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Improve first bitset search in JIT.

This commit is contained in:
Zoltán Herczeg 2017-05-09 08:42:46 +00:00
parent 764e23e670
commit 660811e899
1 changed files with 34 additions and 68 deletions
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96
src/pcre2_jit_compile.c
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@ -4873,7 +4873,7 @@ for (priority = 7; priority > 2; priority--)
SLJIT_ASSERT(chars[i].count <= 2 && chars[i].count >= 1);
b1 = chars[i].chars[0];
b2 = chars[i].chars[chars[i].count - 1];
b2 = chars[i].chars[1];
if (left >= 0 && i - left <= max_fast_forward_char_pair_sse2_offset() && a1 != b1 && a1 != b2 && a2 != b1 && a2 != b2)
{
@ -5017,7 +5017,11 @@ for (i = 0; i < max; i++)
SLJIT_ASSERT(chars[i].count > 0 && chars[i].last_count <= chars[i].count);
if (chars[i].count == 1)
{
chars[i].last_count = (chars[i].last_count == 1) ? 7 : 5;
/* Simplifies algorithms later. */
chars[i].chars[1] = chars[i].chars[0];
}
else if (chars[i].count == 2)
{
SLJIT_ASSERT(chars[i].chars[0] != chars[i].chars[1]);
@ -5107,7 +5111,7 @@ if (range_right < 0)
if (offset < 0)
return FALSE;
/* Works regardless the value is 1 or 2. */
fast_forward_first_char2(common, chars[offset].chars[0], chars[offset].chars[chars[offset].count - 1], offset);
fast_forward_first_char2(common, chars[offset].chars[0], chars[offset].chars[1], offset);
return TRUE;
}
@ -5313,15 +5317,11 @@ static SLJIT_INLINE void fast_forward_start_bits(compiler_common *common)
DEFINE_COMPILER;
const sljit_u8 *start_bits = common->re->start_bitmap;
struct sljit_label *start;
#if defined SUPPORT_UNICODE && (PCRE2_CODE_UNIT_WIDTH == 8 || PCRE2_CODE_UNIT_WIDTH == 16)
struct sljit_label *utf_start;
#endif
struct sljit_jump *partial_quit;
struct sljit_jump *found = NULL;
jump_list *matches = NULL;
#if PCRE2_CODE_UNIT_WIDTH != 8
struct sljit_jump *jump;
struct sljit_jump *found = NULL;
#endif
jump_list *matches = NULL;
if (common->match_end_ptr != 0)
{
@ -5332,84 +5332,50 @@ if (common->match_end_ptr != 0)
CMOV(SLJIT_GREATER, STR_END, TMP1, 0);
}
#if defined SUPPORT_UNICODE && (PCRE2_CODE_UNIT_WIDTH == 8 || PCRE2_CODE_UNIT_WIDTH == 16)
utf_start = LABEL();
#endif
start = LABEL();
partial_quit = CMP(SLJIT_GREATER_EQUAL, STR_PTR, 0, STR_END, 0);
if (common->mode == PCRE2_JIT_COMPLETE)
add_jump(compiler, &common->failed_match, partial_quit);
start = LABEL();
OP1(MOV_UCHAR, TMP1, 0, SLJIT_MEM1(STR_PTR), 0);
OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
#ifdef SUPPORT_UNICODE
if (common->utf)
OP1(SLJIT_MOV, TMP3, 0, TMP1, 0);
#endif
if (!check_class_ranges(common, start_bits, (start_bits[31] & 0x80) != 0, TRUE, &matches))
if (!check_class_ranges(common, start_bits, (start_bits[31] & 0x80) != 0, FALSE, &matches))
{
#if PCRE2_CODE_UNIT_WIDTH != 8
if (sljit_has_cpu_feature(SLJIT_HAS_CMOV))
{
OP1(SLJIT_MOV, TMP2, 0, SLJIT_IMM, 255);
OP2(SLJIT_SUB | SLJIT_SET_GREATER, SLJIT_UNUSED, 0, TMP1, 0, TMP2, 0);
CMOV(SLJIT_GREATER, TMP1, TMP2, 0);
}
if ((start_bits[31] & 0x80) != 0)
found = CMP(SLJIT_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, 255);
else
{
jump = CMP(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 255);
OP1(SLJIT_MOV, TMP1, 0, SLJIT_IMM, 255);
JUMPHERE(jump);
}
CMPTO(SLJIT_GREATER_EQUAL, TMP1, 0, SLJIT_IMM, 255, start);
#elif defined SUPPORT_UNICODE
if (common->utf && is_char7_bitset(start_bits, FALSE))
CMPTO(SLJIT_GREATER, TMP1, 0, SLJIT_IMM, 127, start);
#endif
OP2(SLJIT_AND, TMP2, 0, TMP1, 0, SLJIT_IMM, 0x7);
OP2(SLJIT_LSHR, TMP1, 0, TMP1, 0, SLJIT_IMM, 3);
OP1(SLJIT_MOV_U8, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_sw)start_bits);
if (sljit_get_register_index(TMP3) >= 0)
{
OP2(SLJIT_SHL, TMP3, 0, SLJIT_IMM, 1, TMP2, 0);
OP2(SLJIT_AND | SLJIT_SET_Z, SLJIT_UNUSED, 0, TMP1, 0, TMP3, 0);
}
else
{
OP2(SLJIT_SHL, TMP2, 0, SLJIT_IMM, 1, TMP2, 0);
OP2(SLJIT_AND | SLJIT_SET_Z, SLJIT_UNUSED, 0, TMP1, 0, TMP2, 0);
found = JUMP(SLJIT_NOT_ZERO);
}
OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
#ifdef SUPPORT_UNICODE
if (common->utf)
OP1(SLJIT_MOV, TMP1, 0, TMP3, 0);
#endif
#ifdef SUPPORT_UNICODE
#if PCRE2_CODE_UNIT_WIDTH == 8
if (common->utf)
{
CMPTO(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0xc0, utf_start);
OP1(SLJIT_MOV_U8, TMP1, 0, SLJIT_MEM1(TMP1), (sljit_sw)PRIV(utf8_table4) - 0xc0);
OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
JUMPTO(SLJIT_ZERO, start);
}
#elif PCRE2_CODE_UNIT_WIDTH == 16
if (common->utf)
{
CMPTO(SLJIT_LESS, TMP1, 0, SLJIT_IMM, 0xd800, utf_start);
OP2(SLJIT_AND, TMP1, 0, TMP1, 0, SLJIT_IMM, 0xfc00);
OP2(SLJIT_SUB | SLJIT_SET_Z, SLJIT_UNUSED, 0, TMP1, 0, SLJIT_IMM, 0xd800);
OP_FLAGS(SLJIT_MOV, TMP1, 0, SLJIT_EQUAL);
OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
OP2(SLJIT_ADD, STR_PTR, 0, STR_PTR, 0, TMP1, 0);
}
#endif /* PCRE2_CODE_UNIT_WIDTH == [8|16] */
#endif /* SUPPORT_UNICODE */
CMPTO(SLJIT_LESS, STR_PTR, 0, STR_END, 0, start);
if (common->mode == PCRE2_JIT_COMPLETE)
add_jump(compiler, &common->failed_match, JUMP(SLJIT_JUMP));
else
set_jumps(matches, start);
#if PCRE2_CODE_UNIT_WIDTH != 8
if (found != NULL)
JUMPHERE(found);
if (matches != NULL)
set_jumps(matches, LABEL());
#endif
OP2(SLJIT_SUB, STR_PTR, 0, STR_PTR, 0, SLJIT_IMM, IN_UCHARS(1));
if (common->mode != PCRE2_JIT_COMPLETE)
JUMPHERE(partial_quit);