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DSP96002 USER’S MANUAL
MOTOROLA
SUBC
Subtract with Carry
SUBC
Instruction Fields:
(u u)
D
d d d
Dn.L
n n n
where nnn = 0-7
S
s s s
Dn.L
n n n
where nnn = 0-7
Timing: 2 + mv oscillator clock cycles
Memory: 1 + mv program words
Operation:
D.L - S.L - C
→
D.L (parallel data bus move)
Assembler Syntax:
SUBC S,D
(move syntax - see the Move instruction de-
scription.)
Description:
Subtract the low portion of the specified source operand S from the low portion of the destination operand
D along with the C bit of the condition code register and store the result in the low portion of D. This in-
struction is useful in multiple precision integer arithmetic routines. Note that the higher precision long words
of the input variables must be moved to the low portion of the Dn.
Input Operand(s) Precision: 32-bit integer.
Output Operand Precision: 32-bit integer.
CCR Condition Codes:
C
- Set if a borrow is generated from the MSB of the result. Cleared otherwise.
V
- Set if result overflows. Cleared otherwise.
Z
- Cleared if the result is not zero. Unchanged otherwise.
N
- Set if result is negative. Cleared otherwise.
I
- Not affected.
LR
- Not affected.
–
R
- Not affected.
A
- Not affected.
ER Status Bits: Not affected.
IER Flags: Not affected.
Instruction Format: SUBC S,D (move syntax - see the Move instruction description.)
00
1sss
uu10
1ddd
31
14 13
0
OPTIONAL EFFECTIVE ADDRESS EXTENSION OR IMMEDIATE LONG DATA
DATA BUS MOVE FIELD
Summary of Contents for DSP96002
Page 3: ...1 2 DSP96002 USER S MANUAL MOTOROLA ...
Page 38: ...MOTOROLA DSP96002 USER S MANUAL 3 15 Figure 3 4 Modulo Arithmetic Unit Block Diagram ...
Page 39: ...3 16 DSP96002 USER S MANUAL MOTOROLA ...
Page 53: ...4 14 DSP96002 USER S MANUAL MOTOROLA ...
Page 76: ...MOTOROLA DSP96002 USER S MANUAL 5 23 Figure 5 8 Address Modifier Summary ...
Page 86: ...6 10 DSP96002 USER S MANUAL MOTOROLA ...
Page 101: ...MOTOROLA DSP96002 USER S MANUAL 7 15 Figure 7 9 HI Block Diagram One Port ...
Page 140: ...7 54 DSP96002 USER S MANUAL MOTOROLA ...
Page 166: ...9 10 DSP96002 USER S MANUAL MOTOROLA ...
Page 181: ...MOTOROLA DSP96002 USER S MANUAL 10 15 Figure 10 8 Program Address Bus FIFO ...
Page 337: ...MOTOROLA DSP96002 USER S MANUAL A 149 ...
Page 404: ...A 216 DSP96002 USER S MANUAL MOTOROLA PC xxxx D ...
Page 460: ...A 272 DSP96002 USER S MANUAL MOTOROLA SIOP Not affected ...
Page 484: ...A 296 DSP96002 USER S MANUAL MOTOROLA SSH PC SSL SR SP 1 SP ...
Page 519: ...MOTOROLA DSP96002 USER S MANUAL A 331 ...
Page 718: ...MOTOROLA DSP96002 USER S MANUAL B 199 ...
Page 871: ... MOTOROLA INC 1994 MOTOROLA TECHNICAL DATA SEMICONDUCTOR M Addendum ...
Page 888: ...MOTOROLA INDEX 1 INDEX ...
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