FLI.D

Float Load Immediate (Double)

FLI.D rd, rs1

Loads a common double-precision constant into a register.

Encoding

Binary Layout

111100100001

31:20

rs1

19:15

000

14:12

rd

11:7

1010011

6:0

 

Format R-Type

Opcode 0xF2100053

Extension Zfa

Operands

• rd
  Destination register (integer)
• rs1
  Constant Index

Example

FLI.D t0, a0

Related

More in Zfa

Reference

View in RISC-V Unprivileged ISA Specification ↗ RISC-V ISA Manual

Description

Loads a double-precision (64-bit) floating-point constant from a predefined lookup table (indexed by rs1) into fd. Provides common constants such as -1, 0, 1, 2, ∞, and others without a memory access.

Operation

F[rd] = DoubleTable[rs1];