mirror of
https://github.com/php/php-src.git
synced 2024-11-23 18:04:36 +08:00
01b3fc03c3
1. Update: http://www.php.net/license/3_01.txt to https, as there is anyway server header "Location:" to https. 2. Update few license 3.0 to 3.01 as 3.0 states "php 5.1.1, 4.1.1, and earlier". 3. In some license comments is "at through the world-wide-web" while most is without "at", so deleted. 4. fixed indentation in some files before |
295 lines
7.7 KiB
C
295 lines
7.7 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend OPcache JIT |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) The PHP Group |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 3.01 of the PHP license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| https://www.php.net/license/3_01.txt |
|
|
| If you did not receive a copy of the PHP license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@php.net so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: Dmitry Stogov <dmitry@php.net> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
#ifndef _ZEND_BITSET_H_
|
|
#define _ZEND_BITSET_H_
|
|
|
|
typedef zend_ulong *zend_bitset;
|
|
|
|
#define ZEND_BITSET_ELM_SIZE sizeof(zend_ulong)
|
|
|
|
#if SIZEOF_ZEND_LONG == 4
|
|
# define ZEND_BITSET_ELM_NUM(n) ((n) >> 5)
|
|
# define ZEND_BITSET_BIT_NUM(n) ((zend_ulong)(n) & Z_UL(0x1f))
|
|
#elif SIZEOF_ZEND_LONG == 8
|
|
# define ZEND_BITSET_ELM_NUM(n) ((n) >> 6)
|
|
# define ZEND_BITSET_BIT_NUM(n) ((zend_ulong)(n) & Z_UL(0x3f))
|
|
#else
|
|
# define ZEND_BITSET_ELM_NUM(n) ((n) / (sizeof(zend_long) * 8))
|
|
# define ZEND_BITSET_BIT_NUM(n) ((n) % (sizeof(zend_long) * 8))
|
|
#endif
|
|
|
|
#define ZEND_BITSET_ALLOCA(n, use_heap) \
|
|
(zend_bitset)do_alloca((n) * ZEND_BITSET_ELM_SIZE, use_heap)
|
|
|
|
/* Number of trailing zero bits (0x01 -> 0; 0x40 -> 6; 0x00 -> LEN) */
|
|
static zend_always_inline int zend_ulong_ntz(zend_ulong num)
|
|
{
|
|
#if (defined(__GNUC__) || __has_builtin(__builtin_ctzl)) \
|
|
&& SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CTZL)
|
|
return __builtin_ctzl(num);
|
|
#elif (defined(__GNUC__) || __has_builtin(__builtin_ctzll)) && defined(PHP_HAVE_BUILTIN_CTZLL)
|
|
return __builtin_ctzll(num);
|
|
#elif defined(_WIN32)
|
|
unsigned long index;
|
|
|
|
#if defined(_WIN64)
|
|
if (!BitScanForward64(&index, num)) {
|
|
#else
|
|
if (!BitScanForward(&index, num)) {
|
|
#endif
|
|
/* undefined behavior */
|
|
return SIZEOF_ZEND_LONG * 8;
|
|
}
|
|
|
|
return (int) index;
|
|
#else
|
|
int n;
|
|
|
|
if (num == Z_UL(0)) return SIZEOF_ZEND_LONG * 8;
|
|
|
|
n = 1;
|
|
#if SIZEOF_ZEND_LONG == 8
|
|
if ((num & 0xffffffff) == 0) {n += 32; num = num >> Z_UL(32);}
|
|
#endif
|
|
if ((num & 0x0000ffff) == 0) {n += 16; num = num >> 16;}
|
|
if ((num & 0x000000ff) == 0) {n += 8; num = num >> 8;}
|
|
if ((num & 0x0000000f) == 0) {n += 4; num = num >> 4;}
|
|
if ((num & 0x00000003) == 0) {n += 2; num = num >> 2;}
|
|
return n - (num & 1);
|
|
#endif
|
|
}
|
|
|
|
/* Number of leading zero bits (Undefined for zero) */
|
|
static zend_always_inline int zend_ulong_nlz(zend_ulong num)
|
|
{
|
|
#if (defined(__GNUC__) || __has_builtin(__builtin_clzl)) \
|
|
&& SIZEOF_ZEND_LONG == SIZEOF_LONG && defined(PHP_HAVE_BUILTIN_CLZL)
|
|
return __builtin_clzl(num);
|
|
#elif (defined(__GNUC__) || __has_builtin(__builtin_clzll)) && defined(PHP_HAVE_BUILTIN_CLZLL)
|
|
return __builtin_clzll(num);
|
|
#elif defined(_WIN32)
|
|
unsigned long index;
|
|
|
|
#if defined(_WIN64)
|
|
if (!BitScanReverse64(&index, num)) {
|
|
#else
|
|
if (!BitScanReverse(&index, num)) {
|
|
#endif
|
|
/* undefined behavior */
|
|
return SIZEOF_ZEND_LONG * 8;
|
|
}
|
|
|
|
return (int) (SIZEOF_ZEND_LONG * 8 - 1)- index;
|
|
#else
|
|
zend_ulong x;
|
|
int n;
|
|
|
|
#if SIZEOF_ZEND_LONG == 8
|
|
n = 64;
|
|
x = num >> 32; if (x != 0) {n -= 32; num = x;}
|
|
#else
|
|
n = 32;
|
|
#endif
|
|
x = num >> 16; if (x != 0) {n -= 16; num = x;}
|
|
x = num >> 8; if (x != 0) {n -= 8; num = x;}
|
|
x = num >> 4; if (x != 0) {n -= 4; num = x;}
|
|
x = num >> 2; if (x != 0) {n -= 2; num = x;}
|
|
x = num >> 1; if (x != 0) return n - 2;
|
|
return n - num;
|
|
#endif
|
|
}
|
|
|
|
/* Returns the number of zend_ulong words needed to store a bitset that is N
|
|
bits long. */
|
|
static inline uint32_t zend_bitset_len(uint32_t n)
|
|
{
|
|
return (n + ((sizeof(zend_long) * 8) - 1)) / (sizeof(zend_long) * 8);
|
|
}
|
|
|
|
static inline bool zend_bitset_in(zend_bitset set, uint32_t n)
|
|
{
|
|
return ZEND_BIT_TEST(set, n);
|
|
}
|
|
|
|
static inline void zend_bitset_incl(zend_bitset set, uint32_t n)
|
|
{
|
|
set[ZEND_BITSET_ELM_NUM(n)] |= Z_UL(1) << ZEND_BITSET_BIT_NUM(n);
|
|
}
|
|
|
|
static inline void zend_bitset_excl(zend_bitset set, uint32_t n)
|
|
{
|
|
set[ZEND_BITSET_ELM_NUM(n)] &= ~(Z_UL(1) << ZEND_BITSET_BIT_NUM(n));
|
|
}
|
|
|
|
static inline void zend_bitset_clear(zend_bitset set, uint32_t len)
|
|
{
|
|
memset(set, 0, len * ZEND_BITSET_ELM_SIZE);
|
|
}
|
|
|
|
static inline bool zend_bitset_empty(zend_bitset set, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
for (i = 0; i < len; i++) {
|
|
if (set[i]) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static inline void zend_bitset_fill(zend_bitset set, uint32_t len)
|
|
{
|
|
memset(set, 0xff, len * ZEND_BITSET_ELM_SIZE);
|
|
}
|
|
|
|
static inline bool zend_bitset_equal(zend_bitset set1, zend_bitset set2, uint32_t len)
|
|
{
|
|
return memcmp(set1, set2, len * ZEND_BITSET_ELM_SIZE) == 0;
|
|
}
|
|
|
|
static inline void zend_bitset_copy(zend_bitset set1, zend_bitset set2, uint32_t len)
|
|
{
|
|
memcpy(set1, set2, len * ZEND_BITSET_ELM_SIZE);
|
|
}
|
|
|
|
static inline void zend_bitset_intersection(zend_bitset set1, zend_bitset set2, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
set1[i] &= set2[i];
|
|
}
|
|
}
|
|
|
|
static inline void zend_bitset_union(zend_bitset set1, zend_bitset set2, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
set1[i] |= set2[i];
|
|
}
|
|
}
|
|
|
|
static inline void zend_bitset_difference(zend_bitset set1, zend_bitset set2, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
set1[i] = set1[i] & ~set2[i];
|
|
}
|
|
}
|
|
|
|
static inline void zend_bitset_union_with_intersection(zend_bitset set1, zend_bitset set2, zend_bitset set3, zend_bitset set4, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
set1[i] = set2[i] | (set3[i] & set4[i]);
|
|
}
|
|
}
|
|
|
|
static inline void zend_bitset_union_with_difference(zend_bitset set1, zend_bitset set2, zend_bitset set3, zend_bitset set4, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
set1[i] = set2[i] | (set3[i] & ~set4[i]);
|
|
}
|
|
}
|
|
|
|
static inline bool zend_bitset_subset(zend_bitset set1, zend_bitset set2, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
if (set1[i] & ~set2[i]) {
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static inline int zend_bitset_first(zend_bitset set, uint32_t len)
|
|
{
|
|
uint32_t i;
|
|
|
|
for (i = 0; i < len; i++) {
|
|
if (set[i]) {
|
|
return ZEND_BITSET_ELM_SIZE * 8 * i + zend_ulong_ntz(set[i]);
|
|
}
|
|
}
|
|
return -1; /* empty set */
|
|
}
|
|
|
|
static inline int zend_bitset_last(zend_bitset set, uint32_t len)
|
|
{
|
|
uint32_t i = len;
|
|
|
|
while (i > 0) {
|
|
i--;
|
|
if (set[i]) {
|
|
int j = ZEND_BITSET_ELM_SIZE * 8 * i - 1;
|
|
zend_ulong x = set[i];
|
|
while (x != Z_UL(0)) {
|
|
x = x >> Z_UL(1);
|
|
j++;
|
|
}
|
|
return j;
|
|
}
|
|
}
|
|
return -1; /* empty set */
|
|
}
|
|
|
|
#define ZEND_BITSET_FOREACH(set, len, bit) do { \
|
|
zend_bitset _set = (set); \
|
|
uint32_t _i, _len = (len); \
|
|
for (_i = 0; _i < _len; _i++) { \
|
|
zend_ulong _x = _set[_i]; \
|
|
if (_x) { \
|
|
(bit) = ZEND_BITSET_ELM_SIZE * 8 * _i; \
|
|
for (; _x != 0; _x >>= Z_UL(1), (bit)++) { \
|
|
if (!(_x & Z_UL(1))) continue;
|
|
|
|
#define ZEND_BITSET_REVERSE_FOREACH(set, len, bit) do { \
|
|
zend_bitset _set = (set); \
|
|
uint32_t _i = (len); \
|
|
zend_ulong _test = Z_UL(1) << (ZEND_BITSET_ELM_SIZE * 8 - 1); \
|
|
while (_i-- > 0) { \
|
|
zend_ulong _x = _set[_i]; \
|
|
if (_x) { \
|
|
(bit) = ZEND_BITSET_ELM_SIZE * 8 * (_i + 1) - 1; \
|
|
for (; _x != 0; _x <<= Z_UL(1), (bit)--) { \
|
|
if (!(_x & _test)) continue; \
|
|
|
|
#define ZEND_BITSET_FOREACH_END() \
|
|
} \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
static inline int zend_bitset_pop_first(zend_bitset set, uint32_t len) {
|
|
int i = zend_bitset_first(set, len);
|
|
if (i >= 0) {
|
|
zend_bitset_excl(set, i);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
#endif /* _ZEND_BITSET_H_ */
|