.) Since the instructions don't work correctly in R12B, simply
# refuse to load the module.

func_info M=a a==am_module_info A=u==0 | label L | move n r => too_old_compiler
func_info M=a a==am_module_info A=u==1 | label L | move n r => too_old_compiler

# The undocumented and unsupported guard BIF is_constant/1 was removed
# in R13. The is_constant/2 operation is marked as obsolete in genop.tab,
# so the loader will automatically generate a too_old_compiler message
# it is used, but we need to handle the is_constant/1 BIF specially here.

bif1 Fail u$func:erlang:is_constant/1 Src Dst => too_old_compiler

# Since the constant pool was introduced in R12B, empty tuples ({})
# are literals. Therefore we no longer need to allow put_tuple/2
# with a tuple size of zero.

put_tuple u==0 d => too_old_compiler

#
# All the other instructions.
#

label L
i_func_info I a a I
int_code_end

i_generic_breakpoint
i_debug_breakpoint
i_return_time_trace
i_return_to_trace
i_yield

return

#
# To ensure that a "move Src x(0)" instruction can be combined
# with the following call instruction, we need to make sure that
# there is no line/1 instruction between the move and the call.
#

move S r | line Loc | call_ext Ar Func => \
     line Loc | move S r | call_ext Ar Func
move S r | line Loc | call_ext_last Ar Func=u$is_bif D => \
     line Loc | move S r | call_ext_last Ar Func D
move S r | line Loc | call_ext_only Ar Func=u$is_bif => \
     line Loc | move S r | call_ext_only Ar Func
move S r | line Loc | call Ar Func => \
     line Loc | move S r | call Ar Func

#
# A tail-recursive call to an external function (non-BIF) will
# never be saved on the stack, so there is no reason to keep
# the line instruction. (The compiler did not remove the line
# instruction because it cannot tell the difference between
# BIFs and ordinary Erlang functions.)
#

line Loc | call_ext_last Ar Func=u$is_not_bif D => \
     call_ext_last Ar Func D
line Loc | call_ext_only Ar Func=u$is_not_bif => \
     call_ext_only Ar Func

line Loc | func_info M F A => func_info M F A | line Loc

line I


%macro: allocate Allocate -pack
%macro: allocate_zero AllocateZero -pack
%macro: allocate_heap AllocateHeap -pack
%macro: allocate_heap_zero AllocateHeapZero -pack
%macro: test_heap TestHeap -pack

allocate t t
allocate_heap t I t
deallocate I
init y
allocate_zero t t
allocate_heap_zero t I t

trim N Remaining => i_trim N
i_trim I

test_heap I t

allocate_heap S u==0 R => allocate S R
allocate_heap_zero S u==0 R => allocate_zero S R

init2 y y
init3 y y y
init Y1 | init Y2 | init Y3 => init3 Y1 Y2 Y3
init Y1 | init Y2 => init2 Y1 Y2
%macro: init2 Init2 -pack
%macro: init3 Init3 -pack

# Selecting values

select_val S=aiq Fail=f Size=u Rest=* => const_select_val(S, Fail, Size, Rest)

select_val S=s Fail=f Size=u Rest=* | use_jump_tab(Size, Rest) => \
  gen_jump_tab(S, Fail, Size, Rest)

is_integer Fail=f S | select_val S=s Fail=f Size=u Rest=* | use_jump_tab(Size, Rest) => \
  gen_jump_tab(S, Fail, Size, Rest)

is_integer TypeFail=f S | select_val S=s Fail=f Size=u Rest=* | \
	   mixed_types(Size, Rest) => \
  gen_split_values(S, TypeFail, Fail, Size, Rest)

select_val S=s Fail=f Size=u Rest=* | mixed_types(Size, Rest) => \
  gen_split_values(S, Fail, Fail, Size, Rest)

is_integer Fail=f S | select_val S=d Fail=f Size=u Rest=* | \
  fixed_size_values(Size, Rest) => gen_select_val(S, Fail, Size, Rest)

is_atom Fail=f S | select_val S=d Fail=f Size=u Rest=* | \
  fixed_size_values(Size, Rest) => gen_select_val(S, Fail, Size, Rest)

select_val S=s Fail=f Size=u Rest=* | floats_or_bignums(Size, Rest) => \
  gen_select_literals(S, Fail, Size, Rest)

select_val S=d Fail=f Size=u Rest=* | fixed_size_values(Size, Rest) => \
  gen_select_val(S, Fail, Size, Rest)

is_tuple Fail=f S | select_tuple_arity S=d Fail=f Size=u Rest=* => \
  gen_select_tuple_arity(S, Fail, Size, Rest)

select_tuple_arity S=d Fail=f Size=u Rest=* => \
  gen_select_tuple_arity(S, Fail, Size, Rest)

i_select_val_bins r f I
i_select_val_bins x f I
i_select_val_bins y f I

i_select_val_lins r f I
i_select_val_lins x f I
i_select_val_lins y f I

i_select_val2 r f c c f f
i_select_val2 x f c c f f
i_select_val2 y f c c f f

i_select_tuple_arity r f I
i_select_tuple_arity x f I
i_select_tuple_arity y f I

i_select_tuple_arity2 r f A A f f
i_select_tuple_arity2 x f A A f f
i_select_tuple_arity2 y f A A f f

i_jump_on_val_zero r f I
i_jump_on_val_zero x f I
i_jump_on_val_zero y f I

i_jump_on_val r f I I
i_jump_on_val x f I I
i_jump_on_val y f I I

jump Target | label Lbl | same_label(Target, Lbl) => label Lbl

is_ne_exact L1 S1 S2 | jump Fail | label L2 | same_label(L1, L2) => \
  is_eq_exact Fail S1 S2 | label L2

%macro: get_list GetList -pack
get_list x x x
get_list x x y
get_list x x r
get_list x y x
get_list x y y
get_list x y r
get_list x r x
get_list x r y

get_list y x x
get_list y x y
get_list y x r
get_list y y x
get_list y y y
get_list y y r
get_list y r x
get_list y r y

get_list r x x
get_list r x y
get_list r x r
get_list r y x
get_list r y y
get_list r y r
get_list r r x
get_list r r y

# Old-style catch.
catch y f
catch_end y

# Try/catch.
try Y F => catch Y F
try_case Y => try_end Y
try_end y

try_case_end Literal=q => move Literal x | try_case_end x
try_case_end s

# Destructive set tuple element

set_tuple_element Lit=q Tuple Pos => move Lit x | set_tuple_element x Tuple Pos
set_tuple_element s d P

# Get tuple element

%macro: i_get_tuple_element GetTupleElement -pack
i_get_tuple_element x P x
i_get_tuple_element r P x
i_get_tuple_element y P x
i_get_tuple_element x P r
i_get_tuple_element y P r

%cold
i_get_tuple_element r P r
i_get_tuple_element x P y
i_get_tuple_element r P y
i_get_tuple_element y P y
%hot

%macro: is_number IsNumber -fail_action
%cold
is_number f r
is_number f x
is_number f y
%hot
is_number Fail=f i =>
is_number Fail=f na => jump Fail
is_number Fail Literal=q => move Literal x | is_number Fail x

jump f

case_end Literal=cq => move Literal x | case_end x
badmatch Literal=cq => move Literal x | badmatch x

case_end r
case_end x
case_end y

badmatch r
badmatch x
badmatch y

if_end
raise s s

# Internal now, but could be useful to make known to the compiler.
badarg j
system_limit j

move C=cxy r | jump Lbl => move_jump Lbl C

%macro: move_jump MoveJump -nonext
move_jump f n
move_jump f c
move_jump f x
move_jump f y

move X1=x Y1=y | move X2=x Y2=y => move2 X1 Y1 X2 Y2
move Y1=y X1=x | move Y2=y X2=x => move2 Y1 X1 Y2 X2
move X1=x X2=x | move X3=x X4=x => move2 X1 X2 X3 X4

move C=aiq X=x==1 => move_x1 C
move C=aiq X=x==2 => move_x2 C

move_x1 c
move_x2 c

%macro: move2 Move2 -pack
move2 x y x y
move2 y x y x
move2 x x x x

# The compiler almost never generates a "move Literal y(Y)" instruction,
# so let's cheat if we encounter one.
move S=n D=y => init D
move S=c D=y => move S x | move x D

%macro:move Move -pack -gen_dest
move x x
move x y
move x r
move y x
move y r
move r x
move r y
move c r
move c x
move n x
move n r
move y y

# Receive operations.

loop_rec Fail Src | smp_mark_target_label(Fail) => i_loop_rec Fail Src

label L | wait_timeout Fail Src | smp_already_locked(L) => label L | i_wait_timeout_locked Fail Src
wait_timeout Fail Src => i_wait_timeout Fail Src
i_wait_timeout Fail Src=aiq => gen_literal_timeout(Fail, Src)
i_wait_timeout_locked Fail Src=aiq => gen_literal_timeout_locked(Fail, Src)

label L | wait Fail | smp_already_locked(L) => label L | wait_locked Fail
wait Fail | smp() => wait_unlocked Fail

label L | timeout | smp_already_locked(L) => label L | timeout_locked

remove_message
timeout
timeout_locked
i_loop_rec f r
loop_rec_end f
wait f
wait_locked f
wait_unlocked f
i_wait_timeout f I
i_wait_timeout f s
i_wait_timeout_locked f I
i_wait_timeout_locked f s
i_wait_error
i_wait_error_locked

send

#
# Optimized comparisons with one immediate/literal operand.
#

is_eq_exact Lbl R=rxy C=ian => i_is_eq_exact_immed Lbl R C
is_eq_exact Lbl R=rxy C=q => i_is_eq_exact_literal R Lbl C

is_ne_exact Lbl R=rxy C=ian => i_is_ne_exact_immed Lbl R C
is_ne_exact Lbl R=rxy C=q => i_is_ne_exact_literal R Lbl C

%macro: i_is_eq_exact_immed EqualImmed -fail_action
i_is_eq_exact_immed f r c
i_is_eq_exact_immed f x c
i_is_eq_exact_immed f y c

i_is_eq_exact_literal r f c
i_is_eq_exact_literal x f c
i_is_eq_exact_literal y f c

%macro: i_is_ne_exact_immed NotEqualImmed -fail_action
i_is_ne_exact_immed f r c
i_is_ne_exact_immed f x c
i_is_ne_exact_immed f y c

i_is_ne_exact_literal r f c
i_is_ne_exact_literal x f c
i_is_ne_exact_literal y f c

#
# All other comparisons.
#

is_eq_exact Lbl S1 S2 => i_fetch S1 S2 | i_is_eq_exact Lbl
is_ne_exact Lbl S1 S2 => i_fetch S1 S2 | i_is_ne_exact Lbl

is_ge Lbl S1 S2 => i_fetch S1 S2 | i_is_ge Lbl
is_lt Lbl S1 S2 => i_fetch S1 S2 | i_is_lt Lbl
is_eq Lbl S1 S2 => i_fetch S1 S2 | i_is_eq Lbl
is_ne Lbl S1 S2 => i_fetch S1 S2 | i_is_ne Lbl

i_is_eq_exact f
i_is_ne_exact f
i_is_lt f
i_is_ge f
i_is_eq f
i_is_ne f

#
# Putting things.
#

put_tuple Arity Dst => i_put_tuple Dst u

i_put_tuple Dst Arity Puts=* | put S1 | put S2 | \
  put S3 | put S4 | put S5 => \
	    tuple_append_put5(Arity, Dst, Puts, S1, S2, S3, S4, S5)

i_put_tuple Dst Arity Puts=* | put S => \
	    tuple_append_put(Arity, Dst, Puts, S)

i_put_tuple/2

%macro:i_put_tuple PutTuple -pack -goto:do_put_tuple
i_put_tuple r I
i_put_tuple x I
i_put_tuple y I

#
# The instruction "put_list Const [] Dst" will not be generated by
# the current BEAM compiler. But until R15A, play it safe by handling
# that instruction with the following transformation.
#
put_list Const=c n Dst => move Const x | put_list x n Dst

%macro:put_list PutList -pack -gen_dest

put_list x n x
put_list y n x
put_list x x x
put_list y x x
put_list x x r
put_list y r r

put_list y y x
put_list x y x
put_list r x x
put_list r y x
put_list r x r
put_list y y r
put_list y r x
put_list r n x

put_list x r x
put_list x y r
put_list y x r
put_list y x x

put_list x r r

# put_list SrcReg Constant Dst
put_list r c r
put_list r c x
put_list r c y

put_list x c r
put_list x c x
put_list x c y

put_list y c r
put_list y c x
put_list y c y

# put_list Constant SrcReg Dst
put_list c r r
put_list c r x
put_list c r y

put_list c x r
put_list c x x
put_list c x y

put_list c y r
put_list c y x
put_list c y y

%cold
put_list s s d
%hot

%macro: i_fetch FetchArgs -pack
i_fetch c c
i_fetch c r
i_fetch c x
i_fetch c y
i_fetch r c
i_fetch r x
i_fetch r y
i_fetch x c
i_fetch x r
i_fetch x x
i_fetch x y
i_fetch y c
i_fetch y r
i_fetch y x
i_fetch y y

%cold
i_fetch s s
%hot

#
# Some more only used by the emulator
#

normal_exit
continue_exit
apply_bif
call_nif
call_error_handler
error_action_code
return_trace

#
# Instruction transformations & folded instructions.
#

# Note: There is no 'move_return y r', since there never are any y registers
# when we do move_return (if we have y registers, we must do move_deallocate_return).

move S r | return => move_return S r

%macro: move_return MoveReturn -nonext
move_return x r
move_return c r
move_return n r

move S r | deallocate D | return => move_deallocate_return S r D

%macro: move_deallocate_return MoveDeallocateReturn -pack -nonext
move_deallocate_return x r Q
move_deallocate_return y r Q
move_deallocate_return c r Q
move_deallocate_return n r Q

deallocate D | return => deallocate_return D

%macro: deallocate_return DeallocateReturn -nonext
deallocate_return Q

test_heap Need u==1 | put_list Y=y r r => test_heap_1_put_list Need Y

%macro: test_heap_1_put_list TestHeapPutList -pack
test_heap_1_put_list I y

# Test tuple & arity (head)

is_tuple Fail Literal=q => move Literal x | is_tuple Fail x
is_tuple Fail=f c => jump Fail
is_tuple Fail=f S=rxy | test_arity Fail=f S=rxy Arity => is_tuple_of_arity Fail S Arity

%macro:is_tuple_of_arity IsTupleOfArity -fail_action

is_tuple_of_arity f x A
is_tuple_of_arity f y A
is_tuple_of_arity f r A

%macro: is_tuple IsTuple -fail_action
is_tuple f x
is_tuple f y
is_tuple f r

test_arity Fail Literal=q Arity => move Literal x | test_arity Fail x Arity
test_arity Fail=f c Arity => jump Fail

%macro: test_arity IsArity -fail_action
test_arity f x A
test_arity f y A
test_arity f r A

is_tuple_of_arity Fail=f Reg Arity | get_tuple_element Reg P=u==0 Dst=xy => \
  is_tuple_of_arity Fail Reg Arity | extract_next_element Dst | original_reg Reg P

test_arity Fail Reg Arity | get_tuple_element Reg P=u==0 Dst=xy => \
  test_arity Fail Reg Arity | extract_next_element Dst | original_reg Reg P

original_reg Reg P1 | get_tuple_element Reg P2 Dst=xy | succ(P1, P2) => \
  extract_next_element Dst | original_reg Reg P2

get_tuple_element Reg P Dst => i_get_tuple_element Reg P Dst | original_reg Reg P

original_reg Reg Pos =>

original_reg/2

extract_next_element D1=xy | original_reg Reg P1 | get_tuple_element Reg P2 D2=xy | \
succ(P1, P2) | succ(D1, D2) => \
  extract_next_element2 D1 | original_reg Reg P2

extract_next_element2 D1=xy | original_reg Reg P1 | get_tuple_element Reg P2 D2=xy | \
succ(P1, P2) | succ2(D1, D2) => \
  extract_next_element3 D1 | original_reg Reg P2

#extract_next_element3 D1=xy | original_reg Reg P1 | get_tuple_element Reg P2 D2=xy | \
#succ(P1, P2) | succ3(D1, D2) => \
#  extract_next_element4 D1 | original_reg Reg P2

%macro: extract_next_element ExtractNextElement -pack
extract_next_element x
extract_next_element y

%macro: extract_next_element2 ExtractNextElement2 -pack
extract_next_element2 x
extract_next_element2 y

%macro: extract_next_element3 ExtractNextElement3 -pack
extract_next_element3 x
extract_next_element3 y

#%macro: extract_next_element4 ExtractNextElement4 -pack
#extract_next_element4 x
#extract_next_element4 y

is_integer Fail=f i =>
is_integer Fail=f an => jump Fail
is_integer Fail Literal=q => move Literal x | is_integer Fail x

is_integer Fail=f S=rx | allocate Need Regs => is_integer_allocate Fail S Need Regs

%macro: is_integer_allocate IsIntegerAllocate -fail_action
is_integer_allocate f x I I
is_integer_allocate f r I I

%macro: is_integer IsInteger -fail_action
is_integer f x
is_integer f y
is_integer f r

is_list Fail=f n =>
is_list Fail Literal=q => move Literal x | is_list Fail x
is_list Fail=f c => jump Fail
%macro: is_list IsList -fail_action
is_list f r
is_list f x
%cold
is_list f y
%hot

is_nonempty_list Fail=f S=rx | allocate Need Rs => is_nonempty_list_allocate Fail S Need Rs

%macro:is_nonempty_list_allocate IsNonemptyListAllocate -fail_action -pack
is_nonempty_list_allocate f x I t
is_nonempty_list_allocate f r I t

is_nonempty_list F=f r | test_heap I1 I2 => is_non_empty_list_test_heap F r I1 I2

%macro: is_non_empty_list_test_heap IsNonemptyListTestHeap -fail_action -pack
is_non_empty_list_test_heap f r I t

%macro: is_nonempty_list IsNonemptyList -fail_action
is_nonempty_list f x
is_nonempty_list f y
is_nonempty_list f r

%macro: is_atom IsAtom -fail_action
is_atom f x
is_atom f r
%cold
is_atom f y
%hot
is_atom Fail=f a =>
is_atom Fail=f niq => jump Fail

%macro: is_float IsFloat -fail_action
is_float f r
is_float f x
%cold
is_float f y
%hot
is_float Fail=f nai => jump Fail
is_float Fail Literal=q => move Literal x | is_float Fail x

is_nil Fail=f n =>
is_nil Fail=f qia => jump Fail

%macro: is_nil IsNil -fail_action
is_nil f x
is_nil f y
is_nil f r

is_binary Fail Literal=q => move Literal x | is_binary Fail x
is_binary Fail=f c => jump Fail
%macro: is_binary IsBinary -fail_action
is_binary f r
is_binary f x
%cold
is_binary f y
%hot

# XXX Deprecated.
is_bitstr Fail Term => is_bitstring Fail Term

is_bitstring Fail Literal=q => move Literal x | is_bitstring Fail x
is_bitstring Fail=f c => jump Fail
%macro: is_bitstring IsBitstring -fail_action
is_bitstring f r
is_bitstring f x
%cold
is_bitstring f y
%hot

is_reference Fail=f cq => jump Fail
%macro: is_reference IsRef -fail_action
is_reference f r
is_reference f x
%cold
is_reference f y
%hot

is_pid Fail=f cq => jump Fail
%macro: is_pid IsPid -fail_action
is_pid f r
is_pid f x
%cold
is_pid f y
%hot

is_port Fail=f cq => jump Fail
%macro: is_port IsPort -fail_action
is_port f r
is_port f x
%cold
is_port f y
%hot

is_boolean Fail=f a==am_true =>
is_boolean Fail=f a==am_false =>
is_boolean Fail=f ac => jump Fail

%cold
%macro: is_boolean IsBoolean -fail_action
is_boolean f r
is_boolean f x
is_boolean f y
%hot

is_function2 Fail=f acq Arity => jump Fail
is_function2 Fail=f Fun a => jump Fail
is_function2 Fail Fun Literal=q => move Literal x | is_function2 Fail Fun x

is_function2 f s s
%macro: is_function2 IsFunction2 -fail_action

# Allocating & initializing.
allocate Need Regs | init Y => allocate_init Need Regs Y
init Y1 | init Y2 => init2 Y1 Y2

%macro: allocate_init AllocateInit -pack
allocate_init t I y

#################################################################
# External function and bif calls.
#################################################################

#
# The BIFs erts_internal:check_process_code/2 must be called like a function,
# to ensure that c_p->i (program counter) is set correctly (an ordinary
# BIF call doesn't set it).
#

call_ext u==2 Bif=u$bif:erts_internal:check_process_code/2 => i_call_ext Bif
call_ext_last u==2 Bif=u$bif:erts_internal:check_process_code/2 D => i_call_ext_last Bif D
call_ext_only u==2 Bif=u$bif:erts_internal:check_process_code/2 => i_call_ext_only Bif

#
# The BIFs erlang:garbage_collect/0 must be called like a function,
# to allow them to invoke the garbage collector. (The stack pointer must
# be saved and p->arity must be zeroed, which is not done on ordinary BIF calls.)
#

call_ext u==0 Bif=u$bif:erlang:garbage_collect/0 => i_call_ext Bif
call_ext_last u==0 Bif=u$bif:erlang:garbage_collect/0 D => i_call_ext_last Bif D
call_ext_only u==0 Bif=u$bif:erlang:garbage_collect/0 => i_call_ext_only Bif

#
# put/2 and erase/1 must be able to do garbage collection, so we must call
# them like functions.
#

call_ext u==2 Bif=u$bif:erlang:put/2 => i_call_ext Bif
call_ext_last u==2 Bif=u$bif:erlang:put/2 D => i_call_ext_last Bif D
call_ext_only u==2 Bif=u$bif:erlang:put/2 => i_call_ext_only Bif

call_ext u==1 Bif=u$bif:erlang:erase/1 => i_call_ext Bif
call_ext_last u==1 Bif=u$bif:erlang:erase/1 D => i_call_ext_last Bif D
call_ext_only u==1 Bif=u$bif:erlang:erase/1 => i_call_ext_only Bif

#
# The process_info/1,2 BIF should be called like a function, to force
# the emulator to set c_p->current before calling it (a BIF call doesn't
# set it).
#
# In addition, we force the use of a non-tail-recursive call.  This will ensure
# that c_p->cp points into the function making the call.
#

call_ext u==1 Bif=u$bif:erlang:process_info/1 => i_call_ext Bif
call_ext_last u==1 Bif=u$bif:erlang:process_info/1 D => i_call_ext Bif | deallocate_return D
call_ext_only Ar=u==1 Bif=u$bif:erlang:process_info/1 => allocate u Ar | i_call_ext Bif | deallocate_return u

call_ext u==2 Bif=u$bif:erlang:process_info/2 => i_call_ext Bif
call_ext_last u==2 Bif=u$bif:erlang:process_info/2 D => i_call_ext Bif | deallocate_return D
call_ext_only Ar=u==2 Bif=u$bif:erlang:process_info/2 => allocate u Ar | i_call_ext Bif | deallocate_return u

#
# load_nif/2 also needs to know calling function like process_info
#
call_ext u==2 Bif=u$bif:erlang:load_nif/2 => i_call_ext Bif
call_ext_last u==2 Bif=u$bif:erlang:load_nif/2 D => i_call_ext Bif | deallocate_return D
call_ext_only Ar=u==2 Bif=u$bif:erlang:load_nif/2 => allocate u Ar | i_call_ext Bif | deallocate_return u


#
# apply/2 is an instruction, not a BIF.
#

call_ext u==2 u$func:erlang:apply/2 => i_apply_fun
call_ext_last u==2 u$func:erlang:apply/2 D => i_apply_fun_last D
call_ext_only u==2 u$func:erlang:apply/2 => i_apply_fun_only

#
# The apply/3 BIF is an instruction.
#

call_ext u==3 u$bif:erlang:apply/3 => i_apply
call_ext_last u==3 u$bif:erlang:apply/3 D => i_apply_last D
call_ext_only u==3 u$bif:erlang:apply/3 => i_apply_only

#
# The exit/1 and throw/1 BIFs never execute the instruction following them;
# thus there is no need to generate any return instruction.
#

call_ext_last u==1 Bif=u$bif:erlang:exit/1 D => call_bif Bif
call_ext_last u==1 Bif=u$bif:erlang:throw/1 D => call_bif Bif

call_ext_only u==1 Bif=u$bif:erlang:exit/1 => call_bif Bif
call_ext_only u==1 Bif=u$bif:erlang:throw/1 => call_bif Bif

#
# The error/1 and error/2 BIFs never execute the instruction following them;
# thus there is no need to generate any return instruction.
# However, they generate stack backtraces, so if the call instruction
# is call_ext_only/2 instruction, we explicitly do an allocate/2 to store
# the continuation pointer on the stack.
#

call_ext_last u==1 Bif=u$bif:erlang:error/1 D => call_bif Bif
call_ext_last u==2 Bif=u$bif:erlang:error/2 D => call_bif Bif

call_ext_only Ar=u==1 Bif=u$bif:erlang:error/1 => \
  allocate u Ar | call_bif Bif
call_ext_only Ar=u==2 Bif=u$bif:erlang:error/2 => \
  allocate u Ar | call_bif Bif

#
# The yield/0 BIF is an instruction
#

call_ext u==0 u$func:erlang:yield/0 => i_yield
call_ext_last u==0 u$func:erlang:yield/0 D => i_yield | deallocate_return D
call_ext_only u==0 u$func:erlang:yield/0 => i_yield | return

#
# The hibernate/3 BIF is an instruction.
#
call_ext u==3 u$func:erlang:hibernate/3 => i_hibernate
call_ext_last u==3 u$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.
#
# To make trapping and stack backtraces work correctly, we make sure that
# the continuation pointer is always stored on the stack.

call_ext u Bif=u$is_bif => call_bif Bif

call_ext_last u Bif=u$is_bif D => call_bif Bif | deallocate_return D

call_ext_only Ar=u Bif=u$is_bif => \
  allocate u Ar | call_bif Bif | deallocate_return u

#
# Any remaining calls are calls to Erlang functions, not BIFs.
# We rename the instructions to internal names.  This is necessary,
# to avoid an end-less loop, because we want to call a few BIFs
# with call instructions.
#

move S=c r | call_ext Ar=u Func=u$is_not_bif => i_move_call_ext S r Func
move S=c r | call_ext_last Ar=u Func=u$is_not_bif D => i_move_call_ext_last Func D S r
move S=c r | call_ext_only Ar=u Func=u$is_not_bif => i_move_call_ext_only Func S r 

call_ext Ar Func        => i_call_ext Func
call_ext_last Ar Func D => i_call_ext_last Func D
call_ext_only Ar Func   => i_call_ext_only Func

i_apply
i_apply_last P
i_apply_only

i_apply_fun
i_apply_fun_last P
i_apply_fun_only

i_hibernate

call_bif e

#
# Calls to non-building and guard BIFs.
#

bif0 u$bif:erlang:self/0 Dst=d => self Dst
bif0 u$bif:erlang:node/0 Dst=d => node Dst

bif1 Fail Bif=u$bif:erlang:get/1 Src=s Dst=d => i_get Src Dst

bif2 Jump=j u$bif:erlang:element/2 S1=s S2=rxy Dst=d => gen_element(Jump, S1, S2, Dst)

bif1 Fail Bif Literal=q Dst => move Literal x | bif1 Fail Bif x Dst
bif1 p Bif S1 Dst => bif1_body Bif S1 Dst

bif1_body Bif Literal=q Dst => move Literal x | bif1_body Bif x Dst

bif2 p Bif S1 S2 Dst => i_fetch S1 S2 | i_bif2_body Bif Dst
bif2 Fail Bif S1 S2 Dst => i_fetch S1 S2 | i_bif2 Fail Bif Dst

i_get s d

%macro: self Self
self r
self x
self y

%macro: node Node
node r
node x
%cold
node y
%hot

i_fast_element r j I d
i_fast_element x j I d
i_fast_element y j I d

i_element r j s d
i_element x j s d
i_element y j s d

bif1 f b s d
bif1_body b s d
i_bif2 f b d
i_bif2_body b d

#
# Internal calls.
#

move S=c r | call Ar P=f => i_move_call S r P
move S=s r | call Ar P=f => move_call S r P

i_move_call c r f

%macro:move_call MoveCall -arg_f -size -nonext
move_call/3

move_call x r f
move_call y r f

move S=c r | call_last Ar P=f D => i_move_call_last P D S r
move S r | call_last Ar P=f D => move_call_last S r P D

i_move_call_last f P c r

%macro:move_call_last MoveCallLast -arg_f -nonext -pack

move_call_last/4
move_call_last x r f Q
move_call_last y r f Q

move S=c r | call_only Ar P=f => i_move_call_only P S r
move S=x r | call_only Ar P=f => move_call_only S r P

i_move_call_only f c r

%macro:move_call_only MoveCallOnly -arg_f -nonext
move_call_only/3

move_call_only x r f

call Ar Func        => i_call Func
call_last Ar Func D => i_call_last Func D
call_only Ar Func   => i_call_only Func

i_call f
i_call_last f P
i_call_only f

i_call_ext e
i_call_ext_last e P
i_call_ext_only e

i_move_call_ext c r e
i_move_call_ext_last e P c r
i_move_call_ext_only e c r

# Fun calls.

call_fun Arity | deallocate D | return => i_call_fun_last Arity D
call_fun Arity => i_call_fun Arity

i_call_fun I
i_call_fun_last I P

make_fun2 OldIndex=u => gen_make_fun2(OldIndex)

%macro: i_make_fun MakeFun -pack
%cold
i_make_fun I t
%hot

%macro: is_function IsFunction -fail_action
is_function f x
is_function f y
is_function f r
is_function Fail=f c => jump Fail

func_info M F A => i_func_info u M F A

# ================================================================
# New bit syntax matching (R11B).
# ================================================================

%cold
bs_start_match2 Fail=f ica X Y D => jump Fail
bs_start_match2 Fail Bin X Y D => i_bs_start_match2 Bin Fail X Y D
i_bs_start_match2 r f I I d
i_bs_start_match2 x f I I d
i_bs_start_match2 y f I I d

bs_save2 Reg Index => gen_bs_save(Reg, Index)
i_bs_save2 r I
i_bs_save2 x I

bs_restore2 Reg Index => gen_bs_restore(Reg, Index)
i_bs_restore2 r I
i_bs_restore2 x I

# Matching integers
bs_match_string Fail Ms Bits Val => i_bs_match_string Ms Fail Bits Val

i_bs_match_string r f I I
i_bs_match_string x f I I

# Fetching integers from binaries.
bs_get_integer2 Fail=f Ms=rx Live=u Sz=sq Unit=u Flags=u Dst=d => \
			gen_get_integer2(Fail, Ms, Live, Sz, Unit, Flags, Dst)

i_bs_get_integer_small_imm r I f I d
i_bs_get_integer_small_imm x I f I d
i_bs_get_integer_imm r I I f I d
i_bs_get_integer_imm x I I f I d
i_bs_get_integer f I I d
i_bs_get_integer_8 r f d
i_bs_get_integer_8 x f d
i_bs_get_integer_16 r f d
i_bs_get_integer_16 x f d
i_bs_get_integer_32 r f I d
i_bs_get_integer_32 x f I d

# Fetching binaries from binaries.
bs_get_binary2 Fail=f Ms=rx Live=u Sz=sq Unit=u Flags=u Dst=d => \
			gen_get_binary2(Fail, Ms, Live, Sz, Unit, Flags, Dst)

%macro: i_bs_get_binary_imm2 BsGetBinaryImm_2 -fail_action -gen_dest
%macro: i_bs_get_binary2 BsGetBinary_2 -fail_action -gen_dest
%macro: i_bs_get_binary_all2 BsGetBinaryAll_2 -fail_action -gen_dest

i_bs_get_binary_imm2 f r I I I d
i_bs_get_binary_imm2 f x I I I d
i_bs_get_binary2 f r I s I d
i_bs_get_binary2 f x I s I d
i_bs_get_binary_all2 f r I I d
i_bs_get_binary_all2 f x I I d
i_bs_get_binary_all_reuse r f I
i_bs_get_binary_all_reuse x f I

# Fetching float from binaries.
bs_get_float2 Fail=f Ms=rx Live=u Sz=s Unit=u Flags=u Dst=d => \
		gen_get_float2(Fail, Ms, Live, Sz, Unit, Flags, Dst)

bs_get_float2 Fail=f Ms=rx Live=u Sz=q Unit=u Flags=u Dst=d => jump Fail

%macro: i_bs_get_float2 BsGetFloat2 -fail_action -gen_dest
i_bs_get_float2 f r I s I d
i_bs_get_float2 f x I s I d

# Miscellanous

bs_skip_bits2 Fail=f Ms=rx Sz=s Unit=u Flags=u => \
			gen_skip_bits2(Fail, Ms, Sz, Unit, Flags)
bs_skip_bits2 Fail=f Ms=rx Sz=q Unit=u Flags=u => \
			gen_skip_bits2(Fail, Ms, Sz, Unit, Flags)

%macro: i_bs_skip_bits_imm2 BsSkipBitsImm2 -fail_action
i_bs_skip_bits_imm2 f r I
i_bs_skip_bits_imm2 f x I

%macro: i_bs_skip_bits2 BsSkipBits2 -fail_action
i_bs_skip_bits2 f r x I
i_bs_skip_bits2 f r y I
i_bs_skip_bits2 f x x I
i_bs_skip_bits2 f x r I
i_bs_skip_bits2 f x y I

%macro: i_bs_skip_bits_all2 BsSkipBitsAll2 -fail_action
i_bs_skip_bits_all2 f r I
i_bs_skip_bits_all2 f x I 

bs_test_tail2 Fail=f Ms=rx Bits=u==0 => bs_test_zero_tail2 Fail Ms
bs_test_tail2 Fail=f Ms=rx Bits=u => bs_test_tail_imm2 Fail Ms Bits
bs_test_zero_tail2 f r
bs_test_zero_tail2 f x
bs_test_tail_imm2 f r I
bs_test_tail_imm2 f x I

bs_test_unit F Ms Unit=u==8 => bs_test_unit8 F Ms
bs_test_unit f r I
bs_test_unit f x I
bs_test_unit8 f r
bs_test_unit8 f x

bs_context_to_binary r
bs_context_to_binary x
bs_context_to_binary y

#
# Utf8/utf16/utf32 support. (R12B-5)
#
bs_get_utf8 Fail=f Ms=rx u u Dst=d => i_bs_get_utf8 Ms Fail Dst
i_bs_get_utf8 r f d
i_bs_get_utf8 x f d

bs_skip_utf8 Fail=f Ms=rx u u => i_bs_get_utf8 Ms Fail x

bs_get_utf16 Fail=f Ms=rx u Flags=u Dst=d => i_bs_get_utf16 Ms Fail Flags Dst
bs_skip_utf16 Fail=f Ms=rx u Flags=u => i_bs_get_utf16 Ms Fail Flags x

i_bs_get_utf16 r f I d
i_bs_get_utf16 x f I d

bs_get_utf32 Fail=f Ms=rx Live=u Flags=u Dst=d => \
	bs_get_integer2 Fail Ms Live i=32 u=1 Flags Dst | \
	i_fetch Dst Ms | \
	i_bs_validate_unicode_retract Fail
bs_skip_utf32 Fail=f Ms=rx Live=u Flags=u => \
	bs_get_integer2 Fail Ms Live i=32 u=1 Flags x | \
	i_fetch x Ms | \
	i_bs_validate_unicode_retract Fail

i_bs_validate_unicode_retract j
%hot

#
# Constructing binaries
#
%cold

bs_init2 Fail Sz Words Regs Flags Dst | binary_too_big(Sz) => system_limit Fail

bs_init2 Fail Sz=u Words=u==0 Regs Flags Dst | should_gen_heap_bin(Sz) => \
	i_bs_init_heap_bin Sz Regs Dst
bs_init2 Fail Sz=u Words=u==0 Regs Flags Dst => i_bs_init Sz Regs Dst

bs_init2 Fail Sz=u Words Regs Flags Dst | should_gen_heap_bin(Sz) => \
	i_bs_init_heap_bin_heap Sz Words Regs Dst
bs_init2 Fail Sz=u Words Regs Flags Dst => \
   i_bs_init_heap Sz Words Regs Dst

bs_init2 Fail Sz Words=u==0 Regs Flags Dst => \
  i_bs_init_fail Sz Fail Regs Dst
bs_init2 Fail Sz Words Regs Flags Dst => \
  i_fetch Sz r | i_bs_init_fail_heap Words Fail Regs Dst

i_bs_init_fail r j I d
i_bs_init_fail x j I d
i_bs_init_fail y j I d

i_bs_init_fail_heap I j I d

i_bs_init I I d
i_bs_init_heap_bin I I d

i_bs_init_heap I I I d
i_bs_init_heap_bin_heap I I I d


bs_init_bits Fail Sz=o Words Regs Flags Dst => system_limit Fail

bs_init_bits Fail Sz=u Words=u==0 Regs Flags Dst => i_bs_init_bits Sz Regs Dst
bs_init_bits Fail Sz=u Words Regs Flags Dst =>  i_bs_init_bits_heap Sz Words Regs Dst

bs_init_bits Fail Sz Words=u==0 Regs Flags Dst => \
  i_bs_init_bits_fail Sz Fail Regs Dst
bs_init_bits Fail Sz Words Regs Flags Dst => \
  i_fetch Sz r | i_bs_init_bits_fail_heap Words Fail Regs Dst

i_bs_init_bits_fail r j I d
i_bs_init_bits_fail x j I d
i_bs_init_bits_fail y j I d

i_bs_init_bits_fail_heap I j I d

i_bs_init_bits I I d
i_bs_init_bits_heap I I I d

bs_add Fail S1=i==0 S2 Unit=u==1 D => move S2 D
bs_add Fail S1 S2 Unit D => i_fetch S1 S2 | i_bs_add Fail Unit D

i_bs_add j I d

bs_append Fail Size Extra Live Unit Bin Flags Dst => \
  i_fetch Size Bin | i_bs_append Fail Extra Live Unit Dst

bs_private_append Fail Size Unit Bin Flags Dst => \
  i_fetch Size Bin | i_bs_private_append Fail Unit Dst

bs_init_writable

i_bs_append j I I I d
i_bs_private_append j I d

#
# Storing integers into binaries.
#

bs_put_integer Fail=j Sz=s Unit=u Flags=u Literal=q => \
	move Literal x | bs_put_integer Fail Sz Unit Flags x
bs_put_integer Fail=j Sz=sq Unit=u Flags=u Src=s => \
			gen_put_integer(Fail, Sz, Unit, Flags, Src)

%macro: i_new_bs_put_integer NewBsPutInteger
%macro: i_new_bs_put_integer_imm NewBsPutIntegerImm

i_new_bs_put_integer j s I s
i_new_bs_put_integer_imm j I I s

#
# Utf8/utf16/utf32 support. (R12B-5)
#

bs_utf8_size Fail Literal=q Dst=d => \
	move Literal x | bs_utf8_size Fail x Dst
bs_utf8_size j Src=s Dst=d => i_bs_utf8_size Src Dst

i_bs_utf8_size s d

bs_utf16_size Fail Literal=q Dst=d => \
	move Literal x | bs_utf16_size Fail x Dst
bs_utf16_size j Src=s Dst=d => i_bs_utf16_size Src Dst

i_bs_utf16_size s d

bs_put_utf8 Fail=j Flags=u Literal=q => \
	move Literal x | bs_put_utf8 Fail Flags x
bs_put_utf8 Fail u Src=s => i_bs_put_utf8 Fail Src

i_bs_put_utf8 j s

bs_put_utf16 Fail=j Flags=u Literal=q => \
	move Literal x | bs_put_utf16 Fail Flags x
bs_put_utf16 Fail Flags=u Src=s => i_bs_put_utf16 Fail Flags Src

i_bs_put_utf16 j I s

bs_put_utf32 Fail=j Flags=u Literal=q => \
	move Literal x | bs_put_utf32 Fail Flags x
bs_put_utf32 Fail=j Flags=u Src=s => \
   i_bs_validate_unicode Fail Src | bs_put_integer Fail i=32 u=1 Flags Src

i_bs_validate_unicode j s

#
# Storing floats into binaries.
#
bs_put_float Fail Sz=q Unit Flags Val => badarg Fail

bs_put_float Fail=j Sz Unit=u Flags=u Literal=q => \
	move Literal x | bs_put_float Fail Sz Unit Flags x

bs_put_float Fail=j Sz=s Unit=u Flags=u Src=s => \
			gen_put_float(Fail, Sz, Unit, Flags, Src)

%macro: i_new_bs_put_float NewBsPutFloat
%macro: i_new_bs_put_float_imm NewBsPutFloatImm

i_new_bs_put_float j s I s
i_new_bs_put_float_imm j I I s

#
# Storing binaries into binaries.
#

bs_put_binary Fail Sz Unit Flags Literal=q => \
 	move Literal x | bs_put_binary Fail Sz Unit Flags x
bs_put_binary Fail=j Sz=s Unit=u Flags=u Src=s => \
			gen_put_binary(Fail, Sz, Unit, Flags, Src)

%macro: i_new_bs_put_binary NewBsPutBinary
i_new_bs_put_binary j s I s

%macro: i_new_bs_put_binary_imm NewBsPutBinaryImm
i_new_bs_put_binary_imm j I s

%macro: i_new_bs_put_binary_all NewBsPutBinaryAll
i_new_bs_put_binary_all j s I

#
# Warning: The i_bs_put_string and i_new_bs_put_string instructions
# are specially treated in the loader.
# Don't change the instruction format unless you change the loader too.
#

bs_put_string I I

%hot

#
# New floating point instructions (R8).
#

fadd p FR1 FR2 FR3 => i_fadd FR1 FR2 FR3
fsub p FR1 FR2 FR3 => i_fsub FR1 FR2 FR3
fmul p FR1 FR2 FR3 => i_fmul FR1 FR2 FR3
fdiv p FR1 FR2 FR3 => i_fdiv FR1 FR2 FR3
fnegate p FR1 FR2 => i_fnegate FR1 FR2

fconv Arg=iqan Dst=l => move Arg x | fconv x Dst

fmove q l
fmove d l
fmove l d

fconv d l

i_fadd l l l
i_fsub l l l
i_fmul l l l
i_fdiv l l l
i_fnegate l l

fclearerror | no_fpe_signals() =>
fcheckerror p | no_fpe_signals() =>
fcheckerror p => i_fcheckerror

i_fcheckerror
fclearerror

#
# New apply instructions in R10B.
#

apply I
apply_last I P

#
# Map instructions in R17.
#

put_map_assoc j Map Dst Live Size Rest=* | is_empty_map(Map) => \
   new_map Dst Live Size Rest
put_map_assoc F Src=s Dst Live Size Rest=* => \
	       update_map_assoc F Src Dst Live Size Rest
put_map_assoc F Src Dst Live Size Rest=* => \
	       move Src x | update_map_assoc F x Dst Live Size Rest

put_map_exact F Src=s Dst Live Size Rest=* => \
	      update_map_exact F Src Dst Live Size Rest
put_map_exact F Src Dst Live Size Rest=* => \
	      move Src x | update_map_exact F x Dst Live Size Rest

new_map d I I
update_map_assoc j s d I I
update_map_exact j s d I I

is_map Fail Lit=q | literal_is_map(Lit) =>
is_map Fail cq => jump Fail

%macro: is_map IsMap -fail_action
is_map f r
is_map f x
is_map f y

## Transform has_map_fields #{ K1 := _, K2 := _ } to has_map_elements

has_map_fields Fail Src Size Rest=* => \
   gen_has_map_fields(Fail, Src, Size, Rest)

## Transform get_map_elements(s) #{ K1 := V1, K2 := V2 }

get_map_element/4

get_map_elements Fail Src=rxy Size=u==2 Rest=* => gen_get_map_element(Fail,Src,Size,Rest)
get_map_elements Fail Src Size Rest=* => i_get_map_elements Fail Src Size Rest

i_get_map_elements f s I

get_map_element Fail Src=rxy Key=ax Dst => i_get_map_element Fail Src Key Dst
get_map_element Fail Src=rxy Key=rycq Dst => \
    move Key x | i_get_map_element Fail Src x Dst
get_map_element Fail Src Key Dst => jump Fail

%macro: i_get_map_element GetMapElement -fail_action
i_get_map_element f r a r
i_get_map_element f x a r
i_get_map_element f y a r
i_get_map_element f r a x
i_get_map_element f x a x
i_get_map_element f y a x
i_get_map_element f r a y
i_get_map_element f x a y
i_get_map_element f y a y
i_get_map_element f r x r
i_get_map_element f x x r
i_get_map_element f y x r
i_get_map_element f r x x
i_get_map_element f x x x
i_get_map_element f y x x
i_get_map_element f r x y
i_get_map_element f x x y
i_get_map_element f y x y

#
# Optimize addition and subtraction of small literals using
# the i_increment/4 instruction (in bodies, not in guards).
#

gc_bif2 p Live u$bif:erlang:splus/2 Int=i Reg=d Dst => \
	gen_increment(Reg, Int, Live, Dst)
gc_bif2 p Live u$bif:erlang:splus/2 Reg=d Int=i Dst => \
	gen_increment(Reg, Int, Live, Dst)

gc_bif2 p Live u$bif:erlang:sminus/2 Reg=d Int=i Dst | \
	negation_is_small(Int) => \
	gen_increment_from_minus(Reg, Int, Live, Dst)

#
# GCing arithmetic instructions.
#

gc_bif2 Fail I u$bif:erlang:splus/2 S1 S2 Dst=d => i_fetch S1 S2 | i_plus Fail I Dst
gc_bif2 Fail I u$bif:erlang:sminus/2 S1 S2 Dst=d => i_fetch S1 S2 | i_minus Fail I Dst
gc_bif2 Fail I u$bif:erlang:stimes/2 S1 S2 Dst=d => i_fetch S1 S2 | i_times Fail I Dst
gc_bif2 Fail I u$bif:erlang:div/2 S1 S2 Dst=d => i_fetch S1 S2 | i_m_div Fail I Dst

gc_bif2 Fail I u$bif:erlang:intdiv/2 S1 S2 Dst=d => i_fetch S1 S2 | i_int_div Fail I Dst
gc_bif2 Fail I u$bif:erlang:rem/2 S1 S2 Dst=d => i_fetch S1 S2 | i_rem Fail I Dst

gc_bif2 Fail I u$bif:erlang:bsl/2 S1 S2 Dst=d => i_fetch S1 S2 | i_bsl Fail I Dst
gc_bif2 Fail I u$bif:erlang:bsr/2 S1 S2 Dst=d => i_fetch S1 S2 | i_bsr Fail I Dst

gc_bif2 Fail I u$bif:erlang:band/2 S1 S2 Dst=d => i_fetch S1 S2 | i_band Fail I Dst
gc_bif2 Fail I u$bif:erlang:bor/2 S1 S2 Dst=d => i_fetch S1 S2 | i_bor Fail I Dst
gc_bif2 Fail I u$bif:erlang:bxor/2 S1 S2 Dst=d => i_fetch S1 S2 | i_bxor Fail I Dst

gc_bif1 Fail I u$bif:erlang:bnot/1 Src Dst=d => i_int_bnot Fail Src I Dst

gc_bif1 Fail I u$bif:erlang:sminus/1 Src Dst=d => i_fetch i Src | i_minus Fail I Dst
gc_bif1 Fail I u$bif:erlang:splus/1 Src Dst=d => i_fetch i Src | i_plus Fail I Dst

i_increment r I I d
i_increment x I I d
i_increment y I I d

i_plus j I d
i_minus j I d
i_times j I d
i_m_div j I d
i_int_div j I d
i_rem j I d

i_bsl j I d
i_bsr j I d

i_band j I d
i_bor j I d
i_bxor j I d

i_int_bnot j s I d

#
# Old guard BIFs that creates heap fragments are no longer allowed.
#
bif1 Fail u$bif:erlang:length/1 s d => too_old_compiler
bif1 Fail u$bif:erlang:size/1 s d => too_old_compiler
bif1 Fail u$bif:erlang:abs/1 s d => too_old_compiler
bif1 Fail u$bif:erlang:float/1 s d => too_old_compiler
bif1 Fail u$bif:erlang:round/1 s d => too_old_compiler
bif1 Fail u$bif:erlang:trunc/1 s d => too_old_compiler

#
# Guard BIFs.
#
gc_bif1 Fail I Bif Src Dst => \
	gen_guard_bif1(Fail, I, Bif, Src, Dst)

gc_bif2 Fail I Bif S1 S2 Dst => \
	gen_guard_bif2(Fail, I, Bif, S1, S2, Dst)

gc_bif3 Fail I Bif S1 S2 S3 Dst => \
	gen_guard_bif3(Fail, I, Bif, S1, S2, S3, Dst)

i_gc_bif1 Fail Bif V=q Live D => move V x | i_gc_bif1 Fail Bif x Live D

i_gc_bif1 j I s I d

ii_gc_bif2/6

ii_gc_bif2 Fail Bif S1 S2 Live D => i_fetch S1 S2 | i_gc_bif2 Fail Bif Live D

i_gc_bif2 j I I d

ii_gc_bif3/7

ii_gc_bif3 Fail Bif S1 S2 S3 Live D => move S1 x | i_fetch S2 S3 | i_gc_bif3 Fail Bif x Live D

i_gc_bif3 j I s I d

#
# The following instruction is specially handled in beam_load.c
# to produce a user-friendly message if an unsupported guard BIF is
# encountered.
#
unsupported_guard_bif/3
unsupported_guard_bif A B C | never() =>

#
# R13B03
#
on_load

#
# R14A.
#
recv_mark f

recv_set Fail | label Lbl | loop_rec Lf Reg => \
   i_recv_set | label Lbl | loop_rec Lf Reg
i_recv_set