FW: [Zlib-devel] new assembly code for modified structure in zLib1.2.2.1

Mon Jan 3 18:34:15 EST 2005

 in zlib 1.2.2.2, you've successfully updated gvmat32.asm and inffas32.asm
in contrib\masmx86, but I found old gvmat32.obj and inffas32.obj in
contrib\vstudio\vc7
I suggest you update the .obj in  contrib\vstudio\vc7 with obj from
http://gvollant.free.fr/newasmzl1221.zip

-----Original Message-----
From: Gilles Vollant [mailto:info at winimage.com] 
Sent: Monday, November 01, 2004 3:08 PM
To: zlib-devel at zlib.net
Subject: [Zlib-devel] new assembly code for modified structure in
zLib1.2.2.1

structure inflate_state and deflate_state were modified in zLib 1.2.2.1

I've updated files from contrib\masmx86
you can get
http://gvollant.free.fr/newasmzl1221.zip

before releasing next zlib, we must probably modify (or at least check)
other assembly code

*** zlib-1.2.2\gvmat32.asm  Wed May 24 11:07:11 2000
--- zlib-1.2.2.1\gvmat32.asm    Mon Nov 01 14:59:20 2004
***************
*** 47,67 ****

! ;  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
!     dep_chain_length    equ     70h+4
!     dep_window          equ     2ch+4
!     dep_strstart        equ     60h+4
!     dep_prev_length     equ     6ch+4
!     dep_nice_match      equ     84h+4
!     dep_w_size          equ     20h+4
!     dep_prev            equ     34h+4
!     dep_w_mask          equ     28h+4
!     dep_good_match      equ     80h+4
!     dep_match_start     equ     64h+4
!     dep_lookahead       equ     68h+4

  _TEXT                   segment
--- 47,71 ----

! ;  all the +addstr offsets are due to the addition of pending_buf_size in
zlib 1.04 ! ;  and adding gzhead and gzindex in zlib 1.2.2.1
  ;  in the deflate_state structure since the asm code was first written ! ;
(if you compile with zlib 1.0.4 or older, set addstr to 0).
! ;  (if you compiler with zlib between 1.04 and 1.2.1, set addstr to 4)
  ;  Note : these value are good with a 8 bytes boundary pack structure !
!     addstr              equ     4+8
!     dep_chain_length    equ     70h+addstr
!     dep_window          equ     2ch+addstr
!     dep_strstart        equ     60h+addstr
!     dep_prev_length     equ     6ch+addstr
!     dep_nice_match      equ     84h+addstr
!     dep_w_size          equ     20h+addstr
!     dep_prev            equ     34h+addstr
!     dep_w_mask          equ     28h+addstr
!     dep_good_match      equ     80h+addstr
!     dep_match_start     equ     64h+addstr
!     dep_lookahead       equ     68h+addstr

  _TEXT                   segment
***************
*** 597,615 ****
  ;;; program to crash horribly, without so much as a warning at
  ;;; compile time. Sigh.)

! dsWSize       equ 36
! dsWMask       equ 44
! dsWindow  equ 48
! dsPrev        equ 56
! dsMatchLen    equ 88
! dsPrevMatch   equ 92
! dsStrStart    equ 100
! dsMatchStart  equ 104
! dsLookahead   equ 108
! dsPrevLen equ 112
! dsMaxChainLen equ 116
! dsGoodMatch   equ 132
! dsNiceMatch   equ 136

  ;;; match.asm -- Pentium-Pro-optimized version of longest_match()
--- 601,619 ----
  ;;; program to crash horribly, without so much as a warning at
  ;;; compile time. Sigh.)

! dsWSize       equ 36+addstr-4
! dsWMask       equ 44+addstr-4
! dsWindow  equ 48+addstr-4
! dsPrev        equ 56+addstr-4
! dsMatchLen    equ 88+addstr-4
! dsPrevMatch   equ 92+addstr-4
! dsStrStart    equ 100+addstr-4
! dsMatchStart  equ 104+addstr-4
! dsLookahead   equ 108+addstr-4
! dsPrevLen equ 112+addstr-4
! dsMaxChainLen equ 116+addstr-4
! dsGoodMatch   equ 132+addstr-4
! dsNiceMatch   equ 136+addstr-4

  ;;; match.asm -- Pentium-Pro-optimized version of longest_match()
*** zlib-1.2.2\inffas32.asm Mon Aug 25 18:54:37 2003
--- zlib-1.2.2.1\inffas32.asm   Mon Nov 01 14:48:27 2004
***************
*** 84,100 ****
  dd    4294967295

  mode_state     equ    0   ;/* state->mode */
! wsize_state    equ    32  ;/* state->wsize */
! write_state    equ    (36+4)  ;/* state->write */
! window_state   equ    (40+4)  ;/* state->window */
! hold_state     equ    (44+4)  ;/* state->hold */
! bits_state     equ    (48+4)  ;/* state->bits */
! lencode_state  equ    (64+4)  ;/* state->lencode */
! distcode_state     equ    (68+4)  ;/* state->distcode */
! lenbits_state  equ    (72+4)  ;/* state->lenbits */
! distbits_state     equ    (76+4)  ;/* state->distbits */

  ;;SECTION .text
--- 84,103 ----
  dd    4294967295

+ ; head was added in zlib 1.2.2.1, so we add addstr ; set addstr to 0 
+ with zlib 1.2.1 of below
+ addstr           equ    4

  mode_state     equ    0   ;/* state->mode */
! wsize_state    equ    32+addstr   ;/* state->wsize */
! write_state    equ    (36+4+addstr)   ;/* state->write */
! window_state   equ    (40+4+addstr)   ;/* state->window */
! hold_state     equ    (44+4+addstr)   ;/* state->hold */
! bits_state     equ    (48+4+addstr)   ;/* state->bits */
! lencode_state  equ    (64+4+addstr)   ;/* state->lencode */
! distcode_state     equ    (68+4+addstr)   ;/* state->distcode */
! lenbits_state  equ    (72+4+addstr)   ;/* state->lenbits */
! distbits_state     equ    (76+4+addstr)   ;/* state->distbits */

  ;;SECTION .text

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