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//=============================================================================
// AL
// Audio Utility Library
// $Id: dsp.cpp,v 1.1.2.1 2009/12/06 01:39:33 terminator356 Exp $
//
// Copyright (C) 2002-2006 by Werner Schweer and others
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 2.
//
// 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.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//=============================================================================
#include <stdio.h>
#include <stdint.h>
#include "dsp.h"
#include "config.h"
#include "../globals.h"
namespace AL {
Dsp* dsp = 0;
#ifdef __i386__
//---------------------------------------------------------
// DspSSE86
//---------------------------------------------------------
extern "C" {
extern float x86_sse_compute_peak(float*, unsigned, float);
extern void x86_sse_apply_gain_to_buffer(float*, unsigned, float);
extern void x86_sse_mix_buffers_with_gain(float*, float*, unsigned, float);
extern void x86_sse_mix_buffers_no_gain(float*, float*, unsigned);
};
class DspSSE86 : public Dsp {
public:
DspSSE86() {}
virtual ~DspSSE86() {}
virtual float peak(float* buf, unsigned n, float current) {
if ( ((intptr_t)buf % 16) != 0) {
fprintf(stderr, "peak(): buffer unaligned! (%p)\n", buf);
return Dsp::peak(buf, n, current);
}
return x86_sse_compute_peak(buf, n, current);
}
virtual void applyGainToBuffer(float* buf, unsigned n, float gain) {
if ( ((intptr_t)buf % 16) != 0) {
fprintf(stderr, "applyGainToBuffer(): buffer unaligned! (%p)\n", buf);
Dsp::applyGainToBuffer(buf, n, gain);
}
else
x86_sse_apply_gain_to_buffer(buf, n, gain);
}
virtual void mixWithGain(float* dst, float* src, unsigned n, float gain) {
if ( ((intptr_t)dst & 15) != 0)
fprintf(stderr, "mixWithGainain(): dst unaligned! (%p)\n", dst);
if (((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
fprintf(stderr, "mixWithGain(): dst & src don't have the same alignment!\n");
Dsp::mixWithGain(dst, src,n, gain);
}
else
x86_sse_mix_buffers_with_gain(dst, src, n, gain);
}
virtual void mix(float* dst, float* src, unsigned n) {
if ( ((intptr_t)dst & 15) != 0)
fprintf(stderr, "mix_buffers_no_gain(): dst unaligned! %p\n", dst);
if ( ((intptr_t)dst & 15) != ((intptr_t)src & 15) ) {
fprintf(stderr, "mix_buffers_no_gain(): dst & src don't have the same alignment!\n");
Dsp::mix(dst, src, n);
}
else
x86_sse_mix_buffers_no_gain(dst, src, n);
}
};
#endif
//---------------------------------------------------------
// initDsp
//---------------------------------------------------------
void initDsp()
{
#if 0 // Disabled for now.
#if defined(__i386__) || defined(__x86_64__)
if(debugMsg)
printf("Muse: __i386__ or __x86_64__ defined. Using optimized float buffer copying (asm movsl).\n");
#else
if(debugMsg)
printf("Muse: __i386__ or __x86_64__ not defined. Using non-optimized memcpy for float buffer copying.\n");
#endif
#endif
#if defined(__i386__) && defined(USE_SSE)
unsigned long useSSE = 0;
if(debugMsg)
printf("initDsp: __i386__ and USE_SSE defined\n");
// FIXME: 64? Shouldn't these routines work on 32 bit?
#ifdef __x86_64__
useSSE = 1 << 25; // we know the platform has SSE
if(debugMsg)
printf("initDsp: __x86_64__ defined\n");
#else
if(debugMsg)
printf("initDsp: getting cpuid via asm\n");
asm (
"mov $1, %%eax\n"
"pushl %%ebx\n"
"cpuid\n"
"movl %%edx, %0\n"
"popl %%ebx\n"
: "=r" (useSSE)
:
: "%eax", "%ecx", "%edx", "memory");
#endif
if(debugMsg)
printf("initDsp: checking for bit 25 SSE support:%lX\n", useSSE);
useSSE &= (1 << 25); // bit 25 = SSE support
if (useSSE) {
printf("Using SSE optimized routines\n");
dsp = new DspSSE86();
return;
}
// fall through to not hardware optimized routines
#endif
if(debugMsg)
printf("Muse: using unoptimized non-SSE dsp routines\n");
dsp = new Dsp();
}
//---------------------------------------------------------
// exitDsp
//---------------------------------------------------------
void exitDsp()
{
if(dsp)
delete dsp;
dsp = 0;
}
void Dsp::cpy(float* dst, float* src, unsigned n)
{
// FIXME: Changed by T356. Not defined. Where are these???
//#if defined(ARCH_X86) || defined(ARCH_X86_64)
///#if defined(__i386__) || defined(__x86_64__)
#if 0 // Disabled for now.
//printf("Dsp: using asm cpy\n");
// Changed by T356. Get To and From not declared in scope compile errors.
//register unsigned long int dummy;
//__asm__ __volatile__ ("rep; movsl" :"=&D"(dst), "=&S"(src), "=&c"(dummy) :"0" (to), "1" (from),"2" (n) : "memory");
// FIXME: FIXME: I don't think this is correct but it works so far...
// Tried clobbering, get "Can't find a register in class `CREG' while reloading `asm'"
__asm__ __volatile__ (
"cld\n\t"
"rep\n\t"
"movsl"
:
: "S" (src), "D" (dst), "c" (n)
: "memory"
);
//: "%ecx", "%esi", "%edi", "memory"
#else
//printf("Dsp: using memcpy\n");
memcpy(dst, src, sizeof(float) * n);
#endif
}
} // namespace AL
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