mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-27 06:34:11 +00:00
6b3b94bafc
snd_dma.c, {nq,qw}/source/cl_parse.c:
change the type of snd_worldmodel from * to ** and init snd_worldmodel
with the ADDRESS of cl.worldmodel so its changes get seen by snd_dma
snd_mixa.S:
picize
281 lines
5.7 KiB
ArmAsm
281 lines
5.7 KiB
ArmAsm
/*
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snd_mixa.S
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x86 assembly-language sound code
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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$Id$
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include "QF/asm_i386.h"
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// #include "quakeasm.h"
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#ifdef USE_INTEL_ASM
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.text
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.extern C(snd_scaletable)
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.extern C(paintbuffer)
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.extern C(snd_linear_count)
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.extern C(snd_p)
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.extern C(snd_vol)
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.extern C(snd_out)
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//----------------------------------------------------------------------
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// 8-bit sound-mixing code
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//----------------------------------------------------------------------
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#define ch 4+16
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#define sc 8+16
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#define count 12+16
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.globl C(SND_PaintChannelFrom8)
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#ifdef PIC
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.type C(SND_PaintChannelFrom8),@function
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#endif
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C(SND_PaintChannelFrom8):
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pushl %esi // preserve register variables
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pushl %edi
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pushl %ebx
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pushl %ebp
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// int data;
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// short *lscale, *rscale;
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// unsigned char *sfx;
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// int i;
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movl ch(%esp),%ebx
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movl sc(%esp),%esi
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// if (ch->leftvol > 255)
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// ch->leftvol = 255;
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// if (ch->rightvol > 255)
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// ch->rightvol = 255;
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movl ch_leftvol(%ebx),%eax
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movl ch_rightvol(%ebx),%edx
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cmpl $255,%eax
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jna LLeftSet
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movl $255,%eax
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LLeftSet:
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cmpl $255,%edx
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jna LRightSet
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movl $255,%edx
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LRightSet:
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// lscale = snd_scaletable[ch->leftvol >> 3];
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// rscale = snd_scaletable[ch->rightvol >> 3];
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// sfx = (signed char *)sc->data + ch->pos;
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// ch->pos += count;
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andl $0xF8,%eax
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addl $(sfxc_data),%esi
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andl $0xF8,%edx
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movl ch_pos(%ebx),%edi
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movl count(%esp),%ecx
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addl %edi,%esi
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shll $7,%eax
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addl %ecx,%edi
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addl %ecx,%esi
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shll $7,%edx
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movl %edi,ch_pos(%ebx)
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#ifdef PIC
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call .Lpic1
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.Lpic1: popl %ebx
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addl $_GLOBAL_OFFSET_TABLE_+[.-.Lpic1],%ebx
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leal C(snd_scaletable)@GOTOFF(%ebx,%eax),%eax
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leal C(snd_scaletable)@GOTOFF(%ebx,%edx),%edx
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leal C(paintbuffer)@GOTOFF(%ebx),%ebx
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#else
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leal C(snd_scaletable)(%eax),%eax
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leal C(snd_scaletable)(%edx),%edx
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leal C(paintbuffer),%ebx
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#endif
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pushl %ebx // save paintbuffer offset
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testl $1,%ecx
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leal 0(%ebx,%ecx,psp_size),%ecx
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movl $0,%ebx
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movb -1(%esi),%bl
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jz LMix8Loop
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movl (%eax,%ebx,4),%edi
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movl (%edx,%ebx,4),%ebp
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addl psp_left-psp_size(%ecx),%edi
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addl psp_right-psp_size(%ecx),%ebp
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movl %edi,psp_left-psp_size(%ecx)
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movl %ebp,psp_right-psp_size(%ecx)
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movb -2(%esi),%bl
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subl $psp_size,%ecx
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decl %esi
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cmpl (%esp),%ecx
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jz LDone
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// for (i=0 ; i<count ; i++)
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// {
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LMix8Loop:
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// data = sfx[i];
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// paintbuffer[i].left += lscale[data];
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// paintbuffer[i].right += rscale[data];
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movl (%eax,%ebx,4),%edi
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movl (%edx,%ebx,4),%ebp
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addl psp_left-psp_size(%ecx),%edi
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addl psp_right-psp_size(%ecx),%ebp
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movb -2(%esi),%bl
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movl %edi,psp_left-psp_size(%ecx)
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movl %ebp,psp_right-psp_size(%ecx)
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movl (%eax,%ebx,4),%edi
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movl (%edx,%ebx,4),%ebp
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movb -3(%esi),%bl
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addl psp_left-psp_size*2(%ecx),%edi
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addl psp_right-psp_size*2(%ecx),%ebp
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movl %edi,psp_left-psp_size*2(%ecx)
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movl %ebp,psp_right-psp_size*2(%ecx)
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// }
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subl $2*psp_size,%ecx
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subl $2,%esi
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cmpl (%esp),%ecx
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jnz LMix8Loop
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LDone:
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addl $4,%esp // remove paintbuffer offset
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popl %ebp
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popl %ebx
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popl %edi
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popl %esi
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ret
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#ifdef PIC
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.Lfe1:
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.size C(SND_PaintChannelFrom8),.Lfe1-C(SND_PaintChannelFrom8)
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#endif
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//----------------------------------------------------------------------
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// Transfer of stereo buffer to 16-bit DMA buffer code
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//----------------------------------------------------------------------
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.globl C(Snd_WriteLinearBlastStereo16)
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#ifdef PIC
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.type C(Snd_WriteLinearBlastStereo16),@function
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#endif
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C(Snd_WriteLinearBlastStereo16):
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pushl %esi // preserve register variables
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pushl %edi
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pushl %ebx
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#ifdef PIC
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call .Lpic2
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.Lpic2:
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popl %ebx
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addl $_GLOBAL_OFFSET_TABLE_+[.-.Lpic2],%ebx
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#endif
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// int i;
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// int val;
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#ifdef PIC
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movl C(snd_linear_count)@GOTOFF(%ebx),%ecx
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movl C(snd_vol)@GOTOFF(%ebx),%esi
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movl C(snd_out)@GOTOFF(%ebx),%edi
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movl C(snd_p)@GOTOFF(%ebx),%ebx
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#else
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movl C(snd_linear_count),%ecx
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movl C(snd_vol),%esi
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movl C(snd_out),%edi
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movl C(snd_p),%ebx
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#endif
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// for (i=0 ; i<snd_linear_count ; i+=2)
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// {
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LWLBLoopTop:
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// val = (snd_p[i]*snd_vol)>>8;
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// if (val > 0x7fff)
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// snd_out[i] = 0x7fff;
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// else if (val < (short)0x8000)
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// snd_out[i] = (short)0x8000;
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// else
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// snd_out[i] = val;
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movl -8(%ebx,%ecx,4),%eax
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imull %esi,%eax
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sarl $8,%eax
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cmpl $0x7FFF,%eax
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jg LClampHigh
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cmpl $0xFFFF8000,%eax
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jnl LClampDone
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movl $0xFFFF8000,%eax
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jmp LClampDone
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LClampHigh:
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movl $0x7FFF,%eax
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LClampDone:
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// val = (snd_p[i+1]*snd_vol)>>8;
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// if (val > 0x7fff)
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// snd_out[i+1] = 0x7fff;
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// else if (val < (short)0x8000)
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// snd_out[i+1] = (short)0x8000;
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// else
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// snd_out[i+1] = val;
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movl -4(%ebx,%ecx,4),%edx
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imull %esi,%edx
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sarl $8,%edx
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cmpl $0x7FFF,%edx
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jg LClampHigh2
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cmpl $0xFFFF8000,%edx
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jnl LClampDone2
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movl $0xFFFF8000,%edx
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jmp LClampDone2
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LClampHigh2:
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movl $0x7FFF,%edx
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LClampDone2:
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shll $16,%edx
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andl $0xFFFF,%eax
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orl %eax,%edx
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movl %edx,-4(%edi,%ecx,2)
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// }
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subl $2,%ecx
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jnz LWLBLoopTop
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// snd_p += snd_linear_count;
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popl %ebx
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popl %edi
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popl %esi
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ret
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#ifdef PIC
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.Lfe2:
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.size C(Snd_WriteLinearBlastStereo16),.Lfe2-C(Snd_WriteLinearBlastStereo16)
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#endif
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#endif // USE_INTEL_ASM
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