345 lines
9.5 KiB
NASM
345 lines
9.5 KiB
NASM
;;###########################################################################
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;;
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;; FILE: IQNrmpy.asm
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;;
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;; TITLE: C Callable IQ Multiply With Rounding Math Function
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;;
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;;###########################################################################
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;;
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;; Ver | Date | Who | Description of changes
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;; =====|=============|=======|==============================================
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;; 1.2 | 11 Oct 2001 | A. T. | Original Release.
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;; -----|-------------|-------|----------------------------------------------
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;; 1.3 | 19 Nov 2001 | A. T. | No changes.
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;; -----|-------------|-------|----------------------------------------------
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;; 1.4 | 17 May 2002 | A. T. | Made correction to table pointer.
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;; | | | Corrected benchmark cycles.
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;; -----|-------------|-------|----------------------------------------------
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;; | | |
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;;
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;;###########################################################################
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;;===========================================================================
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;; Function: _IQNrmpy
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;;===========================================================================
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;;
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;; C Usage: extern long _IQNrmpy(long M, long X); // with rounding only
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;;
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;;---------------------------------------------------------------------------
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;;
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;; On Entry: ACC = M in IQ format
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;; [SP-4] = X in IQ format
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;;
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;; Regs Used: XT, P
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;;
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;; On Exit: ACC = M * X in IQ format
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;;
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;; Q range: 30 to 1
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;;
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;;---------------------------------------------------------------------------
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;; Algorithm: The IQmpy operation generates a 64-bit result. The 64-bit
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;; number must then be scaled back to a 32-bit value with the
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;; same Q value as the original inputs. For example: if Q = 27,
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;; then the multiplication of two I5Q27 numbers results in the
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;; following 64-bit value:
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;;
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;; I5Q27 * I5Q27 = I10Q54
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;;
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;; The value is then scaled back to an I5Q27 value as follows:
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;;
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;; I5Q27 = I10Q54 >> Q
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;;
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;; For some of the operations, the value is either rounded or
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;; saturated (or both) to its maximum value before scaling.
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;;
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;;---------------------------------------------------------------------------
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;; Benchmark:
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;;
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;; Cycles = 16 (Q >= 16, if Table in 0-wait SARAM, includes LCR/LRETR)
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;; 17 (Q <= 15, if Table in 0-wait SARAM, includes LCR/LRETR)
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;;
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;; Cycles = 18 (Q >= 16, if Table in 1-wait ROM, includes LCR/LRETR)
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;; 19 (Q <= 15, if Table in 1-wait ROM, includes LCR/LRETR)
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;;
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;;---------------------------------------------------------------------------
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;;#############################################################################
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;;!
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;;! Copyright: Copyright (C) 2023 Texas Instruments Incorporated -
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;;! All rights reserved not granted herein.
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;;! Limited License.
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;;!
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;;! Texas Instruments Incorporated grants a world-wide, royalty-free,
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;;! non-exclusive license under copyrights and patents it now or hereafter
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;;! owns or controls to make, have made, use, import, offer to sell and sell
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;;! ("Utilize") this software subject to the terms herein. With respect to the
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;;! foregoing patent license, such license is granted solely to the extent that
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;;! any such patent is necessary to Utilize the software alone. The patent
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;;! license shall not apply to any combinations which include this software,
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;;! other than combinations with devices manufactured by or for TI
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;;! ("TI Devices").
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;;! No hardware patent is licensed hereunder.
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;;!
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;;! Redistributions must preserve existing copyright notices and reproduce this
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;;! license (including the above copyright notice and the disclaimer and
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;;! (if applicable) source code license limitations below) in the documentation
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;;! and/or other materials provided with the distribution.
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;;!
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;;! Redistribution and use in binary form, without modification, are permitted
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;;! provided that the following conditions are met:
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;;!
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;;! * No reverse engineering, decompilation, or disassembly of this software is
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;;! permitted with respect to any software provided in binary form.
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;;! * Any redistribution and use are licensed by TI for use only
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;;! with TI Devices.
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;;! * Nothing shall obligate TI to provide you with source code for the
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;;! software licensed and provided to you in object code.
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;;!
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;;! If software source code is provided to you, modification and redistribution
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;;! of the source code are permitted provided that the following conditions
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;;! are met:
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;;!
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;;! * any redistribution and use of the source code, including any resulting
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;;! derivative works, are licensed by TI for use only with TI Devices.
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;;! * any redistribution and use of any object code compiled from the source
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;;! code and any resulting derivative works, are licensed by TI for use
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;;! only with TI Devices.
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;;!
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;;! Neither the name of Texas Instruments Incorporated nor the names of its
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;;! suppliers may be used to endorse or promote products derived from this
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;;! software without specific prior written permission.
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;;#############################################################################
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IQNrmpy .macro q_value, table
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MOVL XT,@ACC ; XT = M
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IMPYL P,XT,*-SP[4]
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QMPYL ACC,XT,*-SP[4] ; ACC:P = M * X
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MOVL XAR7,#table
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ADDUL P,*XAR7++ ; Round value
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ADDCL ACC,*XAR7++
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.if q_value >= 16
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LSL64 ACC:P,#(32 - q_value) ; Scale back to required IQ value
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.endif
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.if q_value <= 15
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LSL64 ACC:P,#16 ; Scale back to required IQ value
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LSL64 ACC:P,#(16 - q_value)
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.endif
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LRETR
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.endm
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;; The value "GLOBAL_Q" needs to be supplied by the assembler
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;; using the "-dGLOBAL_Q=q_value" directive:
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.sect "IQmath"
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.if GLOBAL_Q == 30
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.ref _IQ30mpyRndSatTable
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.def __IQ30rmpy
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__IQ30rmpy:
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IQNrmpy GLOBAL_Q, _IQ30mpyRndSatTable
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.endif
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.if GLOBAL_Q == 29
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.ref _IQ29mpyRndSatTable
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.def __IQ29rmpy
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__IQ29rmpy:
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IQNrmpy GLOBAL_Q, _IQ29mpyRndSatTable
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.endif
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.if GLOBAL_Q == 28
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.ref _IQ28mpyRndSatTable
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.def __IQ28rmpy
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__IQ28rmpy:
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IQNrmpy GLOBAL_Q, _IQ28mpyRndSatTable
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.endif
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.if GLOBAL_Q == 27
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.ref _IQ27mpyRndSatTable
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.def __IQ27rmpy
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__IQ27rmpy:
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IQNrmpy GLOBAL_Q, _IQ27mpyRndSatTable
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.endif
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.if GLOBAL_Q == 26
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.ref _IQ26mpyRndSatTable
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.def __IQ26rmpy
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__IQ26rmpy:
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IQNrmpy GLOBAL_Q, _IQ26mpyRndSatTable
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.endif
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.if GLOBAL_Q == 25
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.ref _IQ25mpyRndSatTable
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.def __IQ25rmpy
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__IQ25rmpy:
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IQNrmpy GLOBAL_Q, _IQ25mpyRndSatTable
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.endif
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.if GLOBAL_Q == 24
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.ref _IQ24mpyRndSatTable
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.def __IQ24rmpy
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__IQ24rmpy:
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IQNrmpy GLOBAL_Q, _IQ24mpyRndSatTable
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.endif
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.if GLOBAL_Q == 23
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.ref _IQ23mpyRndSatTable
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.def __IQ23rmpy
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__IQ23rmpy:
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IQNrmpy GLOBAL_Q, _IQ23mpyRndSatTable
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.endif
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.if GLOBAL_Q == 22
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.ref _IQ22mpyRndSatTable
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.def __IQ22rmpy
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__IQ22rmpy:
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IQNrmpy GLOBAL_Q, _IQ22mpyRndSatTable
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.endif
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.if GLOBAL_Q == 21
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.ref _IQ21mpyRndSatTable
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.def __IQ21rmpy
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__IQ21rmpy:
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IQNrmpy GLOBAL_Q, _IQ21mpyRndSatTable
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.endif
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.if GLOBAL_Q == 20
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.ref _IQ20mpyRndSatTable
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.def __IQ20rmpy
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__IQ20rmpy:
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IQNrmpy GLOBAL_Q, _IQ20mpyRndSatTable
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.endif
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.if GLOBAL_Q == 19
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.ref _IQ19mpyRndSatTable
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.def __IQ19rmpy
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__IQ19rmpy:
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IQNrmpy GLOBAL_Q, _IQ19mpyRndSatTable
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.endif
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.if GLOBAL_Q == 18
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.ref _IQ18mpyRndSatTable
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.def __IQ18rmpy
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__IQ18rmpy:
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IQNrmpy GLOBAL_Q, _IQ18mpyRndSatTable
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.endif
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.if GLOBAL_Q == 17
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.ref _IQ17mpyRndSatTable
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.def __IQ17rmpy
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__IQ17rmpy:
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IQNrmpy GLOBAL_Q, _IQ17mpyRndSatTable
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.endif
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.if GLOBAL_Q == 16
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.ref _IQ16mpyRndSatTable
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.def __IQ16rmpy
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__IQ16rmpy:
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IQNrmpy GLOBAL_Q, _IQ16mpyRndSatTable
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.endif
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.if GLOBAL_Q == 15
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.ref _IQ15mpyRndSatTable
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.def __IQ15rmpy
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__IQ15rmpy:
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IQNrmpy GLOBAL_Q, _IQ15mpyRndSatTable
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.endif
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.if GLOBAL_Q == 14
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.ref _IQ14mpyRndSatTable
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.def __IQ14rmpy
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__IQ14rmpy:
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IQNrmpy GLOBAL_Q, _IQ14mpyRndSatTable
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.endif
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.if GLOBAL_Q == 13
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.ref _IQ13mpyRndSatTable
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.def __IQ13rmpy
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__IQ13rmpy:
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IQNrmpy GLOBAL_Q, _IQ13mpyRndSatTable
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.endif
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.if GLOBAL_Q == 12
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.ref _IQ12mpyRndSatTable
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.def __IQ12rmpy
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__IQ12rmpy:
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IQNrmpy GLOBAL_Q, _IQ12mpyRndSatTable
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.endif
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.if GLOBAL_Q == 11
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.ref _IQ11mpyRndSatTable
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.def __IQ11rmpy
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__IQ11rmpy:
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IQNrmpy GLOBAL_Q, _IQ11mpyRndSatTable
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.endif
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.if GLOBAL_Q == 10
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.ref _IQ10mpyRndSatTable
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.def __IQ10rmpy
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__IQ10rmpy:
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IQNrmpy GLOBAL_Q, _IQ10mpyRndSatTable
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.endif
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.if GLOBAL_Q == 9
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.ref _IQ9mpyRndSatTable
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.def __IQ9rmpy
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__IQ9rmpy:
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IQNrmpy GLOBAL_Q, _IQ9mpyRndSatTable
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.endif
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.if GLOBAL_Q == 8
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.ref _IQ8mpyRndSatTable
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.def __IQ8rmpy
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__IQ8rmpy:
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IQNrmpy GLOBAL_Q, _IQ8mpyRndSatTable
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.endif
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.if GLOBAL_Q == 7
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.ref _IQ7mpyRndSatTable
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.def __IQ7rmpy
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__IQ7rmpy:
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IQNrmpy GLOBAL_Q, _IQ7mpyRndSatTable
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.endif
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.if GLOBAL_Q == 6
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.ref _IQ6mpyRndSatTable
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.def __IQ6rmpy
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__IQ6rmpy:
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IQNrmpy GLOBAL_Q, _IQ6mpyRndSatTable
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.endif
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.if GLOBAL_Q == 5
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.ref _IQ5mpyRndSatTable
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.def __IQ5rmpy
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__IQ5rmpy:
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IQNrmpy GLOBAL_Q, _IQ5mpyRndSatTable
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.endif
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.if GLOBAL_Q == 4
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.ref _IQ4mpyRndSatTable
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.def __IQ4rmpy
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__IQ4rmpy:
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IQNrmpy GLOBAL_Q, _IQ4mpyRndSatTable
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.endif
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.if GLOBAL_Q == 3
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.ref _IQ3mpyRndSatTable
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.def __IQ3rmpy
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__IQ3rmpy:
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IQNrmpy GLOBAL_Q, _IQ3mpyRndSatTable
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.endif
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.if GLOBAL_Q == 2
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.ref _IQ2mpyRndSatTable
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.def __IQ2rmpy
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__IQ2rmpy:
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IQNrmpy GLOBAL_Q, _IQ2mpyRndSatTable
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.endif
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.if GLOBAL_Q == 1
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.ref _IQ1mpyRndSatTable
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.def __IQ1rmpy
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__IQ1rmpy:
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IQNrmpy GLOBAL_Q, _IQ1mpyRndSatTable
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.endif
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;;###########################################################################
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;; No More.
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;;###########################################################################
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