FSGNJN.S

Float Sign Injection Negate (Single)

FSGNJN.S rd, rs1, rs2

Injects the *negated* sign of rs2 into rs1. Used for negation and absolute value.

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[rs2][31], F[rs1][30:0]};

Example

FSGNJN.S f1, f2, f2

Encoding

Binary Layout
0010000
31:25
rs2
24:20
rs1
19:15
001
14:12
rd
11:7
1010011
6:0
 
Format R-Type
Opcode 0x53
Extension F

Operands

  • rd
    Destination register (integer)
  • rs1
    Source (Body)
  • rs2
    Source (Sign)