php-src/Zend
2013-03-21 21:10:32 +08:00
..
RFCs Replace $Revision$ with $Id$ in keyword expansion enable files 2012-03-20 17:53:47 +01:00
tests Merge branch 'PHP-5.4' into PHP-5.5 2013-03-21 21:10:32 +08:00
acinclude.m4 SUpport newer bisons. 2012-10-18 17:53:21 +01:00
bench.php
build.mk Get rid of autoconf warnings 2011-05-16 00:14:47 +00:00
buildconf
configure.in Get rid of autoconf warnings 2011-05-16 00:14:47 +00:00
header
LICENSE
Makefile.am Invoke re2c with --no-generation-date to prevent unintentional / unnecessary changes in generated files. 2012-12-06 09:28:35 +01:00
Makefile.frag
micro_bench.php Improved ternary operator performance when returning arrays 2011-10-18 19:42:42 +00:00
OBJECTS2_HOWTO
README.ZEND_MM Fixed version numbers. 2012-03-06 18:34:10 +00:00
README.ZEND_VM
zend_alloc.c Low-level ARM optimizations 2013-02-11 14:36:58 +01:00
zend_alloc.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_API.c Merge branch 'PHP-5.4' into PHP-5.5 2013-03-21 21:10:32 +08:00
zend_API.h Merge branch 'PHP-5.4' into PHP-5.5 2013-03-21 21:10:32 +08:00
zend_build.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_builtin_functions.c Merge branch 'PHP-5.4' into PHP-5.5 2013-03-21 21:10:32 +08:00
zend_builtin_functions.h Happy New Year 2013-01-01 16:37:09 +08:00
ZEND_CHANGES
zend_closures.c Fixed bug #61025 (__invoke() visibility not honored) 2013-03-08 10:34:17 +08:00
zend_closures.h Fixed bug #61025 (__invoke() visibility not honored) 2013-03-08 10:34:17 +08:00
zend_compile.c Merge branch 'PHP-5.4' into PHP-5.5 2013-03-19 13:07:32 +04:00
zend_compile.h Fixed bug #61025 (__invoke() visibility not honored) 2013-03-08 10:34:17 +08:00
zend_config.nw.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_config.w32.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_constants.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_constants.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_default_classes.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_dtrace.c Pass zend_execute_data instead of zend_op_array 2012-12-05 00:45:23 +01:00
zend_dtrace.d
zend_dtrace.h Pass zend_execute_data instead of zend_op_array 2012-12-05 00:45:23 +01:00
zend_dynamic_array.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_dynamic_array.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_errors.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_exceptions.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_exceptions.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_execute_API.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_execute.c fix bug #49348 - issue notice on get_property_ptr_ptr when used for read 2013-02-18 20:56:02 -08:00
zend_execute.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_extensions.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_extensions.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_float.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_float.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_gc.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_gc.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_generators.c Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_generators.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_globals_macros.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_globals.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_hash.c Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_hash.h Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_highlight.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_highlight.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_indent.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_indent.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_ini_parser.y Happy New Year 2013-01-01 16:37:09 +08:00
zend_ini_scanner_defs.h Leftover: Invoke re2c with --no-generation-date to prevent unintentional / unnecessary changes in generated files. 2012-12-06 09:43:27 +01:00
zend_ini_scanner.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_ini_scanner.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_ini_scanner.l Happy New Year 2013-01-01 16:37:09 +08:00
zend_ini.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_ini.h Fixed bug #64197 (_Offsetof() macro used but not defined on ARM/Clang) 2013-02-13 12:22:50 +01:00
zend_interfaces.c Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_interfaces.h Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_istdiostream.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_iterators.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_iterators.h Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_language_parser.y Class Name Resolution As Scalar Via "class" Keyword 2013-01-19 01:00:47 +01:00
zend_language_scanner_defs.h Leftover: Invoke re2c with --no-generation-date to prevent unintentional / unnecessary changes in generated files. 2012-12-06 09:43:27 +01:00
zend_language_scanner.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_language_scanner.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_language_scanner.l Happy New Year 2013-01-01 16:37:09 +08:00
zend_list.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_list.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_llist.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_llist.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_modules.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_multibyte.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_multibyte.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_multiply.h Low-level ARM optimizations 2013-02-11 14:36:58 +01:00
zend_object_handlers.c fix bug #49348 - issue notice on get_property_ptr_ptr when used for read 2013-02-18 20:56:02 -08:00
zend_object_handlers.h fix bug #49348 - issue notice on get_property_ptr_ptr when used for read 2013-02-18 20:56:02 -08:00
zend_objects_API.c Fixed bug #63882 (zend_std_compare_objects crash on recursion) 2013-01-09 11:30:50 +04:00
zend_objects_API.h Fixed bug #63882 (zend_std_compare_objects crash on recursion) 2013-01-09 11:30:50 +04:00
zend_objects.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_objects.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_opcode.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_operators.c Fix compile failure introduced by the fix for bug #46408. 2013-01-15 10:08:26 +08:00
zend_operators.h Fix rounding of zend_dval_to_lval 2013-02-23 16:55:50 +00:00
zend_ptr_stack.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_ptr_stack.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_qsort.c Add zend_qsort_r & use it in strtr 2013-01-14 17:24:16 +01:00
zend_qsort.h Add zend_qsort_r & use it in strtr 2013-01-14 17:24:16 +01:00
zend_signal.c Expose zend_signal_handler_unblock() to DSO extensions to allow usage of HANDLE_UNBLOCK_INTERRUPTIONS macro 2011-12-02 12:14:16 +00:00
zend_signal.h Fixed bug #60627 (httpd.worker segfault on startup with php_value) 2012-01-04 08:25:06 +00:00
zend_sprintf.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_stack.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_stack.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_static_allocator.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_static_allocator.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_stream.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_stream.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_string.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_string.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_strtod.c Fixed Bug #55649 (Undefined function Bug()). (Laruence) 2011-09-13 07:07:06 +00:00
zend_strtod.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_ts_hash.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_ts_hash.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_types.h Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend_variables.c Happy New Year 2013-01-01 16:37:09 +08:00
zend_variables.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_vm_def.h Merge branch 'PHP-5.5' of git.php.net:php-src into PHP-5.5 2013-03-14 14:19:41 +04:00
zend_vm_execute.h Merge branch 'PHP-5.5' of git.php.net:php-src into PHP-5.5 2013-03-14 14:19:41 +04:00
zend_vm_execute.skl Slight performance improvement 2012-12-05 13:23:37 +04:00
zend_vm_gen.php Happy New Year 2013-01-01 16:37:09 +08:00
zend_vm_opcodes.h Happy New Year 2013-01-01 16:37:09 +08:00
zend_vm.h Happy New Year 2013-01-01 16:37:09 +08:00
zend.c Fixed bug #63980 (object members get trimmed by zero bytes) 2013-01-14 16:23:22 +08:00
Zend.dsp Add empty Generator class 2012-05-20 00:03:27 +02:00
zend.h Add support for non-scalar Iterator keys in foreach 2013-03-12 17:27:31 +01:00
zend.ico
Zend.m4 make ZEND_SIGNALS configurable, off by default 2012-02-16 01:51:45 +00:00
ZendCore.dep
ZendTS.dsp Add empty Generator class 2012-05-20 00:03:27 +02:00

ZEND_VM
=======

ZEND_VM architecture allows specializing opcode handlers according to op_type
fields and using different execution methods (call threading, switch threading
and direct threading). As a result ZE2 got more than 20% speedup on raw PHP
code execution (with specialized executor and direct threading execution
method). As in most PHP applications raw execution speed isn't the limiting
factor but system calls and database callls are, your mileage with this patch
will vary.

Most parts of the old zend_execute.c go into zend_vm_def.h. Here you can
find opcode handlers and helpers. The typical opcode handler template looks
like this:

ZEND_VM_HANDLER(<OPCODE-NUMBER>, <OPCODE>, <OP1_TYPES>, <OP2_TYPES>)
{
	<HANDLER'S CODE>
}

<OPCODE-NUMBER> is a opcode number (0, 1, ...)
<OPCODE> is an opcode name (ZEN_NOP, ZEND_ADD, :)
<OP1_TYPES> & <OP2_TYPES> are masks for allowed operand op_types. Specializer
will generate code only for defined combination of types. You can use any 
combination of the following op_types UNUSED, CONST, VAR, TMP and  CV also
you can use ANY mask to disable specialization according operand's op_type.
<HANDLER'S CODE> is a handler's code itself. For most handlers it stills the
same as in old zend_execute.c, but now it uses macros to access opcode operands
and some internal executor data.

You can see the conformity of new macros to old code in the following list:

EXECUTE_DATA
	execute_data
ZEND_VM_DISPATCH_TO_HANDLER(<OP>)
	return <OP>_helper(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)
ZEND_VM_DISPATCH_TO_HELPER(<NAME>) 
	return <NAME>(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)
ZEND_VM_DISPATCH_TO_HELPER_EX(<NAME>,<PARAM>,<VAL>) 
	return <NAME>(<VAL>, ZEND_OPCODE_HANDLER_ARGS_PASSTHRU)
ZEND_VM_CONTINUE()
	return 0
ZEND_VM_NEXT_OPCODE()
	NEXT_OPCODE()
ZEND_VM_SET_OPCODE(<TARGET>
	SET_OPCODE(<TARGET>
ZEND_VM_INC_OPCODE()
	INC_OPCOD()
ZEND_VM_RETURN_FROM_EXECUTE_LOOP()
	RETURN_FROM_EXECUTE_LOOP()
ZEND_VM_C_LABEL(<LABEL>):
	<LABEL>:
ZEND_VM_C_GOTO(<LABEL>)
	goto <LABEL>
OP<X>_TYPE
	opline->op<X>.op_type
GET_OP<X>_ZVAL_PTR(<TYPE>)
	get_zval_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
GET_OP<X>_ZVAL_PTR_PTR(<TYPE>)
	get_zval_ptr_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
GET_OP<X>_OBJ_ZVAL_PTR(<TYPE>)
	get_obj_zval_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
GET_OP<X>_OBJ_ZVAL_PTR_PTR(<TYPE>)
	get_obj_zval_ptr_ptr(&opline->op<X>, EX(Ts), &free_op<X>, <TYPE>)
IS_OP<X>_TMP_FREE()
	IS_TMP_FREE(free_op<X>)
FREE_OP<X>()
	FREE_OP(free_op<X>)
FREE_OP<X>_IF_VAR()
	FREE_VAR(free_op<X>)
FREE_OP<X>_VAR_PTR()
	FREE_VAR_PTR(free_op<X>)


Executor's helpers can be defined without parameters or with one parameter. 
This is done with the following constructs:

ZEND_VM_HELPER(<HELPER-NAME>, <OP1_TYPES>, <OP2_TYPES>)
{
	<HELPER'S CODE>
}

ZEND_VM_HELPER_EX(<HELPER-NAME>, <OP1_TYPES>, <OP2_TYPES>, <PARAM_SPEC>)
{
	<HELPER'S CODE>
}

Executor's code is generated by PHP script zend_vm_gen.php it uses zend_vm_def.h
and zend_vm_execute.skl as input and produces zend_vm_opcodes.h and 
zend_vm_execute.h. The first file is a list of opcode definitions. It is 
included from zend_compile.h. The second one is an executor code itself. It is
included from zend_execute.c.

zend_vm_gen.php can produce different kind of executors. You can select 
different opcode threading model using --with-vm-kind=CALL|SWITCH|GOTO. You can 
disable opcode specialization using --without-specializer. You can include or
exclude old executor together with specialized one using --without-old-executor.
At last you can debug executor using original zend_vm_def.h or generated file
zend_vm_execute.h. Debugging with original file requires --with-lines
option. By default ZE2 uses the following command to generate executor:

$ php zend_vm_gen.php --with-vm-kind=CALL

Zend Engine II currently includes two executors during the build process, one
is the specialized version and the other is the old one non-specialized with
function handlers. By default Zend Engine II uses the specialized one but you
can switch to the old executor at runtime by calling zend_vm_use_old_executor().