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Fixed floating point mathematic speed degradation (Christian)

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This commit is contained in:
Dmitry Stogov 2009-03-18 10:18:10 +00:00
parent d3b42700a0
commit 31c0af245e
11 changed files with 93 additions and 65 deletions
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2
Zend/Makefile.am
View file

@ -17,7 +17,7 @@ libZend_la_SOURCES=\
zend_objects_API.c zend_ts_hash.c zend_stream.c \
zend_default_classes.c \
zend_iterators.c zend_interfaces.c zend_exceptions.c \
zend_strtod.c zend_closures.c
zend_strtod.c zend_closures.c zend_float.c
libZend_la_LDFLAGS =
libZend_la_LIBADD = @ZEND_EXTRA_LIBS@

4
Zend/Zend.dsp
View file

@ -155,6 +155,10 @@ SOURCE=.\zend_extensions.c
# End Source File
# Begin Source File
SOURCE=.\zend_float.c
# End Source File
# Begin Source File
SOURCE=.\zend_hash.c
# End Source File
# Begin Source File

1
Zend/zend.c
View file

@ -549,6 +549,7 @@ static void executor_globals_ctor(zend_executor_globals *executor_globals TSRMLS
EG(current_execute_data) = NULL;
EG(current_module) = NULL;
EG(exit_status) = 0;
EG(saved_fpu_cw) = NULL;
EG(active) = 0;
}
/* }}} */

5
Zend/zend_execute_API.c
View file

@ -123,6 +123,8 @@ static int clean_non_persistent_class_full(zend_class_entry **ce TSRMLS_DC) /* {
void init_executor(TSRMLS_D) /* {{{ */
{
zend_init_fpu(TSRMLS_C);
INIT_ZVAL(EG(uninitialized_zval));
/* trick to make uninitialized_zval never be modified, passed by ref, etc. */
Z_ADDREF(EG(uninitialized_zval));
@ -331,6 +333,9 @@ void shutdown_executor(TSRMLS_D) /* {{{ */
FREE_HASHTABLE(EG(in_autoload));
}
} zend_end_try();
zend_shutdown_fpu(TSRMLS_C);
EG(active) = 0;
}
/* }}} */

82
Zend/zend_float.h
View file

@ -21,10 +21,12 @@
#ifndef ZEND_FLOAT_H
#define ZEND_FLOAT_H
#define ZEND_FLOAT_DECLARE XPFPA_DECLARE
#define ZEND_FLOAT_ENSURE() XPFPA_SWITCH_DOUBLE()
#define ZEND_FLOAT_RESTORE() XPFPA_RESTORE()
#define ZEND_FLOAT_RETURN(val) XPFPA_RETURN_DOUBLE(val)
/*
Define functions for FP initialization and de-initialization.
*/
extern ZEND_API void zend_init_fpu(TSRMLS_D);
extern ZEND_API void zend_shutdown_fpu(TSRMLS_D);
extern ZEND_API void zend_ensure_fpu_mode(TSRMLS_D);
/* Copy of the contents of xpfpa.h (which is under public domain)
See http://wiki.php.net/rfc/rounding for details.
@ -45,7 +47,7 @@
For further details, please visit:
http://www.christian-seiler.de/projekte/fpmath/
Version: 20081026 */
Version: 20090317 */
/*
Implementation notes:
@ -69,11 +71,8 @@
/* MSVC detection (MSVC people usually don't use autoconf) */
#ifdef _MSC_VER
# if _MSC_VER >= 1500
/* Disable it, it slowdowns the floating operation more than
anything else, by a factor 3 (using Bench.php (mandel and
mandel2 for example)*/
/* Visual C++ 2008 or higher, supports _controlfp_s */
/*# define HAVE__CONTROLFP_S */
# define HAVE__CONTROLFP_S
# else
/* Visual C++ (up to 2005), supports _controlfp */
# define HAVE__CONTROLFP
@ -87,6 +86,19 @@
/* float.h defines _controlfp_s */
# include <float.h>
# define XPFPA_HAVE_CW 1
# define XPFPA_CW_DATATYPE \
unsigned int
# define XPFPA_STORE_CW(vptr) do { \
_controlfp_s((unsigned int *)(vptr), 0, 0); \
} while (0)
# define XPFPA_RESTORE_CW(vptr) do { \
unsigned int _xpfpa_fpu_cw; \
_controlfp_s(&_xpfpa_fpu_cw, *((unsigned int *)(vptr)), _MCW_PC); \
} while (0)
# define XPFPA_DECLARE \
unsigned int _xpfpa_fpu_oldcw, _xpfpa_fpu_cw;
@ -141,6 +153,18 @@
# define XPFPA_DECLARE \
unsigned int _xpfpa_fpu_oldcw;
# define XPFPA_HAVE_CW 1
# define XPFPA_CW_DATATYPE \
unsigned int
# define XPFPA_STORE_CW(vptr) do { \
*((unsigned int *)(vptr)) = _controlfp(0, 0); \
} while (0)
# define XPFPA_RESTORE_CW(vptr) do { \
_controlfp(*((unsigned int *)(vptr)), _MCW_PC); \
} while (0)
# define XPFPA_SWITCH_DOUBLE() do { \
_xpfpa_fpu_oldcw = _controlfp(0, 0); \
_controlfp(_PC_53, _MCW_PC); \
@ -188,6 +212,18 @@
# define XPFPA_DECLARE \
fpu_control_t _xpfpa_fpu_oldcw, _xpfpa_fpu_cw;
# define XPFPA_HAVE_CW 1
# define XPFPA_CW_DATATYPE \
fpu_control_t
# define XPFPA_STORE_CW(vptr) do { \
_FPU_GETCW((*((fpu_control_t *)(vptr)))); \
} while (0)
# define XPFPA_RESTORE_CW(vptr) do { \
_FPU_SETCW((*((fpu_control_t *)(vptr)))); \
} while (0)
# define XPFPA_SWITCH_DOUBLE() do { \
_FPU_GETCW(_xpfpa_fpu_oldcw); \
_xpfpa_fpu_cw = (_xpfpa_fpu_oldcw & ~_FPU_EXTENDED & ~_FPU_SINGLE) | _FPU_DOUBLE; \
@ -235,6 +271,18 @@
# define XPFPA_DECLARE \
fp_prec_t _xpfpa_fpu_oldprec;
# define XPFPA_HAVE_CW 1
# define XPFPA_CW_DATATYPE \
fp_prec_t
# define XPFPA_STORE_CW(vptr) do { \
*((fp_prec_t *)(vptr)) = fpgetprec(); \
} while (0)
# define XPFPA_RESTORE_CW(vptr) do { \
fpsetprec(*((fp_prec_t *)(vptr))); \
} while (0)
# define XPFPA_SWITCH_DOUBLE() do { \
_xpfpa_fpu_oldprec = fpgetprec(); \
fpsetprec(FP_PD); \
@ -298,6 +346,18 @@
# define XPFPA_DECLARE \
unsigned int _xpfpa_fpu_oldcw, _xpfpa_fpu_cw;
# define XPFPA_HAVE_CW 1
# define XPFPA_CW_DATATYPE \
unsigned int
# define XPFPA_STORE_CW(vptr) do { \
__asm__ __volatile__ ("fnstcw %0" : "=m" (*((unsigned int *)(vptr)))); \
} while (0)
# define XPFPA_RESTORE_CW(vptr) do { \
__asm__ __volatile__ ("fldcw %0" : : "m" (*((unsigned int *)(vptr)))); \
} while (0)
# define XPFPA_SWITCH_DOUBLE() do { \
__asm__ __volatile__ ("fnstcw %0" : "=m" (*&_xpfpa_fpu_oldcw)); \
_xpfpa_fpu_cw = (_xpfpa_fpu_oldcw & ~0x100) | 0x200; \
@ -345,6 +405,10 @@
generated code will behave as planned.
*/
# define XPFPA_DECLARE /* NOP */
# define XPFPA_HAVE_CW 0
# define XPFPA_CW_DATATYPE unsigned int
# define XPFPA_STORE_CW(variable) /* NOP */
# define XPFPA_RESTORE_CW(variable) /* NOP */
# define XPFPA_SWITCH_DOUBLE() /* NOP */
# define XPFPA_SWITCH_SINGLE() /* NOP */
# define XPFPA_SWITCH_DOUBLE_EXTENDED() /* NOP */

2
Zend/zend_globals.h
View file

@ -254,6 +254,8 @@ struct _zend_executor_globals {
zend_bool active;
void *saved_fpu_cw;
void *reserved[ZEND_MAX_RESERVED_RESOURCES];
};

39
Zend/zend_operators.c
View file

@ -30,7 +30,6 @@
#include "zend_multiply.h"
#include "zend_strtod.h"
#include "zend_exceptions.h"
#include "zend_float.h"
#define LONG_SIGN_MASK (1L << (8*sizeof(long)-1))
@ -742,7 +741,6 @@ ZEND_API void multi_convert_to_string_ex(int argc, ...)
ZEND_API int add_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
{
ZEND_FLOAT_DECLARE
zval op1_copy, op2_copy;
int converted = 0;
@ -755,9 +753,7 @@ ZEND_API int add_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
if ((Z_LVAL_P(op1) & LONG_SIGN_MASK) == (Z_LVAL_P(op2) & LONG_SIGN_MASK)
&& (Z_LVAL_P(op1) & LONG_SIGN_MASK) != (lval & LONG_SIGN_MASK)) {
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, (double) Z_LVAL_P(op1) + (double) Z_LVAL_P(op2));
ZEND_FLOAT_RESTORE();
} else {
ZVAL_LONG(result, lval);
}
@ -765,21 +761,15 @@ ZEND_API int add_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
}
case TYPE_PAIR(IS_LONG, IS_DOUBLE):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, ((double)Z_LVAL_P(op1)) + Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_LONG):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) + ((double)Z_LVAL_P(op2)));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_DOUBLE):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) + Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_ARRAY, IS_ARRAY): {
@ -813,7 +803,6 @@ ZEND_API int add_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
ZEND_API int sub_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
{
ZEND_FLOAT_DECLARE
zval op1_copy, op2_copy;
int converted = 0;
@ -826,9 +815,7 @@ ZEND_API int sub_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
if ((Z_LVAL_P(op1) & LONG_SIGN_MASK) != (Z_LVAL_P(op2) & LONG_SIGN_MASK)
&& (Z_LVAL_P(op1) & LONG_SIGN_MASK) != (lval & LONG_SIGN_MASK)) {
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, (double) Z_LVAL_P(op1) - (double) Z_LVAL_P(op2));
ZEND_FLOAT_RESTORE();
} else {
ZVAL_LONG(result, lval);
}
@ -836,21 +823,15 @@ ZEND_API int sub_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
}
case TYPE_PAIR(IS_LONG, IS_DOUBLE):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, ((double)Z_LVAL_P(op1)) - Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_LONG):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) - ((double)Z_LVAL_P(op2)));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_DOUBLE):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) - Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
default:
@ -869,7 +850,6 @@ ZEND_API int sub_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
ZEND_API int mul_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
{
ZEND_FLOAT_DECLARE
zval op1_copy, op2_copy;
int converted = 0;
@ -878,29 +858,21 @@ ZEND_API int mul_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
case TYPE_PAIR(IS_LONG, IS_LONG): {
long overflow;
ZEND_FLOAT_ENSURE();
ZEND_SIGNED_MULTIPLY_LONG(Z_LVAL_P(op1),Z_LVAL_P(op2), Z_LVAL_P(result),Z_DVAL_P(result),overflow);
ZEND_FLOAT_RESTORE();
Z_TYPE_P(result) = overflow ? IS_DOUBLE : IS_LONG;
return SUCCESS;
}
case TYPE_PAIR(IS_LONG, IS_DOUBLE):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, ((double)Z_LVAL_P(op1)) * Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_LONG):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) * ((double)Z_LVAL_P(op2)));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_DOUBLE):
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) * Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
default:
@ -918,7 +890,6 @@ ZEND_API int mul_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
ZEND_API int div_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
{
ZEND_FLOAT_DECLARE
zval op1_copy, op2_copy;
int converted = 0;
@ -931,17 +902,13 @@ ZEND_API int div_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
return FAILURE; /* division by zero */
} else if (Z_LVAL_P(op2) == -1 && Z_LVAL_P(op1) == LONG_MIN) {
/* Prevent overflow error/crash */
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, (double) LONG_MIN / -1);
ZEND_FLOAT_RESTORE();
return SUCCESS;
}
if (Z_LVAL_P(op1) % Z_LVAL_P(op2) == 0) { /* integer */
ZVAL_LONG(result, Z_LVAL_P(op1) / Z_LVAL_P(op2));
} else {
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, ((double) Z_LVAL_P(op1)) / Z_LVAL_P(op2));
ZEND_FLOAT_RESTORE();
}
return SUCCESS;
@ -951,9 +918,7 @@ ZEND_API int div_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
ZVAL_BOOL(result, 0);
return FAILURE; /* division by zero */
}
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) / (double)Z_LVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_LONG, IS_DOUBLE):
@ -962,9 +927,7 @@ ZEND_API int div_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
ZVAL_BOOL(result, 0);
return FAILURE; /* division by zero */
}
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, (double)Z_LVAL_P(op1) / Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
case TYPE_PAIR(IS_DOUBLE, IS_DOUBLE):
@ -973,9 +936,7 @@ ZEND_API int div_function(zval *result, zval *op1, zval *op2 TSRMLS_DC)
ZVAL_BOOL(result, 0);
return FAILURE; /* division by zero */
}
ZEND_FLOAT_ENSURE();
ZVAL_DOUBLE(result, Z_DVAL_P(op1) / Z_DVAL_P(op2));
ZEND_FLOAT_RESTORE();
return SUCCESS;
default:

6
Zend/zend_strtod.c
View file

@ -93,7 +93,6 @@
#include <zend_operators.h>
#include <zend_strtod.h>
#include <zend_float.h>
#ifdef ZTS
#include <TSRM.h>
@ -2033,7 +2032,6 @@ ret1:
ZEND_API double zend_strtod (CONST char *s00, char **se)
{
ZEND_FLOAT_DECLARE
int bb2, bb5, bbe, bd2, bd5, bbbits, bs2, c, dsign,
e, e1, esign, i, j, k, nd, nd0, nf, nz, nz0, sign;
CONST char *s, *s0, *s1;
@ -2046,8 +2044,6 @@ ZEND_API double zend_strtod (CONST char *s00, char **se)
CONST char decimal_point = '.';
ZEND_FLOAT_ENSURE();
sign = nz0 = nz = 0;
value(rv) = 0.;
@ -2578,7 +2574,7 @@ ret:
}
_THREAD_PRIVATE_MUTEX_UNLOCK(pow5mult_mutex);
ZEND_FLOAT_RETURN(result);
return result;
}
ZEND_API double zend_hex_strtod(const char *str, char **endptr)

2
configure.in
View file

@ -1452,7 +1452,7 @@ PHP_ADD_SOURCES(Zend, \
zend_list.c zend_indent.c zend_builtin_functions.c zend_sprintf.c \
zend_ini.c zend_qsort.c zend_multibyte.c zend_ts_hash.c zend_stream.c \
zend_iterators.c zend_interfaces.c zend_exceptions.c zend_strtod.c zend_gc.c \
zend_closures.c)
zend_closures.c zend_float.c)
if test -r "$abs_srcdir/Zend/zend_objects.c"; then
PHP_ADD_SOURCES(Zend, zend_objects.c zend_object_handlers.c zend_objects_API.c zend_default_classes.c)

12
ext/standard/math.c
View file

@ -24,7 +24,6 @@
#include "php.h"
#include "php_math.h"
#include "zend_multiply.h"
#include "zend_float.h"
#include <math.h>
#include <float.h>
@ -94,10 +93,8 @@ static inline double php_intpow10(int power) {
/* {{{ php_round_helper
Actually performs the rounding of a value to integer in a certain mode */
static inline double php_round_helper(double value, int mode) {
ZEND_FLOAT_DECLARE
double tmp_value;
ZEND_FLOAT_ENSURE();
if (value >= 0.0) {
tmp_value = floor(value + 0.5);
if ((mode == PHP_ROUND_HALF_DOWN && value == (-0.5 + tmp_value)) ||
@ -116,7 +113,7 @@ static inline double php_round_helper(double value, int mode) {
}
}
ZEND_FLOAT_RETURN(tmp_value);
return tmp_value;
}
/* }}} */
@ -126,13 +123,10 @@ static inline double php_round_helper(double value, int mode) {
* mode. For the specifics of the algorithm, see http://wiki.php.net/rfc/rounding
*/
PHPAPI double _php_math_round(double value, int places, int mode) {
ZEND_FLOAT_DECLARE
double f1, f2;
double tmp_value;
int precision_places;
ZEND_FLOAT_ENSURE();
precision_places = 14 - php_intlog10abs(value);
f1 = php_intpow10(abs(places));
@ -163,7 +157,7 @@ PHPAPI double _php_math_round(double value, int places, int mode) {
}
/* This value is beyond our precision, so rounding it is pointless */
if (fabs(tmp_value) >= 1e15) {
ZEND_FLOAT_RETURN(value);
return value;
}
}
@ -196,7 +190,7 @@ PHPAPI double _php_math_round(double value, int places, int mode) {
}
}
ZEND_FLOAT_RETURN(tmp_value);
return tmp_value;
}
/* }}} */

3
win32/build/config.w32
View file

@ -311,7 +311,8 @@ ADD_SOURCES("Zend", "zend_language_parser.c zend_language_scanner.c \
zend_sprintf.c zend_ini.c zend_qsort.c zend_multibyte.c zend_ts_hash.c \
zend_stream.c zend_iterators.c zend_interfaces.c zend_objects.c \
zend_object_handlers.c zend_objects_API.c \
zend_default_classes.c zend_execute.c zend_strtod.c zend_gc.c zend_closures.c");
zend_default_classes.c zend_execute.c zend_strtod.c zend_gc.c zend_closures.c \
zend_float.c");
ADD_SOURCES("main", "main.c snprintf.c spprintf.c safe_mode.c getopt.c fopen_wrappers.c \
php_scandir.c php_ini.c SAPI.c rfc1867.c php_content_types.c strlcpy.c \