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The biggie: changed the funcdesc environments used for opcode descriptions 

to use the opcodedesc environment.

Changed a \code{} to a \file{} near the start where a file is referenced.

Fixed a typo:  "on" --> "one" in ROT_THREE description.

Wherever opcodes were referenced by name, use \code{OPCODE_NAME}; usage was
inconsistent.  Ideally, another macro would be defined since these don't
represent code a programmer would type, but that's minor even for me.  It'll
probably get converted automatically in the SGML conversion project.  Whether
that matters or not isn't relevant at this point.
This commit is contained in:
Fred Drake 1997-12-03 04:06:57 +00:00
parent a610f9f8c1
commit 456035f4b1
2 changed files with 352 additions and 350 deletions
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351
Doc/lib/libdis.tex
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@ -7,7 +7,7 @@ The \code{dis} module supports the analysis of Python byte code by
disassembling it. Since there is no Python assembler, this module disassembling it. Since there is no Python assembler, this module
defines the Python assembly language. The Python byte code which defines the Python assembly language. The Python byte code which
this module takes as an input is defined in the file this module takes as an input is defined in the file
\code{Include/opcode.h} and used by the compiler and the interpreter. \file{Include/opcode.h} and used by the compiler and the interpreter.
Example: Given the function myfunc Example: Given the function myfunc
@ -16,7 +16,7 @@ def myfunc(alist):
return len(alist) return len(alist)
\end{verbatim}\ecode \end{verbatim}\ecode
the following command can be used to get the disassembly of myfunc: the following command can be used to get the disassembly of \code{myfunc()}:
\begin{verbatim} \begin{verbatim}
>>> dis.dis(myfunc) >>> dis.dis(myfunc)
@ -123,384 +123,385 @@ instructions.
\renewcommand{\indexsubitem}{(byte code insns)} \renewcommand{\indexsubitem}{(byte code insns)}
\begin{funcdesc}{STOP_CODE}{} \begin{opcodedesc}{STOP_CODE}{}
Indicates end-of-code to the compiler, not used by the interpreter. Indicates end-of-code to the compiler, not used by the interpreter.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{POP_TOP}{} \begin{opcodedesc}{POP_TOP}{}
Removes the top-of-stack (TOS) item. Removes the top-of-stack (TOS) item.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{ROT_TWO}{} \begin{opcodedesc}{ROT_TWO}{}
Swaps the two top-most stack items. Swaps the two top-most stack items.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{ROT_THREE}{} \begin{opcodedesc}{ROT_THREE}{}
Lifts second and third stack item on position up, moves top down Lifts second and third stack item one position up, moves top down
to position three. to position three.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DUP_TOP}{} \begin{opcodedesc}{DUP_TOP}{}
Duplicates the reference on top of the stack. Duplicates the reference on top of the stack.
\end{funcdesc} \end{opcodedesc}
Unary Operations take the top of the stack, apply the operation, and Unary Operations take the top of the stack, apply the operation, and
push the result back on the stack. push the result back on the stack.
\begin{funcdesc}{UNARY_POSITIVE}{} \begin{opcodedesc}{UNARY_POSITIVE}{}
Implements \code{TOS = +TOS}. Implements \code{TOS = +TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_NEG}{} \begin{opcodedesc}{UNARY_NEG}{}
Implements \code{TOS = -TOS}. Implements \code{TOS = -TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_NOT}{} \begin{opcodedesc}{UNARY_NOT}{}
Implements \code{TOS = not TOS}. Implements \code{TOS = not TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_CONVERT}{} \begin{opcodedesc}{UNARY_CONVERT}{}
Implements \code{TOS = `TOS`}. Implements \code{TOS = `TOS`}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_INVERT}{} \begin{opcodedesc}{UNARY_INVERT}{}
Implements \code{TOS = ~TOS}. Implements \code{TOS = ~TOS}.
\end{funcdesc} \end{opcodedesc}
Binary operations remove the top of the stack (TOS) and the second top-most Binary operations remove the top of the stack (TOS) and the second top-most
stack item (TOS1) from the stack. They perform the operation, and put the stack item (TOS1) from the stack. They perform the operation, and put the
result back on the stack. result back on the stack.
\begin{funcdesc}{BINARY_POWER}{} \begin{opcodedesc}{BINARY_POWER}{}
Implements \code{TOS = TOS1 ** TOS}. Implements \code{TOS = TOS1 ** TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_MULTIPLY}{} \begin{opcodedesc}{BINARY_MULTIPLY}{}
Implements \code{TOS = TOS1 * TOS}. Implements \code{TOS = TOS1 * TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_DIVIDE}{} \begin{opcodedesc}{BINARY_DIVIDE}{}
Implements \code{TOS = TOS1 / TOS}. Implements \code{TOS = TOS1 / TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_MODULO}{} \begin{opcodedesc}{BINARY_MODULO}{}
Implements \code{TOS = TOS1 \% TOS}. Implements \code{TOS = TOS1 \% TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_ADD}{} \begin{opcodedesc}{BINARY_ADD}{}
Implements \code{TOS = TOS1 + TOS}. Implements \code{TOS = TOS1 + TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_SUBTRACT}{} \begin{opcodedesc}{BINARY_SUBTRACT}{}
Implements \code{TOS = TOS1 - TOS}. Implements \code{TOS = TOS1 - TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_SUBSCR}{} \begin{opcodedesc}{BINARY_SUBSCR}{}
Implements \code{TOS = TOS1[TOS] }. Implements \code{TOS = TOS1[TOS] }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_LSHIFT}{} \begin{opcodedesc}{BINARY_LSHIFT}{}
Implements \code{TOS = TOS1 << TOS }. Implements \code{TOS = TOS1 << TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_RSHIFT}{} \begin{opcodedesc}{BINARY_RSHIFT}{}
Implements \code{TOS = TOS1 << TOS }. Implements \code{TOS = TOS1 << TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_AND}{} \begin{opcodedesc}{BINARY_AND}{}
Implements \code{TOS = TOS1 and TOS }. Implements \code{TOS = TOS1 and TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_XOR}{} \begin{opcodedesc}{BINARY_XOR}{}
Implements \code{TOS = TOS1 \^{ }TOS }. Implements \code{TOS = TOS1 \^{ }TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_OR}{} \begin{opcodedesc}{BINARY_OR}{}
Implements \code{TOS = TOS1 or TOS }. Implements \code{TOS = TOS1 or TOS }.
\end{funcdesc} \end{opcodedesc}
The slice opcodes take up to three parameters. The slice opcodes take up to three parameters.
\begin{funcdesc}{SLICE+0}{} \begin{opcodedesc}{SLICE+0}{}
Implements \code{TOS = TOS[:]}. Implements \code{TOS = TOS[:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SLICE+1}{} \begin{opcodedesc}{SLICE+1}{}
Implements \code{TOS = TOS1[TOS:]}. Implements \code{TOS = TOS1[TOS:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SLICE+2}{} \begin{opcodedesc}{SLICE+2}{}
Implements \code{TOS = TOS1[:TOS1]}. Implements \code{TOS = TOS1[:TOS1]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SLICE+3}{} \begin{opcodedesc}{SLICE+3}{}
Implements \code{TOS = TOS2[TOS1:TOS]}. Implements \code{TOS = TOS2[TOS1:TOS]}.
\end{funcdesc} \end{opcodedesc}
Slice assignment needs even an additional parameter. As any statement, Slice assignment needs even an additional parameter. As any statement,
they put nothing on the stack. they put nothing on the stack.
\begin{funcdesc}{STORE_SLICE+0}{} \begin{opcodedesc}{STORE_SLICE+0}{}
Implements \code{TOS[:]=TOS1}. Implements \code{TOS[:]=TOS1}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SLICE+1}{} \begin{opcodedesc}{STORE_SLICE+1}{}
Implements \code{TOS1[TOS:]=TOS2}. Implements \code{TOS1[TOS:]=TOS2}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SLICE+2}{} \begin{opcodedesc}{STORE_SLICE+2}{}
Implements \code{TOS1[:TOS]=TOS2}. Implements \code{TOS1[:TOS]=TOS2}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SLICE+3}{} \begin{opcodedesc}{STORE_SLICE+3}{}
Implements \code{TOS2[TOS1:TOS]=TOS3}. Implements \code{TOS2[TOS1:TOS]=TOS3}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+0}{} \begin{opcodedesc}{DELETE_SLICE+0}{}
Implements \code{del TOS[:]}. Implements \code{del TOS[:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+1}{} \begin{opcodedesc}{DELETE_SLICE+1}{}
Implements \code{del TOS1[TOS:]}. Implements \code{del TOS1[TOS:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+2}{} \begin{opcodedesc}{DELETE_SLICE+2}{}
Implements \code{del TOS1[:TOS]}. Implements \code{del TOS1[:TOS]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+3}{} \begin{opcodedesc}{DELETE_SLICE+3}{}
Implements \code{del TOS2[TOS1:TOS]}. Implements \code{del TOS2[TOS1:TOS]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SUBSCR}{} \begin{opcodedesc}{STORE_SUBSCR}{}
Implements \code{TOS1[TOS]=TOS2}. Implements \code{TOS1[TOS]=TOS2}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SUBSCR}{} \begin{opcodedesc}{DELETE_SUBSCR}{}
Implements \code{del TOS1[TOS]}. Implements \code{del TOS1[TOS]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{PRINT_EXPR}{} \begin{opcodedesc}{PRINT_EXPR}{}
Implements the expression statement for the interactive mode. TOS is Implements the expression statement for the interactive mode. TOS is
removed from the stack and printed. In non-interactive mode, an removed from the stack and printed. In non-interactive mode, an
expression statement is terminated with POP_STACK. expression statement is terminated with \code{POP_STACK}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{PRINT_ITEM}{} \begin{opcodedesc}{PRINT_ITEM}{}
Prints TOS. There is one such instruction for Prints TOS. There is one such instruction for
each item in the print statement. each item in the print statement.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{PRINT_NEWLINE}{} \begin{opcodedesc}{PRINT_NEWLINE}{}
Prints a new line on \code{sys.stdout}. This is generated as the Prints a new line on \code{sys.stdout}. This is generated as the
last operation of a print statement, unless the statement ends last operation of a print statement, unless the statement ends
with a comma. with a comma.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BREAK_LOOP}{} \begin{opcodedesc}{BREAK_LOOP}{}
Terminates a loop due to a break statement. Terminates a loop due to a break statement.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_LOCALS}{} \begin{opcodedesc}{LOAD_LOCALS}{}
Pushes a reference to the locals of the current scope on the stack. Pushes a reference to the locals of the current scope on the stack.
This is used in the code for a class definition: After the class body This is used in the code for a class definition: After the class body
is evaluated, the locals are passed to the class definition. is evaluated, the locals are passed to the class definition.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{RETURN_VALUE}{} \begin{opcodedesc}{RETURN_VALUE}{}
Returns with TOS to the caller of the function. Returns with TOS to the caller of the function.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{EXEC_STMT}{} \begin{opcodedesc}{EXEC_STMT}{}
Implements \code{exec TOS2,TOS1,TOS}. The compiler fills Implements \code{exec TOS2,TOS1,TOS}. The compiler fills
missing optional parameters with None. missing optional parameters with None.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{POP_BLOCK}{} \begin{opcodedesc}{POP_BLOCK}{}
Removes one block from the block stack. Per frame, there is a Removes one block from the block stack. Per frame, there is a
stack of blocks, denoting nested loops, try statements, and such. stack of blocks, denoting nested loops, try statements, and such.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{END_FINALLY}{} \begin{opcodedesc}{END_FINALLY}{}
Terminates a finally-block. The interpreter recalls whether the Terminates a finally-block. The interpreter recalls whether the
exception has to be re-raised, or whether the function returns, exception has to be re-raised, or whether the function returns,
and continues with the outer-next block. and continues with the outer-next block.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_CLASS}{} \begin{opcodedesc}{BUILD_CLASS}{}
Creates a new class object. TOS is the methods dictionary, TOS1 Creates a new class object. TOS is the methods dictionary, TOS1
the tuple of the names of the base classes, and TOS2 the class name. the tuple of the names of the base classes, and TOS2 the class name.
\end{funcdesc} \end{opcodedesc}
All of the following opcodes expect arguments. An argument is two All of the following opcodes expect arguments. An argument is two
bytes, with the more significant byte last. bytes, with the more significant byte last.
\begin{funcdesc}{STORE_NAME}{namei} \begin{opcodedesc}{STORE_NAME}{namei}
Implements \code{name = TOS}. \var{namei} is the index of \var{name} Implements \code{name = TOS}. \var{namei} is the index of \var{name}
in the attribute \code{co_names} of the code object. in the attribute \code{co_names} of the code object.
The compiler tries to use STORE_LOCAL or STORE_GLOBAL if possible. The compiler tries to use \code{STORE_LOCAL} or \code{STORE_GLOBAL}
\end{funcdesc} if possible.
\end{opcodedesc}
\begin{funcdesc}{DELETE_NAME}{namei} \begin{opcodedesc}{DELETE_NAME}{namei}
Implements \code{del name}, where \var{namei} is the index into Implements \code{del name}, where \var{namei} is the index into
\code{co_names} attribute of the code object. \code{co_names} attribute of the code object.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNPACK_TUPLE}{count} \begin{opcodedesc}{UNPACK_TUPLE}{count}
Unpacks TOS into \var{count} individual values, which are put onto Unpacks TOS into \var{count} individual values, which are put onto
the stack right-to-left. the stack right-to-left.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNPACK_LIST}{count} \begin{opcodedesc}{UNPACK_LIST}{count}
Unpacks TOS into \var{count} individual values. Unpacks TOS into \var{count} individual values.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{UNPACK_ARG}{count} %\begin{opcodedesc}{UNPACK_ARG}{count}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{STORE_ATTR}{namei} \begin{opcodedesc}{STORE_ATTR}{namei}
Implements \code{TOS.name = TOS1}, where \var{namei} is the index Implements \code{TOS.name = TOS1}, where \var{namei} is the index
of name in \code{co_names}. of name in \code{co_names}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_ATTR}{namei} \begin{opcodedesc}{DELETE_ATTR}{namei}
Implements \code{del TOS.name}, using \var{namei} as index into Implements \code{del TOS.name}, using \var{namei} as index into
\code{co_names}. \code{co_names}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_GLOBAL}{namei} \begin{opcodedesc}{STORE_GLOBAL}{namei}
Works as STORE_NAME, but stores the name as a global. Works as \code{STORE_NAME}, but stores the name as a global.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_GLOBAL}{namei} \begin{opcodedesc}{DELETE_GLOBAL}{namei}
Works as DELETE_NAME, but deletes a global name. Works as \code{DELETE_NAME}, but deletes a global name.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{UNPACK_VARARG}{argc} %\begin{opcodedesc}{UNPACK_VARARG}{argc}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{LOAD_CONST}{consti} \begin{opcodedesc}{LOAD_CONST}{consti}
Pushes \code{co_consts[consti]} onto the stack. Pushes \code{co_consts[consti]} onto the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_NAME}{namei} \begin{opcodedesc}{LOAD_NAME}{namei}
Pushes the value associated with \code{co_names[namei]} onto the stack. Pushes the value associated with \code{co_names[namei]} onto the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_TUPLE}{count} \begin{opcodedesc}{BUILD_TUPLE}{count}
Creates a tuple consuming \var{count} items from the stack, and pushes Creates a tuple consuming \var{count} items from the stack, and pushes
the resulting tuple onto the stack. the resulting tuple onto the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_LIST}{count} \begin{opcodedesc}{BUILD_LIST}{count}
Works as \code{BUILD_TUPLE}, but creates a list. Works as \code{BUILD_TUPLE}, but creates a list.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_MAP}{zero} \begin{opcodedesc}{BUILD_MAP}{zero}
Pushes an empty dictionary object onto the stack. The argument is ignored Pushes an empty dictionary object onto the stack. The argument is ignored
and set to zero by the compiler. and set to zero by the compiler.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_ATTR}{namei} \begin{opcodedesc}{LOAD_ATTR}{namei}
Replaces TOS with \code{getattr(TOS,co_names[namei]}. Replaces TOS with \code{getattr(TOS,co_names[namei]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{COMPARE_OP}{opname} \begin{opcodedesc}{COMPARE_OP}{opname}
Performs a boolean operation. The operation name can be found Performs a boolean operation. The operation name can be found
in \code{cmp_op[opname]}. in \code{cmp_op[opname]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{IMPORT_NAME}{namei} \begin{opcodedesc}{IMPORT_NAME}{namei}
Imports the module \code{co_names[namei]}. The module object is Imports the module \code{co_names[namei]}. The module object is
pushed onto the stack. The current name space is not affect: for a pushed onto the stack. The current name space is not affect: for a
proper import statement, a subsequent \code{STORE_FAST} instruction proper import statement, a subsequent \code{STORE_FAST} instruction
modifies the name space. modifies the name space.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{IMPORT_FROM}{namei} \begin{opcodedesc}{IMPORT_FROM}{namei}
Imports the attribute \code{co_names[namei]}. The module to import Imports the attribute \code{co_names[namei]}. The module to import
from is found in TOS and left there. from is found in TOS and left there.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_FORWARD}{delta} \begin{opcodedesc}{JUMP_FORWARD}{delta}
Increments byte code counter by \var{delta}. Increments byte code counter by \var{delta}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_IF_TRUE}{delta} \begin{opcodedesc}{JUMP_IF_TRUE}{delta}
If TOS is true, increment the byte code counter by \var{delta}. TOS is If TOS is true, increment the byte code counter by \var{delta}. TOS is
left on the stack. left on the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_IF_FALSE}{delta} \begin{opcodedesc}{JUMP_IF_FALSE}{delta}
If TOS is false, increment the byte code counter by \var{delta}. TOS If TOS is false, increment the byte code counter by \var{delta}. TOS
is not changed. is not changed.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_ABSOLUTE}{target} \begin{opcodedesc}{JUMP_ABSOLUTE}{target}
Set byte code counter to \var{target}. Set byte code counter to \var{target}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{FOR_LOOP}{delta} \begin{opcodedesc}{FOR_LOOP}{delta}
Iterate over a sequence. TOS is the current index, TOS1 the sequence. Iterate over a sequence. TOS is the current index, TOS1 the sequence.
First, the next element is computed. If the sequence is exhausted, First, the next element is computed. If the sequence is exhausted,
increment byte code counter by \var{delta}. Otherwise, push the increment byte code counter by \var{delta}. Otherwise, push the
sequence, the incremented counter, and the current item onto the stack. sequence, the incremented counter, and the current item onto the stack.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{LOAD_LOCAL}{namei} %\begin{opcodedesc}{LOAD_LOCAL}{namei}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{LOAD_GLOBAL}{namei} \begin{opcodedesc}{LOAD_GLOBAL}{namei}
Loads the global named \code{co_names[namei]} onto the stack. Loads the global named \code{co_names[namei]} onto the stack.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{SET_FUNC_ARGS}{argc} %\begin{opcodedesc}{SET_FUNC_ARGS}{argc}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{SETUP_LOOP}{delta} \begin{opcodedesc}{SETUP_LOOP}{delta}
Pushes a block for a loop onto the block stack. The block spans Pushes a block for a loop onto the block stack. The block spans
from the current instruction with a size of \var{delta} bytes. from the current instruction with a size of \var{delta} bytes.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SETUP_EXCEPT}{delta} \begin{opcodedesc}{SETUP_EXCEPT}{delta}
Pushes a try block from a try-except clause onto the block stack. Pushes a try block from a try-except clause onto the block stack.
\var{delta} points to the first except block. \var{delta} points to the first except block.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SETUP_FINALLY}{delta} \begin{opcodedesc}{SETUP_FINALLY}{delta}
Pushes a try block from a try-except clause onto the block stack. Pushes a try block from a try-except clause onto the block stack.
\var{delta} points to the finally block. \var{delta} points to the finally block.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_FAST}{var_num} \begin{opcodedesc}{LOAD_FAST}{var_num}
Pushes a reference to the local \code{co_varnames[var_num]} onto Pushes a reference to the local \code{co_varnames[var_num]} onto
the stack. the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_FAST}{var_num} \begin{opcodedesc}{STORE_FAST}{var_num}
Stores TOS into the local \code{co_varnames[var_num]}. Stores TOS into the local \code{co_varnames[var_num]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_FAST}{var_num} \begin{opcodedesc}{DELETE_FAST}{var_num}
Deletes local \code{co_varnames[var_num]}. Deletes local \code{co_varnames[var_num]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SET_LINE_NO}{lineno} \begin{opcodedesc}{SET_LINE_NO}{lineno}
Sets the current line number to \var{lineno}. Sets the current line number to \var{lineno}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{RAISE_VARARGS}{argc} \begin{opcodedesc}{RAISE_VARARGS}{argc}
Raises an exception. \var{argc} indicates the number of parameters Raises an exception. \var{argc} indicates the number of parameters
to the raise statement, ranging from 1 to 3. The handler will find to the raise statement, ranging from 1 to 3. The handler will find
the traceback as TOS2, the parameter as TOS1, and the exception the traceback as TOS2, the parameter as TOS1, and the exception
as TOS. as TOS.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{CALL_FUNCTION}{argc} \begin{opcodedesc}{CALL_FUNCTION}{argc}
Calls a function. The low byte of \var{argc} indicates the number of Calls a function. The low byte of \var{argc} indicates the number of
positional parameters, the high byte the number of keyword parameters. positional parameters, the high byte the number of keyword parameters.
On the stack, the opcode finds the keyword parameters first. For each On the stack, the opcode finds the keyword parameters first. For each
@ -508,17 +509,17 @@ keyword argument, the value is on top of the key. Below the keyword
parameters, the positional parameters are on the stack, with the parameters, the positional parameters are on the stack, with the
right-most parameter on top. Below the parameters, the function object right-most parameter on top. Below the parameters, the function object
to call is on the stack. to call is on the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{MAKE_FUNCTION}{argc} \begin{opcodedesc}{MAKE_FUNCTION}{argc}
Pushes a new function object on the stack. TOS is the code associated Pushes a new function object on the stack. TOS is the code associated
with the function. The function object is defined to have \var{argc} with the function. The function object is defined to have \var{argc}
default parameters, which are found below TOS. default parameters, which are found below TOS.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_SLICE}{argc} \begin{opcodedesc}{BUILD_SLICE}{argc}
Pushes a slice object on the stack. If \var{argc} is three, creates Pushes a slice object on the stack. If \var{argc} is three, creates
\code{TOS3[TOS2:TOS1:TOS]}. Otherwise, expects three arguments. \code{TOS3[TOS2:TOS1:TOS]}. Otherwise, expects three arguments.
\end{funcdesc} \end{opcodedesc}

351
Doc/libdis.tex
View File

@ -7,7 +7,7 @@ The \code{dis} module supports the analysis of Python byte code by
disassembling it. Since there is no Python assembler, this module disassembling it. Since there is no Python assembler, this module
defines the Python assembly language. The Python byte code which defines the Python assembly language. The Python byte code which
this module takes as an input is defined in the file this module takes as an input is defined in the file
\code{Include/opcode.h} and used by the compiler and the interpreter. \file{Include/opcode.h} and used by the compiler and the interpreter.
Example: Given the function myfunc Example: Given the function myfunc
@ -16,7 +16,7 @@ def myfunc(alist):
return len(alist) return len(alist)
\end{verbatim}\ecode \end{verbatim}\ecode
the following command can be used to get the disassembly of myfunc: the following command can be used to get the disassembly of \code{myfunc()}:
\begin{verbatim} \begin{verbatim}
>>> dis.dis(myfunc) >>> dis.dis(myfunc)
@ -123,384 +123,385 @@ instructions.
\renewcommand{\indexsubitem}{(byte code insns)} \renewcommand{\indexsubitem}{(byte code insns)}
\begin{funcdesc}{STOP_CODE}{} \begin{opcodedesc}{STOP_CODE}{}
Indicates end-of-code to the compiler, not used by the interpreter. Indicates end-of-code to the compiler, not used by the interpreter.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{POP_TOP}{} \begin{opcodedesc}{POP_TOP}{}
Removes the top-of-stack (TOS) item. Removes the top-of-stack (TOS) item.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{ROT_TWO}{} \begin{opcodedesc}{ROT_TWO}{}
Swaps the two top-most stack items. Swaps the two top-most stack items.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{ROT_THREE}{} \begin{opcodedesc}{ROT_THREE}{}
Lifts second and third stack item on position up, moves top down Lifts second and third stack item one position up, moves top down
to position three. to position three.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DUP_TOP}{} \begin{opcodedesc}{DUP_TOP}{}
Duplicates the reference on top of the stack. Duplicates the reference on top of the stack.
\end{funcdesc} \end{opcodedesc}
Unary Operations take the top of the stack, apply the operation, and Unary Operations take the top of the stack, apply the operation, and
push the result back on the stack. push the result back on the stack.
\begin{funcdesc}{UNARY_POSITIVE}{} \begin{opcodedesc}{UNARY_POSITIVE}{}
Implements \code{TOS = +TOS}. Implements \code{TOS = +TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_NEG}{} \begin{opcodedesc}{UNARY_NEG}{}
Implements \code{TOS = -TOS}. Implements \code{TOS = -TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_NOT}{} \begin{opcodedesc}{UNARY_NOT}{}
Implements \code{TOS = not TOS}. Implements \code{TOS = not TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_CONVERT}{} \begin{opcodedesc}{UNARY_CONVERT}{}
Implements \code{TOS = `TOS`}. Implements \code{TOS = `TOS`}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNARY_INVERT}{} \begin{opcodedesc}{UNARY_INVERT}{}
Implements \code{TOS = ~TOS}. Implements \code{TOS = ~TOS}.
\end{funcdesc} \end{opcodedesc}
Binary operations remove the top of the stack (TOS) and the second top-most Binary operations remove the top of the stack (TOS) and the second top-most
stack item (TOS1) from the stack. They perform the operation, and put the stack item (TOS1) from the stack. They perform the operation, and put the
result back on the stack. result back on the stack.
\begin{funcdesc}{BINARY_POWER}{} \begin{opcodedesc}{BINARY_POWER}{}
Implements \code{TOS = TOS1 ** TOS}. Implements \code{TOS = TOS1 ** TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_MULTIPLY}{} \begin{opcodedesc}{BINARY_MULTIPLY}{}
Implements \code{TOS = TOS1 * TOS}. Implements \code{TOS = TOS1 * TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_DIVIDE}{} \begin{opcodedesc}{BINARY_DIVIDE}{}
Implements \code{TOS = TOS1 / TOS}. Implements \code{TOS = TOS1 / TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_MODULO}{} \begin{opcodedesc}{BINARY_MODULO}{}
Implements \code{TOS = TOS1 \% TOS}. Implements \code{TOS = TOS1 \% TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_ADD}{} \begin{opcodedesc}{BINARY_ADD}{}
Implements \code{TOS = TOS1 + TOS}. Implements \code{TOS = TOS1 + TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_SUBTRACT}{} \begin{opcodedesc}{BINARY_SUBTRACT}{}
Implements \code{TOS = TOS1 - TOS}. Implements \code{TOS = TOS1 - TOS}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_SUBSCR}{} \begin{opcodedesc}{BINARY_SUBSCR}{}
Implements \code{TOS = TOS1[TOS] }. Implements \code{TOS = TOS1[TOS] }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_LSHIFT}{} \begin{opcodedesc}{BINARY_LSHIFT}{}
Implements \code{TOS = TOS1 << TOS }. Implements \code{TOS = TOS1 << TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_RSHIFT}{} \begin{opcodedesc}{BINARY_RSHIFT}{}
Implements \code{TOS = TOS1 << TOS }. Implements \code{TOS = TOS1 << TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_AND}{} \begin{opcodedesc}{BINARY_AND}{}
Implements \code{TOS = TOS1 and TOS }. Implements \code{TOS = TOS1 and TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_XOR}{} \begin{opcodedesc}{BINARY_XOR}{}
Implements \code{TOS = TOS1 \^{ }TOS }. Implements \code{TOS = TOS1 \^{ }TOS }.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BINARY_OR}{} \begin{opcodedesc}{BINARY_OR}{}
Implements \code{TOS = TOS1 or TOS }. Implements \code{TOS = TOS1 or TOS }.
\end{funcdesc} \end{opcodedesc}
The slice opcodes take up to three parameters. The slice opcodes take up to three parameters.
\begin{funcdesc}{SLICE+0}{} \begin{opcodedesc}{SLICE+0}{}
Implements \code{TOS = TOS[:]}. Implements \code{TOS = TOS[:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SLICE+1}{} \begin{opcodedesc}{SLICE+1}{}
Implements \code{TOS = TOS1[TOS:]}. Implements \code{TOS = TOS1[TOS:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SLICE+2}{} \begin{opcodedesc}{SLICE+2}{}
Implements \code{TOS = TOS1[:TOS1]}. Implements \code{TOS = TOS1[:TOS1]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SLICE+3}{} \begin{opcodedesc}{SLICE+3}{}
Implements \code{TOS = TOS2[TOS1:TOS]}. Implements \code{TOS = TOS2[TOS1:TOS]}.
\end{funcdesc} \end{opcodedesc}
Slice assignment needs even an additional parameter. As any statement, Slice assignment needs even an additional parameter. As any statement,
they put nothing on the stack. they put nothing on the stack.
\begin{funcdesc}{STORE_SLICE+0}{} \begin{opcodedesc}{STORE_SLICE+0}{}
Implements \code{TOS[:]=TOS1}. Implements \code{TOS[:]=TOS1}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SLICE+1}{} \begin{opcodedesc}{STORE_SLICE+1}{}
Implements \code{TOS1[TOS:]=TOS2}. Implements \code{TOS1[TOS:]=TOS2}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SLICE+2}{} \begin{opcodedesc}{STORE_SLICE+2}{}
Implements \code{TOS1[:TOS]=TOS2}. Implements \code{TOS1[:TOS]=TOS2}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SLICE+3}{} \begin{opcodedesc}{STORE_SLICE+3}{}
Implements \code{TOS2[TOS1:TOS]=TOS3}. Implements \code{TOS2[TOS1:TOS]=TOS3}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+0}{} \begin{opcodedesc}{DELETE_SLICE+0}{}
Implements \code{del TOS[:]}. Implements \code{del TOS[:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+1}{} \begin{opcodedesc}{DELETE_SLICE+1}{}
Implements \code{del TOS1[TOS:]}. Implements \code{del TOS1[TOS:]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+2}{} \begin{opcodedesc}{DELETE_SLICE+2}{}
Implements \code{del TOS1[:TOS]}. Implements \code{del TOS1[:TOS]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SLICE+3}{} \begin{opcodedesc}{DELETE_SLICE+3}{}
Implements \code{del TOS2[TOS1:TOS]}. Implements \code{del TOS2[TOS1:TOS]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_SUBSCR}{} \begin{opcodedesc}{STORE_SUBSCR}{}
Implements \code{TOS1[TOS]=TOS2}. Implements \code{TOS1[TOS]=TOS2}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_SUBSCR}{} \begin{opcodedesc}{DELETE_SUBSCR}{}
Implements \code{del TOS1[TOS]}. Implements \code{del TOS1[TOS]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{PRINT_EXPR}{} \begin{opcodedesc}{PRINT_EXPR}{}
Implements the expression statement for the interactive mode. TOS is Implements the expression statement for the interactive mode. TOS is
removed from the stack and printed. In non-interactive mode, an removed from the stack and printed. In non-interactive mode, an
expression statement is terminated with POP_STACK. expression statement is terminated with \code{POP_STACK}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{PRINT_ITEM}{} \begin{opcodedesc}{PRINT_ITEM}{}
Prints TOS. There is one such instruction for Prints TOS. There is one such instruction for
each item in the print statement. each item in the print statement.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{PRINT_NEWLINE}{} \begin{opcodedesc}{PRINT_NEWLINE}{}
Prints a new line on \code{sys.stdout}. This is generated as the Prints a new line on \code{sys.stdout}. This is generated as the
last operation of a print statement, unless the statement ends last operation of a print statement, unless the statement ends
with a comma. with a comma.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BREAK_LOOP}{} \begin{opcodedesc}{BREAK_LOOP}{}
Terminates a loop due to a break statement. Terminates a loop due to a break statement.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_LOCALS}{} \begin{opcodedesc}{LOAD_LOCALS}{}
Pushes a reference to the locals of the current scope on the stack. Pushes a reference to the locals of the current scope on the stack.
This is used in the code for a class definition: After the class body This is used in the code for a class definition: After the class body
is evaluated, the locals are passed to the class definition. is evaluated, the locals are passed to the class definition.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{RETURN_VALUE}{} \begin{opcodedesc}{RETURN_VALUE}{}
Returns with TOS to the caller of the function. Returns with TOS to the caller of the function.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{EXEC_STMT}{} \begin{opcodedesc}{EXEC_STMT}{}
Implements \code{exec TOS2,TOS1,TOS}. The compiler fills Implements \code{exec TOS2,TOS1,TOS}. The compiler fills
missing optional parameters with None. missing optional parameters with None.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{POP_BLOCK}{} \begin{opcodedesc}{POP_BLOCK}{}
Removes one block from the block stack. Per frame, there is a Removes one block from the block stack. Per frame, there is a
stack of blocks, denoting nested loops, try statements, and such. stack of blocks, denoting nested loops, try statements, and such.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{END_FINALLY}{} \begin{opcodedesc}{END_FINALLY}{}
Terminates a finally-block. The interpreter recalls whether the Terminates a finally-block. The interpreter recalls whether the
exception has to be re-raised, or whether the function returns, exception has to be re-raised, or whether the function returns,
and continues with the outer-next block. and continues with the outer-next block.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_CLASS}{} \begin{opcodedesc}{BUILD_CLASS}{}
Creates a new class object. TOS is the methods dictionary, TOS1 Creates a new class object. TOS is the methods dictionary, TOS1
the tuple of the names of the base classes, and TOS2 the class name. the tuple of the names of the base classes, and TOS2 the class name.
\end{funcdesc} \end{opcodedesc}
All of the following opcodes expect arguments. An argument is two All of the following opcodes expect arguments. An argument is two
bytes, with the more significant byte last. bytes, with the more significant byte last.
\begin{funcdesc}{STORE_NAME}{namei} \begin{opcodedesc}{STORE_NAME}{namei}
Implements \code{name = TOS}. \var{namei} is the index of \var{name} Implements \code{name = TOS}. \var{namei} is the index of \var{name}
in the attribute \code{co_names} of the code object. in the attribute \code{co_names} of the code object.
The compiler tries to use STORE_LOCAL or STORE_GLOBAL if possible. The compiler tries to use \code{STORE_LOCAL} or \code{STORE_GLOBAL}
\end{funcdesc} if possible.
\end{opcodedesc}
\begin{funcdesc}{DELETE_NAME}{namei} \begin{opcodedesc}{DELETE_NAME}{namei}
Implements \code{del name}, where \var{namei} is the index into Implements \code{del name}, where \var{namei} is the index into
\code{co_names} attribute of the code object. \code{co_names} attribute of the code object.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNPACK_TUPLE}{count} \begin{opcodedesc}{UNPACK_TUPLE}{count}
Unpacks TOS into \var{count} individual values, which are put onto Unpacks TOS into \var{count} individual values, which are put onto
the stack right-to-left. the stack right-to-left.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{UNPACK_LIST}{count} \begin{opcodedesc}{UNPACK_LIST}{count}
Unpacks TOS into \var{count} individual values. Unpacks TOS into \var{count} individual values.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{UNPACK_ARG}{count} %\begin{opcodedesc}{UNPACK_ARG}{count}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{STORE_ATTR}{namei} \begin{opcodedesc}{STORE_ATTR}{namei}
Implements \code{TOS.name = TOS1}, where \var{namei} is the index Implements \code{TOS.name = TOS1}, where \var{namei} is the index
of name in \code{co_names}. of name in \code{co_names}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_ATTR}{namei} \begin{opcodedesc}{DELETE_ATTR}{namei}
Implements \code{del TOS.name}, using \var{namei} as index into Implements \code{del TOS.name}, using \var{namei} as index into
\code{co_names}. \code{co_names}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_GLOBAL}{namei} \begin{opcodedesc}{STORE_GLOBAL}{namei}
Works as STORE_NAME, but stores the name as a global. Works as \code{STORE_NAME}, but stores the name as a global.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_GLOBAL}{namei} \begin{opcodedesc}{DELETE_GLOBAL}{namei}
Works as DELETE_NAME, but deletes a global name. Works as \code{DELETE_NAME}, but deletes a global name.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{UNPACK_VARARG}{argc} %\begin{opcodedesc}{UNPACK_VARARG}{argc}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{LOAD_CONST}{consti} \begin{opcodedesc}{LOAD_CONST}{consti}
Pushes \code{co_consts[consti]} onto the stack. Pushes \code{co_consts[consti]} onto the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_NAME}{namei} \begin{opcodedesc}{LOAD_NAME}{namei}
Pushes the value associated with \code{co_names[namei]} onto the stack. Pushes the value associated with \code{co_names[namei]} onto the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_TUPLE}{count} \begin{opcodedesc}{BUILD_TUPLE}{count}
Creates a tuple consuming \var{count} items from the stack, and pushes Creates a tuple consuming \var{count} items from the stack, and pushes
the resulting tuple onto the stack. the resulting tuple onto the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_LIST}{count} \begin{opcodedesc}{BUILD_LIST}{count}
Works as \code{BUILD_TUPLE}, but creates a list. Works as \code{BUILD_TUPLE}, but creates a list.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_MAP}{zero} \begin{opcodedesc}{BUILD_MAP}{zero}
Pushes an empty dictionary object onto the stack. The argument is ignored Pushes an empty dictionary object onto the stack. The argument is ignored
and set to zero by the compiler. and set to zero by the compiler.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_ATTR}{namei} \begin{opcodedesc}{LOAD_ATTR}{namei}
Replaces TOS with \code{getattr(TOS,co_names[namei]}. Replaces TOS with \code{getattr(TOS,co_names[namei]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{COMPARE_OP}{opname} \begin{opcodedesc}{COMPARE_OP}{opname}
Performs a boolean operation. The operation name can be found Performs a boolean operation. The operation name can be found
in \code{cmp_op[opname]}. in \code{cmp_op[opname]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{IMPORT_NAME}{namei} \begin{opcodedesc}{IMPORT_NAME}{namei}
Imports the module \code{co_names[namei]}. The module object is Imports the module \code{co_names[namei]}. The module object is
pushed onto the stack. The current name space is not affect: for a pushed onto the stack. The current name space is not affect: for a
proper import statement, a subsequent \code{STORE_FAST} instruction proper import statement, a subsequent \code{STORE_FAST} instruction
modifies the name space. modifies the name space.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{IMPORT_FROM}{namei} \begin{opcodedesc}{IMPORT_FROM}{namei}
Imports the attribute \code{co_names[namei]}. The module to import Imports the attribute \code{co_names[namei]}. The module to import
from is found in TOS and left there. from is found in TOS and left there.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_FORWARD}{delta} \begin{opcodedesc}{JUMP_FORWARD}{delta}
Increments byte code counter by \var{delta}. Increments byte code counter by \var{delta}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_IF_TRUE}{delta} \begin{opcodedesc}{JUMP_IF_TRUE}{delta}
If TOS is true, increment the byte code counter by \var{delta}. TOS is If TOS is true, increment the byte code counter by \var{delta}. TOS is
left on the stack. left on the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_IF_FALSE}{delta} \begin{opcodedesc}{JUMP_IF_FALSE}{delta}
If TOS is false, increment the byte code counter by \var{delta}. TOS If TOS is false, increment the byte code counter by \var{delta}. TOS
is not changed. is not changed.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{JUMP_ABSOLUTE}{target} \begin{opcodedesc}{JUMP_ABSOLUTE}{target}
Set byte code counter to \var{target}. Set byte code counter to \var{target}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{FOR_LOOP}{delta} \begin{opcodedesc}{FOR_LOOP}{delta}
Iterate over a sequence. TOS is the current index, TOS1 the sequence. Iterate over a sequence. TOS is the current index, TOS1 the sequence.
First, the next element is computed. If the sequence is exhausted, First, the next element is computed. If the sequence is exhausted,
increment byte code counter by \var{delta}. Otherwise, push the increment byte code counter by \var{delta}. Otherwise, push the
sequence, the incremented counter, and the current item onto the stack. sequence, the incremented counter, and the current item onto the stack.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{LOAD_LOCAL}{namei} %\begin{opcodedesc}{LOAD_LOCAL}{namei}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{LOAD_GLOBAL}{namei} \begin{opcodedesc}{LOAD_GLOBAL}{namei}
Loads the global named \code{co_names[namei]} onto the stack. Loads the global named \code{co_names[namei]} onto the stack.
\end{funcdesc} \end{opcodedesc}
%\begin{funcdesc}{SET_FUNC_ARGS}{argc} %\begin{opcodedesc}{SET_FUNC_ARGS}{argc}
%This opcode is obsolete. %This opcode is obsolete.
%\end{funcdesc} %\end{opcodedesc}
\begin{funcdesc}{SETUP_LOOP}{delta} \begin{opcodedesc}{SETUP_LOOP}{delta}
Pushes a block for a loop onto the block stack. The block spans Pushes a block for a loop onto the block stack. The block spans
from the current instruction with a size of \var{delta} bytes. from the current instruction with a size of \var{delta} bytes.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SETUP_EXCEPT}{delta} \begin{opcodedesc}{SETUP_EXCEPT}{delta}
Pushes a try block from a try-except clause onto the block stack. Pushes a try block from a try-except clause onto the block stack.
\var{delta} points to the first except block. \var{delta} points to the first except block.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SETUP_FINALLY}{delta} \begin{opcodedesc}{SETUP_FINALLY}{delta}
Pushes a try block from a try-except clause onto the block stack. Pushes a try block from a try-except clause onto the block stack.
\var{delta} points to the finally block. \var{delta} points to the finally block.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{LOAD_FAST}{var_num} \begin{opcodedesc}{LOAD_FAST}{var_num}
Pushes a reference to the local \code{co_varnames[var_num]} onto Pushes a reference to the local \code{co_varnames[var_num]} onto
the stack. the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{STORE_FAST}{var_num} \begin{opcodedesc}{STORE_FAST}{var_num}
Stores TOS into the local \code{co_varnames[var_num]}. Stores TOS into the local \code{co_varnames[var_num]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{DELETE_FAST}{var_num} \begin{opcodedesc}{DELETE_FAST}{var_num}
Deletes local \code{co_varnames[var_num]}. Deletes local \code{co_varnames[var_num]}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{SET_LINE_NO}{lineno} \begin{opcodedesc}{SET_LINE_NO}{lineno}
Sets the current line number to \var{lineno}. Sets the current line number to \var{lineno}.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{RAISE_VARARGS}{argc} \begin{opcodedesc}{RAISE_VARARGS}{argc}
Raises an exception. \var{argc} indicates the number of parameters Raises an exception. \var{argc} indicates the number of parameters
to the raise statement, ranging from 1 to 3. The handler will find to the raise statement, ranging from 1 to 3. The handler will find
the traceback as TOS2, the parameter as TOS1, and the exception the traceback as TOS2, the parameter as TOS1, and the exception
as TOS. as TOS.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{CALL_FUNCTION}{argc} \begin{opcodedesc}{CALL_FUNCTION}{argc}
Calls a function. The low byte of \var{argc} indicates the number of Calls a function. The low byte of \var{argc} indicates the number of
positional parameters, the high byte the number of keyword parameters. positional parameters, the high byte the number of keyword parameters.
On the stack, the opcode finds the keyword parameters first. For each On the stack, the opcode finds the keyword parameters first. For each
@ -508,17 +509,17 @@ keyword argument, the value is on top of the key. Below the keyword
parameters, the positional parameters are on the stack, with the parameters, the positional parameters are on the stack, with the
right-most parameter on top. Below the parameters, the function object right-most parameter on top. Below the parameters, the function object
to call is on the stack. to call is on the stack.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{MAKE_FUNCTION}{argc} \begin{opcodedesc}{MAKE_FUNCTION}{argc}
Pushes a new function object on the stack. TOS is the code associated Pushes a new function object on the stack. TOS is the code associated
with the function. The function object is defined to have \var{argc} with the function. The function object is defined to have \var{argc}
default parameters, which are found below TOS. default parameters, which are found below TOS.
\end{funcdesc} \end{opcodedesc}
\begin{funcdesc}{BUILD_SLICE}{argc} \begin{opcodedesc}{BUILD_SLICE}{argc}
Pushes a slice object on the stack. If \var{argc} is three, creates Pushes a slice object on the stack. If \var{argc} is three, creates
\code{TOS3[TOS2:TOS1:TOS]}. Otherwise, expects three arguments. \code{TOS3[TOS2:TOS1:TOS]}. Otherwise, expects three arguments.
\end{funcdesc} \end{opcodedesc}