Mercurial > sdl-ios-xcode
diff src/video/riscos/SDL_riscosASM.S @ 1459:1e8582152d44
Date: Wed, 01 Mar 2006 10:14:31 +0000
From: "alan buckley"
Subject: Re: Updating SDL for RISC OS
I've attached a zip file with three diffs to get SDL to build on RISC OS.
configure.in.diff and makedeps.sh.diff have been modified so that they
can build the assembler file in video/riscos. You may want to double
check these as I don't know a lot about unix shell programming.
(I've tested them cross-compiling on cygwin).
sdlsysthread.diff is the changes required to SDL_systhread.c for RISC
OS. As you suspected with these changes in place you can delete the
RISC OS specific threading code in thread/riscos.
I've also renamed SDL_riscosASM.s to SDL_riscosASM.S, but I'm never
quite sure how to rename files in CVS, so if you could to this it would
be appreciated.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 02 Mar 2006 03:24:20 +0000 |
| parents | |
| children | 99210400e8b9 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/video/riscos/SDL_riscosASM.S Thu Mar 02 03:24:20 2006 +0000 @@ -0,0 +1,116 @@ +; +; SDL - Simple DirectMedia Layer +; Copyright (C) 1997-2004 Sam Lantinga +; +; This library is free software; you can redistribute it and/or +; modify it under the terms of the GNU Library General Public +; License as published by the Free Software Foundation; either +; version 2 of the License, or (at your option) any later version. +; +; This library 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 +; Library General Public License for more details. +; +; You should have received a copy of the GNU Library General Public +; License along with this library; if not, write to the Free +; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +; +; Sam Lantinga +; slouken@libsdl.org +; +; Assembler routines for RISC OS display +; + + AREA |C$$CODE| + + EXPORT |RISCOS_Put32| + +; Display 32bpp to 32bpp, 1:1 +; +; Code provided by Adrain Lees +; +; entry a1 -> destination +; a2 = dest width in pixels +; a3 = dest line length in bytes +; a4 = dest height in scanlines +; arg5 -> source +; arg6 = byte offset from end of source line to start of next + +Arg5 * 10*4 +Arg6 * Arg5+4 + +RISCOS_Put32 ROUT + STMFD sp!,{a2,v1-v6,sl,fp,lr} + LDR ip,[sp,#Arg5] + MOV lr,a1 + B ucp64lp + +00 ;tail strip of 1-15 pixels + + LDR v1,[ip],#4 +01 SUBS a2,a2,#1 + STR v1,[lr],#4 + LDRHI v1,[ip],#4 + BHI %01 + B %02 + +ucp64end ADDS a2,a2,#16 + BNE %00 + +02 SUBS a4,a4,#1 ;height-- + LDRHI v1,[sp,#Arg6] + LDRHI a2,[sp] ;reload width + BLS %03 + + ;move to start of next scanline + + ADD lr,a1,a3 + ADD a1,a1,a3 + ADD ip,ip,v1 + +ucp64lp SUBS a2,a2,#16 + BLO ucp64end + + PLD [ip,#64] + + LDR v1,[ip],#4 + LDR v2,[ip],#4 + LDR v3,[ip],#4 + LDR v4,[ip],#4 + LDR v5,[ip],#4 + LDR v6,[ip],#4 + LDR sl,[ip],#4 + LDR fp,[ip],#4 + STR v1,[lr],#4 + STR v2,[lr],#4 + STR v3,[lr],#4 + STR v4,[lr],#4 + STR v5,[lr],#4 + STR v6,[lr],#4 + STR sl,[lr],#4 + STR fp,[lr],#4 + + PLD [ip,#64] + + LDR v1,[ip],#4 + LDR v2,[ip],#4 + LDR v3,[ip],#4 + LDR v4,[ip],#4 + LDR v5,[ip],#4 + LDR v6,[ip],#4 + LDR sl,[ip],#4 + LDR fp,[ip],#4 + STR v1,[lr],#4 + STR v2,[lr],#4 + STR v3,[lr],#4 + STR v4,[lr],#4 + STR v5,[lr],#4 + STR v6,[lr],#4 + STR sl,[lr],#4 + STR fp,[lr],#4 + + B ucp64lp + +03 LDMFD sp!,{a2,v1-v6,sl,fp,pc} +