TSK3000A - Shift Instructions
Shift instructions perform shift operations and store the resulting values in registers. All of these instructions are R-type instructions, with the immediate shift amount stored in the IMM5 field for the immediate shift instructions.
Table 1. Shift Instructions.| Mnemonic | Instruction | Description |
|---|---|---|
SLL rC, rB, IMM5 | Shift Left Logical | Left-shifts the contents of GPR rB by the number of bits specified by the immediate value, IMM5. Then zero-fills the low-order bits and puts the result in GPR rC |
SLLV rC, rB, rA | Shift Left Logical Variable | Left-shifts the contents of GPR rB (by the number of bits designated by the low-order five bits of GPR rA), zero-fills the low-order bits and puts the 32-bit result in GPR rC |
SRA rC, rB, IMM5 | Shift Right Arithmetic | Right-shifts the contents of GPR rB by the number of bits specified by the immediate value, IMM5. The high-order (IMM5) bits become sign-extended and the resulting word is put in GPR rC |
SRAV rC, rB, rA | Shift Right Arithmetic Variable | Right-shifts the contents of GPR rB (by the number of bits designated by the low-order five bits of GPR rA). The high-order (rA 4..0 ) bits become sign-extended and the resulting word is put in GPR rC |
SRL rC, rB, IMM5 | Shift Right Logical | Right-shifts the contents of GPR rB by the number of bits specified by the immediate value, IMM5. Then zero-fills the high-order (IMM5) bits and puts the result in GPR rC |
SRLV rC, rB, rA | Shift Right Logical Variable | Right-shifts the contents of GPR rB (by the number of bits designated by the low-order five bits of GPR rA), zero-fills the high-order (rA 4..0 ) bits and puts the 32-bit result in GPR rC |