Changeset 491 in xtideuniversalbios for trunk/Assembly_Library/Src/File/FileIO.asm

Timestamp:

Dec 15, 2012, 2:46:29 PM (11 years ago)

Author:

krille_n_@…

google:author:

krille_n_@hotmail.com

Message:

Changes:

• Added a new define (USE_UNDOC_INTEL) that enables optimizations possible by using undocumented instructions available on all Intel processors and truly compatible clones. AFAIK the only exceptions are the NEC V-series and the Sony CXQ70108 processors so this option should be safe for use on the AT builds.
• Building BIOSDRVS or the BIOS without MODULE_STRINGS_COMPRESSED would fail due to the recent code exclusions so I changed them a bit. Also fixed the mistaken change to Main.asm
• Changed the Tandy specific info in Configuration_FullMode.txt so it matches the info in the Wiki.
• Optimizations and fixes in general.

File:

• trunk/Assembly_Library/Src/File/FileIO.asm (modified) (9 diffs)

trunk/Assembly_Library/Src/File/FileIO.asm

@@ -3 +3 @@
 
 ;
-; XTIDE Universal BIOS and Associated Tools 
+; XTIDE Universal BIOS and Associated Tools
 ; Copyright (C) 2009-2010 by Tomi Tilli, 2011-2012 by XTIDE Universal BIOS Team.
 ;
@@ -10 +10 @@
 ; the Free Software Foundation; either version 2 of the License, or
 ; (at your option) any later version.
-; 
+;
 ; This program is distributed in the hope that it will be useful,
 ; but WITHOUT ANY WARRANTY; without even the implied warranty of
 ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-; GNU General Public License for more details.      
+; GNU General Public License for more details.
 ; Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 ;
-        
+
 
 ; Section containing code
@@ -37 +37 @@
 ALIGN JUMP_ALIGN
 FileIO_CreateWithPathInDSSIandAttributesInCX:
-    xchg    dx, si      ; Path now in DS:DX
     mov     ah, CREATE_OR_TRUNCATE_FILE
-    jmp     SHORT CreateOrOpenFile
-
+    SKIP2B  bx
+    ; Fall to FileIO_OpenWithPathInDSSIandFileAccessInAL
 
 ;--------------------------------------------------------------------
@@ -55 +54 @@
 ;       AX, BX
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 FileIO_OpenWithPathInDSSIandFileAccessInAL:
+    mov     ah, OPEN_EXISTING_FILE
     xchg    dx, si      ; Path now in DS:DX
-    mov     ah, OPEN_EXISTING_FILE
-CreateOrOpenFile:
     int     DOS_INTERRUPT_21h
     xchg    si, dx
@@ -87 +84 @@
     ret
 
-;--------------------------------------------------------------------
-; File position is updated so next read will start where
-; previous read stopped.
-;
-; FileIO_ReadCXbytesToDSSIusingHandleFromBX
-;   Parameters:
-;       BX:     File handle
-;       CX:     Number of bytes to read
-;       DS:SI:  Ptr to destination buffer
-;   Returns:
-;       AX:     Number of bytes actually read if successful (0 if at EOF before call)
-;               DOS error code if CF set
-;       CF:     Clear if successful
-;               Set if error
-;   Corrupts registers:
-;       Nothing
-;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
-FileIO_ReadCXbytesToDSSIusingHandleFromBX:
-    xchg    dx, si              ; DS:DX now points to destination buffer
-    mov     ah, READ_FROM_FILE_OR_DEVICE
-    int     DOS_INTERRUPT_21h
-    xchg    si, dx
-    ret
-
 
 ;--------------------------------------------------------------------
@@ -134 +106 @@
     ret
 
+
+;--------------------------------------------------------------------
+; File position is updated so next read will start where
+; previous read stopped.
+;
+; FileIO_ReadCXbytesToDSSIusingHandleFromBX
+;   Parameters:
+;       BX:     File handle
+;       CX:     Number of bytes to read
+;       DS:SI:  Ptr to destination buffer
+;   Returns:
+;       AX:     Number of bytes actually read if successful (0 if at EOF before call)
+;               DOS error code if CF set
+;       CF:     Clear if successful
+;               Set if error
+;   Corrupts registers:
+;       Nothing
+;--------------------------------------------------------------------
+ALIGN JUMP_ALIGN
+FileIO_ReadCXbytesToDSSIusingHandleFromBX:
+    mov     ah, READ_FROM_FILE_OR_DEVICE
+    SKIP2B  f
+    ; Fall to FileIO_WriteCXbytesFromDSSIusingHandleFromBX
+
 ;--------------------------------------------------------------------
 ; File position is updated so next write will start where
 ; previous write stopped.
 ;
-; FileIO_WriteCXbytesFromDSSIusingHandleFromBX:
+; FileIO_WriteCXbytesFromDSSIusingHandleFromBX
 ;   Parameters:
 ;       BX:     File handle
@@ -151 +147 @@
 ;       Nothing
 ;--------------------------------------------------------------------
-ALIGN JUMP_ALIGN
 FileIO_WriteCXbytesFromDSSIusingHandleFromBX:
-    xchg    dx, si              ; DS:DX now points to source buffer
     mov     ah, WRITE_TO_FILE_OR_DEVICE
+    xchg    dx, si              ; DS:DX now points to buffer
     int     DOS_INTERRUPT_21h
     xchg    si, dx
@@ -232 +227 @@
 
 ;--------------------------------------------------------------------
-; FileIO_GetFileSizeToDXAXusingHandleFromBXandResetFilePosition:
+; FileIO_GetFileSizeToDXAXusingHandleFromBXandResetFilePosition
 ;   Parameters:
 ;       BX:     File handle
@@ -287 +282 @@
 
 ;--------------------------------------------------------------------
-; FileIO_SeekFromOriginInALtoOffsetInDXAXusingHandleFromBX:
+; FileIO_SeekFromOriginInALtoOffsetInDXAXusingHandleFromBX
 ;   Parameters:
 ;       AL:     SEEK_FROM.(origin)