What is an immediate in RISC-V?

RISC-V has an asymmetric immediate encoding which means that the immediates are formed by concatenating different bits in an asymmetric order based on the specific immediate formats. Note that in RISC-V all immediates are always sign extended, and the sign-bit for the immediate is always in bit 31 of the instruction.

What is RISC-V based on?

RISC-V (pronounced “risk-five” ) is an open standard instruction set architecture (ISA) based on established reduced instruction set computer (RISC) principles. Unlike most other ISA designs, the RISC-V ISA is provided under open source licenses that do not require fees to use.

What is special about RISC-V?

RISC-V is significant because it will allow smaller device manufacturers to build hardware without paying royalties and allow developers and researchers to design and experiment with a proven and freely available instruction set architecture.

What is a word in RISC-V?

31. 0. • By convention, RISCV instructions are each. 1 word = 4 bytes = 32 bits.

What is Slli in RISC-V?

SLLI is a logical left shift (zeros are shifted into the lower bits); SRLI is a logical right shift (zeros are shifted into the upper bits); and SRAI is an arithmetic right shift (the original sign bit is copied into the vacated upper bits). shift amount is encoded in the lower 5 bits of the I-immediate field.

What is Spike simulator?

Spike is the golden reference functional RISC-V ISA C++ sofware simulator. It provides full system emulation or proxied emulation with HTIF/FESVR. It serves as a starting point for running software on a RISC-V target.

What is SW in RISC-V?

RISC-V contains integer and logic instructions as well as a few memory instructions. RISC-V is a load/store architecture, so integer instruction operands must be registers. Stores (dereferences) from register t0 into memory address (sp + 8). sb = store byte, sh = store halfword, sw = store word, sd = store doubleword.

What is Li in RISC-V?

1. 3. There is a li (load immediate) alias or pseudo instruction that provides the functionality you are referring too.