Motorola dsp assembler Reference Manual
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Device-dependent Information DSP56000 Information MOTOROLA DSP ASSEMBLER REFERENCE MANUAL F-5 F.2.1.6 Program Control Instructions The DSP56000 instructions used for program control are: DEBUG — Enter debug mode DEBUGcc — Enter debug mode conditionally ILLEGAL — Illegal instruction interrupt Jcc — Jump conditionally JCLR — Jump if bit clear JMP — Jump JScc — Jump to subroutine conditionally JSCLR — Jump to subroutine if bit clear JSET — Jump if bit set JSSET — Jump to subroutine if bit set JSR — Jump to subroutine NOP — No operation REP — Repeat next instruction RESET — Reset on-chip peripheral devices RTI — Return from interrupt RTS — Return from subroutine STOP — Stop processing (low power standby) SWI — Software interrupt WAIT — Wait for interrupt (low power standby) Device-dependent Information DSP56000 Information F-6 DSP ASSEMBLER REFERENCE MANUAL MOTOROLA F.2.2 Register Names and Usage The following DSP56000 register names, in either upper or lower case, cannot be used as symbol names in an assembly language source file: X A AB X0 A0 BA X1 A1 A10 Y B B10 Y0 B0 A2 Y1 B1 B2 R0 N0 M0 MR R1 N1 M1 CCR R2 N2 M2 SR R3 N3 M3 LC R4 N4 M4 LA R5 N5 M5 SSH R6 N6 M6 SSL R7 N7 M7 OMR The following DSP56000 registers are used by the Assembler in structured control state- ment processing (Chapter 7): A X0 Y0 Device-dependent Information DSP56000 Information MOTOROLA DSP ASSEMBLER REFERENCE MANUAL F-7 F.2.3 Condition Code Mnemonics Following are the DSP56000 condition code mnemonics which correspond to the condi- tional instructions based on the CCR condition codes. These tests may be used in an op- erand comparison expression within a structured control statement (Chapter 7). <CC> — carry clear <CS> — carry set <EC> — extension clear <EQ> — equal <ES> — extension set <GE> — greater or equal <GT> — greater than <HS> — higher or same <LC> — limit clear <LE> — less or equal <LO> — lower <LS> — limit set <LT> — less than <MI> — minus <NE> — not equal <NN> — not normalized <NR> — normalized <PL> — plus Device-dependent Information DSP96000 Information F-8 DSP ASSEMBLER REFERENCE MANUAL MOTOROLA F.3 DSP96000 INFORMATION The Motorola DSP96000 refers to a family of dual-port IEEE floating point programmable CMOS processors. The DSP960002 supports IEEE 754 single precision and single ex- tended precision floating point and 32-bit signed and unsigned fixed point arithmetic. F.3.1 Instruction Set Summary DSP96000 instructions can be grouped by function into six types: 1. Arithmetic instructions 2. Logical instructions 3. Bit manipulation instructions 4. Loop instructions 5. Move instructions 6. Program control instructions F.3.1.1 Arithmetic Instructions The DSP96000 instructions used for arithmetic operations are: ABS — Absolute value* ADD — Add* ADDC — Add with carry* ASL — Arithmetic shift left* ASR — Arithmetic shift right* BFIND — Find leading one* CLR — Clear register* CMP — Compare* CMPG — Graphics compare* DEC — Decrement by one* EXT — Sign extend half word* EXTB — Sign extend byte* FABS — Floating point absolute value* FADD — Floating point add* FADDSUB — Floating point add and subtract* FCLR — Clear floating point register* FCMP — Floating point compare* FCMPG — Floating point graphics compare* FCMPM — Floating point magnitude compare* FCOPYS — Floating point copy sign* *Instruction allows parallel data move. Device-dependent Information DSP96000 Information MOTOROLA DSP ASSEMBLER REFERENCE MANUAL F-9 FGETMAN — Extract mantissa* FINT — Extract integer* FLOAT — Convert integer to floating point* FLOATU — Unsigned integer to floating point* FLOOR — Extract integer* FMPY — Floating point multiply* FMPY/FADD — Floating point multiply and add* FMPY/FSUB — Floating point multiply and subtract* FMPY/FADDSUB — Floating point multiply and add/subtract* FNEG — Floating point negate* FSCALE — Scale floating point operand* FSEEDD — Reciprocal approximation FSEEDR — Square root reciprocal approximation FSUB — Floating point subtract* FTST — Test floating point operand* GETEXP — Extract exponent* INC — Increment by one* INT — Convert floating point to integer* INTRZ — Convert floating point to integer with round to zero* INTU — Convert floating point to unsigned integer* INTURZ — Convert floating point to unsigned integer with round to zero* JOIN — Join two 16-bit integers* JOINB — Join two 8-bit integers* MPYS — Signed multiply* MPYU — Unsigned multiply* NEG — Negate* NEGC — Negate with carry* RND — Round accumulator* SETW — Set operand* SPLIT — Extract 16-bit integer* SPLITB — Extract 8-bit integer* SUB — Subtract* SUBC — Subtract with carry* TST — Test* *Instruction allows parallel data move. Yüklə 4,8 Kb. Dostları ilə paylaş:
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