Remove inline assembly optimizations that give no speedup
These inline assembly versions are about as fast as what the compiler itself can do. However, when the compiler emits it by itself instead of via inline assembly, it can interleave the instructions with other instructions, improving scheduling. Silence the warnings in fixmul.h though, since the compiler is able to produce good enough code for the C version of these functions. This gives a speedup on both GCC and clang.
This commit is contained in:
Martin Storsjo
parent
49961c4af9
commit
3916055ddf
@ -1,122 +0,0 @@
|
||||
|
||||
/* -----------------------------------------------------------------------------------------------------------
|
||||
Software License for The Fraunhofer FDK AAC Codec Library for Android
|
||||
|
||||
© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
|
||||
All rights reserved.
|
||||
|
||||
1. INTRODUCTION
|
||||
The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
|
||||
the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
|
||||
This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
|
||||
|
||||
AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
|
||||
audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
|
||||
independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
|
||||
of the MPEG specifications.
|
||||
|
||||
Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
|
||||
may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
|
||||
individually for the purpose of encoding or decoding bit streams in products that are compliant with
|
||||
the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
|
||||
these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
|
||||
software may already be covered under those patent licenses when it is used for those licensed purposes only.
|
||||
|
||||
Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
|
||||
are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
|
||||
applications information and documentation.
|
||||
|
||||
2. COPYRIGHT LICENSE
|
||||
|
||||
Redistribution and use in source and binary forms, with or without modification, are permitted without
|
||||
payment of copyright license fees provided that you satisfy the following conditions:
|
||||
|
||||
You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
|
||||
your modifications thereto in source code form.
|
||||
|
||||
You must retain the complete text of this software license in the documentation and/or other materials
|
||||
provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
|
||||
You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
|
||||
modifications thereto to recipients of copies in binary form.
|
||||
|
||||
The name of Fraunhofer may not be used to endorse or promote products derived from this library without
|
||||
prior written permission.
|
||||
|
||||
You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
|
||||
software or your modifications thereto.
|
||||
|
||||
Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
|
||||
and the date of any change. For modified versions of the FDK AAC Codec, the term
|
||||
"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
|
||||
"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
|
||||
|
||||
3. NO PATENT LICENSE
|
||||
|
||||
NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
|
||||
ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
|
||||
respect to this software.
|
||||
|
||||
You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
|
||||
by appropriate patent licenses.
|
||||
|
||||
4. DISCLAIMER
|
||||
|
||||
This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
|
||||
"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
|
||||
of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
||||
CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
|
||||
including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
|
||||
or business interruption, however caused and on any theory of liability, whether in contract, strict
|
||||
liability, or tort (including negligence), arising in any way out of the use of this software, even if
|
||||
advised of the possibility of such damage.
|
||||
|
||||
5. CONTACT INFORMATION
|
||||
|
||||
Fraunhofer Institute for Integrated Circuits IIS
|
||||
Attention: Audio and Multimedia Departments - FDK AAC LL
|
||||
Am Wolfsmantel 33
|
||||
91058 Erlangen, Germany
|
||||
|
||||
www.iis.fraunhofer.de/amm
|
||||
amm-info@iis.fraunhofer.de
|
||||
----------------------------------------------------------------------------------------------------------- */
|
||||
|
||||
/*************************** Fraunhofer IIS FDK Tools **********************
|
||||
|
||||
Author(s):
|
||||
Description: fixed point intrinsics
|
||||
|
||||
******************************************************************************/
|
||||
|
||||
#if defined(__aarch64__) || defined(__AARCH64EL__) && defined(__GNUC__) /* cppp replaced: elif */
|
||||
|
||||
#define FUNCTION_cplxMultDiv2_32x32X2
|
||||
//#define FUNCTION_cplxMult_32x32X2
|
||||
|
||||
#ifdef FUNCTION_cplxMultDiv2_32x32X2
|
||||
inline void cplxMultDiv2( FIXP_DBL *c_Re,
|
||||
FIXP_DBL *c_Im,
|
||||
const FIXP_DBL a_Re,
|
||||
const FIXP_DBL a_Im,
|
||||
const FIXP_DBL b_Re,
|
||||
const FIXP_DBL b_Im)
|
||||
{
|
||||
LONG tmp1, tmp2;
|
||||
|
||||
|
||||
asm(
|
||||
"smulh %w0, %w2, %w4;\n" /* tmp1 = a_Re * b_Re */
|
||||
"msub %w0, %w3, %w5, %w0;\n" /* tmp1 -= a_Im * b_Im */
|
||||
"smulh %w1, %w2, %w5;\n" /* tmp2 = a_Re * b_Im */
|
||||
"madd %w1, %w3, %w4, %w1;\n" /* tmp2 += a_Im * b_Re */
|
||||
: "=&r"(tmp1), "=&r"(tmp2)
|
||||
: "r"(a_Re), "r"(a_Im), "r"(b_Re), "r"(b_Im)
|
||||
);
|
||||
|
||||
*c_Re = tmp1;
|
||||
*c_Im = tmp2;
|
||||
}
|
||||
#endif /* FUNCTION_cplxMultDiv2_32x32X2 */
|
||||
|
||||
#endif
|
||||
|
||||
@ -1,130 +0,0 @@
|
||||
|
||||
/* -----------------------------------------------------------------------------------------------------------
|
||||
Software License for The Fraunhofer FDK AAC Codec Library for Android
|
||||
|
||||
© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
|
||||
All rights reserved.
|
||||
|
||||
1. INTRODUCTION
|
||||
The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
|
||||
the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
|
||||
This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
|
||||
|
||||
AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
|
||||
audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
|
||||
independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
|
||||
of the MPEG specifications.
|
||||
|
||||
Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
|
||||
may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
|
||||
individually for the purpose of encoding or decoding bit streams in products that are compliant with
|
||||
the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
|
||||
these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
|
||||
software may already be covered under those patent licenses when it is used for those licensed purposes only.
|
||||
|
||||
Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
|
||||
are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
|
||||
applications information and documentation.
|
||||
|
||||
2. COPYRIGHT LICENSE
|
||||
|
||||
Redistribution and use in source and binary forms, with or without modification, are permitted without
|
||||
payment of copyright license fees provided that you satisfy the following conditions:
|
||||
|
||||
You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
|
||||
your modifications thereto in source code form.
|
||||
|
||||
You must retain the complete text of this software license in the documentation and/or other materials
|
||||
provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
|
||||
You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
|
||||
modifications thereto to recipients of copies in binary form.
|
||||
|
||||
The name of Fraunhofer may not be used to endorse or promote products derived from this library without
|
||||
prior written permission.
|
||||
|
||||
You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
|
||||
software or your modifications thereto.
|
||||
|
||||
Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
|
||||
and the date of any change. For modified versions of the FDK AAC Codec, the term
|
||||
"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
|
||||
"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
|
||||
|
||||
3. NO PATENT LICENSE
|
||||
|
||||
NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
|
||||
ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
|
||||
respect to this software.
|
||||
|
||||
You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
|
||||
by appropriate patent licenses.
|
||||
|
||||
4. DISCLAIMER
|
||||
|
||||
This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
|
||||
"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
|
||||
of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
||||
CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
|
||||
including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
|
||||
or business interruption, however caused and on any theory of liability, whether in contract, strict
|
||||
liability, or tort (including negligence), arising in any way out of the use of this software, even if
|
||||
advised of the possibility of such damage.
|
||||
|
||||
5. CONTACT INFORMATION
|
||||
|
||||
Fraunhofer Institute for Integrated Circuits IIS
|
||||
Attention: Audio and Multimedia Departments - FDK AAC LL
|
||||
Am Wolfsmantel 33
|
||||
91058 Erlangen, Germany
|
||||
|
||||
www.iis.fraunhofer.de/amm
|
||||
amm-info@iis.fraunhofer.de
|
||||
----------------------------------------------------------------------------------------------------------- */
|
||||
|
||||
/*************************** Fraunhofer IIS FDK Tools **********************
|
||||
|
||||
Author(s):
|
||||
Description: fixed point intrinsics
|
||||
|
||||
******************************************************************************/
|
||||
|
||||
#if defined(__aarch64__) || defined(__AARCH64EL__)
|
||||
|
||||
/* ############################################################################# */
|
||||
#if defined(__GNUC__) /* cppp replaced: elif */
|
||||
/* ############################################################################# */
|
||||
/* AARCH64 GNU GCC */
|
||||
|
||||
#define FUNCTION_fixmadddiv2_DD
|
||||
|
||||
inline FIXP_DBL fixmadddiv2_DD (FIXP_DBL x, const FIXP_DBL a, const FIXP_DBL b) {
|
||||
INT result;
|
||||
asm ("smull %0, %w1, %w2\n"
|
||||
"asr %0, %0, #32\n"
|
||||
"add %w0, %w0, %w3\n"
|
||||
: "=&r" (result)
|
||||
: "r" (a), "r" (b), "r"(x) );
|
||||
return result ;
|
||||
}
|
||||
|
||||
#define FUNCTION_fixmadddiv2BitExact_DD
|
||||
#define fixmadddiv2BitExact_DD(a, b, c) fixmadddiv2_DD(a, b, c)
|
||||
|
||||
#define FUNCTION_fixmsubdiv2BitExact_DD
|
||||
inline FIXP_DBL fixmsubdiv2BitExact_DD (FIXP_DBL x, const FIXP_DBL a, const FIXP_DBL b) {
|
||||
return x - fixmuldiv2BitExact_DD(a, b);
|
||||
}
|
||||
|
||||
#define FUNCTION_fixmadddiv2BitExact_DS
|
||||
#define fixmadddiv2BitExact_DS(a, b, c) fixmadddiv2_DS(a, b, c)
|
||||
|
||||
#define FUNCTION_fixmsubdiv2BitExact_DS
|
||||
inline FIXP_DBL fixmsubdiv2BitExact_DS (FIXP_DBL x, const FIXP_DBL a, const FIXP_SGL b) {
|
||||
return x - fixmuldiv2BitExact_DS(a, b);
|
||||
}
|
||||
/* ############################################################################# */
|
||||
#endif /* toolchain */
|
||||
/* ############################################################################# */
|
||||
|
||||
#endif /* __aarch64__ */
|
||||
|
||||
@ -1,122 +0,0 @@
|
||||
|
||||
/* -----------------------------------------------------------------------------------------------------------
|
||||
Software License for The Fraunhofer FDK AAC Codec Library for Android
|
||||
|
||||
© Copyright 1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
|
||||
All rights reserved.
|
||||
|
||||
1. INTRODUCTION
|
||||
The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
|
||||
the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
|
||||
This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
|
||||
|
||||
AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
|
||||
audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
|
||||
independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
|
||||
of the MPEG specifications.
|
||||
|
||||
Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
|
||||
may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
|
||||
individually for the purpose of encoding or decoding bit streams in products that are compliant with
|
||||
the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
|
||||
these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
|
||||
software may already be covered under those patent licenses when it is used for those licensed purposes only.
|
||||
|
||||
Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
|
||||
are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
|
||||
applications information and documentation.
|
||||
|
||||
2. COPYRIGHT LICENSE
|
||||
|
||||
Redistribution and use in source and binary forms, with or without modification, are permitted without
|
||||
payment of copyright license fees provided that you satisfy the following conditions:
|
||||
|
||||
You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
|
||||
your modifications thereto in source code form.
|
||||
|
||||
You must retain the complete text of this software license in the documentation and/or other materials
|
||||
provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
|
||||
You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
|
||||
modifications thereto to recipients of copies in binary form.
|
||||
|
||||
The name of Fraunhofer may not be used to endorse or promote products derived from this library without
|
||||
prior written permission.
|
||||
|
||||
You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
|
||||
software or your modifications thereto.
|
||||
|
||||
Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
|
||||
and the date of any change. For modified versions of the FDK AAC Codec, the term
|
||||
"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
|
||||
"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
|
||||
|
||||
3. NO PATENT LICENSE
|
||||
|
||||
NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
|
||||
ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
|
||||
respect to this software.
|
||||
|
||||
You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
|
||||
by appropriate patent licenses.
|
||||
|
||||
4. DISCLAIMER
|
||||
|
||||
This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
|
||||
"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
|
||||
of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
|
||||
CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
|
||||
including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
|
||||
or business interruption, however caused and on any theory of liability, whether in contract, strict
|
||||
liability, or tort (including negligence), arising in any way out of the use of this software, even if
|
||||
advised of the possibility of such damage.
|
||||
|
||||
5. CONTACT INFORMATION
|
||||
|
||||
Fraunhofer Institute for Integrated Circuits IIS
|
||||
Attention: Audio and Multimedia Departments - FDK AAC LL
|
||||
Am Wolfsmantel 33
|
||||
91058 Erlangen, Germany
|
||||
|
||||
www.iis.fraunhofer.de/amm
|
||||
amm-info@iis.fraunhofer.de
|
||||
----------------------------------------------------------------------------------------------------------- */
|
||||
|
||||
/*************************** Fraunhofer IIS FDK Tools **********************
|
||||
|
||||
Author(s):
|
||||
Description: fixed point intrinsics
|
||||
|
||||
******************************************************************************/
|
||||
|
||||
#if defined(__aarch64__) || defined(__AARCH64EL__)
|
||||
|
||||
#if defined(__GNUC__) /* cppp replaced: elif */
|
||||
/* ARM with GNU compiler */
|
||||
|
||||
#define FUNCTION_fixmuldiv2_DD
|
||||
|
||||
#define FUNCTION_fixmuldiv2BitExact_DD
|
||||
#define fixmuldiv2BitExact_DD(a,b) fixmuldiv2_DD(a,b)
|
||||
#define FUNCTION_fixmulBitExact_DD
|
||||
#define fixmulBitExact_DD(a,b) fixmul_DD(a,b)
|
||||
|
||||
#define FUNCTION_fixmuldiv2BitExact_DS
|
||||
#define fixmuldiv2BitExact_DS(a,b) fixmuldiv2_DS(a,b)
|
||||
|
||||
#define FUNCTION_fixmulBitExact_DS
|
||||
#define fixmulBitExact_DS(a,b) fixmul_DS(a,b)
|
||||
|
||||
inline INT fixmuldiv2_DD (const INT a, const INT b)
|
||||
{
|
||||
INT result ;
|
||||
__asm__ ("smull %0, %w1, %w2\n"
|
||||
"asr %0, %0, #32\n"
|
||||
: "=r" (result)
|
||||
: "r" (a), "r" (b)) ;
|
||||
return result ;
|
||||
}
|
||||
|
||||
#endif /* defined(__GNUC__) */
|
||||
|
||||
#endif /* __aarch64__ */
|
||||
|
||||
@ -99,9 +99,6 @@ amm-info@iis.fraunhofer.de
|
||||
#elif defined(__GNUC__) && defined(__mips__) && __mips_isa_rev < 6
|
||||
#include "mips/cplx_mul.h"
|
||||
|
||||
#elif defined(__aarch64__) || defined(__AARCH64EL__)
|
||||
#include "aarch64/cplx_mul.h"
|
||||
|
||||
#endif /* #if defined all cores: bfin, arm, etc. */
|
||||
|
||||
/* ############################################################################# */
|
||||
|
||||
@ -101,9 +101,6 @@ amm-info@iis.fraunhofer.de
|
||||
#elif defined(__mips__) /* cppp replaced: elif */
|
||||
#include "mips/fixmadd_mips.h"
|
||||
|
||||
#elif defined(__aarch64__) || defined(__AARCH64EL__) /* cppp replaced: elif */
|
||||
#include "aarch64/fixmadd_aarch64.h"
|
||||
|
||||
#endif /* all cores */
|
||||
|
||||
/*************************************************************************
|
||||
|
||||
@ -108,7 +108,7 @@ amm-info@iis.fraunhofer.de
|
||||
#include "ppc/fixmul_ppc.h"
|
||||
|
||||
#elif defined(__aarch64__) || defined(__AARCH64EL__)
|
||||
#include "aarch64/fixmul_aarch64.h"
|
||||
#define NO_WARN_FIXMUL
|
||||
|
||||
#endif /* all cores */
|
||||
|
||||
@ -120,11 +120,13 @@ amm-info@iis.fraunhofer.de
|
||||
|
||||
#if !defined(FUNCTION_fixmuldiv2_DD)
|
||||
#define FUNCTION_fixmuldiv2_DD
|
||||
#ifndef NO_WARN_FIXMUL
|
||||
#if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__)
|
||||
#pragma message ("Extremely slow implementation of fixmuldiv2_DD !!")
|
||||
#else
|
||||
#warning Extremely slow implementation of fixmuldiv2_DD !!
|
||||
#endif
|
||||
#endif
|
||||
inline LONG fixmuldiv2_DD (const LONG a, const LONG b)
|
||||
{
|
||||
return (LONG) ((((INT64)a) * b) >> 32) ;
|
||||
@ -133,11 +135,13 @@ inline LONG fixmuldiv2_DD (const LONG a, const LONG b)
|
||||
|
||||
#if !defined(FUNCTION_fixmuldiv2BitExact_DD)
|
||||
#define FUNCTION_fixmuldiv2BitExact_DD
|
||||
#ifndef NO_WARN_FIXMUL
|
||||
#if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__)
|
||||
#pragma message ("Extremely slow implementation of fixmuldiv2BitExact_DD !!")
|
||||
#else
|
||||
#warning Extremely slow implementation of fixmuldiv2BitExact_DD !!
|
||||
#endif
|
||||
#endif
|
||||
inline LONG fixmuldiv2BitExact_DD (const LONG a, const LONG b)
|
||||
{
|
||||
return (LONG) ((((INT64)a) * b) >> 32) ;
|
||||
@ -152,11 +156,13 @@ inline LONG fixmul_DD (const LONG a, const LONG b)
|
||||
|
||||
#if !defined(FUNCTION_fixmulBitExact_DD)
|
||||
#define FUNCTION_fixmulBitExact_DD
|
||||
#ifndef NO_WARN_FIXMUL
|
||||
#if defined(_MSC_VER) || defined(__CC_ARM) || defined(__ANALOG_EXTENSIONS__) || defined(__TI_COMPILER_VERSION__) || defined(__XTENSA__)
|
||||
#pragma message ("Extremely slow implementation of fixmulBitExact_DD !!")
|
||||
#else
|
||||
#warning Extremely slow implementation of fixmulBitExact_DD !!
|
||||
#endif
|
||||
#endif
|
||||
inline LONG fixmulBitExact_DD (const LONG a, const LONG b)
|
||||
{
|
||||
return ( (LONG) ((((INT64)a) * b) >> 32) ) << 1;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user