MMOV32 mem32, MRa
Move 32-Bit Floating-Point Register Contents to Memory
Operands
MRa
floating-point register (MR0 to MR3)
mem32
32-bit destination memory accessed using one of the available
addressing modes
Opcode
LSW: mmmm mmmm mmmm mmmm
MSW: 0111 0100 11aa addr
Description
Move from MRa to 32-bit memory location indicated by mem32.
[mem32] = MRa;
Flags
This instruction modifies the following flags in the MSTF register:
Flag
TF
ZF
NF
LUF
LVF
Modified
No
No
No
No
No
No flags affected.
Pipeline
This is a single-cycle instruction.
Example
; Perform 5 multiply and accumulate operations:
;
; X and Y are 32-bit floating point arrays;
; 1st multiply: A = X0 * Y0
; 2nd multiply: B = X1 * Y1
; 3rd multiply: C = X2 * Y2
; 4th multiply: D = X3 * Y3
; 5th multiply: E = X3 * Y3;
; Result = A + B + C + D + E
;
_Cla1Task1:
MMOVI16 MAR0, #_X ; MAR0 points to X array
MMOVI16 MAR1, #_Y ; MAR1 points to Y array
MNOP ; Delay for MAR0, MAR1 load
MNOP ; Delay for MAR0, MAR1 load
; <-- MAR0 valid
MMOV32 MR0, *MAR0[2]++ ; MR0 = X0, MAR0 += 2
; <-- MAR1 valid
MMOV32 MR1, *MAR1[2]++ ; MR1 = Y0, MAR1 += 2
MMPYF32 MR2, MR0, MR1 ; MR2 = A = X0 * Y0
|| MMOV32 MR0, *MAR0[2]++ ; In parallel MR0 = X1, MAR0 += 2
MMOV32 MR1, *MAR1[2]++ ; MR1 = Y1, MAR1 += 2
MMPYF32 MR3, MR0, MR1 ; MR3 = B = X1 * Y1
|| MMOV32 MR0, *MAR0[2]++ ; In parallel MR0 = X2, MAR0 += 2
MMOV32 MR1, *MAR1[2]++ ; MR1 = Y2, MAR2 += 2
MMACF32 MR3, MR2, MR2, MR0, MR1 ; MR3 = A + B, MR2 = C = X2 * Y2
|| MMOV32 MR0, *MAR0[2]++ ; In parallel MR0 = X3
MMOV32 MR1, *MAR1[2]++ ; MR1 = Y3
MMACF32 MR3, MR2, MR2, MR0, MR1 ; MR3 = (A + B) + C, MR2 = D = X3 * Y3
|| MMOV32 MR0, *MAR0 ; In parallel MR0 = X4
MMOV32 MR1, *MAR1 ; MR1 = Y4
MMPYF32 MR2, MR0, MR1 ; MR2 = E = X4 * Y4
|| MADDF32 MR3, MR3, MR2 ; in parallel MR3 = (A + B + C) + D
MADDF32 MR3, MR3, MR2 ; MR3 = (A + B + C + D) + E
MMOV32 @_Result, MR3 ; Store the result MSTOP ; end of task
See also
Control Law Accelerator (CLA)
656
TMS320x2806x Microcontrollers
SPRUH18I – JANUARY 2011 – REVISED JUNE 2022
Copyright © 2022 Texas Instruments Incorporated
Содержание TMS320 2806 Series
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