| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| /**************************************************************************************** |
| Portions of this file are derived from the following 3GPP standard: |
| |
| 3GPP TS 26.073 |
| ANSI-C code for the Adaptive Multi-Rate (AMR) speech codec |
| Available from http://www.3gpp.org |
| |
| (C) 2004, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) |
| Permission to distribute, modify and use this file under the standard license |
| terms listed above has been obtained from the copyright holder. |
| ****************************************************************************************/ |
| /* |
| |
| Filename: /audio/gsm_amr/c/include/mpy_32_16.h |
| |
| ------------------------------------------------------------------------------ |
| INCLUDE DESCRIPTION |
| |
| This file contains all the constant definitions and prototype definitions |
| needed by the Mpy_32_16 function. |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| /*---------------------------------------------------------------------------- |
| ; CONTINUE ONLY IF NOT ALREADY DEFINED |
| ----------------------------------------------------------------------------*/ |
| #ifndef MPY_32_16_H |
| #define MPY_32_16_H |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| #include "basicop_malloc.h" |
| |
| /*--------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| extern "C" |
| { |
| #endif |
| |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL VARIABLES REFERENCES |
| ; Declare variables used in this module but defined elsewhere |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; SIMPLE TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; ENUMERATED TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; STRUCTURES TYPEDEF'S |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; GLOBAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| #if defined(PV_ARM_V5) /* Instructions for ARM Assembly on ADS*/ |
| |
| __inline Word32 Mpy_32_16(Word16 L_var1_hi, |
| Word16 L_var1_lo, |
| Word16 var2, |
| Flag *pOverflow) |
| { |
| |
| Word32 L_product; |
| Word32 L_sum; |
| Word32 result; |
| |
| OSCL_UNUSED_ARG(pOverflow); |
| |
| __asm {SMULBB L_product, L_var1_hi, var2} |
| __asm {QDADD L_product, 0, L_product} |
| __asm {SMULBB result, L_var1_lo, var2} |
| result >>= 15; |
| __asm {QDADD L_sum, L_product, result} |
| return (L_sum); |
| } |
| |
| #elif defined(PV_ARM_GCC_V5) /* Instructions for ARM-linux cross-compiler*/ |
| |
| static inline Word32 Mpy_32_16(Word16 L_var1_hi, |
| Word16 L_var1_lo, |
| Word16 var2, |
| Flag *pOverflow) |
| { |
| |
| register Word32 ra = L_var1_hi; |
| register Word32 rb = L_var1_lo; |
| register Word32 rc = var2; |
| Word32 result, L_product; |
| |
| OSCL_UNUSED_ARG(pOverflow); |
| |
| asm volatile("smulbb %0, %1, %2" |
| : "=r"(L_product) |
| : "r"(ra), "r"(rc) |
| ); |
| asm volatile("mov %0, #0" |
| : "=r"(result) |
| ); |
| |
| asm volatile("qdadd %0, %1, %2" |
| : "=r"(L_product) |
| : "r"(result), "r"(L_product) |
| ); |
| |
| asm volatile("smulbb %0, %1, %2" |
| : "=r"(result) |
| : "r"(rb), "r"(rc) |
| ); |
| |
| asm volatile("mov %0, %1, ASR #15" |
| : "=r"(ra) |
| : "r"(result) |
| ); |
| asm volatile("qdadd %0, %1, %2" |
| : "=r"(result) |
| : "r"(L_product), "r"(ra) |
| ); |
| |
| return (result); |
| } |
| |
| #else /* C_EQUIVALENT */ |
| __inline Word32 Mpy_32_16(Word16 L_var1_hi, |
| Word16 L_var1_lo, |
| Word16 var2, |
| Flag *pOverflow) |
| { |
| |
| Word32 L_product; |
| Word32 L_sum; |
| Word32 result; |
| L_product = (Word32) L_var1_hi * var2; |
| |
| if (L_product != (Word32) 0x40000000L) |
| { |
| L_product <<= 1; |
| } |
| else |
| { |
| *pOverflow = 1; |
| L_product = MAX_32; |
| } |
| |
| result = ((Word32)L_var1_lo * var2) >> 15; |
| |
| L_sum = L_product + (result << 1); |
| |
| if ((L_product ^ result) > 0) |
| { |
| if ((L_sum ^ L_product) < 0) |
| { |
| L_sum = (L_product < 0) ? MIN_32 : MAX_32; |
| *pOverflow = 1; |
| } |
| } |
| return (L_sum); |
| |
| } |
| |
| #endif |
| /*---------------------------------------------------------------------------- |
| ; END |
| ----------------------------------------------------------------------------*/ |
| #ifdef __cplusplus |
| } |
| #endif |
| |
| #endif /* _MPY_32_16_H_ */ |
| |
| |
