MOTOROLA
DSP96002 USER’S MANUAL
A - 37
BCLR
Bit Test and Clear
BCLR
Operation:
D{n}
→
C;
0
→
D{n}
D{n}
→
C;
0
→
D{n}
D{n}
→
C;
0
→
D{n}
D{n}
→
C;
0
→
D{n}
D{n}
→
C;
0
→
D{n}
D{n}
→
C;
0
→
D{n}
D{n}
→
C;
0
→
D{n}
Assembler Syntax:
BCLR #bit,X: ea
BCLR #bit,X: aa
BCLR #bit,X: pp
BCLR #bit,Y: ea
BCLR #bit,Y: aa
BCLR #bit,Y: pp
BCLR #bit,D
Description:
The nth bit of the destination operand is tested and the state of the nth bit is reflected in the C condition
code bit. After the test, the nth bit is cleared in the destination. All memory alterable addressing modes
may be used. Register, Absolute Short and I/O Short addressing may also be used.
The bit to be tested is selected by an immediate bit number 0-31. This instruction performs a read-modify-
write operation on the destination operand and requires two destination accesses. This instruction pro-
vides a test-and-clear capability which is useful for synchronizing multiple processors using a shared
memory. See Section A.10 for restrictions.
CCR Condition Codes:
For destination operand SR:
C
- Cleared if bit 0 is specified. Not affected otherwise.
V
- Cleared if bit 1 is specified. Not affected otherwise.
Z
- Cleared if bit 2 is specified. Not affected otherwise.
N
- Cleared if bit 3 is specified. Not affected otherwise.
I
- Cleared if bit 4 is specified. Not affected otherwise.
LR
- Cleared if bit 5 is specified. Not affected otherwise.
–
R
- Cleared if bit 6 is specified. Not affected otherwise.
A
- Cleared if bit 7 is specified. Not affected otherwise.
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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