INSTRUCTION DESCRIPTIONS
A - 270
INSTRUCTION SET DETAILS
MOTOROLA
Operation:
Assembler Syntax:
D–S–C
➞
D (parallel move)
SBC
S,D (parallel move)
Description: Subtract the source operand S and the carry bit C of the condition code
register from the destination operand D and store the result in the destination accumula-
tor. Long words (48 bits) may be subtracted from the (56-bit) destination accumulator.
Note: The carry bit is set correctly for multiple-precision arithmetic using long-word oper-
ands if the extension register of the destination accumulator (A2 or B2) is the sign exten-
sion of bit 47 of the destination accumulator (A or B).
Example:
:
MOVE L:<$0,X
;get a 48-bit LS long-word operand in X
MOVE L:<$1,A
;get other LS long word in A (sign ext.)
MOVE L:<$2,Y
;get a 48-bit MS long-word operand in Y
SUB X,A L:<$3,B
;sub. LS words; get other MS word in B
SBC YB A10,L:<$4
;sub. MS words with carry; save LS dif.
MOVE B10,L:<$5
;save MS difference
:
SBC
Subtract Long with Carry
SBC
Before Execution
After Execution
A
$00:000000:000000
X
X
$800000:000000
$800000:000000
$00:800000:000000
A
B
B
$00:000000:000003
$00:000000:000001
Y
Y
$000000:000001
$000000:000001
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 ...