aboutsummaryrefslogtreecommitdiffstats
path: root/code/unix/snd_mixa.s
diff options
context:
space:
mode:
Diffstat (limited to 'code/unix/snd_mixa.s')
-rwxr-xr-xcode/unix/snd_mixa.s434
1 files changed, 217 insertions, 217 deletions
diff --git a/code/unix/snd_mixa.s b/code/unix/snd_mixa.s
index 3fc35a8..4c6be5b 100755
--- a/code/unix/snd_mixa.s
+++ b/code/unix/snd_mixa.s
@@ -1,217 +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
-
+/*
+===========================================================================
+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
+
generated by cgit v1.2.3 (git 2.39.1) at 2025-08-10 14:45:57 +0000