dsp56000 Freescale Semiconductor, Inc, dsp56000 Datasheet - Page 335

• Manufacturer Part Number: dsp56000
• Description: 24-bit Digital Signal Processor Family Manual
• Manufacturer: Freescale Semiconductor, Inc

Instruction Format:
Opcode:
Instruction Fields:
Destination Register
4 registers in Data ALU
8 accumulators in Data ALU
8 address registers in AGU
8 address offset registers in AGU
8 address modifier registers in AGU
8 program controller registers
See Section A.10 and Table A-18 for specific register encodings.
Notes: If A or B is specified as the destination operand, the following sequence of events
Timing: 4+mvb oscillator clock cycles
Memory: 1+ea program words
MOTOROLA
BTST
1. The S bit is computed according to its definition (See Section A.5)
2. The accumulator value is scaled according to the scaling mode bits S0
3. If the accumulator extension is in use, the output of the shifter is limited
4. The bit test is performed on the resulting 24-bit value and the C bit is set
BTST
#n=bit number=bbbbb,
D=destination register=DDDDDD,
xxxx=16-bit Absolute Address in extension word
takes place:
and S1 in the status register (SR).
to the maximum positive or negative saturation constant, and the L bit is
set.
if the bit tested is set. The original contents of A or B are not changed.
23
0
0
#n,D
0
0
1
Freescale Semiconductor, Inc.
0
For More Information On This Product,
1
INSTRUCTION DESCRIPTIONS
INSTRUCTION SET DETAILS
16 15
1
Go to: www.freescale.com
1
1
D D D D D D
0 0 0 1 D D
0 0 1 D D D
0 1 0 T T T
0 1 1 N N N
1 0 0 F F F
1 1 1 G G G
D
Bit Test
D
D
D
D
8
D
7
0
Bit Number bbbbb
1
1
10111
00000
b
b
b
BTST
b
0
b
A - 69