602 lines
19 KiB
OpenEdge ABL
602 lines
19 KiB
OpenEdge ABL
|
#if _MSC_FULL_VER >= 13008827 && defined(_M_IX86)
|
||
|
|
#pragma warning(disable:4731) // EBP modified with inline asm
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if CHAIN >= 2
|
||
|
|
INLINE void find_match (prs *p)
|
||
|
|
{
|
||
|
|
const uchar *p1;
|
||
|
|
xint k, n, m;
|
||
|
|
#if CHAIN >= 3
|
||
|
|
xint chain = v.chain;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
p->x.z_next[0] = (z_index_t) (k = n = v.orig.pos);
|
||
|
|
do
|
||
|
|
{
|
||
|
|
m = p->x.z_next[k];
|
||
|
|
{
|
||
|
|
uint16 c = *(__unaligned uint16 *)((p1 = v.orig.ptr + v.match.len - 1) + n);
|
||
|
|
#if CHAIN >= 3
|
||
|
|
do
|
||
|
|
{
|
||
|
|
if (--chain < 0)
|
||
|
|
return;
|
||
|
|
#endif
|
||
|
|
k = p->x.z_next[m]; if (*(__unaligned uint16 *) (p1 + m) == c) goto same_m;
|
||
|
|
m = p->x.z_next[k]; if (*(__unaligned uint16 *) (p1 + k) == c) goto same_k;
|
||
|
|
k = p->x.z_next[m]; if (*(__unaligned uint16 *) (p1 + m) == c) goto same_m;
|
||
|
|
m = p->x.z_next[k]; if (*(__unaligned uint16 *) (p1 + k) == c) goto same_k;
|
||
|
|
k = p->x.z_next[m]; if (*(__unaligned uint16 *) (p1 + m) == c) goto same_m;
|
||
|
|
m = p->x.z_next[k]; if (*(__unaligned uint16 *) (p1 + k) == c) goto same_k;
|
||
|
|
k = p->x.z_next[m]; if (*(__unaligned uint16 *) (p1 + m) == c) goto same_m;
|
||
|
|
m = p->x.z_next[k]; if (*(__unaligned uint16 *) (p1 + k) == c) goto same_k;
|
||
|
|
|
||
|
|
#if CHAIN < 3
|
||
|
|
if (*(__unaligned uint16 *) (p1 + m) == c) goto same_m;
|
||
|
|
return;
|
||
|
|
#else
|
||
|
|
}
|
||
|
|
while (1);
|
||
|
|
#endif
|
||
|
|
same_m:
|
||
|
|
k = m;
|
||
|
|
same_k:
|
||
|
|
if (k == n)
|
||
|
|
return;
|
||
|
|
#if MAX_OFFSET < BUFF_SIZE_LOG
|
||
|
|
if (n - k >= (1 << MAX_OFFSET))
|
||
|
|
return;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
{
|
||
|
|
const uchar *p2;
|
||
|
|
p1 = v.orig.ptr;
|
||
|
|
p2 = p1 + k;
|
||
|
|
p1 += n;
|
||
|
|
|
||
|
|
if ((m = *(__unaligned uint32 *)p2 ^ *(__unaligned uint32 *)p1) != 0)
|
||
|
|
{
|
||
|
|
#if MIN_MATCH <= 3
|
||
|
|
if ((m & 0xffffff) == 0 && v.match.len <= 2 && p1 + 3 <= v.orig.end)
|
||
|
|
{
|
||
|
|
v.match.len = 3;
|
||
|
|
v.match.pos = k;
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
goto cont;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (p1 <= v.orig.end_16)
|
||
|
|
{
|
||
|
|
goto entry4;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
#define X(i) if (p1[i] != p2[i]) {p1 += i; goto chk;}
|
||
|
|
X(0); X(1); X(2); X(3);
|
||
|
|
entry4:
|
||
|
|
X(4); X(5); X(6); X(7); X(8);
|
||
|
|
X(9); X(10); X(11); X(12); X(13); X(14); X(15);
|
||
|
|
#undef X
|
||
|
|
p1 += 16; p2 += 16;
|
||
|
|
}
|
||
|
|
while (p1 <= v.orig.end_16);
|
||
|
|
}
|
||
|
|
while (p1 != v.orig.end)
|
||
|
|
{
|
||
|
|
if (*p1 != *p2)
|
||
|
|
goto chk;
|
||
|
|
++p1;
|
||
|
|
++p2;
|
||
|
|
}
|
||
|
|
#define SET_LENGTH() \
|
||
|
|
n = -n; \
|
||
|
|
n += (xint) (p1 - v.orig.ptr); \
|
||
|
|
if (n > v.match.len) \
|
||
|
|
{ \
|
||
|
|
v.match.len = n; \
|
||
|
|
v.match.pos = k; \
|
||
|
|
}
|
||
|
|
SET_LENGTH ();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
chk:
|
||
|
|
SET_LENGTH ();
|
||
|
|
cont:
|
||
|
|
n = v.orig.pos;
|
||
|
|
}
|
||
|
|
while (CHAIN >= 3);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void encode_pass1 (prs *p)
|
||
|
|
{
|
||
|
|
uchar *ptr = v.temp.ptr;
|
||
|
|
do
|
||
|
|
{
|
||
|
|
if (p->x.z_next[v.orig.pos] == 0)
|
||
|
|
goto literal;
|
||
|
|
v.match.len = MIN_MATCH-1;
|
||
|
|
find_match (p);
|
||
|
|
if (v.match.len <= MIN_MATCH-1)
|
||
|
|
{
|
||
|
|
literal:
|
||
|
|
write_lit (p, ptr, v.orig.ptr[v.orig.pos]);
|
||
|
|
v.orig.pos += 1;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ptr = write_ptr (p, ptr, v.orig.pos - v.match.pos, v.match.len);
|
||
|
|
v.orig.pos += v.match.len;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (v.orig.pos < v.orig.stop);
|
||
|
|
v.temp.ptr = ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CHAIN >= 2 */
|
||
|
|
|
||
|
|
|
||
|
|
#if CHAIN < 2
|
||
|
|
#if CODING != CODING_DIRECT2 || !defined (i386)
|
||
|
|
|
||
|
|
static void encode_pass1 (prs *p)
|
||
|
|
{
|
||
|
|
const uchar *b, *b1, *stop;
|
||
|
|
uchar *ptr;
|
||
|
|
#if CHAIN > 0
|
||
|
|
xint pos = v.orig.pos;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
b = v.orig.ptr;
|
||
|
|
v.orig.ptr_stop = stop = b + v.orig.stop;
|
||
|
|
b += v.orig.pos;
|
||
|
|
ptr = v.temp.ptr;
|
||
|
|
|
||
|
|
if (b != v.orig.ptr)
|
||
|
|
goto literal_entry;
|
||
|
|
|
||
|
|
for (;;)
|
||
|
|
{
|
||
|
|
do
|
||
|
|
{
|
||
|
|
#if MAX_OFFSET < BUFF_SIZE_LOG
|
||
|
|
next:
|
||
|
|
#endif
|
||
|
|
write_lit (p, ptr, *b);
|
||
|
|
++b;
|
||
|
|
#if CHAIN > 0
|
||
|
|
++pos;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
literal_entry:
|
||
|
|
if (b >= stop)
|
||
|
|
goto ret;
|
||
|
|
|
||
|
|
{
|
||
|
|
uxint h;
|
||
|
|
#if CHAIN <= 0
|
||
|
|
h = Q_HASH_SUM (b);
|
||
|
|
b1 = p->x.q_last[h];
|
||
|
|
p->x.q_last[h] = b;
|
||
|
|
#else
|
||
|
|
assert (pos == b - v.orig.ptr);
|
||
|
|
h = Z_HASH_SUM (b);
|
||
|
|
b1 = v.orig.ptr + p->x.z_next[h];
|
||
|
|
p->x.z_next[h] = (z_index_t) pos;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
#if MAX_OFFSET < BUFF_SIZE_LOG
|
||
|
|
if (b1 <= b - (1 << MAX_OFFSET))
|
||
|
|
goto next;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
while (b1 == 0 || b1[0] != b[0] || b1[1] != b[1] || b1[2] != b[2]);
|
||
|
|
|
||
|
|
assert (v.orig.ptr + v.orig.size - b > 7);
|
||
|
|
|
||
|
|
{
|
||
|
|
const uchar *b0 = b;
|
||
|
|
|
||
|
|
if (b <= v.orig.end_16)
|
||
|
|
goto match_entry_3;
|
||
|
|
goto match_careful;
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
#define X(i) if (b1[i] != b[i]) {b += i; b1 += i; goto eval_len;}
|
||
|
|
X(0); X(1); X(2);
|
||
|
|
match_entry_3:
|
||
|
|
X(3); X(4); X(5); X(6); X(7);
|
||
|
|
X(8); X(9); X(10); X(11);
|
||
|
|
X(12); X(13); X(14); X(15);
|
||
|
|
#undef X
|
||
|
|
b += 16; b1 += 16;
|
||
|
|
}
|
||
|
|
while (b <= v.orig.end_16);
|
||
|
|
|
||
|
|
match_careful:
|
||
|
|
while (b != v.orig.end && *b1 == *b)
|
||
|
|
{
|
||
|
|
++b;
|
||
|
|
++b1;
|
||
|
|
}
|
||
|
|
|
||
|
|
eval_len:
|
||
|
|
#if BUFF_SIZE_LOG > 16
|
||
|
|
#error
|
||
|
|
#endif
|
||
|
|
ptr = write_ptr (p, ptr, (xint)(b - b1), (xint)(b - b0));
|
||
|
|
b1 = b0;
|
||
|
|
}
|
||
|
|
|
||
|
|
++b1;
|
||
|
|
#if CHAIN > 0
|
||
|
|
++pos;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
if (b > v.orig.end_3)
|
||
|
|
{
|
||
|
|
while (b1 < v.orig.end_3)
|
||
|
|
{
|
||
|
|
#if CHAIN <= 0
|
||
|
|
p->x.q_last[Q_HASH_SUM (b1)] = b1;
|
||
|
|
#else
|
||
|
|
assert (pos == b1 - v.orig.ptr);
|
||
|
|
p->x.z_next[Z_HASH_SUM (b1)] = (z_index_t) pos;
|
||
|
|
++pos;
|
||
|
|
#endif
|
||
|
|
++b1;
|
||
|
|
}
|
||
|
|
goto literal_entry;
|
||
|
|
}
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
#if CHAIN <= 0
|
||
|
|
p->x.q_last[Q_HASH_SUM (b1)] = b1;
|
||
|
|
#else
|
||
|
|
assert (pos == b1 - v.orig.ptr);
|
||
|
|
p->x.z_next[Z_HASH_SUM (b1)] = (z_index_t) pos;
|
||
|
|
++pos;
|
||
|
|
#endif
|
||
|
|
++b1;
|
||
|
|
}
|
||
|
|
while (b1 != b);
|
||
|
|
|
||
|
|
goto literal_entry;
|
||
|
|
}
|
||
|
|
|
||
|
|
ret:
|
||
|
|
v.orig.pos = (xint)(b - v.orig.ptr);
|
||
|
|
v.temp.ptr = ptr;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* CODING != CODING_DIRECT2 */
|
||
|
|
|
||
|
|
static void encode_pass1 (prs *PrsPtr)
|
||
|
|
{
|
||
|
|
|
||
|
|
#define PRS edx
|
||
|
|
#define TAG ebp
|
||
|
|
#define TAGW bp
|
||
|
|
|
||
|
|
// access to prs structure fields
|
||
|
|
#define V [PRS - SIZE prs] prs.c
|
||
|
|
|
||
|
|
// TAG = tag_mask; adjusts TAG (tag_mask), V.temp.tag_ptr, and ebx (output pointer)
|
||
|
|
#define WRITE_TAG_MASK() \
|
||
|
|
__asm mov ecx, V.temp.tag_ptr \
|
||
|
|
__asm mov V.temp.tag_ptr, ebx \
|
||
|
|
__asm add ebx, 4 \
|
||
|
|
__asm mov [ecx], TAG \
|
||
|
|
__asm mov TAG, 1
|
||
|
|
|
||
|
|
#if CHAIN <= 0
|
||
|
|
|
||
|
|
// access to respective hash table entry
|
||
|
|
#define Q_HTABLE(idx) dword ptr [PRS + idx*4] prs.x.q_last
|
||
|
|
|
||
|
|
// evaluate hash sum of [esi] on eax; spoils eax, ecx, TAG
|
||
|
|
#define Q_HASH_SUM_ASM() \
|
||
|
|
__asm movzx eax, byte ptr [esi] \
|
||
|
|
__asm movzx ecx, byte ptr [esi+1] \
|
||
|
|
__asm movzx edi, byte ptr [esi+2] \
|
||
|
|
__asm lea ecx, [ecx + eax * (1 << (Q_HASH_SH1 - Q_HASH_SH2))] \
|
||
|
|
__asm lea eax, [edi + ecx * (1 << Q_HASH_SH2)]
|
||
|
|
|
||
|
|
#else
|
||
|
|
|
||
|
|
// access to respective hash table entry
|
||
|
|
#define Z_HTABLE(idx) word ptr [PRS + idx*2] prs.x.z_next
|
||
|
|
|
||
|
|
// evaluate hash sum of [esi] on eax; spoils eax, ecx, edi
|
||
|
|
#define Z_HASH_SUM_ASM() \
|
||
|
|
__asm movzx eax, byte ptr [esi] \
|
||
|
|
__asm movzx ecx, byte ptr [esi+1] \
|
||
|
|
__asm movzx edi, byte ptr [esi+2] \
|
||
|
|
__asm movzx eax, word ptr z_hash_map[eax*2] \
|
||
|
|
__asm movzx ecx, word ptr z_hash_map[ecx*2][512] \
|
||
|
|
__asm movzx edi, word ptr z_hash_map[edi*2][1024] \
|
||
|
|
__asm xor eax, ecx \
|
||
|
|
__asm xor eax, edi
|
||
|
|
#endif /* CHAIN <= 0 */
|
||
|
|
|
||
|
|
__asm
|
||
|
|
{
|
||
|
|
push ebp // save ebp
|
||
|
|
|
||
|
|
mov PRS, PrsPtr // PRS = PrsPtr (globally)
|
||
|
|
|
||
|
|
// esi = b
|
||
|
|
// edi = b1
|
||
|
|
// ebx = V.prs.temp.ptr
|
||
|
|
// TAG = V.temp.tag_mask
|
||
|
|
|
||
|
|
mov esi, V.orig.ptr // obtain b, b1, temp.ptr, and temp.mask
|
||
|
|
mov eax, V.orig.stop
|
||
|
|
add eax, esi
|
||
|
|
mov V.orig.ptr_stop, eax // and set orig.ptr_stop by orig.stop
|
||
|
|
add esi, V.orig.pos
|
||
|
|
mov ebx, V.temp.ptr
|
||
|
|
mov TAG, V.temp.tag_mask
|
||
|
|
|
||
|
|
cmp esi, V.orig.ptr // if beginning of buffer
|
||
|
|
jne write_literal_entry // then write literal immediately
|
||
|
|
|
||
|
|
write_literal:
|
||
|
|
mov al, [esi] // read the literal
|
||
|
|
inc ebx // shift dst ptr in advance
|
||
|
|
inc esi // shift src ptr to next character
|
||
|
|
mov [ebx-1], al // emit literal
|
||
|
|
|
||
|
|
add TAG, TAG // write tag bit 0
|
||
|
|
jc write_literal_tag_new // save tag word if it is full
|
||
|
|
write_literal_tag_done:
|
||
|
|
|
||
|
|
|
||
|
|
write_literal_entry:
|
||
|
|
cmp esi, V.orig.ptr_stop // processed everything?
|
||
|
|
jae pass1_stop // yes, stop
|
||
|
|
|
||
|
|
#if CHAIN <= 0
|
||
|
|
Q_HASH_SUM_ASM () // evaluate hash sum
|
||
|
|
#if MAX_OFFSET < BUFF_SIZE_LOG
|
||
|
|
lea ecx, [esi - (1 << MAX_OFFSET) + 1] // min. allowed left bound
|
||
|
|
#endif
|
||
|
|
mov edi, Q_HTABLE (eax) // edi = candidate ptr
|
||
|
|
mov Q_HTABLE (eax), esi // save current ptr
|
||
|
|
#else
|
||
|
|
Z_HASH_SUM_ASM () // evaluate hash sum
|
||
|
|
mov ecx,V.orig.ptr
|
||
|
|
movzx di, Z_HTABLE (eax) // edi = offset to candidate ptr
|
||
|
|
sub esi, ecx // esi = offset to current ptr
|
||
|
|
add edi, ecx // edi = candidate ptr
|
||
|
|
mov Z_HTABLE (eax), si // store current ptr offset
|
||
|
|
add esi, ecx // restore current ptr
|
||
|
|
|
||
|
|
#if MAX_OFFSET < BUFF_SIZE_LOG
|
||
|
|
lea ecx, [esi - (1 << MAX_OFFSET) + 1] // min. allowed left bound
|
||
|
|
#endif
|
||
|
|
#endif /* CHAIN <= 0 */
|
||
|
|
|
||
|
|
#if MAX_OFFSET < BUFF_SIZE_LOG
|
||
|
|
cmp edi, ecx // canidate is in window?
|
||
|
|
js write_literal // no, then emit literal
|
||
|
|
#endif
|
||
|
|
|
||
|
|
test edi, edi // is it NULL?
|
||
|
|
jz write_literal // emit literal if so
|
||
|
|
|
||
|
|
mov eax, [esi] // get first 4 src bytes
|
||
|
|
sub eax, [edi] // diff them with first 4 candidate bytes
|
||
|
|
je length_4 // if no diff then match is at least 4 bytes
|
||
|
|
|
||
|
|
test eax, 0xffffff // is there any difference in first 3 bytes?
|
||
|
|
jne write_literal // if yes emit literal
|
||
|
|
|
||
|
|
mov ecx, 3 // save match ptr of length ECX
|
||
|
|
sub edi, esi // edi = -offset
|
||
|
|
write_small_ptr:
|
||
|
|
lea eax, [esi+ecx] // eax = end of src match
|
||
|
|
not edi // edi = offset-1
|
||
|
|
add ebx, 2 // adjust output ptr in advance
|
||
|
|
shl edi, DIRECT2_LEN_LOG // make room for length
|
||
|
|
inc esi // esi = next substring (current already inserted)
|
||
|
|
lea edi, [edi + ecx - MIN_MATCH] // combine offset and shoft length
|
||
|
|
stc // set carry bit
|
||
|
|
mov [ebx-2], di // save packed pointer
|
||
|
|
|
||
|
|
adc TAG, TAG // write tag bit 1
|
||
|
|
jc write_pointer_tag_new // write tag word when it is full
|
||
|
|
write_pointer_tag_done:
|
||
|
|
|
||
|
|
cmp eax, V.orig.end_3 // is it too close to end of buffer?
|
||
|
|
ja insert_tail // if yes process is specially avoiding read overrun
|
||
|
|
|
||
|
|
#if CHAIN <= 0
|
||
|
|
push TAG // save tag_mask
|
||
|
|
mov TAG, eax // eax = end-of-match
|
||
|
|
insert_all:
|
||
|
|
Q_HASH_SUM_ASM () // evaluate hash sum
|
||
|
|
mov Q_HTABLE (eax), esi // save current ptr
|
||
|
|
inc esi // shift to next position
|
||
|
|
cmp esi, TAG // inserted all substrings in the match?
|
||
|
|
jne insert_all // continue until finished
|
||
|
|
pop TAG // restore tag_mask value
|
||
|
|
jmp write_literal_entry // process next substring
|
||
|
|
#else
|
||
|
|
push TAG // save tag_mask
|
||
|
|
push eax // save end-of-match
|
||
|
|
mov TAG, esi // TAG = current ptr
|
||
|
|
sub TAG, V.orig.ptr // TAG = current ptr offset
|
||
|
|
insert_all:
|
||
|
|
Z_HASH_SUM_ASM () // evaluate hash sum
|
||
|
|
mov Z_HTABLE (eax), TAGW // save current offset
|
||
|
|
inc esi // shift to next position
|
||
|
|
inc TAG // increase offset
|
||
|
|
cmp esi, [esp] // inserted all substrings in the match?
|
||
|
|
jne insert_all // continue until finished
|
||
|
|
pop eax // remove end-of-match ptr from the stack
|
||
|
|
pop TAG // restore tag_mask
|
||
|
|
jmp write_literal_entry // process next substring
|
||
|
|
#endif /* CHAIN <= 0 */
|
||
|
|
|
||
|
|
length_4:
|
||
|
|
#define KNOWN_LENGTH 4 // we know that first 4 bytes match
|
||
|
|
|
||
|
|
#if DIRECT2_MAX_LEN + MIN_MATCH >= 8
|
||
|
|
mov eax, [esi+4] // fetch next 4 bytes
|
||
|
|
sub eax, [edi+4] // get the diff between src and candidate
|
||
|
|
jz length_8 // do long compare if 8+ bytes match
|
||
|
|
|
||
|
|
bsf ecx, eax // ecx = # of first non-zero bit
|
||
|
|
sub edi, esi // edi = -offset
|
||
|
|
shr ecx, 3 // ecx = # of first non-zero byte
|
||
|
|
not edi // edi = offset-1
|
||
|
|
add ecx, 4 // plus previous 4 matching bytes = match length
|
||
|
|
add ebx, 2 // adjust output ptr in advance
|
||
|
|
lea eax, [esi+ecx] // eax = end of src match
|
||
|
|
shl edi, DIRECT2_LEN_LOG // make room for length
|
||
|
|
inc esi // esi = next substring (current already inserted)
|
||
|
|
lea edi,[edi+ecx-MIN_MATCH] // combine offset and shoft length
|
||
|
|
stc // set carry bit
|
||
|
|
mov [ebx-2], di // save packed pointer
|
||
|
|
|
||
|
|
adc TAG, TAG // write tag bit 1
|
||
|
|
jnc write_pointer_tag_done // write tag word when it is full
|
||
|
|
|
||
|
|
WRITE_TAG_MASK ()
|
||
|
|
jmp write_pointer_tag_done
|
||
|
|
|
||
|
|
length_8:
|
||
|
|
#undef KNOWN_LENGTH
|
||
|
|
#define KNOWN_LENGTH 8 // we know that first 8 bytes match
|
||
|
|
#endif /* DIRECT2_MAX_LEN + MIN_MATCH >= 8 */
|
||
|
|
|
||
|
|
mov eax, esi // eax = beginning of the string
|
||
|
|
mov ecx, V.orig.end // ecx = end of buffer
|
||
|
|
add esi, KNOWN_LENGTH // shift to first untested src byte
|
||
|
|
add edi, KNOWN_LENGTH // shift to first untested candidate
|
||
|
|
sub ecx, esi // ecx = max compare length
|
||
|
|
|
||
|
|
rep cmpsb // compare src and candidate
|
||
|
|
je match_complete // if eq then match till end of buffer
|
||
|
|
match_complete_done:
|
||
|
|
|
||
|
|
lea ecx, [esi-1] // ecx = end of match
|
||
|
|
sub edi, esi // edi = -offset
|
||
|
|
sub ecx, eax // ecx = match length
|
||
|
|
mov esi, eax // esi = src ptr
|
||
|
|
cmp ecx, DIRECT2_MAX_LEN+MIN_MATCH // small length?
|
||
|
|
jb write_small_ptr // write ptr if so
|
||
|
|
|
||
|
|
not edi // edi = offset-1
|
||
|
|
lea eax, [esi+ecx] // eax = end of match
|
||
|
|
shl edi, DIRECT2_LEN_LOG // make room for length
|
||
|
|
sub ecx, DIRECT2_MAX_LEN+MIN_MATCH // decrease the length
|
||
|
|
add edi, DIRECT2_MAX_LEN // mark length as long
|
||
|
|
push eax // save end of match
|
||
|
|
mov [ebx], di // write packed pointer
|
||
|
|
|
||
|
|
mov al, cl // al = (ecx <= 15 ? cl : 15)
|
||
|
|
cmp ecx, 15
|
||
|
|
jbe match_less_15
|
||
|
|
mov al, 15
|
||
|
|
match_less_15:
|
||
|
|
|
||
|
|
mov edi, V.stat.ptr // edi = quad_ptr
|
||
|
|
add ebx, 2 // wrote 2 bytes, move output ptr
|
||
|
|
|
||
|
|
test edi, edi // if quad_ptr != NULL write upper 4 bits
|
||
|
|
jne match_have_ptr
|
||
|
|
mov V.stat.ptr, ebx // make new tag_ptr
|
||
|
|
mov [ebx], al // write lower 4 bits
|
||
|
|
inc ebx // wrote 1 byte, move output ptr
|
||
|
|
jmp match_done_ptr // continue execution
|
||
|
|
match_have_ptr:
|
||
|
|
shl al, 4 // will write into upper 4 bits
|
||
|
|
mov dword ptr V.stat.ptr, 0 // no more space in this quad_bit[0]
|
||
|
|
or [edi], al // write upper 4 bits
|
||
|
|
match_done_ptr:
|
||
|
|
sub ecx, 15 // adjusted length < 15?
|
||
|
|
jae match_long_long_length // if not continue encoding
|
||
|
|
match_finish_2:
|
||
|
|
inc esi // shift to next output position
|
||
|
|
pop eax // restore eax = end-of-match
|
||
|
|
stc // set carry flag
|
||
|
|
adc TAG, TAG // write tag bit 1
|
||
|
|
jnc write_pointer_tag_done // continue execution if do not need to flush
|
||
|
|
write_pointer_tag_new: // write tag word and return to pointers
|
||
|
|
WRITE_TAG_MASK ()
|
||
|
|
jmp write_pointer_tag_done
|
||
|
|
|
||
|
|
match_long_long_length:
|
||
|
|
mov [ebx], cl // write the length as a byte
|
||
|
|
inc ebx // move output ptr
|
||
|
|
cmp ecx, 255 // adjusted length fits in byte?
|
||
|
|
jb match_finish_2 // if so ptr is written
|
||
|
|
|
||
|
|
add ecx, DIRECT2_MAX_LEN+15 // restore full length - MIN_MATCH
|
||
|
|
mov byte ptr [ebx-1], 255 // mark byte length as "to be continued"
|
||
|
|
mov [ebx], cx // write full length
|
||
|
|
add ebx, 2 // move output ptr
|
||
|
|
jmp match_finish_2
|
||
|
|
|
||
|
|
write_literal_tag_new: // write tag word and return to literals
|
||
|
|
WRITE_TAG_MASK ()
|
||
|
|
jmp write_literal_tag_done
|
||
|
|
|
||
|
|
match_complete: // cmpsb compared till end of buffer
|
||
|
|
inc esi // increase esi
|
||
|
|
inc edi // increase edi
|
||
|
|
jmp match_complete_done // resume execution
|
||
|
|
|
||
|
|
insert_tail:
|
||
|
|
push eax // save end-of-match
|
||
|
|
jmp insert_tail_1
|
||
|
|
|
||
|
|
insert_tail_next:
|
||
|
|
#if CHAIN <= 0
|
||
|
|
Q_HASH_SUM_ASM () // evaluate hash sum
|
||
|
|
mov Q_HTABLE (eax), esi // insert current src pointer
|
||
|
|
#else
|
||
|
|
Z_HASH_SUM_ASM () // evaluate hash sum
|
||
|
|
mov ecx, esi
|
||
|
|
sub ecx, V.orig.ptr // ecx = current ptr offset
|
||
|
|
mov Z_HTABLE (eax), cx // save offset in hash table
|
||
|
|
#endif /* CHAIN <= 0 */
|
||
|
|
inc esi // and move it to next substring
|
||
|
|
insert_tail_1: // end of match exceeds end_3 -- be careful
|
||
|
|
cmp esi, V.orig.end_3 // inserted up to end_3?
|
||
|
|
jb insert_tail_next // if not continue
|
||
|
|
pop esi // esi = end of match
|
||
|
|
jmp write_literal_entry
|
||
|
|
|
||
|
|
pass1_stop:
|
||
|
|
mov V.temp.ptr, ebx // save register variables
|
||
|
|
mov V.temp.tag_mask, TAG
|
||
|
|
sub esi, V.orig.ptr
|
||
|
|
mov V.orig.pos, esi
|
||
|
|
|
||
|
|
pop ebp // restore ebp
|
||
|
|
} /* __asm */
|
||
|
|
}
|
||
|
|
|
||
|
|
#undef V
|
||
|
|
#undef PRS
|
||
|
|
#undef TAG
|
||
|
|
#undef TAGW
|
||
|
|
#undef Q_HTABLE
|
||
|
|
#undef Q_HASH_SUM_ASM
|
||
|
|
#undef Z_HTABLE
|
||
|
|
#undef Z_HASH_SUM_ASM
|
||
|
|
#undef WRITE_SMALL_PTR
|
||
|
|
#undef KNOWN_LENGTH
|
||
|
|
#endif /* CODING != CODING_DIRECT2 */
|
||
|
|
#endif /* CHAIN < 2 */
|
||
|
|
|
||
|
|
|
||
|
|
#undef CHAIN
|
||
|
|
#undef find_match
|
||
|
|
#undef encode_pass1
|