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INSTRUCTION DESCRIPTIONS
A - 288
INSTRUCTION SET DETAILS
MOTOROLA
Operation:
Assembler Syntax:
S
➞
D (parallel move)
TFR S,D (parallel move)
Description: Transfer data from the specified source data ALU register S to the speci-
fied destination data ALU accumulator D. TFR uses the internal data ALU data paths;
thus, data does not pass through the data shifter/limiters. This allows the full 56-bit con-
tents of one of the accumulators to be transferred into the other accumulator without
data shifting and/or limiting. Moreover, since TFR uses the internal data ALU data paths,
parallel moves are possible. The TFR instruction only affects the L condition code bit
which can be set by data limiting associated with the instruction’s parallel move opera-
tions.
Example:
:
TFR A,B A,X1
Y:(R4+N4),Y0
;move A to B and X1, update Y0
:
Explanation of Example: Prior to execution, the 56-bit A accumulator contains the
value $01:234567:89ABCD, and the 56-bit B accumulator contains the value
$ff:FFFFFF:FFFFFF. The execution of the TFR A,B instruction moves the 56-bit value in
the A accumulator into the 56-bit B accumulator using the internal data ALU data paths
without any data shifting and/or limiting. The value in the B accumulator would have
been limited if a MOVE A,B instruction had been used. Note, however, that the parallel
move portion of the TFR instruction does use the data shifter/limiters. Thus, the value
stored in the 24-bit X1 register (not shown) would have been limited in this example.
This example illustrates a triple move instruction.
TFR
Transfer Data ALU Register
TFR
Before Execution
After Execution
A
$01:234567:89ABCD
B
B
$FF:FFFFFF:FFFFFF
$01:234567:89ABCD
$01:234567:89ABCD
A
Summary of Contents for DSP56K
Page 12: ...xii LIST of TABLES MOTOROLA List of Tables Continued Table Page Number Title Number ...
Page 13: ...MOTOROLA DSP56K FAMILY INTRODUCTION 1 1 SECTION 1 DSP56K FAMILY INTRODUCTION ...
Page 31: ...MOTOROLA DATA ARITHMETIC LOGIC UNIT 3 1 SECTION 3 DATA ARITHMETIC LOGIC UNIT ...
Page 50: ...DATA ALU SUMMARY 3 20 DATA ARITHMETIC LOGIC UNIT MOTOROLA ...
Page 51: ...MOTOROLA ADDRESS GENERATION UNIT 4 1 SECTION 4 ADDRESS GENERATION UNIT ...
Page 77: ...MOTOROLA PROGRAM CONTROL UNIT 5 1 SECTION 5 PROGRAM CONTROL UNIT ...
Page 124: ...INSTRUCTION GROUPS 6 30 INSTRUCTION SET INTRODUCTION MOTOROLA ...
Page 125: ...MOTOROLA PROCESSING STATES 7 1 SECTION 7 PROCESSING STATES STOP WAIT EXCEPTION NORMAL RESET ...
Page 167: ...STOP PROCESSING STATE MOTOROLA PROCESSING STATES 7 43 ...
Page 168: ...STOP PROCESSING STATE 7 44 PROCESSING STATES MOTOROLA ...
Page 169: ...MOTOROLA PORT A 8 1 SECTION 8 PORT A ...
Page 176: ...PORT A INTERFACE 8 8 PORT A MOTOROLA ...
Page 177: ...MOTOROLA PLL CLOCK OSCILLATOR 9 1 SECTION 9 PLL CLOCK OSCILLATOR x x d Φ VCO ...
Page 191: ...10 2 ON CHIP EMULATION OnCE MOTOROLA SECTION 10 ON CHIP EMULATION OnCE ...
Page 218: ...USING THE OnCE MOTOROLA ON CHIP EMULATION OnCE 10 29 ...
Page 604: ...INSTRUCTION ENCODING A 338 INSTRUCTION SET DETAILS MOTOROLA ...
Page 605: ...MOTOROLA BENCHMARK PROGRAMS B 1 APPENDIX B BENCHMARK PROGRAMS T T T T T P1 P3 P2 P4 T T T ...
Page 609: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 5 ...
Page 611: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 7 ...
Page 613: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 9 ...
Page 615: ...BENCHMARK PROGRAMS MOTOROLA BENCHMARK PROGRAMS B 11 ...