HLV.B

Hypervisor Load Byte

HLV.B rd, (rs1)

Loads a byte from Guest Physical Memory (VS-stage translation only).

Details

HLV.B performs a virtual-machine load of a byte from the address in rs1, using the virtual supervisor address space (VS-mode translation). The result is sign-extended and written to rd.

Pseudocode Operation

R[rd] = sext(GuestMem[R[rs1]][7:0]);

Example

HLV.B x10, (x11)

Encoding

Binary Layout
0110000
31:25
00000
24:20
rs1
19:15
100
14:12
rd
11:7
1110011
6:0
 
Format R-Type (System)
Opcode 0x73
Extension H

Operands

  • rd
    Destination register (integer)
  • rs1
    Guest Address