From 952c5c128f9efaea89d41d882c4ea3ade7df4591 Mon Sep 17 00:00:00 2001
From: zakk <zakk@edf5b092-35ff-0310-97b2-ce42778d08ea>
Date: Fri, 26 Aug 2005 04:48:05 +0000
Subject: Itsa me, quake3io!

git-svn-id: svn://svn.icculus.org/quake3/trunk@2 edf5b092-35ff-0310-97b2-ce42778d08ea
---
 code/unix/snd_mixa.s | 217 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 217 insertions(+)
 create mode 100755 code/unix/snd_mixa.s

(limited to 'code/unix/snd_mixa.s')

diff --git a/code/unix/snd_mixa.s b/code/unix/snd_mixa.s
new file mode 100755
index 0000000..3fc35a8
--- /dev/null
+++ b/code/unix/snd_mixa.s
@@ -0,0 +1,217 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+
+This file is part of Quake III Arena source code.
+
+Quake III Arena source code is free software; you can redistribute it
+and/or modify it under the terms of the GNU General Public License as
+published by the Free Software Foundation; either version 2 of the License,
+or (at your option) any later version.
+
+Quake III Arena source code 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.
+
+You should have received a copy of the GNU General Public License
+along with Foobar; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+//
+// snd_mixa.s
+// x86 assembly-language sound code
+//
+
+#include "qasm.h"
+
+#if	id386
+
+	.text
+
+#if 0 
+//----------------------------------------------------------------------
+// 8-bit sound-mixing code
+//----------------------------------------------------------------------
+
+#define ch		4+16
+#define sc		8+16
+#define count	12+16
+
+.globl C(S_PaintChannelFrom8)
+C(S_PaintChannelFrom8):
+	pushl	%esi				// preserve register variables
+	pushl	%edi
+	pushl	%ebx
+	pushl	%ebp
+
+//	int 	data;
+//	short	*lscale, *rscale;
+//	unsigned char *sfx;
+//	int		i;
+
+	movl	ch(%esp),%ebx
+	movl	sc(%esp),%esi
+
+//	if (ch->leftvol > 255)
+//		ch->leftvol = 255;
+//	if (ch->rightvol > 255)
+//		ch->rightvol = 255;
+	movl	ch_leftvol(%ebx),%eax
+	movl	ch_rightvol(%ebx),%edx
+	cmpl	$255,%eax
+	jna		LLeftSet
+	movl	$255,%eax
+LLeftSet:
+	cmpl	$255,%edx
+	jna		LRightSet
+	movl	$255,%edx
+LRightSet:
+
+//	lscale = snd_scaletable[ch->leftvol >> 3];
+//	rscale = snd_scaletable[ch->rightvol >> 3];
+//	sfx = (signed char *)sc->data + ch->pos;
+//	ch->pos += count;
+	andl	$0xF8,%eax
+	addl	$20,%esi
+	movl	(%esi),%esi
+	andl	$0xF8,%edx
+	movl	ch_pos(%ebx),%edi
+	movl	count(%esp),%ecx
+	addl	%edi,%esi
+	shll	$7,%eax
+	addl	%ecx,%edi
+	shll	$7,%edx
+	movl	%edi,ch_pos(%ebx)
+	addl	$(C(snd_scaletable)),%eax
+	addl	$(C(snd_scaletable)),%edx
+	subl	%ebx,%ebx
+	movb	-1(%esi,%ecx,1),%bl
+
+	testl	$1,%ecx
+	jz		LMix8Loop
+
+	movl	(%eax,%ebx,4),%edi
+	movl	(%edx,%ebx,4),%ebp
+	addl	C(paintbuffer)+psp_left-psp_size(,%ecx,psp_size),%edi
+	addl	C(paintbuffer)+psp_right-psp_size(,%ecx,psp_size),%ebp
+	movl	%edi,C(paintbuffer)+psp_left-psp_size(,%ecx,psp_size)
+	movl	%ebp,C(paintbuffer)+psp_right-psp_size(,%ecx,psp_size)
+	movb	-2(%esi,%ecx,1),%bl
+
+	decl	%ecx
+	jz		LDone
+
+//	for (i=0 ; i<count ; i++)
+//	{
+LMix8Loop:
+
+//		data = sfx[i];
+//		paintbuffer[i].left += lscale[data];
+//		paintbuffer[i].right += rscale[data];
+	movl	(%eax,%ebx,4),%edi
+	movl	(%edx,%ebx,4),%ebp
+	addl	C(paintbuffer)+psp_left-psp_size(,%ecx,psp_size),%edi
+	addl	C(paintbuffer)+psp_right-psp_size(,%ecx,psp_size),%ebp
+	movb	-2(%esi,%ecx,1),%bl
+	movl	%edi,C(paintbuffer)+psp_left-psp_size(,%ecx,psp_size)
+	movl	%ebp,C(paintbuffer)+psp_right-psp_size(,%ecx,psp_size)
+
+	movl	(%eax,%ebx,4),%edi
+	movl	(%edx,%ebx,4),%ebp
+	movb	-3(%esi,%ecx,1),%bl
+	addl	C(paintbuffer)+psp_left-psp_size*2(,%ecx,psp_size),%edi
+	addl	C(paintbuffer)+psp_right-psp_size*2(,%ecx,psp_size),%ebp
+	movl	%edi,C(paintbuffer)+psp_left-psp_size*2(,%ecx,psp_size)
+	movl	%ebp,C(paintbuffer)+psp_right-psp_size*2(,%ecx,psp_size)
+
+//	}
+	subl	$2,%ecx
+	jnz		LMix8Loop
+
+LDone:
+	popl	%ebp
+	popl	%ebx
+	popl	%edi
+	popl	%esi
+
+	ret
+
+
+#endif
+
+//----------------------------------------------------------------------
+// Transfer of stereo buffer to 16-bit DMA buffer code
+//----------------------------------------------------------------------
+
+.globl C(S_WriteLinearBlastStereo16)
+C(S_WriteLinearBlastStereo16):
+	pushl	%edi
+	pushl	%ebx
+
+//	int		i;
+//	int		val;
+	movl	C(snd_linear_count),%ecx
+	movl	C(snd_p),%ebx
+	movl	C(snd_out),%edi
+
+//	for (i=0 ; i<snd_linear_count ; i+=2)
+//	{
+LWLBLoopTop:
+
+//		val = (snd_p[i]*snd_vol)>>8;
+//		if (val > 0x7fff)
+//			snd_out[i] = 0x7fff;
+//		else if (val < (short)0x8000)
+//			snd_out[i] = (short)0x8000;
+//		else
+//			snd_out[i] = val;
+	movl	-8(%ebx,%ecx,4),%eax
+	sarl	$8,%eax
+	cmpl	$0x7FFF,%eax
+	jg		LClampHigh
+	cmpl	$0xFFFF8000,%eax
+	jnl		LClampDone
+	movl	$0xFFFF8000,%eax
+	jmp		LClampDone
+LClampHigh:
+	movl	$0x7FFF,%eax
+LClampDone:
+
+//		val = (snd_p[i+1]*snd_vol)>>8;
+//		if (val > 0x7fff)
+//			snd_out[i+1] = 0x7fff;
+//		else if (val < (short)0x8000)
+//			snd_out[i+1] = (short)0x8000;
+//		else
+//			snd_out[i+1] = val;
+	movl	-4(%ebx,%ecx,4),%edx
+	sarl	$8,%edx
+	cmpl	$0x7FFF,%edx
+	jg		LClampHigh2
+	cmpl	$0xFFFF8000,%edx
+	jnl		LClampDone2
+	movl	$0xFFFF8000,%edx
+	jmp		LClampDone2
+LClampHigh2:
+	movl	$0x7FFF,%edx
+LClampDone2:
+	shll	$16,%edx
+	andl	$0xFFFF,%eax
+	orl		%eax,%edx
+	movl	%edx,-4(%edi,%ecx,2)
+
+//	}
+	subl	$2,%ecx
+	jnz		LWLBLoopTop
+
+//	snd_p += snd_linear_count;
+
+	popl	%ebx
+	popl	%edi
+
+	ret
+
+#endif	// id386
+
-- 
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