summaryrefslogtreecommitdiffstats
path: root/compat/zlib/contrib/gcc_gvmat64
diff options
context:
space:
mode:
Diffstat (limited to 'compat/zlib/contrib/gcc_gvmat64')
-rw-r--r--compat/zlib/contrib/gcc_gvmat64/gvmat64.S1148
1 files changed, 574 insertions, 574 deletions
diff --git a/compat/zlib/contrib/gcc_gvmat64/gvmat64.S b/compat/zlib/contrib/gcc_gvmat64/gvmat64.S
index 23309fa..dd858dd 100644
--- a/compat/zlib/contrib/gcc_gvmat64/gvmat64.S
+++ b/compat/zlib/contrib/gcc_gvmat64/gvmat64.S
@@ -1,574 +1,574 @@
-/*
-;uInt longest_match_x64(
-; deflate_state *s,
-; IPos cur_match); // current match
-
-; gvmat64.S -- Asm portion of the optimized longest_match for 32 bits x86_64
-; (AMD64 on Athlon 64, Opteron, Phenom
-; and Intel EM64T on Pentium 4 with EM64T, Pentium D, Core 2 Duo, Core I5/I7)
-; this file is translation from gvmat64.asm to GCC 4.x (for Linux, Mac XCode)
-; Copyright (C) 1995-2010 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
-;
-; File written by Gilles Vollant, by converting to assembly the longest_match
-; from Jean-loup Gailly in deflate.c of zLib and infoZip zip.
-; and by taking inspiration on asm686 with masm, optimised assembly code
-; from Brian Raiter, written 1998
-;
-; This software is provided 'as-is', without any express or implied
-; warranty. In no event will the authors be held liable for any damages
-; arising from the use of this software.
-;
-; Permission is granted to anyone to use this software for any purpose,
-; including commercial applications, and to alter it and redistribute it
-; freely, subject to the following restrictions:
-;
-; 1. The origin of this software must not be misrepresented; you must not
-; claim that you wrote the original software. If you use this software
-; in a product, an acknowledgment in the product documentation would be
-; appreciated but is not required.
-; 2. Altered source versions must be plainly marked as such, and must not be
-; misrepresented as being the original software
-; 3. This notice may not be removed or altered from any source distribution.
-;
-; http://www.zlib.net
-; http://www.winimage.com/zLibDll
-; http://www.muppetlabs.com/~breadbox/software/assembly.html
-;
-; to compile this file for zLib, I use option:
-; gcc -c -arch x86_64 gvmat64.S
-
-
-;uInt longest_match(s, cur_match)
-; deflate_state *s;
-; IPos cur_match; // current match /
-;
-; with XCode for Mac, I had strange error with some jump on intel syntax
-; this is why BEFORE_JMP and AFTER_JMP are used
- */
-
-
-#define BEFORE_JMP .att_syntax
-#define AFTER_JMP .intel_syntax noprefix
-
-#ifndef NO_UNDERLINE
-# define match_init _match_init
-# define longest_match _longest_match
-#endif
-
-.intel_syntax noprefix
-
-.globl match_init, longest_match
-.text
-longest_match:
-
-
-
-#define LocalVarsSize 96
-/*
-; register used : rax,rbx,rcx,rdx,rsi,rdi,r8,r9,r10,r11,r12
-; free register : r14,r15
-; register can be saved : rsp
-*/
-
-#define chainlenwmask (rsp + 8 - LocalVarsSize)
-#define nicematch (rsp + 16 - LocalVarsSize)
-
-#define save_rdi (rsp + 24 - LocalVarsSize)
-#define save_rsi (rsp + 32 - LocalVarsSize)
-#define save_rbx (rsp + 40 - LocalVarsSize)
-#define save_rbp (rsp + 48 - LocalVarsSize)
-#define save_r12 (rsp + 56 - LocalVarsSize)
-#define save_r13 (rsp + 64 - LocalVarsSize)
-#define save_r14 (rsp + 72 - LocalVarsSize)
-#define save_r15 (rsp + 80 - LocalVarsSize)
-
-
-/*
-; all the +4 offsets are due to the addition of pending_buf_size (in zlib
-; in the deflate_state structure since the asm code was first written
-; (if you compile with zlib 1.0.4 or older, remove the +4).
-; Note : these value are good with a 8 bytes boundary pack structure
-*/
-
-#define MAX_MATCH 258
-#define MIN_MATCH 3
-#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
-
-/*
-;;; Offsets for fields in the deflate_state structure. These numbers
-;;; are calculated from the definition of deflate_state, with the
-;;; assumption that the compiler will dword-align the fields. (Thus,
-;;; changing the definition of deflate_state could easily cause this
-;;; program to crash horribly, without so much as a warning at
-;;; compile time. Sigh.)
-
-; all the +zlib1222add offsets are due to the addition of fields
-; in zlib in the deflate_state structure since the asm code was first written
-; (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
-; (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
-; if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
-*/
-
-
-
-/* you can check the structure offset by running
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "deflate.h"
-
-void print_depl()
-{
-deflate_state ds;
-deflate_state *s=&ds;
-printf("size pointer=%u\n",(int)sizeof(void*));
-
-printf("#define dsWSize %u\n",(int)(((char*)&(s->w_size))-((char*)s)));
-printf("#define dsWMask %u\n",(int)(((char*)&(s->w_mask))-((char*)s)));
-printf("#define dsWindow %u\n",(int)(((char*)&(s->window))-((char*)s)));
-printf("#define dsPrev %u\n",(int)(((char*)&(s->prev))-((char*)s)));
-printf("#define dsMatchLen %u\n",(int)(((char*)&(s->match_length))-((char*)s)));
-printf("#define dsPrevMatch %u\n",(int)(((char*)&(s->prev_match))-((char*)s)));
-printf("#define dsStrStart %u\n",(int)(((char*)&(s->strstart))-((char*)s)));
-printf("#define dsMatchStart %u\n",(int)(((char*)&(s->match_start))-((char*)s)));
-printf("#define dsLookahead %u\n",(int)(((char*)&(s->lookahead))-((char*)s)));
-printf("#define dsPrevLen %u\n",(int)(((char*)&(s->prev_length))-((char*)s)));
-printf("#define dsMaxChainLen %u\n",(int)(((char*)&(s->max_chain_length))-((char*)s)));
-printf("#define dsGoodMatch %u\n",(int)(((char*)&(s->good_match))-((char*)s)));
-printf("#define dsNiceMatch %u\n",(int)(((char*)&(s->nice_match))-((char*)s)));
-}
-*/
-
-#define dsWSize 68
-#define dsWMask 76
-#define dsWindow 80
-#define dsPrev 96
-#define dsMatchLen 144
-#define dsPrevMatch 148
-#define dsStrStart 156
-#define dsMatchStart 160
-#define dsLookahead 164
-#define dsPrevLen 168
-#define dsMaxChainLen 172
-#define dsGoodMatch 188
-#define dsNiceMatch 192
-
-#define window_size [ rcx + dsWSize]
-#define WMask [ rcx + dsWMask]
-#define window_ad [ rcx + dsWindow]
-#define prev_ad [ rcx + dsPrev]
-#define strstart [ rcx + dsStrStart]
-#define match_start [ rcx + dsMatchStart]
-#define Lookahead [ rcx + dsLookahead] //; 0ffffffffh on infozip
-#define prev_length [ rcx + dsPrevLen]
-#define max_chain_length [ rcx + dsMaxChainLen]
-#define good_match [ rcx + dsGoodMatch]
-#define nice_match [ rcx + dsNiceMatch]
-
-/*
-; windows:
-; parameter 1 in rcx(deflate state s), param 2 in rdx (cur match)
-
-; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
-; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
-;
-; All registers must be preserved across the call, except for
-; rax, rcx, rdx, r8, r9, r10, and r11, which are scratch.
-
-;
-; gcc on macosx-linux:
-; see http://www.x86-64.org/documentation/abi-0.99.pdf
-; param 1 in rdi, param 2 in rsi
-; rbx, rsp, rbp, r12 to r15 must be preserved
-
-;;; Save registers that the compiler may be using, and adjust esp to
-;;; make room for our stack frame.
-
-
-;;; Retrieve the function arguments. r8d will hold cur_match
-;;; throughout the entire function. edx will hold the pointer to the
-;;; deflate_state structure during the function's setup (before
-;;; entering the main loop.
-
-; ms: parameter 1 in rcx (deflate_state* s), param 2 in edx -> r8 (cur match)
-; mac: param 1 in rdi, param 2 rsi
-; this clear high 32 bits of r8, which can be garbage in both r8 and rdx
-*/
- mov [save_rbx],rbx
- mov [save_rbp],rbp
-
-
- mov rcx,rdi
-
- mov r8d,esi
-
-
- mov [save_r12],r12
- mov [save_r13],r13
- mov [save_r14],r14
- mov [save_r15],r15
-
-
-//;;; uInt wmask = s->w_mask;
-//;;; unsigned chain_length = s->max_chain_length;
-//;;; if (s->prev_length >= s->good_match) {
-//;;; chain_length >>= 2;
-//;;; }
-
-
- mov edi, prev_length
- mov esi, good_match
- mov eax, WMask
- mov ebx, max_chain_length
- cmp edi, esi
- jl LastMatchGood
- shr ebx, 2
-LastMatchGood:
-
-//;;; chainlen is decremented once beforehand so that the function can
-//;;; use the sign flag instead of the zero flag for the exit test.
-//;;; It is then shifted into the high word, to make room for the wmask
-//;;; value, which it will always accompany.
-
- dec ebx
- shl ebx, 16
- or ebx, eax
-
-//;;; on zlib only
-//;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
-
-
-
- mov eax, nice_match
- mov [chainlenwmask], ebx
- mov r10d, Lookahead
- cmp r10d, eax
- cmovnl r10d, eax
- mov [nicematch],r10d
-
-
-
-//;;; register Bytef *scan = s->window + s->strstart;
- mov r10, window_ad
- mov ebp, strstart
- lea r13, [r10 + rbp]
-
-//;;; Determine how many bytes the scan ptr is off from being
-//;;; dword-aligned.
-
- mov r9,r13
- neg r13
- and r13,3
-
-//;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
-//;;; s->strstart - (IPos)MAX_DIST(s) : NIL;
-
-
- mov eax, window_size
- sub eax, MIN_LOOKAHEAD
-
-
- xor edi,edi
- sub ebp, eax
-
- mov r11d, prev_length
-
- cmovng ebp,edi
-
-//;;; int best_len = s->prev_length;
-
-
-//;;; Store the sum of s->window + best_len in esi locally, and in esi.
-
- lea rsi,[r10+r11]
-
-//;;; register ush scan_start = *(ushf*)scan;
-//;;; register ush scan_end = *(ushf*)(scan+best_len-1);
-//;;; Posf *prev = s->prev;
-
- movzx r12d,word ptr [r9]
- movzx ebx, word ptr [r9 + r11 - 1]
-
- mov rdi, prev_ad
-
-//;;; Jump into the main loop.
-
- mov edx, [chainlenwmask]
-
- cmp bx,word ptr [rsi + r8 - 1]
- jz LookupLoopIsZero
-
-
-
-LookupLoop1:
- and r8d, edx
-
- movzx r8d, word ptr [rdi + r8*2]
- cmp r8d, ebp
- jbe LeaveNow
-
-
-
- sub edx, 0x00010000
- BEFORE_JMP
- js LeaveNow
- AFTER_JMP
-
-LoopEntry1:
- cmp bx,word ptr [rsi + r8 - 1]
- BEFORE_JMP
- jz LookupLoopIsZero
- AFTER_JMP
-
-LookupLoop2:
- and r8d, edx
-
- movzx r8d, word ptr [rdi + r8*2]
- cmp r8d, ebp
- BEFORE_JMP
- jbe LeaveNow
- AFTER_JMP
- sub edx, 0x00010000
- BEFORE_JMP
- js LeaveNow
- AFTER_JMP
-
-LoopEntry2:
- cmp bx,word ptr [rsi + r8 - 1]
- BEFORE_JMP
- jz LookupLoopIsZero
- AFTER_JMP
-
-LookupLoop4:
- and r8d, edx
-
- movzx r8d, word ptr [rdi + r8*2]
- cmp r8d, ebp
- BEFORE_JMP
- jbe LeaveNow
- AFTER_JMP
- sub edx, 0x00010000
- BEFORE_JMP
- js LeaveNow
- AFTER_JMP
-
-LoopEntry4:
-
- cmp bx,word ptr [rsi + r8 - 1]
- BEFORE_JMP
- jnz LookupLoop1
- jmp LookupLoopIsZero
- AFTER_JMP
-/*
-;;; do {
-;;; match = s->window + cur_match;
-;;; if (*(ushf*)(match+best_len-1) != scan_end ||
-;;; *(ushf*)match != scan_start) continue;
-;;; [...]
-;;; } while ((cur_match = prev[cur_match & wmask]) > limit
-;;; && --chain_length != 0);
-;;;
-;;; Here is the inner loop of the function. The function will spend the
-;;; majority of its time in this loop, and majority of that time will
-;;; be spent in the first ten instructions.
-;;;
-;;; Within this loop:
-;;; ebx = scanend
-;;; r8d = curmatch
-;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
-;;; esi = windowbestlen - i.e., (window + bestlen)
-;;; edi = prev
-;;; ebp = limit
-*/
-.balign 16
-LookupLoop:
- and r8d, edx
-
- movzx r8d, word ptr [rdi + r8*2]
- cmp r8d, ebp
- BEFORE_JMP
- jbe LeaveNow
- AFTER_JMP
- sub edx, 0x00010000
- BEFORE_JMP
- js LeaveNow
- AFTER_JMP
-
-LoopEntry:
-
- cmp bx,word ptr [rsi + r8 - 1]
- BEFORE_JMP
- jnz LookupLoop1
- AFTER_JMP
-LookupLoopIsZero:
- cmp r12w, word ptr [r10 + r8]
- BEFORE_JMP
- jnz LookupLoop1
- AFTER_JMP
-
-
-//;;; Store the current value of chainlen.
- mov [chainlenwmask], edx
-/*
-;;; Point edi to the string under scrutiny, and esi to the string we
-;;; are hoping to match it up with. In actuality, esi and edi are
-;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
-;;; initialized to -(MAX_MATCH_8 - scanalign).
-*/
- lea rsi,[r8+r10]
- mov rdx, 0xfffffffffffffef8 //; -(MAX_MATCH_8)
- lea rsi, [rsi + r13 + 0x0108] //;MAX_MATCH_8]
- lea rdi, [r9 + r13 + 0x0108] //;MAX_MATCH_8]
-
- prefetcht1 [rsi+rdx]
- prefetcht1 [rdi+rdx]
-
-/*
-;;; Test the strings for equality, 8 bytes at a time. At the end,
-;;; adjust rdx so that it is offset to the exact byte that mismatched.
-;;;
-;;; We already know at this point that the first three bytes of the
-;;; strings match each other, and they can be safely passed over before
-;;; starting the compare loop. So what this code does is skip over 0-3
-;;; bytes, as much as necessary in order to dword-align the edi
-;;; pointer. (rsi will still be misaligned three times out of four.)
-;;;
-;;; It should be confessed that this loop usually does not represent
-;;; much of the total running time. Replacing it with a more
-;;; straightforward "rep cmpsb" would not drastically degrade
-;;; performance.
-*/
-
-LoopCmps:
- mov rax, [rsi + rdx]
- xor rax, [rdi + rdx]
- jnz LeaveLoopCmps
-
- mov rax, [rsi + rdx + 8]
- xor rax, [rdi + rdx + 8]
- jnz LeaveLoopCmps8
-
-
- mov rax, [rsi + rdx + 8+8]
- xor rax, [rdi + rdx + 8+8]
- jnz LeaveLoopCmps16
-
- add rdx,8+8+8
-
- BEFORE_JMP
- jnz LoopCmps
- jmp LenMaximum
- AFTER_JMP
-
-LeaveLoopCmps16: add rdx,8
-LeaveLoopCmps8: add rdx,8
-LeaveLoopCmps:
-
- test eax, 0x0000FFFF
- jnz LenLower
-
- test eax,0xffffffff
-
- jnz LenLower32
-
- add rdx,4
- shr rax,32
- or ax,ax
- BEFORE_JMP
- jnz LenLower
- AFTER_JMP
-
-LenLower32:
- shr eax,16
- add rdx,2
-
-LenLower:
- sub al, 1
- adc rdx, 0
-//;;; Calculate the length of the match. If it is longer than MAX_MATCH,
-//;;; then automatically accept it as the best possible match and leave.
-
- lea rax, [rdi + rdx]
- sub rax, r9
- cmp eax, MAX_MATCH
- BEFORE_JMP
- jge LenMaximum
- AFTER_JMP
-/*
-;;; If the length of the match is not longer than the best match we
-;;; have so far, then forget it and return to the lookup loop.
-;///////////////////////////////////
-*/
- cmp eax, r11d
- jg LongerMatch
-
- lea rsi,[r10+r11]
-
- mov rdi, prev_ad
- mov edx, [chainlenwmask]
- BEFORE_JMP
- jmp LookupLoop
- AFTER_JMP
-/*
-;;; s->match_start = cur_match;
-;;; best_len = len;
-;;; if (len >= nice_match) break;
-;;; scan_end = *(ushf*)(scan+best_len-1);
-*/
-LongerMatch:
- mov r11d, eax
- mov match_start, r8d
- cmp eax, [nicematch]
- BEFORE_JMP
- jge LeaveNow
- AFTER_JMP
-
- lea rsi,[r10+rax]
-
- movzx ebx, word ptr [r9 + rax - 1]
- mov rdi, prev_ad
- mov edx, [chainlenwmask]
- BEFORE_JMP
- jmp LookupLoop
- AFTER_JMP
-
-//;;; Accept the current string, with the maximum possible length.
-
-LenMaximum:
- mov r11d,MAX_MATCH
- mov match_start, r8d
-
-//;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
-//;;; return s->lookahead;
-
-LeaveNow:
- mov eax, Lookahead
- cmp r11d, eax
- cmovng eax, r11d
-
-
-
-//;;; Restore the stack and return from whence we came.
-
-
-// mov rsi,[save_rsi]
-// mov rdi,[save_rdi]
- mov rbx,[save_rbx]
- mov rbp,[save_rbp]
- mov r12,[save_r12]
- mov r13,[save_r13]
- mov r14,[save_r14]
- mov r15,[save_r15]
-
-
- ret 0
-//; please don't remove this string !
-//; Your can freely use gvmat64 in any free or commercial app
-//; but it is far better don't remove the string in the binary!
- // db 0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998, converted to amd 64 by Gilles Vollant 2005",0dh,0ah,0
-
-
-match_init:
- ret 0
-
-
+/*
+;uInt longest_match_x64(
+; deflate_state *s,
+; IPos cur_match); // current match
+
+; gvmat64.S -- Asm portion of the optimized longest_match for 32 bits x86_64
+; (AMD64 on Athlon 64, Opteron, Phenom
+; and Intel EM64T on Pentium 4 with EM64T, Pentium D, Core 2 Duo, Core I5/I7)
+; this file is translation from gvmat64.asm to GCC 4.x (for Linux, Mac XCode)
+; Copyright (C) 1995-2010 Jean-loup Gailly, Brian Raiter and Gilles Vollant.
+;
+; File written by Gilles Vollant, by converting to assembly the longest_match
+; from Jean-loup Gailly in deflate.c of zLib and infoZip zip.
+; and by taking inspiration on asm686 with masm, optimised assembly code
+; from Brian Raiter, written 1998
+;
+; This software is provided 'as-is', without any express or implied
+; warranty. In no event will the authors be held liable for any damages
+; arising from the use of this software.
+;
+; Permission is granted to anyone to use this software for any purpose,
+; including commercial applications, and to alter it and redistribute it
+; freely, subject to the following restrictions:
+;
+; 1. The origin of this software must not be misrepresented; you must not
+; claim that you wrote the original software. If you use this software
+; in a product, an acknowledgment in the product documentation would be
+; appreciated but is not required.
+; 2. Altered source versions must be plainly marked as such, and must not be
+; misrepresented as being the original software
+; 3. This notice may not be removed or altered from any source distribution.
+;
+; http://www.zlib.net
+; http://www.winimage.com/zLibDll
+; http://www.muppetlabs.com/~breadbox/software/assembly.html
+;
+; to compile this file for zLib, I use option:
+; gcc -c -arch x86_64 gvmat64.S
+
+
+;uInt longest_match(s, cur_match)
+; deflate_state *s;
+; IPos cur_match; // current match /
+;
+; with XCode for Mac, I had strange error with some jump on intel syntax
+; this is why BEFORE_JMP and AFTER_JMP are used
+ */
+
+
+#define BEFORE_JMP .att_syntax
+#define AFTER_JMP .intel_syntax noprefix
+
+#ifndef NO_UNDERLINE
+# define match_init _match_init
+# define longest_match _longest_match
+#endif
+
+.intel_syntax noprefix
+
+.globl match_init, longest_match
+.text
+longest_match:
+
+
+
+#define LocalVarsSize 96
+/*
+; register used : rax,rbx,rcx,rdx,rsi,rdi,r8,r9,r10,r11,r12
+; free register : r14,r15
+; register can be saved : rsp
+*/
+
+#define chainlenwmask (rsp + 8 - LocalVarsSize)
+#define nicematch (rsp + 16 - LocalVarsSize)
+
+#define save_rdi (rsp + 24 - LocalVarsSize)
+#define save_rsi (rsp + 32 - LocalVarsSize)
+#define save_rbx (rsp + 40 - LocalVarsSize)
+#define save_rbp (rsp + 48 - LocalVarsSize)
+#define save_r12 (rsp + 56 - LocalVarsSize)
+#define save_r13 (rsp + 64 - LocalVarsSize)
+#define save_r14 (rsp + 72 - LocalVarsSize)
+#define save_r15 (rsp + 80 - LocalVarsSize)
+
+
+/*
+; all the +4 offsets are due to the addition of pending_buf_size (in zlib
+; in the deflate_state structure since the asm code was first written
+; (if you compile with zlib 1.0.4 or older, remove the +4).
+; Note : these value are good with a 8 bytes boundary pack structure
+*/
+
+#define MAX_MATCH 258
+#define MIN_MATCH 3
+#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
+
+/*
+;;; Offsets for fields in the deflate_state structure. These numbers
+;;; are calculated from the definition of deflate_state, with the
+;;; assumption that the compiler will dword-align the fields. (Thus,
+;;; changing the definition of deflate_state could easily cause this
+;;; program to crash horribly, without so much as a warning at
+;;; compile time. Sigh.)
+
+; all the +zlib1222add offsets are due to the addition of fields
+; in zlib in the deflate_state structure since the asm code was first written
+; (if you compile with zlib 1.0.4 or older, use "zlib1222add equ (-4)").
+; (if you compile with zlib between 1.0.5 and 1.2.2.1, use "zlib1222add equ 0").
+; if you compile with zlib 1.2.2.2 or later , use "zlib1222add equ 8").
+*/
+
+
+
+/* you can check the structure offset by running
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "deflate.h"
+
+void print_depl()
+{
+deflate_state ds;
+deflate_state *s=&ds;
+printf("size pointer=%u\n",(int)sizeof(void*));
+
+printf("#define dsWSize %u\n",(int)(((char*)&(s->w_size))-((char*)s)));
+printf("#define dsWMask %u\n",(int)(((char*)&(s->w_mask))-((char*)s)));
+printf("#define dsWindow %u\n",(int)(((char*)&(s->window))-((char*)s)));
+printf("#define dsPrev %u\n",(int)(((char*)&(s->prev))-((char*)s)));
+printf("#define dsMatchLen %u\n",(int)(((char*)&(s->match_length))-((char*)s)));
+printf("#define dsPrevMatch %u\n",(int)(((char*)&(s->prev_match))-((char*)s)));
+printf("#define dsStrStart %u\n",(int)(((char*)&(s->strstart))-((char*)s)));
+printf("#define dsMatchStart %u\n",(int)(((char*)&(s->match_start))-((char*)s)));
+printf("#define dsLookahead %u\n",(int)(((char*)&(s->lookahead))-((char*)s)));
+printf("#define dsPrevLen %u\n",(int)(((char*)&(s->prev_length))-((char*)s)));
+printf("#define dsMaxChainLen %u\n",(int)(((char*)&(s->max_chain_length))-((char*)s)));
+printf("#define dsGoodMatch %u\n",(int)(((char*)&(s->good_match))-((char*)s)));
+printf("#define dsNiceMatch %u\n",(int)(((char*)&(s->nice_match))-((char*)s)));
+}
+*/
+
+#define dsWSize 68
+#define dsWMask 76
+#define dsWindow 80
+#define dsPrev 96
+#define dsMatchLen 144
+#define dsPrevMatch 148
+#define dsStrStart 156
+#define dsMatchStart 160
+#define dsLookahead 164
+#define dsPrevLen 168
+#define dsMaxChainLen 172
+#define dsGoodMatch 188
+#define dsNiceMatch 192
+
+#define window_size [ rcx + dsWSize]
+#define WMask [ rcx + dsWMask]
+#define window_ad [ rcx + dsWindow]
+#define prev_ad [ rcx + dsPrev]
+#define strstart [ rcx + dsStrStart]
+#define match_start [ rcx + dsMatchStart]
+#define Lookahead [ rcx + dsLookahead] //; 0ffffffffh on infozip
+#define prev_length [ rcx + dsPrevLen]
+#define max_chain_length [ rcx + dsMaxChainLen]
+#define good_match [ rcx + dsGoodMatch]
+#define nice_match [ rcx + dsNiceMatch]
+
+/*
+; windows:
+; parameter 1 in rcx(deflate state s), param 2 in rdx (cur match)
+
+; see http://weblogs.asp.net/oldnewthing/archive/2004/01/14/58579.aspx and
+; http://msdn.microsoft.com/library/en-us/kmarch/hh/kmarch/64bitAMD_8e951dd2-ee77-4728-8702-55ce4b5dd24a.xml.asp
+;
+; All registers must be preserved across the call, except for
+; rax, rcx, rdx, r8, r9, r10, and r11, which are scratch.
+
+;
+; gcc on macosx-linux:
+; see http://www.x86-64.org/documentation/abi-0.99.pdf
+; param 1 in rdi, param 2 in rsi
+; rbx, rsp, rbp, r12 to r15 must be preserved
+
+;;; Save registers that the compiler may be using, and adjust esp to
+;;; make room for our stack frame.
+
+
+;;; Retrieve the function arguments. r8d will hold cur_match
+;;; throughout the entire function. edx will hold the pointer to the
+;;; deflate_state structure during the function's setup (before
+;;; entering the main loop.
+
+; ms: parameter 1 in rcx (deflate_state* s), param 2 in edx -> r8 (cur match)
+; mac: param 1 in rdi, param 2 rsi
+; this clear high 32 bits of r8, which can be garbage in both r8 and rdx
+*/
+ mov [save_rbx],rbx
+ mov [save_rbp],rbp
+
+
+ mov rcx,rdi
+
+ mov r8d,esi
+
+
+ mov [save_r12],r12
+ mov [save_r13],r13
+ mov [save_r14],r14
+ mov [save_r15],r15
+
+
+//;;; uInt wmask = s->w_mask;
+//;;; unsigned chain_length = s->max_chain_length;
+//;;; if (s->prev_length >= s->good_match) {
+//;;; chain_length >>= 2;
+//;;; }
+
+
+ mov edi, prev_length
+ mov esi, good_match
+ mov eax, WMask
+ mov ebx, max_chain_length
+ cmp edi, esi
+ jl LastMatchGood
+ shr ebx, 2
+LastMatchGood:
+
+//;;; chainlen is decremented once beforehand so that the function can
+//;;; use the sign flag instead of the zero flag for the exit test.
+//;;; It is then shifted into the high word, to make room for the wmask
+//;;; value, which it will always accompany.
+
+ dec ebx
+ shl ebx, 16
+ or ebx, eax
+
+//;;; on zlib only
+//;;; if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+
+
+
+ mov eax, nice_match
+ mov [chainlenwmask], ebx
+ mov r10d, Lookahead
+ cmp r10d, eax
+ cmovnl r10d, eax
+ mov [nicematch],r10d
+
+
+
+//;;; register Bytef *scan = s->window + s->strstart;
+ mov r10, window_ad
+ mov ebp, strstart
+ lea r13, [r10 + rbp]
+
+//;;; Determine how many bytes the scan ptr is off from being
+//;;; dword-aligned.
+
+ mov r9,r13
+ neg r13
+ and r13,3
+
+//;;; IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
+//;;; s->strstart - (IPos)MAX_DIST(s) : NIL;
+
+
+ mov eax, window_size
+ sub eax, MIN_LOOKAHEAD
+
+
+ xor edi,edi
+ sub ebp, eax
+
+ mov r11d, prev_length
+
+ cmovng ebp,edi
+
+//;;; int best_len = s->prev_length;
+
+
+//;;; Store the sum of s->window + best_len in esi locally, and in esi.
+
+ lea rsi,[r10+r11]
+
+//;;; register ush scan_start = *(ushf*)scan;
+//;;; register ush scan_end = *(ushf*)(scan+best_len-1);
+//;;; Posf *prev = s->prev;
+
+ movzx r12d,word ptr [r9]
+ movzx ebx, word ptr [r9 + r11 - 1]
+
+ mov rdi, prev_ad
+
+//;;; Jump into the main loop.
+
+ mov edx, [chainlenwmask]
+
+ cmp bx,word ptr [rsi + r8 - 1]
+ jz LookupLoopIsZero
+
+
+
+LookupLoop1:
+ and r8d, edx
+
+ movzx r8d, word ptr [rdi + r8*2]
+ cmp r8d, ebp
+ jbe LeaveNow
+
+
+
+ sub edx, 0x00010000
+ BEFORE_JMP
+ js LeaveNow
+ AFTER_JMP
+
+LoopEntry1:
+ cmp bx,word ptr [rsi + r8 - 1]
+ BEFORE_JMP
+ jz LookupLoopIsZero
+ AFTER_JMP
+
+LookupLoop2:
+ and r8d, edx
+
+ movzx r8d, word ptr [rdi + r8*2]
+ cmp r8d, ebp
+ BEFORE_JMP
+ jbe LeaveNow
+ AFTER_JMP
+ sub edx, 0x00010000
+ BEFORE_JMP
+ js LeaveNow
+ AFTER_JMP
+
+LoopEntry2:
+ cmp bx,word ptr [rsi + r8 - 1]
+ BEFORE_JMP
+ jz LookupLoopIsZero
+ AFTER_JMP
+
+LookupLoop4:
+ and r8d, edx
+
+ movzx r8d, word ptr [rdi + r8*2]
+ cmp r8d, ebp
+ BEFORE_JMP
+ jbe LeaveNow
+ AFTER_JMP
+ sub edx, 0x00010000
+ BEFORE_JMP
+ js LeaveNow
+ AFTER_JMP
+
+LoopEntry4:
+
+ cmp bx,word ptr [rsi + r8 - 1]
+ BEFORE_JMP
+ jnz LookupLoop1
+ jmp LookupLoopIsZero
+ AFTER_JMP
+/*
+;;; do {
+;;; match = s->window + cur_match;
+;;; if (*(ushf*)(match+best_len-1) != scan_end ||
+;;; *(ushf*)match != scan_start) continue;
+;;; [...]
+;;; } while ((cur_match = prev[cur_match & wmask]) > limit
+;;; && --chain_length != 0);
+;;;
+;;; Here is the inner loop of the function. The function will spend the
+;;; majority of its time in this loop, and majority of that time will
+;;; be spent in the first ten instructions.
+;;;
+;;; Within this loop:
+;;; ebx = scanend
+;;; r8d = curmatch
+;;; edx = chainlenwmask - i.e., ((chainlen << 16) | wmask)
+;;; esi = windowbestlen - i.e., (window + bestlen)
+;;; edi = prev
+;;; ebp = limit
+*/
+.balign 16
+LookupLoop:
+ and r8d, edx
+
+ movzx r8d, word ptr [rdi + r8*2]
+ cmp r8d, ebp
+ BEFORE_JMP
+ jbe LeaveNow
+ AFTER_JMP
+ sub edx, 0x00010000
+ BEFORE_JMP
+ js LeaveNow
+ AFTER_JMP
+
+LoopEntry:
+
+ cmp bx,word ptr [rsi + r8 - 1]
+ BEFORE_JMP
+ jnz LookupLoop1
+ AFTER_JMP
+LookupLoopIsZero:
+ cmp r12w, word ptr [r10 + r8]
+ BEFORE_JMP
+ jnz LookupLoop1
+ AFTER_JMP
+
+
+//;;; Store the current value of chainlen.
+ mov [chainlenwmask], edx
+/*
+;;; Point edi to the string under scrutiny, and esi to the string we
+;;; are hoping to match it up with. In actuality, esi and edi are
+;;; both pointed (MAX_MATCH_8 - scanalign) bytes ahead, and edx is
+;;; initialized to -(MAX_MATCH_8 - scanalign).
+*/
+ lea rsi,[r8+r10]
+ mov rdx, 0xfffffffffffffef8 //; -(MAX_MATCH_8)
+ lea rsi, [rsi + r13 + 0x0108] //;MAX_MATCH_8]
+ lea rdi, [r9 + r13 + 0x0108] //;MAX_MATCH_8]
+
+ prefetcht1 [rsi+rdx]
+ prefetcht1 [rdi+rdx]
+
+/*
+;;; Test the strings for equality, 8 bytes at a time. At the end,
+;;; adjust rdx so that it is offset to the exact byte that mismatched.
+;;;
+;;; We already know at this point that the first three bytes of the
+;;; strings match each other, and they can be safely passed over before
+;;; starting the compare loop. So what this code does is skip over 0-3
+;;; bytes, as much as necessary in order to dword-align the edi
+;;; pointer. (rsi will still be misaligned three times out of four.)
+;;;
+;;; It should be confessed that this loop usually does not represent
+;;; much of the total running time. Replacing it with a more
+;;; straightforward "rep cmpsb" would not drastically degrade
+;;; performance.
+*/
+
+LoopCmps:
+ mov rax, [rsi + rdx]
+ xor rax, [rdi + rdx]
+ jnz LeaveLoopCmps
+
+ mov rax, [rsi + rdx + 8]
+ xor rax, [rdi + rdx + 8]
+ jnz LeaveLoopCmps8
+
+
+ mov rax, [rsi + rdx + 8+8]
+ xor rax, [rdi + rdx + 8+8]
+ jnz LeaveLoopCmps16
+
+ add rdx,8+8+8
+
+ BEFORE_JMP
+ jnz LoopCmps
+ jmp LenMaximum
+ AFTER_JMP
+
+LeaveLoopCmps16: add rdx,8
+LeaveLoopCmps8: add rdx,8
+LeaveLoopCmps:
+
+ test eax, 0x0000FFFF
+ jnz LenLower
+
+ test eax,0xffffffff
+
+ jnz LenLower32
+
+ add rdx,4
+ shr rax,32
+ or ax,ax
+ BEFORE_JMP
+ jnz LenLower
+ AFTER_JMP
+
+LenLower32:
+ shr eax,16
+ add rdx,2
+
+LenLower:
+ sub al, 1
+ adc rdx, 0
+//;;; Calculate the length of the match. If it is longer than MAX_MATCH,
+//;;; then automatically accept it as the best possible match and leave.
+
+ lea rax, [rdi + rdx]
+ sub rax, r9
+ cmp eax, MAX_MATCH
+ BEFORE_JMP
+ jge LenMaximum
+ AFTER_JMP
+/*
+;;; If the length of the match is not longer than the best match we
+;;; have so far, then forget it and return to the lookup loop.
+;///////////////////////////////////
+*/
+ cmp eax, r11d
+ jg LongerMatch
+
+ lea rsi,[r10+r11]
+
+ mov rdi, prev_ad
+ mov edx, [chainlenwmask]
+ BEFORE_JMP
+ jmp LookupLoop
+ AFTER_JMP
+/*
+;;; s->match_start = cur_match;
+;;; best_len = len;
+;;; if (len >= nice_match) break;
+;;; scan_end = *(ushf*)(scan+best_len-1);
+*/
+LongerMatch:
+ mov r11d, eax
+ mov match_start, r8d
+ cmp eax, [nicematch]
+ BEFORE_JMP
+ jge LeaveNow
+ AFTER_JMP
+
+ lea rsi,[r10+rax]
+
+ movzx ebx, word ptr [r9 + rax - 1]
+ mov rdi, prev_ad
+ mov edx, [chainlenwmask]
+ BEFORE_JMP
+ jmp LookupLoop
+ AFTER_JMP
+
+//;;; Accept the current string, with the maximum possible length.
+
+LenMaximum:
+ mov r11d,MAX_MATCH
+ mov match_start, r8d
+
+//;;; if ((uInt)best_len <= s->lookahead) return (uInt)best_len;
+//;;; return s->lookahead;
+
+LeaveNow:
+ mov eax, Lookahead
+ cmp r11d, eax
+ cmovng eax, r11d
+
+
+
+//;;; Restore the stack and return from whence we came.
+
+
+// mov rsi,[save_rsi]
+// mov rdi,[save_rdi]
+ mov rbx,[save_rbx]
+ mov rbp,[save_rbp]
+ mov r12,[save_r12]
+ mov r13,[save_r13]
+ mov r14,[save_r14]
+ mov r15,[save_r15]
+
+
+ ret 0
+//; please don't remove this string !
+//; Your can freely use gvmat64 in any free or commercial app
+//; but it is far better don't remove the string in the binary!
+ // db 0dh,0ah,"asm686 with masm, optimised assembly code from Brian Raiter, written 1998, converted to amd 64 by Gilles Vollant 2005",0dh,0ah,0
+
+
+match_init:
+ ret 0
+
+
generated by cgit v0.12 at 2024-11-17 22:26:17 (GMT)