FSGNJX.S

Float Sign Injection XOR (Single)

FSGNJX.S rd, rs1, rs2

Injects the XOR of signs of rs1 and rs2. Used to copy sign.

Details

Produces a result with the magnitude of rs1 and the sign bit taken from the source rs2. Used to implement floating-point absolute value, negate, and copy-sign.

Pseudocode Operation

F[rd] = {F[rs1][31] ^ F[rs2][31], F[rs1][30:0]};

Example

FSGNJX.S f1, f1, f2

Encoding

Binary Layout
0010000
31:25
rs2
24:20
rs1
19:15
010
14:12
rd
11:7
1010011
6:0
 
Format R-Type
Opcode 0x53
Extension F

Operands

  • rd
    Destination register (integer)
  • rs1
    Source register 1 (integer)
  • rs2
    Source register 2 (integer)