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+/* ------------------------------------------------------------------
+ * 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.h
+
+------------------------------------------------------------------------------
+ REVISION HISTORY
+
+ Description: Updated function prototype declaration to reflect new interface.
+ A pointer to overflow flag is passed into the function. Updated
+ template.
+
+ Description: Moved _cplusplus #ifdef after Include section.
+
+ Description: Updated the function to include ARM and Linux-ARM assembly
+ instructions.
+
+ Description:
+
+------------------------------------------------------------------------------
+ INCLUDE DESCRIPTION
+
+ This file contains all the constant definitions and prototype definitions
+ needed by the Mpy_32 function.
+
+------------------------------------------------------------------------------
+*/
+
+/*----------------------------------------------------------------------------
+; CONTINUE ONLY IF NOT ALREADY DEFINED
+----------------------------------------------------------------------------*/
+#ifndef MPY_32_H
+#define MPY_32_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(Word16 L_var1_hi,
+ Word16 L_var1_lo,
+ Word16 L_var2_hi,
+ Word16 L_var2_lo,
+ Flag *pOverflow)
+
+ {
+ /*----------------------------------------------------------------------------
+ ; Define all local variables
+ ----------------------------------------------------------------------------*/
+ Word32 L_product;
+ Word32 L_sum;
+ Word32 product32;
+
+ OSCL_UNUSED_ARG(pOverflow);
+ /*----------------------------------------------------------------------------
+ ; Function body here
+ ----------------------------------------------------------------------------*/
+ /* L_product = L_mult (L_var1_hi, L_var2_hi, pOverflow);*/
+
+ __asm {SMULBB L_product, L_var1_hi, L_var2_hi}
+ __asm {QDADD L_product, 0, L_product}
+ __asm {SMULBB product32, L_var1_hi, L_var2_lo}
+ product32 >>= 15;
+ __asm {QDADD L_sum, L_product, product32}
+ L_product = L_sum;
+ __asm {SMULBB product32, L_var1_lo, L_var2_hi}
+ product32 >>= 15;
+ __asm {QDADD L_sum, L_product, product32}
+ return (L_sum);
+ }
+
+#elif defined(PV_ARM_GCC_V5) /* Instructions for ARM-linux cross-compiler*/
+
+ static inline Word32 Mpy_32(Word16 L_var1_hi,
+ Word16 L_var1_lo,
+ Word16 L_var2_hi,
+ Word16 L_var2_lo,
+ Flag *pOverflow)
+ {
+ register Word32 product32;
+ register Word32 L_sum;
+ register Word32 L_product, result;
+ register Word32 ra = L_var1_hi;
+ register Word32 rb = L_var1_lo;
+ register Word32 rc = L_var2_hi;
+ register Word32 rd = L_var2_lo;
+
+
+
+ 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_sum)
+ : "r"(result), "r"(L_product)
+ );
+
+ asm volatile("smulbb %0, %1, %2"
+ : "=r"(product32)
+ : "r"(ra), "r"(rd)
+ );
+
+ asm volatile("mov %0, %1, ASR #15"
+ : "=r"(ra)
+ : "r"(product32)
+ );
+ asm volatile("qdadd %0, %1, %2"
+ : "=r"(L_product)
+ : "r"(L_sum), "r"(ra)
+ );
+
+ asm volatile("smulbb %0, %1, %2"
+ : "=r"(product32)
+ : "r"(rb), "r"(rc)
+ );
+
+ asm volatile("mov %0, %1, ASR #15"
+ : "=r"(rb)
+ : "r"(product32)
+ );
+
+ asm volatile("qdadd %0, %1, %2"
+ : "=r"(L_sum)
+ : "r"(L_product), "r"(rb)
+ );
+
+ return (L_sum);
+ }
+
+#else /* C_EQUIVALENT */
+
+ __inline Word32 Mpy_32(Word16 L_var1_hi,
+ Word16 L_var1_lo,
+ Word16 L_var2_hi,
+ Word16 L_var2_lo,
+ Flag *pOverflow)
+ {
+ Word32 L_product;
+ Word32 L_sum;
+ Word32 product32;
+
+ OSCL_UNUSED_ARG(pOverflow);
+ L_product = (Word32) L_var1_hi * L_var2_hi;
+
+ if (L_product != (Word32) 0x40000000L)
+ {
+ L_product <<= 1;
+ }
+ else
+ {
+ L_product = MAX_32;
+ }
+
+ /* result = mult (L_var1_hi, L_var2_lo, pOverflow); */
+ product32 = ((Word32) L_var1_hi * L_var2_lo) >> 15;
+
+ /* L_product = L_mac (L_product, result, 1, pOverflow); */
+ L_sum = L_product + (product32 << 1);
+
+ if ((L_product ^ product32) > 0)
+ {
+ if ((L_sum ^ L_product) < 0)
+ {
+ L_sum = (L_product < 0) ? MIN_32 : MAX_32;
+ }
+ }
+
+ L_product = L_sum;
+
+ /* result = mult (L_var1_lo, L_var2_hi, pOverflow); */
+ product32 = ((Word32) L_var1_lo * L_var2_hi) >> 15;
+
+ /* L_product = L_mac (L_product, result, 1, pOverflow); */
+ L_sum = L_product + (product32 << 1);
+
+ if ((L_product ^ product32) > 0)
+ {
+ if ((L_sum ^ L_product) < 0)
+ {
+ L_sum = (L_product < 0) ? MIN_32 : MAX_32;
+ }
+ }
+
+ /*----------------------------------------------------------------------------
+ ; Return nothing or data or data pointer
+ ----------------------------------------------------------------------------*/
+ return (L_sum);
+ }
+
+#endif
+ /*----------------------------------------------------------------------------
+ ; END
+ ----------------------------------------------------------------------------*/
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _MPY_32_H_ */
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